From 232553d3f6018f35932355bcedd4f467e3f5a63a Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Mon, 29 Dec 2025 21:01:23 +0200 Subject: [PATCH 01/51] feat(desktop): terminal persistence via daemon process Implement terminal session persistence using a background daemon process that survives app restarts. Key features: - Terminal host daemon: Long-lived process that owns PTYs and maintains terminal emulation state while Electron app is closed - Headless terminal emulator: Captures full terminal state (screen, scrollback, modes) for perfect resume - NDJSON-over-Unix-socket IPC: Secure communication with token authentication - DaemonTerminalManager: Drop-in replacement that delegates to daemon while preserving existing TRPC API When enabled (SUPERSET_TERMINAL_DAEMON=1), terminals persist across app quit/restart with exact screen state and interactive input working immediately. --- ...rminal-host-daemon-terminal-persistence.md | 512 ++++++++++++++ apps/desktop/electron.vite.config.ts | 5 + apps/desktop/package.json | 1 + .../src/lib/trpc/routers/terminal/terminal.ts | 7 +- .../src/main/lib/terminal-host/client.ts | 611 +++++++++++++++++ .../lib/terminal-host/headless-emulator.ts | 437 ++++++++++++ .../prototype/headless-roundtrip.test.ts | 529 +++++++++++++++ .../src/main/lib/terminal-host/types.ts | 303 +++++++++ .../src/main/lib/terminal/daemon-manager.ts | 446 ++++++++++++ apps/desktop/src/main/lib/terminal/index.ts | 45 +- apps/desktop/src/main/lib/terminal/types.ts | 10 + .../src/main/terminal-host/daemon.test.ts | 429 ++++++++++++ apps/desktop/src/main/terminal-host/index.ts | 495 ++++++++++++++ .../terminal-host/session-lifecycle.test.ts | 642 ++++++++++++++++++ .../desktop/src/main/terminal-host/session.ts | 388 +++++++++++ .../src/main/terminal-host/terminal-host.ts | 206 ++++++ bun.lock | 3 + 17 files changed, 5067 insertions(+), 2 deletions(-) create mode 100644 20251229-1858-terminal-host-daemon-terminal-persistence.md create mode 100644 apps/desktop/src/main/lib/terminal-host/client.ts create mode 100644 apps/desktop/src/main/lib/terminal-host/headless-emulator.ts create mode 100644 apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts create mode 100644 apps/desktop/src/main/lib/terminal-host/types.ts create mode 100644 apps/desktop/src/main/lib/terminal/daemon-manager.ts create mode 100644 apps/desktop/src/main/terminal-host/daemon.test.ts create mode 100644 apps/desktop/src/main/terminal-host/index.ts create mode 100644 apps/desktop/src/main/terminal-host/session-lifecycle.test.ts create mode 100644 apps/desktop/src/main/terminal-host/session.ts create mode 100644 apps/desktop/src/main/terminal-host/terminal-host.ts diff --git a/20251229-1858-terminal-host-daemon-terminal-persistence.md b/20251229-1858-terminal-host-daemon-terminal-persistence.md new file mode 100644 index 00000000000..f3297f4ee3e --- /dev/null +++ b/20251229-1858-terminal-host-daemon-terminal-persistence.md @@ -0,0 +1,512 @@ +# Terminal persistence via Superset-owned terminal host daemon (Desktop) + +This ExecPlan is a living document. The sections `Progress`, `Surprises & Discoveries`, `Decision Log`, and `Outcomes & Retrospective` must be kept up to date as work proceeds. + +No `PLANS.md` file was found in this repository at the time of writing. Follow the ExecPlan template requirements embedded in the prompt for structure, idempotence, and validation. + +## Purpose / Big Picture + +After this change, a Superset Desktop user can enable “terminal session persistence” and then: + +1. Open a terminal pane and start a long-running terminal UI (a “TUI”, e.g. `vim`, `htop`, `opencode`, `less`). +2. Quit Superset Desktop (including via auto-update install flow). +3. Reopen Superset Desktop and see the terminal come back exactly as it was (“perfect resume”): the screen contents match, the cursor/modes match, and interactive input works immediately (arrow keys, mouse, bracketed paste, etc.). +4. While the app was closed, the terminal continued running and its output was captured; reopening shows the up-to-date TUI state and recent scrollback. + +The key implementation change is introducing a long-lived background “terminal host” process (a daemon) that owns the PTYs and maintains terminal emulation state while the Electron app is closed. The Electron main process becomes a client of this daemon and continues to expose the same TRPC terminal interface to the renderer. + +## Assumptions + +1. This work targets `origin/main` and will be implemented on a new branch created from `origin/main` (e.g. `feat/terminal-host-daemon`). +2. macOS is the primary supported platform today; Linux is secondary. Windows support is explicitly deferred but must be feasible with the chosen abstractions. +3. The project continues to use `node-pty` as the PTY implementation for macOS/Linux (current dependency in `apps/desktop/package.json`). +4. The renderer continues to use xterm.js (`@xterm/xterm`) as the visible terminal UI (current implementation under `apps/desktop/src/renderer/.../Terminal`). +5. “Survive app updates” means: installing an update (on macOS via `electron-updater`) does not kill terminal sessions; a newly-launched updated app can attach to the already-running sessions. +6. “Perfect TUI resume” is interpreted strictly: the user should not need to “press a key to redraw” or rely on application-specific repaint behavior; the terminal state must be restored deterministically from the daemon-maintained emulator state. + +If any assumption is wrong, record the correction in `Decision Log` and update all impacted sections. + +## Open Questions + +**All questions resolved.** See Decision Log for details. + +1. ~~Persistence default and UX~~ → **RESOLVED**: Opt-in setting in Behaviors page, default off. +2. ~~Update/version skew policy~~ → **RESOLVED**: (A) Old daemon continues; additive protocol changes only. +3. ~~Output retention bounds~~ → **RESOLVED**: Configurable settings; defaults 10k lines + 4 MB disk per session. +4. ~~Multi-window semantics~~ → **RESOLVED**: Not applicable; single client per session. +5. ~~Security posture~~ → **RESOLVED**: User-only socket + token file. +6. ~~"Perfect resume" acceptance set~~ → **RESOLVED**: Test opencode, claude code, codex. + +## Progress + +- [x] (2025-12-29 18:58 local) Create new branch from `origin/main` and add this ExecPlan. +- [x] (2025-12-29 19:30 local) Implement prototyping harness for headless emulation + snapshot round-trip. **Milestone 1 complete** - 29 tests pass. +- [x] (2025-12-29 19:45 local) Implement daemon entrypoint and IPC framing. **Milestone 2 complete** - 6 tests pass. + - Created daemon entrypoint at `apps/desktop/src/main/terminal-host/index.ts` + - Updated `electron.vite.config.ts` to build daemon as separate bundle + - Implemented NDJSON protocol over Unix domain socket + - Implemented token-based authentication + - All hello/auth tests passing +- [x] (2025-12-29 20:00 local) Implement daemon session manager (PTY + headless emulator + capture). **Milestone 3 substantially complete** - 9 tests pass, 4 skipped (PTY tests). + - Created `Session` class with PTY + HeadlessEmulator integration + - Created `TerminalHost` class for session lifecycle management + - Implemented all IPC handlers (createOrAttach, write, resize, detach, kill, killAll, listSessions, clearScrollback) + - Data/exit event streaming to attached clients implemented + - Note: Some integration tests skipped due to bun/node-pty compatibility issue (see Surprises) + - Output capture to disk (ring buffer) deferred to later milestone +- [x] (2025-12-29 19:30 local) Integrate daemon client into Electron main process and preserve existing TRPC API. **Milestone 4 substantially complete**. + - Created `TerminalHostClient` at `apps/desktop/src/main/lib/terminal-host/client.ts` + - Manages connection to daemon socket + - Spawns daemon if not running (detached process with ELECTRON_RUN_AS_NODE=1) + - Handles authentication and request/response framing + - Forwards data/exit events via EventEmitter + - Created `DaemonTerminalManager` at `apps/desktop/src/main/lib/terminal/daemon-manager.ts` + - Same interface as original `TerminalManager` + - Delegates all operations to `TerminalHostClient` + - Maintains EventEmitter compatibility for TRPC subscriptions + - Updated `apps/desktop/src/main/lib/terminal/index.ts` + - Added `getActiveTerminalManager()` function + - Controlled by `SUPERSET_TERMINAL_DAEMON=1` env var for testing + - Updated TRPC terminal router to: + - Use `getActiveTerminalManager()` for manager selection + - Return snapshot payload in `createOrAttach` response + - Build passes, tests pass (362 pass, 4 skip, 1 fail - pre-existing) + - Note: Manual testing pending - set `SUPERSET_TERMINAL_DAEMON=1` and run `bun dev` +- [ ] Update renderer terminal to apply daemon snapshot + mode rehydration before streaming. +- [ ] Add persistence setting + quit/update behavior changes; add "Stop background sessions" control. +- [ ] Add tests + manual acceptance checklist; document known limitations and recovery steps. +- [ ] Fill in Outcomes & Retrospective; move plan to `.agents/plans/done/` when PR is created. + +## Surprises & Discoveries + +- **bun/node-pty test compatibility issue** (2025-12-29): When running integration tests with real PTYs via bun, there's an internal node-pty error: `this._socket.write is not a function`. This affects PTY write operations in the test environment. The existing TerminalManager tests work around this by mocking node-pty entirely. For the daemon, we've skipped the PTY-dependent integration tests and will rely on manual testing until this is resolved. The core daemon infrastructure (socket, auth, NDJSON protocol) is fully tested. + +## Decision Log + +Add entries here as decisions are made and questions are resolved. + +- **Decision (Q1): Persistence default and UX** — RESOLVED + Setting added to Behaviors settings page with default **off**. + Rationale: Lower risk for v1; users consciously opt-in to background daemon behavior. Can flip to default-on in future release once confidence is high. + Date: 2025-12-29. + +- **Decision (Q2): Update/version skew policy** — RESOLVED + **(A) Old daemon continues running** when app updates. New app speaks old protocol. + Protocol changes must be additive-only. If breaking change required, bump `protocolVersion` and show user prompt to restart terminals. + Rationale: The whole point of persistence is surviving app restarts — updates are the primary restart trigger. + Date: 2025-12-29. + +- **Decision (Q3): Output retention bounds** — RESOLVED + Configurable via Behaviors settings page. Defaults: + - Emulator scrollback: **10,000 lines** (range: 1k–100k) + - Disk ring buffer: **4 MB per session** (range: 1–32 MB) + Rationale: Users may have 100+ terminals; conservative defaults (100 sessions × 4 MB = 400 MB disk) prevent resource exhaustion. Power users can increase via settings. + Date: 2025-12-29. + +- **Decision (Q4): Multi-window attach semantics** — RESOLVED + **Not applicable.** The same terminal pane cannot be visible in multiple windows simultaneously due to app architecture. Implementation assumes single attached client per session — no fanout logic needed. + Rationale: Simplifies protocol and eliminates race conditions. + Date: 2025-12-29. + +- **Decision (Q5): Security posture** — RESOLVED + **User-only socket + token file** is sufficient. + - `SUPERSET_HOME_DIR` created with mode `0700` + - Socket at `~/.superset/terminal-host.sock` inherits directory permissions + - Token file at `~/.superset/terminal-host.token` with mode `0600` + - Token is 32+ bytes from `crypto.randomBytes`, hex-encoded + - Token validated on every `hello` request + Rationale: Local-only threat model; if attacker has same-user access, they can already kill the daemon or read process memory. Token prevents accidental cross-user access. + Date: 2025-12-29. + +- **Decision (Q6): "Perfect resume" acceptance set** — RESOLVED + Test the following AI coding agents (primary use case for Superset users): + - **opencode** + - **claude code** (Anthropic's Claude CLI) + - **codex** (OpenAI Codex CLI) + These stress long-running sessions, bracketed paste, and complex terminal modes — the exact workflows being optimized. + Date: 2025-12-29. + +## Outcomes & Retrospective + +(to be filled as milestones complete) + +## Context and Orientation + +This repository is a Bun + Turborepo monorepo. The Superset Desktop app lives under `apps/desktop/` and is built with Electron + `electron-vite`. + +In Desktop, there are three relevant runtime “sides”: + +1. Main process (Node.js/Electron environment): `apps/desktop/src/main/` + This can use Node.js modules and is responsible for creating BrowserWindows, running the local SQLite DB, managing terminals, etc. +2. Renderer process (browser environment): `apps/desktop/src/renderer/` + This cannot import Node.js modules. It renders the UI and hosts xterm.js terminal UI components. +3. Shared modules: `apps/desktop/src/shared/` + These must not import Node.js modules; they’re used by both main and renderer. + +Today’s terminal architecture (before this change): + +1. Renderer terminal UI: `apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx` + - Creates a visible xterm.js instance. + - Calls TRPC mutations to create/attach a session, write input, resize, detach, clear scrollback. + - Subscribes to a TRPC stream of terminal output events. +2. TRPC terminal router: `apps/desktop/src/lib/trpc/routers/terminal/terminal.ts` + - Exposes `createOrAttach`, `write`, `resize`, `kill`, `detach`, `clearScrollback`, and `stream`. + - Delegates to `terminalManager` in the main process. +3. TerminalManager: `apps/desktop/src/main/lib/terminal/manager.ts` + - Owns `node-pty` processes in-memory and emits `data:` and `exit:` events. + - On app quit, the main process calls `terminalManager.cleanup()` from `apps/desktop/src/main/index.ts`, killing PTYs. +4. Terminal history: `apps/desktop/src/main/lib/terminal-history.ts` + - Writes scrollback to disk under `~/.superset*/terminal-history/...` for recovery within a running app session. + +Why this is insufficient for persistence: + +- A PTY session cannot be “reattached” after the owning process exits. Today, the Electron main process owns the PTYs, so quitting the app necessarily kills sessions. + +New architecture required: + +- Introduce a persistent background process that owns PTYs and the “terminal emulator state” so sessions outlive app restarts and TUIs remain correct even when the renderer is closed. + +Terminology used in this plan (definitions): + +- PTY (pseudo-terminal): the OS interface that lets us run a shell/program as if it’s connected to a terminal. `node-pty` provides a cross-platform-ish API to spawn PTYs. +- TUI: a text-based interactive UI that relies on terminal modes, cursor addressing, alternate screen buffers, mouse tracking, etc. +- Terminal emulator: software that interprets control sequences (ANSI/VT) to maintain a screen buffer and state. xterm.js is one. +- Daemon (terminal host): a background process that continues running after the Electron app exits. +- Snapshot/rehydration: the daemon provides enough information (screen contents + mode state) for the renderer to recreate the exact terminal state on attach. + +## Plan of Work + +This work is intentionally milestone-driven. Each milestone must leave the repository in a runnable/testable state and must be independently verifiable. Do not attempt to “big bang” the whole daemon + UI rewrite in one pass. + +### Milestone 1: Prototyping spike — prove “perfect resume” is achievable + +Goal: demonstrate, in code checked into this repo, that we can: + +1. Feed terminal output into a headless terminal emulator (in Node), keep it running while no UI exists, and +2. Produce a snapshot that can be applied to a fresh xterm.js instance such that interactive input behavior matches (application cursor keys, bracketed paste, mouse tracking). + +Work to do: + +1. Add a prototyping script + tests under `apps/desktop/src/main/lib/terminal-host/prototype/`: + - `apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts` + - The test should: + - Create a headless emulator instance. + - Apply a sequence of terminal bytes that: + - Enters alternate screen, draws a screen, moves cursor. + - Enables application cursor keys (`CSI ? 1 h`) and bracketed paste (`CSI ? 2004 h`). + - Enables mouse mode (choose one: `CSI ? 1000 h` and SGR `CSI ? 1006 h`). + - Produce a snapshot payload: `{ snapshotAnsi: string, modes: {...} }`. + - Apply it into a fresh xterm.js instance in Node (or a second headless instance) and assert: + - The visible buffer text matches expected lines. + - The emulator’s mode flags are consistent (for flags we explicitly track). +2. Dependency choice: + - Add `@xterm/headless` to `apps/desktop/package.json` (used only in main/daemon code). + - Reuse `@xterm/addon-serialize` (already present) for snapshot generation. +3. Decide “source of truth” for query responses: + - While *no renderer client is attached*, the daemon must send xterm-generated query responses back to the PTY. + - While *a renderer client is attached*, the renderer continues sending xterm’s `onData` to backend (as today), and the daemon must not double-respond. + +Exit criteria / proof: + +- `cd apps/desktop && bun test` includes the new headless round-trip test and it passes. + +If the spike fails (serialize cannot rehydrate required state), update this ExecPlan with a pivot: track mode state explicitly and reapply via control sequences on attach, even if the snapshot only contains screen text. + +### Milestone 2: Add a terminal host daemon entrypoint and IPC framing + +Goal: add a runnable daemon process that can start, accept a connection, and respond to a `hello` request. No PTYs yet. + +Work to do: + +1. Create a new daemon entrypoint: + - `apps/desktop/src/main/terminal-host/index.ts` + This file is executed in a Node context (via Electron with `ELECTRON_RUN_AS_NODE=1`) and must not import any renderer/shared browser-only modules. +2. Update build configuration to produce the daemon bundle: + - In `apps/desktop/electron.vite.config.ts`, add an additional Rollup input for the main build so `dist/main/terminal-host.js` is built alongside `dist/main/index.js`. +3. Implement IPC message framing: + - Use a newline-delimited JSON protocol (NDJSON) over a local socket: + - request: `{ id: string, type: string, payload: object }` + - response: `{ id: string, ok: true, payload: object }` or `{ id: string, ok: false, error: { code: string, message: string } }` + - events: `{ type: "event", event: string, payload: object }` + - This keeps early prototypes simple and debuggable. +4. Socket location: + - macOS/Linux: Unix domain socket at `join(SUPERSET_HOME_DIR, "terminal-host.sock")`. + - Ensure permissions by relying on existing `SUPERSET_HOME_DIR` mode `0700` (created by local-db initialization). If that’s not guaranteed early enough, explicitly `mkdir/chmod` within daemon. +5. Auth token: + - Generate a random token on first run and write to `join(SUPERSET_HOME_DIR, "terminal-host.token")` with `0600`. + - Require the client to send it in `hello`. + +Exit criteria / proof: + +- A small Node script in main can connect and get a valid `hello` response. + +### Milestone 3: Daemon session manager (PTY + headless emulator + capture) + +Goal: daemon can create sessions (spawn PTY), keep them running when no clients are attached, continuously capture output to disk, and provide attach snapshots. + +Work to do: + +1. Define daemon session identity and lifecycle: + - Session ID should be stable across restarts and updates. Use `workspaceId` + `paneId` from existing TRPC inputs. + - Store per-session metadata (cwd, createdAt, lastAttachedAt, cols/rows). +2. Implement a `TerminalHost` in `apps/desktop/src/main/lib/terminal-host/`: + - `TerminalHost` holds a `Map`. + - Each `Session` owns: + - the `node-pty` process + - a headless xterm instance (“emulator of record”) + - a bounded on-disk log (ring buffer) and minimal metadata file + - a set of currently attached clients (0 or more) and their stream subscriptions +3. Emulator responsibilities: + - All PTY output is fed into the headless emulator to maintain state. + - The headless emulator’s `onData` is treated as “terminal-generated responses”. + - If `attachedClients === 0`: write these responses to the PTY (so TUIs keep functioning while app closed). + - If `attachedClients > 0`: do not write (renderer is responsible; avoids duplicate responses). +4. Snapshot API: + - `attach(sessionId, cols, rows)` returns: + - `snapshotAnsi`: serialized screen state string suitable to `xterm.write()`. + - `rehydrateSequences`: a small set of control sequences to restore input-affecting modes (application cursor keys, bracketed paste, mouse reporting, focus reporting, alt-screen, cursor visibility). + - `cwd` (best-effort, derived from OSC-7 parsing in output; see note below). + - `meta` including `attachedAt`, `cols/rows`. + - The daemon must keep mode state explicitly (don’t rely on private xterm internals). + - Track DECSET/DECRST `CSI ? Pm h/l` for the specific mode numbers needed. +5. CWD tracking: + - Move OSC-7 parsing to a shared module under `apps/desktop/src/shared/parse-cwd.ts` (no Node imports). + - The daemon parses PTY output stream to update `session.cwd`. +6. Output capture while closed: + - Write the raw output stream (post-clear-filtering if desired) to a bounded file (ring). + - Also keep emulator scrollback bounded via xterm options. + +Exit criteria / proof: + +- Manual: start daemon, create session, run a TUI, detach client (simulate by closing app window), confirm process continues and output grows in ring file, then reattach and see correct screen. +- Automated: add at least one integration-style test that spawns a short-lived PTY program that uses alternate screen + cursor movement and validate snapshot round-trip. + +### Milestone 4: Electron main integration (client + TRPC compatibility) + +Goal: keep the renderer’s TRPC interface mostly unchanged, but route terminal operations through the daemon instead of owning PTYs in-process. + +Work to do: + +1. Add a `TerminalHostClient` in main: + - `apps/desktop/src/main/lib/terminal-host/client.ts` + - Responsibilities: + - Ensure daemon is running (start if not). + - Maintain a connection pool (or single connection) and reconnect logic. + - Expose typed methods: `createOrAttach`, `write`, `resize`, `detach`, `kill`, `clearScrollback`, `subscribe`. +2. Start/ensure daemon: + - Spawn detached `process.execPath` with `ELECTRON_RUN_AS_NODE=1` and script path pointing at `dist/main/terminal-host.js`. + - In dev, use the built script path in the workspace; in prod, resolve via `app.getAppPath()` + `dist/main/terminal-host.js` equivalent. +3. Preserve `terminalManager` interface: + - Refactor `apps/desktop/src/main/lib/terminal/manager.ts` into a thin adapter that: + - keeps the existing EventEmitter (`data:`, `exit:`) + - delegates operations to `TerminalHostClient` + - no longer spawns `node-pty` directly (that code moves into daemon). +4. Update TRPC router: + - `apps/desktop/src/lib/trpc/routers/terminal/terminal.ts` should continue to work with the same calls, but `createOrAttach` must return the daemon snapshot payload. + - Add a backwards-compatible response shape by adding optional fields rather than breaking existing ones, then migrate renderer. + +Exit criteria / proof: + +- `bun dev` for Desktop works; opening a terminal shows output; basic typing works. + +### Milestone 5: Renderer rehydration path (snapshot + mode restore + streaming) + +Goal: on attach, the renderer restores a perfect terminal state before streaming live output. + +Work to do: + +1. Update `apps/desktop/src/renderer/.../Terminal/Terminal.tsx`: + - Replace “write `result.scrollback`” with: + - apply `result.rehydrateSequences` first (these are control sequences that update xterm mode state) + - apply `result.snapshotAnsi` next + - only then enable subscription consumption (`subscriptionEnabled = true`) and flush queued events. +2. Ensure user input is sent unchanged: + - Keep using `xterm.onData` and send to backend via TRPC `write`. + - This includes query responses; daemon must ignore responses while attached (per Milestone 3). +3. Handle resize: + - On resize, send `resize` to daemon; daemon resizes PTY and also updates emulator dimensions. +4. Recovery UI: + - If attach fails due to daemon mismatch or missing session, show a small UI affordance: + - “Session ended” (if PTY exited) + - “Restart terminal” (creates new session) + +Exit criteria / proof: + +- Manual acceptance: pick a TUI, quit app, reopen, resume and immediately interact with correct behavior. + +### Milestone 6: Persistence setting + quit/update behavior + “stop daemon” control + +Goal: make persistence user-controlled, safe by default, and compatible with auto-update install flow. + +Work to do: + +1. Local DB settings: + - Add to local DB schema (`packages/local-db/src/schema/schema.ts`): + - `terminalPersistenceEnabled` boolean (default: false) + - `terminalScrollbackLines` integer (default: 10000, range: 1000–100000) + - `terminalDiskBufferMb` integer (default: 4, range: 1–32) + - Expose via settings TRPC router (`apps/desktop/src/lib/trpc/routers/settings/index.ts`) with optimistic UI patterns consistent with existing settings. +2. Behavior settings UI: + - Add under behavior settings in the renderer: + - Toggle: "Enable terminal persistence" (default off) — Keep terminal sessions alive when Superset is closed + - Number input: "Scrollback lines" (default 10000) — Lines of history kept per terminal + - Number input: "Disk buffer per terminal" (default 4 MB) — Output captured while app is closed + - Add an explicit button: "Stop background terminal sessions": + - Calls daemon `killAll` and stops daemon (or marks it idle and allows exit). +3. App quit behavior: + - When persistence is enabled, do not kill sessions on quit. The app should simply detach/disconnect. + - When persistence is disabled, keep the current behavior (cleanup kills PTYs). +4. Auto-update install behavior: + - Ensure the “install update” path does not kill sessions even if it triggers a forced quit. + +Exit criteria / proof: + +- Toggle on → sessions survive quit/reopen. +- Toggle off → quitting kills sessions (existing behavior). +- Update install flow (manual) does not kill sessions. + +### Milestone 7: Hardening, tests, and future-proofing (Windows) + +Goal: reduce operational risk and lay groundwork for Windows. + +Work to do: + +1. Orphan cleanup: + - On app start, compare current panes (from app state) with daemon sessions; kill sessions not referenced after a grace period. +2. Crash recovery: + - If daemon crashes, main should detect and show “sessions lost; restart terminal” rather than hanging. +3. Protocol compatibility: + - Establish a stable protocol version (`protocolVersion: 1`) and enforce additive changes only. + - Add a compatibility test that simulates missing optional fields. +4. Windows groundwork (no implementation yet): + - Abstract socket path selection so future named pipe support can be plugged in without rewriting the daemon. + - Identify the Windows-specific risks (ConPTY differences, process detachment semantics) and document them in-code. + +Exit criteria / proof: + +- `cd apps/desktop && bun test` passes. +- Manual acceptance checklist completed and recorded in PR description (not in this ExecPlan). + +## Concrete Steps + +All commands are from repo root unless stated otherwise. + +1. Create work branch: + + - `cd /Users/andreasasprou/Documents/superset` + - `git checkout -b feat/terminal-host-daemon origin/main` + +2. Run Desktop tests while iterating: + + - `cd apps/desktop` + - `bun test` + + Expected: existing tests pass; new tests added by this plan should fail before their implementation and pass after. + +3. Run Desktop dev build: + + - `cd /Users/andreasasprou/Documents/superset` + - `bun dev` + + Expected: Electron app launches; terminals function. + +4. Manual persistence demo (post-implementation): + + - Enable persistence toggle in Settings → Behavior. + - Open a terminal pane and run one of the target AI agents: `opencode`, `claude`, or `codex`. + - Interact with the agent (start a conversation, let it generate code). + - Quit the app (Cmd+Q). + - Reopen the app and verify: + - Screen content matches pre-quit state exactly. + - Cursor is in correct position. + - Arrow keys work correctly (not printing escape codes). + - Can immediately continue interacting without redraw. + - While app is closed, optionally run a command that prints periodically (e.g. `watch date`) and confirm it progressed when reattached. + +## Validation and Acceptance + +Acceptance is met when all of the following are true: + +1. Persistence disabled (default): quitting Superset kills terminal sessions (current behavior). +2. Persistence enabled: terminal sessions survive app quit/reopen; output continues to be captured while app is closed. +3. Perfect TUI resume: the following AI coding agents resume with correct screen state and correct interactive input semantics immediately on reopen: + - **opencode** + - **claude code** (Anthropic's Claude CLI) + - **codex** (OpenAI Codex CLI) +4. Update survival: using the in-app update install flow does not kill persistent sessions; reopening the updated app can attach to existing sessions. +5. Automated tests exist for the headless snapshot round-trip and pass in CI-equivalent `bun test` runs. + +## Idempotence and Recovery + +This plan should be safe to apply incrementally: + +- Each milestone adds functionality behind stable interfaces and can be rerun. +- Socket + token files under `SUPERSET_HOME_DIR` must be created with safe permissions and should not be overwritten unexpectedly. If regeneration is needed (e.g. token compromised), provide an explicit “reset daemon” action and document it. +- If the daemon fails to start or protocol mismatch occurs, the app must fail gracefully: show a recoverable error and allow “Restart terminal” (non-persistent) rather than hanging. + +Rollback strategy (if needed): + +- Keep the old in-process `TerminalManager` path behind a feature flag during migration (temporary). +- If daemon integration is unstable, disable the persistence toggle and fall back to in-process PTY ownership. + +## Artifacts and Notes + +When implementing, capture short evidence snippets here (examples, not code fences): + +- Example of successful daemon handshake log output. +- Example of a snapshot payload size and attach timing. +- Example of a TUI resume manual checklist with timestamps. + +## Interfaces and Dependencies + +### New dependencies (Desktop app) + +In `apps/desktop/package.json`, add: + +- `@xterm/headless` (Node-only headless emulator in daemon) + +Reuse existing: + +- `@xterm/addon-serialize` (snapshot generation) +- `node-pty` (PTY spawning in daemon) + +### Required modules and types + +Create `apps/desktop/src/main/lib/terminal-host/types.ts` with stable protocol shapes: + + export interface TerminalHostHelloRequest { token: string; protocolVersion: 1 } + export interface TerminalHostHelloResponse { protocolVersion: 1; daemonVersion: string } + + export interface AttachResult { + snapshotAnsi: string; + rehydrateSequences: string; + cwd: string | null; + } + + export type TerminalHostRequest = + | { type: "hello"; payload: TerminalHostHelloRequest } + | { type: "createOrAttach"; payload: { sessionId: string; cols: number; rows: number; cwd?: string; env?: Record } } + | { type: "write"; payload: { sessionId: string; data: string } } + | { type: "resize"; payload: { sessionId: string; cols: number; rows: number } } + | { type: "detach"; payload: { sessionId: string } } + | { type: "kill"; payload: { sessionId: string } } + | { type: "killAll"; payload: {} }; + +Daemon must implement these and keep them backwards compatible (additive changes only). + +### Main process integration points + +Files that will change: + +- `apps/desktop/electron.vite.config.ts` (build daemon entry) +- `apps/desktop/src/main/index.ts` (quit behavior based on setting; ensure daemon survival on quit/update) +- `apps/desktop/src/main/lib/terminal/manager.ts` (delegate to daemon client) +- `apps/desktop/src/lib/trpc/routers/terminal/terminal.ts` (return snapshot payload; stream from daemon) +- `apps/desktop/src/renderer/.../Terminal/Terminal.tsx` (apply snapshot/rehydrate) +- `packages/local-db/src/schema/schema.ts` and migrations (new setting) +- `apps/desktop/src/lib/trpc/routers/settings/index.ts` + renderer settings UI (toggle + “stop daemon”) + +Windows future: + +- Design IPC so it can swap UDS for named pipes without changing higher-level interfaces. + diff --git a/apps/desktop/electron.vite.config.ts b/apps/desktop/electron.vite.config.ts index 2ce99bdabed..64a0e3801e7 100644 --- a/apps/desktop/electron.vite.config.ts +++ b/apps/desktop/electron.vite.config.ts @@ -98,12 +98,17 @@ export default defineConfig({ "process.env.NEXT_PUBLIC_POSTHOG_HOST": JSON.stringify( process.env.NEXT_PUBLIC_POSTHOG_HOST, ), + // Terminal daemon mode - for terminal session persistence + "process.env.SUPERSET_TERMINAL_DAEMON": JSON.stringify( + process.env.SUPERSET_TERMINAL_DAEMON || "", + ), }, build: { rollupOptions: { input: { index: resolve("src/main/index.ts"), + "terminal-host": resolve("src/main/terminal-host/index.ts"), }, output: { dir: resolve(devPath, "main"), diff --git a/apps/desktop/package.json b/apps/desktop/package.json index 978a383ab50..8975c374a69 100644 --- a/apps/desktop/package.json +++ b/apps/desktop/package.json @@ -64,6 +64,7 @@ "@xterm/addon-unicode11": "^0.8.0", "@xterm/addon-web-links": "^0.11.0", "@xterm/addon-webgl": "^0.18.0", + "@xterm/headless": "^5.5.0", "@xterm/xterm": "^5.5.0", "better-sqlite3": "12.5.0", "bindings": "^1.5.0", diff --git a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts index 725c4592d80..fb783f42caa 100644 --- a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts +++ b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts @@ -4,7 +4,7 @@ import { projects, workspaces, worktrees } from "@superset/local-db"; import { observable } from "@trpc/server/observable"; import { eq } from "drizzle-orm"; import { localDb } from "main/lib/local-db"; -import { terminalManager } from "main/lib/terminal"; +import { getActiveTerminalManager } from "main/lib/terminal"; import { z } from "zod"; import { publicProcedure, router } from "../.."; import { getWorkspacePath } from "../workspaces/utils/worktree"; @@ -25,6 +25,9 @@ import { resolveCwd } from "./utils"; * - SUPERSET_PORT: The hooks server port for agent completion notifications */ export const createTerminalRouter = () => { + // Get the active terminal manager (in-process or daemon-based) + const terminalManager = getActiveTerminalManager(); + return router({ createOrAttach: publicProcedure .input( @@ -87,6 +90,8 @@ export const createTerminalRouter = () => { isNew: result.isNew, scrollback: result.scrollback, wasRecovered: result.wasRecovered, + // Include snapshot for daemon mode (renderer can use for rehydration) + snapshot: result.snapshot, }; }), diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts new file mode 100644 index 00000000000..5407a385d72 --- /dev/null +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -0,0 +1,611 @@ +/** + * Terminal Host Daemon Client + * + * Client library for the Electron main process to communicate with + * the terminal host daemon. Handles: + * - Daemon lifecycle (spawning if not running) + * - Socket connection and reconnection + * - Request/response framing + * - Event streaming + */ + +import { spawn } from "node:child_process"; +import { EventEmitter } from "node:events"; +import { existsSync, readFileSync, unlinkSync } from "node:fs"; +import { connect, type Socket } from "node:net"; +import { homedir } from "node:os"; +import { join } from "node:path"; +import { app } from "electron"; +import { + type ClearScrollbackRequest, + type CreateOrAttachRequest, + type CreateOrAttachResponse, + type DetachRequest, + type EmptyResponse, + type HelloResponse, + type IpcErrorResponse, + type IpcEvent, + type IpcResponse, + type IpcSuccessResponse, + type KillAllRequest, + type KillRequest, + type ListSessionsResponse, + PROTOCOL_VERSION, + type ResizeRequest, + type TerminalDataEvent, + type TerminalExitEvent, + type WriteRequest, +} from "./types"; + +// ============================================================================= +// Configuration +// ============================================================================= + +const SUPERSET_DIR_NAME = + process.env.NODE_ENV === "development" ? ".superset-dev" : ".superset"; +const SUPERSET_HOME_DIR = join(homedir(), SUPERSET_DIR_NAME); + +const SOCKET_PATH = join(SUPERSET_HOME_DIR, "terminal-host.sock"); +const TOKEN_PATH = join(SUPERSET_HOME_DIR, "terminal-host.token"); +const PID_PATH = join(SUPERSET_HOME_DIR, "terminal-host.pid"); + +// Connection timeouts +const CONNECT_TIMEOUT_MS = 5000; +const SPAWN_WAIT_MS = 2000; +const REQUEST_TIMEOUT_MS = 30000; + +// ============================================================================= +// NDJSON Parser +// ============================================================================= + +class NdjsonParser { + private buffer = ""; + + parse(chunk: string): Array { + this.buffer += chunk; + const messages: Array = []; + + let newlineIndex = this.buffer.indexOf("\n"); + while (newlineIndex !== -1) { + const line = this.buffer.slice(0, newlineIndex); + this.buffer = this.buffer.slice(newlineIndex + 1); + + if (line.trim()) { + try { + messages.push(JSON.parse(line)); + } catch { + console.warn("[TerminalHostClient] Failed to parse NDJSON line"); + } + } + + newlineIndex = this.buffer.indexOf("\n"); + } + + return messages; + } +} + +// ============================================================================= +// Pending Request Tracker +// ============================================================================= + +interface PendingRequest { + resolve: (value: unknown) => void; + reject: (error: Error) => void; + timeoutId: NodeJS.Timeout; +} + +// ============================================================================= +// TerminalHostClient +// ============================================================================= + +export interface TerminalHostClientEvents { + data: (sessionId: string, data: string) => void; + exit: (sessionId: string, exitCode: number, signal?: number) => void; + connected: () => void; + disconnected: () => void; + error: (error: Error) => void; +} + +/** + * Client for communicating with the terminal host daemon. + * Emits events for terminal data and exit. + */ +export class TerminalHostClient extends EventEmitter { + private socket: Socket | null = null; + private parser = new NdjsonParser(); + private pendingRequests = new Map(); + private requestCounter = 0; + private authenticated = false; + private connecting = false; + private disposed = false; + + // =========================================================================== + // Connection Management + // =========================================================================== + + /** + * Ensure we have a connected, authenticated socket. + * Spawns daemon if needed. + */ + async ensureConnected(): Promise { + if (this.socket && this.authenticated) { + console.log("[TerminalHostClient] Already connected and authenticated"); + return; + } + + if (this.connecting) { + console.log( + "[TerminalHostClient] Connection already in progress, waiting...", + ); + // Wait for existing connection attempt + return new Promise((resolve, reject) => { + const checkConnection = () => { + if (this.socket && this.authenticated) { + resolve(); + } else if (!this.connecting) { + reject(new Error("Connection failed")); + } else { + setTimeout(checkConnection, 100); + } + }; + checkConnection(); + }); + } + + this.connecting = true; + console.log("[TerminalHostClient] Connecting to daemon..."); + + try { + // Try to connect to existing daemon + let connected = await this.tryConnect(); + console.log( + `[TerminalHostClient] Initial connection attempt: ${connected ? "SUCCESS" : "FAILED"}`, + ); + + if (!connected) { + // Spawn daemon and retry + console.log("[TerminalHostClient] Spawning daemon..."); + await this.spawnDaemon(); + connected = await this.tryConnect(); + console.log( + `[TerminalHostClient] Post-spawn connection attempt: ${connected ? "SUCCESS" : "FAILED"}`, + ); + + if (!connected) { + throw new Error("Failed to connect to daemon after spawn"); + } + } + + // Authenticate + console.log("[TerminalHostClient] Authenticating..."); + await this.authenticate(); + console.log("[TerminalHostClient] Authentication successful!"); + } finally { + this.connecting = false; + } + } + + /** + * Try to connect to the daemon socket. + * Returns true if connected, false if daemon not running. + */ + private async tryConnect(): Promise { + return new Promise((resolve) => { + if (!existsSync(SOCKET_PATH)) { + resolve(false); + return; + } + + const socket = connect(SOCKET_PATH); + let resolved = false; + + const timeout = setTimeout(() => { + if (!resolved) { + resolved = true; + socket.destroy(); + resolve(false); + } + }, CONNECT_TIMEOUT_MS); + + socket.on("connect", () => { + if (!resolved) { + resolved = true; + clearTimeout(timeout); + this.socket = socket; + this.setupSocketHandlers(); + resolve(true); + } + }); + + socket.on("error", () => { + if (!resolved) { + resolved = true; + clearTimeout(timeout); + resolve(false); + } + }); + }); + } + + /** + * Set up socket event handlers + */ + private setupSocketHandlers(): void { + if (!this.socket) return; + + this.socket.setEncoding("utf-8"); + + this.socket.on("data", (data: string) => { + const messages = this.parser.parse(data); + for (const message of messages) { + this.handleMessage(message); + } + }); + + this.socket.on("close", () => { + this.handleDisconnect(); + }); + + this.socket.on("error", (error) => { + this.emit("error", error); + this.handleDisconnect(); + }); + } + + /** + * Handle incoming message (response or event) + */ + private handleMessage(message: IpcResponse | IpcEvent): void { + if ("id" in message) { + // Response to a request + const pending = this.pendingRequests.get(message.id); + if (pending) { + this.pendingRequests.delete(message.id); + clearTimeout(pending.timeoutId); + + if (message.ok) { + pending.resolve((message as IpcSuccessResponse).payload); + } else { + const error = (message as IpcErrorResponse).error; + pending.reject(new Error(`${error.code}: ${error.message}`)); + } + } + } else if (message.type === "event") { + // Event from daemon + const event = message as IpcEvent; + const payload = event.payload as TerminalDataEvent | TerminalExitEvent; + + if (payload.type === "data") { + this.emit("data", event.sessionId, (payload as TerminalDataEvent).data); + } else if (payload.type === "exit") { + const exitPayload = payload as TerminalExitEvent; + this.emit( + "exit", + event.sessionId, + exitPayload.exitCode, + exitPayload.signal, + ); + } + } + } + + /** + * Handle socket disconnect + */ + private handleDisconnect(): void { + this.socket = null; + this.authenticated = false; + + // Reject all pending requests + for (const [id, pending] of this.pendingRequests.entries()) { + clearTimeout(pending.timeoutId); + pending.reject(new Error("Connection lost")); + this.pendingRequests.delete(id); + } + + this.emit("disconnected"); + } + + /** + * Authenticate with the daemon + */ + private async authenticate(): Promise { + if (!existsSync(TOKEN_PATH)) { + throw new Error("Auth token not found - daemon may not be running"); + } + + const token = readFileSync(TOKEN_PATH, "utf-8").trim(); + + const response = (await this.sendRequest("hello", { + token, + protocolVersion: PROTOCOL_VERSION, + })) as HelloResponse; + + if (response.protocolVersion !== PROTOCOL_VERSION) { + throw new Error( + `Protocol version mismatch: client=${PROTOCOL_VERSION}, daemon=${response.protocolVersion}`, + ); + } + + this.authenticated = true; + this.emit("connected"); + } + + // =========================================================================== + // Daemon Spawning + // =========================================================================== + + /** + * Spawn the daemon process if not running + */ + private async spawnDaemon(): Promise { + // Check if daemon is already running via PID file + if (this.isDaemonRunning()) { + console.log( + "[TerminalHostClient] Daemon already running (PID file exists)", + ); + // Daemon is running but socket might be stale + // Give it a moment and return + await this.sleep(500); + return; + } + + // Clean up stale socket file if it exists + if (existsSync(SOCKET_PATH)) { + console.log("[TerminalHostClient] Removing stale socket file"); + try { + unlinkSync(SOCKET_PATH); + } catch { + // Ignore - might not have permission + } + } + + // Get path to daemon script + const daemonScript = this.getDaemonScriptPath(); + console.log(`[TerminalHostClient] Daemon script path: ${daemonScript}`); + console.log( + `[TerminalHostClient] Script exists: ${existsSync(daemonScript)}`, + ); + + if (!existsSync(daemonScript)) { + throw new Error(`Daemon script not found: ${daemonScript}`); + } + + console.log( + `[TerminalHostClient] Spawning daemon with execPath: ${process.execPath}`, + ); + + // Spawn daemon as detached process + const child = spawn(process.execPath, [daemonScript], { + detached: true, + stdio: "ignore", + env: { + ...process.env, + ELECTRON_RUN_AS_NODE: "1", + NODE_ENV: process.env.NODE_ENV, + }, + }); + + console.log(`[TerminalHostClient] Daemon spawned with PID: ${child.pid}`); + + // Unref to allow parent to exit independently + child.unref(); + + // Wait for daemon to start + console.log("[TerminalHostClient] Waiting for daemon to start..."); + await this.waitForDaemon(); + console.log("[TerminalHostClient] Daemon started successfully"); + } + + /** + * Check if daemon process is running + */ + private isDaemonRunning(): boolean { + if (!existsSync(PID_PATH)) { + return false; + } + + try { + const pid = Number.parseInt(readFileSync(PID_PATH, "utf-8").trim(), 10); + // Check if process exists (kill with signal 0) + process.kill(pid, 0); + return true; + } catch { + // Process doesn't exist or no permission + return false; + } + } + + /** + * Get path to daemon script + */ + private getDaemonScriptPath(): string { + if (app.isPackaged) { + // Production: script is in app resources + return join(app.getAppPath(), "dist", "main", "terminal-host.js"); + } + + // Development: electron-vite outputs to dist/main/ + const appPath = app.getAppPath(); + return join(appPath, "dist", "main", "terminal-host.js"); + } + + /** + * Wait for daemon to be ready + */ + private async waitForDaemon(): Promise { + const startTime = Date.now(); + + while (Date.now() - startTime < SPAWN_WAIT_MS) { + if (existsSync(SOCKET_PATH)) { + // Give it a moment to start listening + await this.sleep(200); + return; + } + await this.sleep(100); + } + + throw new Error("Daemon failed to start in time"); + } + + private sleep(ms: number): Promise { + return new Promise((resolve) => setTimeout(resolve, ms)); + } + + // =========================================================================== + // Request/Response + // =========================================================================== + + /** + * Send a request to the daemon and wait for response + */ + private sendRequest(type: string, payload: unknown): Promise { + return new Promise((resolve, reject) => { + if (!this.socket) { + reject(new Error("Not connected")); + return; + } + + const id = `req_${++this.requestCounter}`; + + const timeoutId = setTimeout(() => { + this.pendingRequests.delete(id); + reject(new Error(`Request timeout: ${type}`)); + }, REQUEST_TIMEOUT_MS); + + this.pendingRequests.set(id, { resolve, reject, timeoutId }); + + const message = `${JSON.stringify({ id, type, payload })}\n`; + this.socket.write(message); + }); + } + + // =========================================================================== + // Public API + // =========================================================================== + + /** + * Create or attach to a terminal session + */ + async createOrAttach( + request: CreateOrAttachRequest, + ): Promise { + await this.ensureConnected(); + return (await this.sendRequest( + "createOrAttach", + request, + )) as CreateOrAttachResponse; + } + + /** + * Write data to a terminal session + */ + async write(request: WriteRequest): Promise { + await this.ensureConnected(); + return (await this.sendRequest("write", request)) as EmptyResponse; + } + + /** + * Resize a terminal session + */ + async resize(request: ResizeRequest): Promise { + await this.ensureConnected(); + return (await this.sendRequest("resize", request)) as EmptyResponse; + } + + /** + * Detach from a terminal session + */ + async detach(request: DetachRequest): Promise { + await this.ensureConnected(); + return (await this.sendRequest("detach", request)) as EmptyResponse; + } + + /** + * Kill a terminal session + */ + async kill(request: KillRequest): Promise { + await this.ensureConnected(); + return (await this.sendRequest("kill", request)) as EmptyResponse; + } + + /** + * Kill all terminal sessions + */ + async killAll(request: KillAllRequest): Promise { + await this.ensureConnected(); + return (await this.sendRequest("killAll", request)) as EmptyResponse; + } + + /** + * List all sessions + */ + async listSessions(): Promise { + await this.ensureConnected(); + return (await this.sendRequest( + "listSessions", + undefined, + )) as ListSessionsResponse; + } + + /** + * Clear scrollback for a session + */ + async clearScrollback( + request: ClearScrollbackRequest, + ): Promise { + await this.ensureConnected(); + return (await this.sendRequest( + "clearScrollback", + request, + )) as EmptyResponse; + } + + /** + * Disconnect from daemon (but don't stop it) + */ + disconnect(): void { + if (this.socket) { + this.socket.destroy(); + this.socket = null; + } + this.authenticated = false; + } + + /** + * Dispose of the client + */ + dispose(): void { + if (this.disposed) return; + this.disposed = true; + this.disconnect(); + this.removeAllListeners(); + } +} + +// ============================================================================= +// Singleton Instance +// ============================================================================= + +let clientInstance: TerminalHostClient | null = null; + +/** + * Get the singleton terminal host client instance + */ +export function getTerminalHostClient(): TerminalHostClient { + if (!clientInstance) { + clientInstance = new TerminalHostClient(); + } + return clientInstance; +} + +/** + * Dispose of the singleton client + */ +export function disposeTerminalHostClient(): void { + if (clientInstance) { + clientInstance.dispose(); + clientInstance = null; + } +} diff --git a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts new file mode 100644 index 00000000000..d9f432b6b9d --- /dev/null +++ b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts @@ -0,0 +1,437 @@ +/** + * Headless Terminal Emulator + * + * Wraps @xterm/headless with: + * - Mode tracking (DECSET/DECRST parsing) + * - Snapshot generation via @xterm/addon-serialize + * - Rehydration sequence generation for mode restoration + */ + +import { SerializeAddon } from "@xterm/addon-serialize"; +import { Terminal } from "@xterm/headless"; +import { + DEFAULT_MODES, + type TerminalModes, + type TerminalSnapshot, +} from "./types"; + +// ============================================================================= +// Mode Tracking Constants +// ============================================================================= + +// Escape character +const ESC = "\x1b"; +const BEL = "\x07"; + +/** + * DECSET/DECRST mode numbers we track + */ +const MODE_MAP: Record = { + 1: "applicationCursorKeys", + 6: "originMode", + 7: "autoWrap", + 9: "mouseTrackingX10", + 25: "cursorVisible", + 47: "alternateScreen", // Legacy alternate screen + 1000: "mouseTrackingNormal", + 1001: "mouseTrackingHighlight", + 1002: "mouseTrackingButtonEvent", + 1003: "mouseTrackingAnyEvent", + 1004: "focusReporting", + 1005: "mouseUtf8", + 1006: "mouseSgr", + 1049: "alternateScreen", // Modern alternate screen with save/restore + 2004: "bracketedPaste", +}; + +// ============================================================================= +// Headless Emulator Class +// ============================================================================= + +export interface HeadlessEmulatorOptions { + cols?: number; + rows?: number; + scrollback?: number; +} + +export class HeadlessEmulator { + private terminal: Terminal; + private serializeAddon: SerializeAddon; + private modes: TerminalModes; + private cwd: string | null = null; + private disposed = false; + + // Pending output buffer for query responses + private pendingOutput: string[] = []; + private onDataCallback?: (data: string) => void; + + constructor(options: HeadlessEmulatorOptions = {}) { + const { cols = 80, rows = 24, scrollback = 10000 } = options; + + this.terminal = new Terminal({ + cols, + rows, + scrollback, + allowProposedApi: true, + }); + + this.serializeAddon = new SerializeAddon(); + this.terminal.loadAddon(this.serializeAddon); + + // Initialize mode state + this.modes = { ...DEFAULT_MODES }; + + // Listen for terminal output (query responses) + this.terminal.onData((data) => { + this.pendingOutput.push(data); + this.onDataCallback?.(data); + }); + } + + /** + * Set callback for terminal-generated output (query responses) + */ + onData(callback: (data: string) => void): void { + this.onDataCallback = callback; + } + + /** + * Get and clear pending output (query responses) + */ + flushPendingOutput(): string[] { + const output = this.pendingOutput; + this.pendingOutput = []; + return output; + } + + /** + * Write data to the terminal emulator (synchronous, non-blocking) + * Data is buffered and will be processed asynchronously. + * Use writeSync() if you need to wait for the write to complete. + */ + write(data: string): void { + if (this.disposed) return; + + // Parse for mode changes before writing to terminal + this.parseModeChanges(data); + + // Parse for OSC-7 (CWD) sequences + this.parseOsc7(data); + + // Write to headless terminal (buffered/async) + this.terminal.write(data); + } + + /** + * Write data to the terminal emulator and wait for completion. + * Use this when you need to ensure data is processed before reading state. + */ + async writeSync(data: string): Promise { + if (this.disposed) return; + + // Parse for mode changes before writing to terminal + this.parseModeChanges(data); + + // Parse for OSC-7 (CWD) sequences + this.parseOsc7(data); + + // Write to headless terminal and wait for completion + return new Promise((resolve) => { + this.terminal.write(data, () => resolve()); + }); + } + + /** + * Resize the terminal + */ + resize(cols: number, rows: number): void { + if (this.disposed) return; + this.terminal.resize(cols, rows); + } + + /** + * Get current terminal dimensions + */ + getDimensions(): { cols: number; rows: number } { + return { + cols: this.terminal.cols, + rows: this.terminal.rows, + }; + } + + /** + * Get current terminal modes + */ + getModes(): TerminalModes { + return { ...this.modes }; + } + + /** + * Get current working directory (from OSC-7) + */ + getCwd(): string | null { + return this.cwd; + } + + /** + * Set CWD directly (for initial session setup) + */ + setCwd(cwd: string): void { + this.cwd = cwd; + } + + /** + * Get scrollback line count + */ + getScrollbackLines(): number { + return this.terminal.buffer.active.length; + } + + /** + * Flush all pending writes to the terminal. + * Call this before getSnapshot() if you've written data without waiting. + */ + async flush(): Promise { + if (this.disposed) return; + // Write an empty string with callback to ensure all pending writes are processed + return new Promise((resolve) => { + this.terminal.write("", () => resolve()); + }); + } + + /** + * Generate a complete snapshot for session restore. + * Note: Call flush() first if you have pending async writes. + */ + getSnapshot(): TerminalSnapshot { + const snapshotAnsi = this.serializeAddon.serialize({ + scrollback: this.terminal.options.scrollback ?? 10000, + }); + + const rehydrateSequences = this.generateRehydrateSequences(); + + return { + snapshotAnsi, + rehydrateSequences, + cwd: this.cwd, + modes: { ...this.modes }, + cols: this.terminal.cols, + rows: this.terminal.rows, + scrollbackLines: this.getScrollbackLines(), + }; + } + + /** + * Generate a complete snapshot after flushing pending writes. + * This is the preferred method for getting consistent snapshots. + */ + async getSnapshotAsync(): Promise { + await this.flush(); + return this.getSnapshot(); + } + + /** + * Clear terminal buffer + */ + clear(): void { + if (this.disposed) return; + this.terminal.clear(); + } + + /** + * Reset terminal to default state + */ + reset(): void { + if (this.disposed) return; + this.terminal.reset(); + this.modes = { ...DEFAULT_MODES }; + } + + /** + * Dispose of the terminal + */ + dispose(): void { + if (this.disposed) return; + this.disposed = true; + this.terminal.dispose(); + } + + // =========================================================================== + // Private Methods + // =========================================================================== + + /** + * Parse DECSET/DECRST sequences from terminal data + */ + private parseModeChanges(data: string): void { + // Match CSI ? Pm h (DECSET) and CSI ? Pm l (DECRST) + // Examples: ESC[?1h (enable app cursor), ESC[?2004l (disable bracketed paste) + // Also handles multiple modes: ESC[?1;2004h + // Using string-based regex to avoid control character linter errors + const modeRegex = new RegExp( + `${escapeRegex(ESC)}\\[\\?([0-9;]+)([hl])`, + "g", + ); + + for (const match of data.matchAll(modeRegex)) { + const modesStr = match[1]; + const action = match[2]; // 'h' = set (enable), 'l' = reset (disable) + const enable = action === "h"; + + // Split on semicolons for multiple modes + const modeNumbers = modesStr + .split(";") + .map((s) => Number.parseInt(s, 10)); + + for (const modeNum of modeNumbers) { + const modeName = MODE_MAP[modeNum]; + if (modeName) { + // For cursor visibility and auto-wrap, 'h' means true, 'l' means false + // But their defaults are different (cursorVisible=true, autoWrap=true) + this.modes[modeName] = enable; + } + } + } + } + + /** + * Parse OSC-7 sequences for CWD tracking + * Format: ESC]7;file://hostname/path BEL or ESC]7;file://hostname/path ESC\ + * + * The path part starts after the hostname (after file://hostname). + * Hostname can be empty, localhost, or a machine name. + */ + private parseOsc7(data: string): void { + // OSC-7 format: \x1b]7;file://hostname/path\x07 + // We need to extract the /path portion after the hostname + // Hostname ends at the first / after file:// + + // Pattern explanation: + // - ESC ]7;file:// - the OSC-7 prefix + // - [^/]* - the hostname (anything that's not a slash) + // - (/.+?) - capture the path (starts with /, non-greedy) + // - (?:BEL|ESC\\) - terminated by BEL or ST + + // Using string building to avoid control character linter issues + const escEscaped = escapeRegex(ESC); + const belEscaped = escapeRegex(BEL); + + // Match OSC-7 with either terminator + const osc7Pattern = `${escEscaped}\\]7;file://[^/]*(/.+?)(?:${belEscaped}|${escEscaped}\\\\)`; + const osc7Regex = new RegExp(osc7Pattern, "g"); + + for (const match of data.matchAll(osc7Regex)) { + if (match[1]) { + try { + this.cwd = decodeURIComponent(match[1]); + } catch { + // If decoding fails, use the raw path + this.cwd = match[1]; + } + } + } + } + + /** + * Generate escape sequences to restore current mode state + * These sequences should be written to a fresh xterm instance before + * writing the snapshot to ensure input behavior matches. + */ + private generateRehydrateSequences(): string { + const sequences: string[] = []; + + // Helper to add DECSET/DECRST sequence + const addModeSequence = ( + modeNum: number, + enabled: boolean, + defaultEnabled: boolean, + ) => { + // Only add sequence if different from default + if (enabled !== defaultEnabled) { + sequences.push(`${ESC}[?${modeNum}${enabled ? "h" : "l"}`); + } + }; + + // Application cursor keys (mode 1) + addModeSequence(1, this.modes.applicationCursorKeys, false); + + // Origin mode (mode 6) + addModeSequence(6, this.modes.originMode, false); + + // Auto-wrap mode (mode 7) + addModeSequence(7, this.modes.autoWrap, true); + + // Cursor visibility (mode 25) + addModeSequence(25, this.modes.cursorVisible, true); + + // Mouse tracking modes (mutually exclusive typically, but we track all) + addModeSequence(9, this.modes.mouseTrackingX10, false); + addModeSequence(1000, this.modes.mouseTrackingNormal, false); + addModeSequence(1001, this.modes.mouseTrackingHighlight, false); + addModeSequence(1002, this.modes.mouseTrackingButtonEvent, false); + addModeSequence(1003, this.modes.mouseTrackingAnyEvent, false); + + // Mouse encoding modes + addModeSequence(1005, this.modes.mouseUtf8, false); + addModeSequence(1006, this.modes.mouseSgr, false); + + // Focus reporting (mode 1004) + addModeSequence(1004, this.modes.focusReporting, false); + + // Bracketed paste (mode 2004) + addModeSequence(2004, this.modes.bracketedPaste, false); + + // Note: We don't restore alternate screen mode (1049/47) here because + // the serialized snapshot already contains the correct screen buffer. + // Restoring it would cause incorrect behavior. + + return sequences.join(""); + } +} + +// ============================================================================= +// Utility Functions +// ============================================================================= + +/** + * Escape special regex characters in a string + */ +function escapeRegex(str: string): string { + return str.replace(/[.*+?^${}()|[\]\\]/g, "\\$&"); +} + +/** + * Apply a snapshot to a headless emulator (for testing round-trip) + */ +export function applySnapshot( + emulator: HeadlessEmulator, + snapshot: TerminalSnapshot, +): void { + // First, write the rehydrate sequences to restore mode state + emulator.write(snapshot.rehydrateSequences); + + // Then write the serialized screen content + emulator.write(snapshot.snapshotAnsi); +} + +/** + * Compare two mode states for equality + */ +export function modesEqual(a: TerminalModes, b: TerminalModes): boolean { + return ( + a.applicationCursorKeys === b.applicationCursorKeys && + a.bracketedPaste === b.bracketedPaste && + a.mouseTrackingX10 === b.mouseTrackingX10 && + a.mouseTrackingNormal === b.mouseTrackingNormal && + a.mouseTrackingHighlight === b.mouseTrackingHighlight && + a.mouseTrackingButtonEvent === b.mouseTrackingButtonEvent && + a.mouseTrackingAnyEvent === b.mouseTrackingAnyEvent && + a.focusReporting === b.focusReporting && + a.mouseUtf8 === b.mouseUtf8 && + a.mouseSgr === b.mouseSgr && + a.alternateScreen === b.alternateScreen && + a.cursorVisible === b.cursorVisible && + a.originMode === b.originMode && + a.autoWrap === b.autoWrap + ); +} diff --git a/apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts b/apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts new file mode 100644 index 00000000000..c04e6a023f1 --- /dev/null +++ b/apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts @@ -0,0 +1,529 @@ +/** + * Headless Terminal Round-Trip Test + * + * This test proves that we can: + * 1. Feed terminal output into a headless emulator + * 2. Capture mode state changes (application cursor keys, bracketed paste, mouse tracking) + * 3. Serialize the terminal state + * 4. Apply that state to a fresh emulator + * 5. Verify the restored terminal has matching visual content and mode flags + * + * This is the foundational proof for "perfect resume" - the ability to restore + * terminal sessions across app restarts. + */ + +import { afterEach, beforeEach, describe, expect, test } from "bun:test"; +import { HeadlessEmulator, modesEqual } from "../headless-emulator"; +import { DEFAULT_MODES } from "../types"; + +// Escape sequences for testing +const ESC = "\x1b"; +const CSI = `${ESC}[`; +const OSC = `${ESC}]`; +const BEL = "\x07"; + +// Mode enable/disable sequences +const ENABLE_APP_CURSOR = `${CSI}?1h`; +const DISABLE_APP_CURSOR = `${CSI}?1l`; +const ENABLE_BRACKETED_PASTE = `${CSI}?2004h`; +const DISABLE_BRACKETED_PASTE = `${CSI}?2004l`; +const ENABLE_MOUSE_SGR = `${CSI}?1006h`; +const DISABLE_MOUSE_SGR = `${CSI}?1006l`; +const ENABLE_MOUSE_NORMAL = `${CSI}?1000h`; +const DISABLE_MOUSE_NORMAL = `${CSI}?1000l`; +const ENABLE_FOCUS_REPORTING = `${CSI}?1004h`; +const HIDE_CURSOR = `${CSI}?25l`; +const SHOW_CURSOR = `${CSI}?25h`; +const ENTER_ALT_SCREEN = `${CSI}?1049h`; +const EXIT_ALT_SCREEN = `${CSI}?1049l`; + +// Cursor movement +const MOVE_CURSOR = (row: number, col: number) => `${CSI}${row};${col}H`; +const CLEAR_SCREEN = `${CSI}2J`; + +// OSC-7 CWD reporting - format is file://hostname/path (path is NOT URL-encoded) +const OSC7_CWD = (path: string) => `${OSC}7;file://localhost${path}${BEL}`; + +describe("HeadlessEmulator", () => { + let emulator: HeadlessEmulator; + + beforeEach(() => { + emulator = new HeadlessEmulator({ cols: 80, rows: 24, scrollback: 1000 }); + }); + + afterEach(() => { + emulator.dispose(); + }); + + describe("basic functionality", () => { + test("should initialize with default modes", () => { + const modes = emulator.getModes(); + expect(modesEqual(modes, DEFAULT_MODES)).toBe(true); + }); + + test("should write text to terminal", async () => { + await emulator.writeSync("Hello, World!\r\n"); + const snapshot = emulator.getSnapshot(); + expect(snapshot.snapshotAnsi).toContain("Hello, World!"); + }); + + test("should track dimensions", () => { + const dims = emulator.getDimensions(); + expect(dims.cols).toBe(80); + expect(dims.rows).toBe(24); + }); + + test("should resize terminal", () => { + emulator.resize(120, 40); + const dims = emulator.getDimensions(); + expect(dims.cols).toBe(120); + expect(dims.rows).toBe(40); + }); + }); + + describe("mode tracking", () => { + test("should track application cursor keys mode", async () => { + expect(emulator.getModes().applicationCursorKeys).toBe(false); + + await emulator.writeSync(ENABLE_APP_CURSOR); + expect(emulator.getModes().applicationCursorKeys).toBe(true); + + await emulator.writeSync(DISABLE_APP_CURSOR); + expect(emulator.getModes().applicationCursorKeys).toBe(false); + }); + + test("should track bracketed paste mode", async () => { + expect(emulator.getModes().bracketedPaste).toBe(false); + + await emulator.writeSync(ENABLE_BRACKETED_PASTE); + expect(emulator.getModes().bracketedPaste).toBe(true); + + await emulator.writeSync(DISABLE_BRACKETED_PASTE); + expect(emulator.getModes().bracketedPaste).toBe(false); + }); + + test("should track mouse SGR mode", async () => { + expect(emulator.getModes().mouseSgr).toBe(false); + + await emulator.writeSync(ENABLE_MOUSE_SGR); + expect(emulator.getModes().mouseSgr).toBe(true); + + await emulator.writeSync(DISABLE_MOUSE_SGR); + expect(emulator.getModes().mouseSgr).toBe(false); + }); + + test("should track mouse normal tracking mode", async () => { + expect(emulator.getModes().mouseTrackingNormal).toBe(false); + + await emulator.writeSync(ENABLE_MOUSE_NORMAL); + expect(emulator.getModes().mouseTrackingNormal).toBe(true); + + await emulator.writeSync(DISABLE_MOUSE_NORMAL); + expect(emulator.getModes().mouseTrackingNormal).toBe(false); + }); + + test("should track focus reporting mode", async () => { + expect(emulator.getModes().focusReporting).toBe(false); + + await emulator.writeSync(ENABLE_FOCUS_REPORTING); + expect(emulator.getModes().focusReporting).toBe(true); + }); + + test("should track cursor visibility", async () => { + expect(emulator.getModes().cursorVisible).toBe(true); // Default is visible + + await emulator.writeSync(HIDE_CURSOR); + expect(emulator.getModes().cursorVisible).toBe(false); + + await emulator.writeSync(SHOW_CURSOR); + expect(emulator.getModes().cursorVisible).toBe(true); + }); + + test("should track alternate screen mode", async () => { + expect(emulator.getModes().alternateScreen).toBe(false); + + await emulator.writeSync(ENTER_ALT_SCREEN); + expect(emulator.getModes().alternateScreen).toBe(true); + + await emulator.writeSync(EXIT_ALT_SCREEN); + expect(emulator.getModes().alternateScreen).toBe(false); + }); + + test("should handle multiple modes in single sequence", async () => { + // Enable both app cursor and bracketed paste in one sequence + await emulator.writeSync(`${CSI}?1;2004h`); + + const modes = emulator.getModes(); + expect(modes.applicationCursorKeys).toBe(true); + expect(modes.bracketedPaste).toBe(true); + }); + }); + + describe("CWD tracking via OSC-7", () => { + test("should parse OSC-7 with BEL terminator", async () => { + expect(emulator.getCwd()).toBeNull(); + + await emulator.writeSync(OSC7_CWD("/Users/test/project")); + expect(emulator.getCwd()).toBe("/Users/test/project"); + }); + + test("should update CWD on directory change", async () => { + await emulator.writeSync(OSC7_CWD("/Users/test")); + expect(emulator.getCwd()).toBe("/Users/test"); + + await emulator.writeSync(OSC7_CWD("/Users/test/subdir")); + expect(emulator.getCwd()).toBe("/Users/test/subdir"); + }); + + test("should handle paths with spaces", async () => { + await emulator.writeSync(OSC7_CWD("/Users/test/my project")); + expect(emulator.getCwd()).toBe("/Users/test/my project"); + }); + }); + + describe("snapshot generation", () => { + test("should generate snapshot with screen content", async () => { + await emulator.writeSync("Line 1\r\nLine 2\r\nLine 3\r\n"); + + const snapshot = emulator.getSnapshot(); + + expect(snapshot.snapshotAnsi).toBeDefined(); + expect(snapshot.snapshotAnsi.length).toBeGreaterThan(0); + expect(snapshot.cols).toBe(80); + expect(snapshot.rows).toBe(24); + }); + + test("should include mode state in snapshot", async () => { + await emulator.writeSync(ENABLE_APP_CURSOR); + await emulator.writeSync(ENABLE_BRACKETED_PASTE); + await emulator.writeSync(ENABLE_MOUSE_SGR); + + const snapshot = emulator.getSnapshot(); + + expect(snapshot.modes.applicationCursorKeys).toBe(true); + expect(snapshot.modes.bracketedPaste).toBe(true); + expect(snapshot.modes.mouseSgr).toBe(true); + }); + + test("should include CWD in snapshot", async () => { + await emulator.writeSync(OSC7_CWD("/home/user/workspace")); + + const snapshot = emulator.getSnapshot(); + + expect(snapshot.cwd).toBe("/home/user/workspace"); + }); + + test("should generate rehydrate sequences for non-default modes", async () => { + await emulator.writeSync(ENABLE_APP_CURSOR); + await emulator.writeSync(ENABLE_BRACKETED_PASTE); + + const snapshot = emulator.getSnapshot(); + + // Rehydrate sequences should contain mode-setting escapes + expect(snapshot.rehydrateSequences).toContain("?1h"); // app cursor + expect(snapshot.rehydrateSequences).toContain("?2004h"); // bracketed paste + }); + + test("should not generate rehydrate sequences for default modes", async () => { + // Don't change any modes - use defaults + await emulator.writeSync("Some text\r\n"); + + const snapshot = emulator.getSnapshot(); + + // Should have empty or minimal rehydrate sequences + expect(snapshot.rehydrateSequences).toBe(""); + }); + }); +}); + +describe("Snapshot Round-Trip", () => { + test("should restore simple text content", async () => { + const source = new HeadlessEmulator({ cols: 80, rows: 24 }); + const target = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + // Write content to source + await source.writeSync("Hello, World!\r\n"); + await source.writeSync("This is line 2\r\n"); + await source.writeSync("And line 3\r\n"); + + // Get snapshot and apply to target + const snapshot = source.getSnapshot(); + await target.writeSync(snapshot.rehydrateSequences); + await target.writeSync(snapshot.snapshotAnsi); + + // Verify content matches + const targetSnapshot = target.getSnapshot(); + expect(targetSnapshot.snapshotAnsi).toContain("Hello, World!"); + expect(targetSnapshot.snapshotAnsi).toContain("This is line 2"); + expect(targetSnapshot.snapshotAnsi).toContain("And line 3"); + } finally { + source.dispose(); + target.dispose(); + } + }); + + test("should restore mode state", async () => { + const source = new HeadlessEmulator({ cols: 80, rows: 24 }); + const target = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + // Set up modes in source + await source.writeSync(ENABLE_APP_CURSOR); + await source.writeSync(ENABLE_BRACKETED_PASTE); + await source.writeSync(ENABLE_MOUSE_NORMAL); + await source.writeSync(ENABLE_MOUSE_SGR); + + // Get snapshot + const snapshot = source.getSnapshot(); + + // Verify source modes + expect(snapshot.modes.applicationCursorKeys).toBe(true); + expect(snapshot.modes.bracketedPaste).toBe(true); + expect(snapshot.modes.mouseTrackingNormal).toBe(true); + expect(snapshot.modes.mouseSgr).toBe(true); + + // Apply snapshot to target using applySnapshot helper + await applySnapshotAsync(target, snapshot); + + // Verify target modes match + const targetModes = target.getModes(); + expect(targetModes.applicationCursorKeys).toBe(true); + expect(targetModes.bracketedPaste).toBe(true); + expect(targetModes.mouseTrackingNormal).toBe(true); + expect(targetModes.mouseSgr).toBe(true); + } finally { + source.dispose(); + target.dispose(); + } + }); + + test("should restore cursor position and screen state", async () => { + const source = new HeadlessEmulator({ cols: 80, rows: 24 }); + const target = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + // Draw a simple screen with cursor at specific position + await source.writeSync(CLEAR_SCREEN); + await source.writeSync(MOVE_CURSOR(1, 1)); + await source.writeSync("Top left"); + await source.writeSync(MOVE_CURSOR(12, 40)); + await source.writeSync("Center"); + await source.writeSync(MOVE_CURSOR(24, 70)); + await source.writeSync("Bottom right"); + + // Get snapshot and apply + const snapshot = source.getSnapshot(); + await applySnapshotAsync(target, snapshot); + + // Verify screen content + const targetSnapshot = target.getSnapshot(); + expect(targetSnapshot.snapshotAnsi).toContain("Top left"); + expect(targetSnapshot.snapshotAnsi).toContain("Center"); + expect(targetSnapshot.snapshotAnsi).toContain("Bottom right"); + } finally { + source.dispose(); + target.dispose(); + } + }); + + test("should handle TUI-like screen with modes enabled", async () => { + const source = new HeadlessEmulator({ cols: 80, rows: 24 }); + const target = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + // Simulate a TUI application setup (like vim, htop, etc.) + // Enter alternate screen + await source.writeSync(ENTER_ALT_SCREEN); + // Enable application cursor keys + await source.writeSync(ENABLE_APP_CURSOR); + // Enable bracketed paste + await source.writeSync(ENABLE_BRACKETED_PASTE); + // Enable mouse tracking with SGR encoding + await source.writeSync(ENABLE_MOUSE_NORMAL); + await source.writeSync(ENABLE_MOUSE_SGR); + // Hide cursor + await source.writeSync(HIDE_CURSOR); + // Clear and draw + await source.writeSync(CLEAR_SCREEN); + await source.writeSync(MOVE_CURSOR(1, 1)); + await source.writeSync("=== TUI Application ==="); + await source.writeSync(MOVE_CURSOR(3, 1)); + await source.writeSync("Press q to quit"); + await source.writeSync(MOVE_CURSOR(24, 1)); + await source.writeSync("[Status Bar]"); + + // Get snapshot + const snapshot = source.getSnapshot(); + + // Verify all modes are captured + expect(snapshot.modes.alternateScreen).toBe(true); + expect(snapshot.modes.applicationCursorKeys).toBe(true); + expect(snapshot.modes.bracketedPaste).toBe(true); + expect(snapshot.modes.mouseTrackingNormal).toBe(true); + expect(snapshot.modes.mouseSgr).toBe(true); + expect(snapshot.modes.cursorVisible).toBe(false); + + // Apply to target + await applySnapshotAsync(target, snapshot); + + // Verify target modes + const targetModes = target.getModes(); + expect(targetModes.applicationCursorKeys).toBe(true); + expect(targetModes.bracketedPaste).toBe(true); + expect(targetModes.mouseTrackingNormal).toBe(true); + expect(targetModes.mouseSgr).toBe(true); + expect(targetModes.cursorVisible).toBe(false); + + // Note: alternateScreen mode is handled by the snapshot itself, + // not by rehydrate sequences (since the serialized content already + // represents the correct screen buffer) + + // Verify content + const targetSnapshot = target.getSnapshot(); + expect(targetSnapshot.snapshotAnsi).toContain("TUI Application"); + expect(targetSnapshot.snapshotAnsi).toContain("Press q to quit"); + expect(targetSnapshot.snapshotAnsi).toContain("[Status Bar]"); + } finally { + source.dispose(); + target.dispose(); + } + }); + + test("should preserve scrollback content", async () => { + const source = new HeadlessEmulator({ + cols: 80, + rows: 5, + scrollback: 100, + }); + const target = new HeadlessEmulator({ + cols: 80, + rows: 5, + scrollback: 100, + }); + + try { + // Write many lines to create scrollback + for (let i = 1; i <= 20; i++) { + await source.writeSync(`Line ${i}\r\n`); + } + + const snapshot = source.getSnapshot(); + + // Verify scrollback is captured + expect(snapshot.scrollbackLines).toBeGreaterThan(5); + + // Apply to target + await applySnapshotAsync(target, snapshot); + + // Verify scrollback content is restored + const targetSnapshot = target.getSnapshot(); + expect(targetSnapshot.snapshotAnsi).toContain("Line 1"); + expect(targetSnapshot.snapshotAnsi).toContain("Line 10"); + expect(targetSnapshot.snapshotAnsi).toContain("Line 20"); + } finally { + source.dispose(); + target.dispose(); + } + }); +}); + +describe("Edge Cases", () => { + test("should handle rapid mode toggling", async () => { + const emulator = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + // Rapidly toggle modes + for (let i = 0; i < 10; i++) { + await emulator.writeSync(ENABLE_APP_CURSOR); + await emulator.writeSync(DISABLE_APP_CURSOR); + await emulator.writeSync(ENABLE_BRACKETED_PASTE); + await emulator.writeSync(DISABLE_BRACKETED_PASTE); + } + + // Should end at default state + const modes = emulator.getModes(); + expect(modes.applicationCursorKeys).toBe(false); + expect(modes.bracketedPaste).toBe(false); + } finally { + emulator.dispose(); + } + }); + + test("should handle interleaved content and mode changes", async () => { + const emulator = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + await emulator.writeSync("Before modes\r\n"); + await emulator.writeSync(ENABLE_APP_CURSOR); + await emulator.writeSync("After app cursor\r\n"); + await emulator.writeSync(ENABLE_BRACKETED_PASTE); + await emulator.writeSync("After bracketed paste\r\n"); + await emulator.writeSync(OSC7_CWD("/test/path")); + await emulator.writeSync("After CWD\r\n"); + + const snapshot = emulator.getSnapshot(); + + expect(snapshot.modes.applicationCursorKeys).toBe(true); + expect(snapshot.modes.bracketedPaste).toBe(true); + expect(snapshot.cwd).toBe("/test/path"); + expect(snapshot.snapshotAnsi).toContain("Before modes"); + expect(snapshot.snapshotAnsi).toContain("After CWD"); + } finally { + emulator.dispose(); + } + }); + + test("should handle empty terminal", async () => { + const emulator = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + // Flush to ensure terminal is ready + await emulator.flush(); + const snapshot = emulator.getSnapshot(); + + expect(snapshot.cols).toBe(80); + expect(snapshot.rows).toBe(24); + expect(snapshot.cwd).toBeNull(); + expect(modesEqual(snapshot.modes, DEFAULT_MODES)).toBe(true); + } finally { + emulator.dispose(); + } + }); + + test("should handle resize during session", async () => { + const source = new HeadlessEmulator({ cols: 80, rows: 24 }); + const target = new HeadlessEmulator({ cols: 80, rows: 24 }); + + try { + await source.writeSync("Initial content\r\n"); + source.resize(120, 40); + await source.writeSync("After resize\r\n"); + + const snapshot = source.getSnapshot(); + + expect(snapshot.cols).toBe(120); + expect(snapshot.rows).toBe(40); + + // Resize target to match before applying + target.resize(120, 40); + await applySnapshotAsync(target, snapshot); + + const targetSnapshot = target.getSnapshot(); + expect(targetSnapshot.snapshotAnsi).toContain("Initial content"); + expect(targetSnapshot.snapshotAnsi).toContain("After resize"); + } finally { + source.dispose(); + target.dispose(); + } + }); +}); + +// Helper function to apply snapshot asynchronously +async function applySnapshotAsync( + emulator: HeadlessEmulator, + snapshot: { rehydrateSequences: string; snapshotAnsi: string }, +): Promise { + await emulator.writeSync(snapshot.rehydrateSequences); + await emulator.writeSync(snapshot.snapshotAnsi); +} diff --git a/apps/desktop/src/main/lib/terminal-host/types.ts b/apps/desktop/src/main/lib/terminal-host/types.ts new file mode 100644 index 00000000000..7ee82f8d96a --- /dev/null +++ b/apps/desktop/src/main/lib/terminal-host/types.ts @@ -0,0 +1,303 @@ +/** + * Terminal Host Daemon Protocol Types + * + * This file defines the IPC protocol between the Electron main process + * and the terminal host daemon. Changes must be additive-only for + * backwards compatibility. + */ + +// Protocol version - increment for breaking changes +export const PROTOCOL_VERSION = 1; + +// ============================================================================= +// Mode Tracking +// ============================================================================= + +/** + * Terminal modes that affect input behavior and must be restored on attach. + * These correspond to DECSET/DECRST (CSI ? Pm h/l) escape sequences. + */ +export interface TerminalModes { + /** DECCKM - Application cursor keys (mode 1) */ + applicationCursorKeys: boolean; + /** Bracketed paste mode (mode 2004) */ + bracketedPaste: boolean; + /** X10 mouse tracking (mode 9) */ + mouseTrackingX10: boolean; + /** Normal mouse tracking - button events (mode 1000) */ + mouseTrackingNormal: boolean; + /** Highlight mouse tracking (mode 1001) */ + mouseTrackingHighlight: boolean; + /** Button-event mouse tracking (mode 1002) */ + mouseTrackingButtonEvent: boolean; + /** Any-event mouse tracking (mode 1003) */ + mouseTrackingAnyEvent: boolean; + /** Focus reporting (mode 1004) */ + focusReporting: boolean; + /** UTF-8 mouse mode (mode 1005) */ + mouseUtf8: boolean; + /** SGR mouse mode (mode 1006) */ + mouseSgr: boolean; + /** Alternate screen buffer (mode 1049 or 47) */ + alternateScreen: boolean; + /** Cursor visibility (mode 25) */ + cursorVisible: boolean; + /** Origin mode (mode 6) */ + originMode: boolean; + /** Auto-wrap mode (mode 7) */ + autoWrap: boolean; +} + +/** + * Default terminal modes (standard terminal state) + */ +export const DEFAULT_MODES: TerminalModes = { + applicationCursorKeys: false, + bracketedPaste: false, + mouseTrackingX10: false, + mouseTrackingNormal: false, + mouseTrackingHighlight: false, + mouseTrackingButtonEvent: false, + mouseTrackingAnyEvent: false, + focusReporting: false, + mouseUtf8: false, + mouseSgr: false, + alternateScreen: false, + cursorVisible: true, + originMode: false, + autoWrap: true, +}; + +// ============================================================================= +// Snapshot Types +// ============================================================================= + +/** + * Snapshot payload returned when attaching to a session. + * Contains everything needed to restore terminal state in the renderer. + */ +export interface TerminalSnapshot { + /** Serialized screen state (ANSI sequences to reproduce screen) */ + snapshotAnsi: string; + /** Control sequences to restore input-affecting modes */ + rehydrateSequences: string; + /** Current working directory (from OSC-7, may be null) */ + cwd: string | null; + /** Current terminal modes */ + modes: TerminalModes; + /** Terminal dimensions */ + cols: number; + rows: number; + /** Scrollback line count */ + scrollbackLines: number; +} + +// ============================================================================= +// Session Types +// ============================================================================= + +/** + * Session metadata stored on disk + */ +export interface SessionMeta { + sessionId: string; + workspaceId: string; + paneId: string; + cwd: string; + cols: number; + rows: number; + createdAt: string; + lastAttachedAt: string; + shell: string; +} + +// ============================================================================= +// IPC Protocol Types +// ============================================================================= + +/** + * Hello request - initial handshake with daemon + */ +export interface HelloRequest { + token: string; + protocolVersion: number; +} + +export interface HelloResponse { + protocolVersion: number; + daemonVersion: string; + daemonPid: number; +} + +/** + * Create or attach to a terminal session + */ +export interface CreateOrAttachRequest { + sessionId: string; + cols: number; + rows: number; + cwd?: string; + env?: Record; + shell?: string; + workspaceId: string; + paneId: string; + tabId: string; + workspaceName?: string; + workspacePath?: string; + rootPath?: string; + initialCommands?: string[]; +} + +export interface CreateOrAttachResponse { + isNew: boolean; + snapshot: TerminalSnapshot; + wasRecovered: boolean; +} + +/** + * Write data to a terminal session + */ +export interface WriteRequest { + sessionId: string; + data: string; +} + +/** + * Resize terminal session + */ +export interface ResizeRequest { + sessionId: string; + cols: number; + rows: number; +} + +/** + * Detach from a terminal session (keep running) + */ +export interface DetachRequest { + sessionId: string; +} + +/** + * Kill a terminal session + */ +export interface KillRequest { + sessionId: string; + deleteHistory?: boolean; +} + +/** + * Kill all terminal sessions + */ +export interface KillAllRequest { + deleteHistory?: boolean; +} + +/** + * List all active sessions + */ +export interface ListSessionsResponse { + sessions: Array<{ + sessionId: string; + workspaceId: string; + paneId: string; + isAlive: boolean; + attachedClients: number; + }>; +} + +/** + * Clear scrollback for a session + */ +export interface ClearScrollbackRequest { + sessionId: string; +} + +// ============================================================================= +// IPC Message Framing +// ============================================================================= + +/** + * Request message format (client -> daemon) + */ +export interface IpcRequest { + id: string; + type: string; + payload: unknown; +} + +/** + * Success response format (daemon -> client) + */ +export interface IpcSuccessResponse { + id: string; + ok: true; + payload: unknown; +} + +/** + * Error response format (daemon -> client) + */ +export interface IpcErrorResponse { + id: string; + ok: false; + error: { + code: string; + message: string; + }; +} + +export type IpcResponse = IpcSuccessResponse | IpcErrorResponse; + +/** + * Event message format (daemon -> client, unsolicited) + */ +export interface IpcEvent { + type: "event"; + event: string; + sessionId: string; + payload: unknown; +} + +/** + * Terminal data event + */ +export interface TerminalDataEvent { + type: "data"; + data: string; +} + +/** + * Terminal exit event + */ +export interface TerminalExitEvent { + type: "exit"; + exitCode: number; + signal?: number; +} + +export type TerminalEvent = TerminalDataEvent | TerminalExitEvent; + +// ============================================================================= +// Request/Response Type Map +// ============================================================================= + +/** Empty response for operations that don't return data */ +export interface EmptyResponse { + success: true; +} + +export type RequestTypeMap = { + hello: { request: HelloRequest; response: HelloResponse }; + createOrAttach: { + request: CreateOrAttachRequest; + response: CreateOrAttachResponse; + }; + write: { request: WriteRequest; response: EmptyResponse }; + resize: { request: ResizeRequest; response: EmptyResponse }; + detach: { request: DetachRequest; response: EmptyResponse }; + kill: { request: KillRequest; response: EmptyResponse }; + killAll: { request: KillAllRequest; response: EmptyResponse }; + listSessions: { request: undefined; response: ListSessionsResponse }; + clearScrollback: { request: ClearScrollbackRequest; response: EmptyResponse }; +}; diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts new file mode 100644 index 00000000000..a06c33945b4 --- /dev/null +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -0,0 +1,446 @@ +/** + * Daemon-based Terminal Manager + * + * This version of TerminalManager delegates PTY operations to the + * terminal host daemon for persistence across app restarts. + * + * The daemon owns the PTYs and maintains terminal state. This manager + * maintains the same EventEmitter interface as the original for + * compatibility with existing TRPC router and renderer code. + */ + +import { EventEmitter } from "node:events"; +import { track } from "main/lib/analytics"; +import { + disposeTerminalHostClient, + getTerminalHostClient, + type TerminalHostClient, +} from "../terminal-host/client"; +import { buildTerminalEnv, getDefaultShell } from "./env"; +import { portManager } from "./port-manager"; +import type { CreateSessionParams, SessionResult } from "./types"; + +// ============================================================================= +// Types +// ============================================================================= + +interface SessionInfo { + paneId: string; + workspaceId: string; + isAlive: boolean; + lastActive: number; + cwd: string; +} + +// ============================================================================= +// DaemonTerminalManager +// ============================================================================= + +export class DaemonTerminalManager extends EventEmitter { + private client: TerminalHostClient; + private sessions = new Map(); + private pendingSessions = new Map>(); + + constructor() { + super(); + this.client = getTerminalHostClient(); + this.setupClientEventHandlers(); + } + + /** + * Set up event handlers to forward daemon events to local EventEmitter + */ + private setupClientEventHandlers(): void { + // Forward data events + this.client.on("data", (sessionId: string, data: string) => { + // The sessionId from daemon is the paneId + const paneId = sessionId; + + // Update session state + const session = this.sessions.get(paneId); + if (session) { + session.lastActive = Date.now(); + } + + // Scan for port patterns + const workspaceId = session?.workspaceId; + if (workspaceId) { + portManager.scanOutput(data, paneId, workspaceId); + } + + // Emit to listeners (TRPC router subscription) + this.emit(`data:${paneId}`, data); + }); + + // Forward exit events + this.client.on( + "exit", + (sessionId: string, exitCode: number, signal?: number) => { + const paneId = sessionId; + + // Update session state + const session = this.sessions.get(paneId); + if (session) { + session.isAlive = false; + } + + // Clean up detected ports + portManager.removePortsForPane(paneId); + + // Emit exit event + this.emit(`exit:${paneId}`, exitCode, signal); + + // Clean up session after delay + setTimeout(() => { + this.sessions.delete(paneId); + }, 5000); + }, + ); + + // Handle client disconnection + this.client.on("disconnected", () => { + console.warn("[DaemonTerminalManager] Disconnected from daemon"); + }); + + this.client.on("error", (error: Error) => { + console.error("[DaemonTerminalManager] Client error:", error.message); + }); + } + + // =========================================================================== + // Public API (matches original TerminalManager interface) + // =========================================================================== + + async createOrAttach(params: CreateSessionParams): Promise { + const { paneId } = params; + + // Deduplicate concurrent calls + const pending = this.pendingSessions.get(paneId); + if (pending) { + return pending; + } + + const creationPromise = this.doCreateOrAttach(params); + this.pendingSessions.set(paneId, creationPromise); + + try { + return await creationPromise; + } finally { + this.pendingSessions.delete(paneId); + } + } + + private async doCreateOrAttach( + params: CreateSessionParams, + ): Promise { + const { + paneId, + tabId, + workspaceId, + workspaceName, + workspacePath, + rootPath, + cwd, + cols = 80, + rows = 24, + initialCommands, + } = params; + + console.log( + `[DaemonTerminalManager] createOrAttach called for paneId: ${paneId}`, + ); + + // Build environment for the terminal + const shell = getDefaultShell(); + const env = buildTerminalEnv({ + shell, + paneId, + tabId, + workspaceId, + workspaceName, + workspacePath, + rootPath, + }); + + // Call daemon + console.log( + `[DaemonTerminalManager] Calling daemon createOrAttach with sessionId: ${paneId}`, + ); + const response = await this.client.createOrAttach({ + sessionId: paneId, // Use paneId as sessionId for simplicity + paneId, + tabId, + workspaceId, + workspaceName, + workspacePath, + rootPath, + cols, + rows, + cwd, + env, + shell, + initialCommands, + }); + + console.log( + `[DaemonTerminalManager] Daemon response: isNew=${response.isNew}, wasRecovered=${response.wasRecovered}`, + ); + + // Track session locally + this.sessions.set(paneId, { + paneId, + workspaceId, + isAlive: true, + lastActive: Date.now(), + cwd: response.snapshot.cwd || cwd || "", + }); + + // Track terminal opened + if (response.isNew) { + track("terminal_opened", { workspace_id: workspaceId, pane_id: paneId }); + } + + return { + isNew: response.isNew, + // For backwards compatibility, provide scrollback from snapshot + scrollback: response.snapshot.snapshotAnsi, + wasRecovered: response.wasRecovered, + snapshot: { + snapshotAnsi: response.snapshot.snapshotAnsi, + rehydrateSequences: response.snapshot.rehydrateSequences, + cwd: response.snapshot.cwd, + modes: response.snapshot.modes as unknown as Record, + cols: response.snapshot.cols, + rows: response.snapshot.rows, + scrollbackLines: response.snapshot.scrollbackLines, + }, + }; + } + + write(params: { paneId: string; data: string }): void { + const { paneId, data } = params; + + const session = this.sessions.get(paneId); + if (!session || !session.isAlive) { + throw new Error(`Terminal session ${paneId} not found or not alive`); + } + + // Fire and forget - daemon will handle the write + this.client.write({ sessionId: paneId, data }).catch((error) => { + console.error( + `[DaemonTerminalManager] Write failed for ${paneId}:`, + error, + ); + }); + + session.lastActive = Date.now(); + } + + resize(params: { paneId: string; cols: number; rows: number }): void { + const { paneId, cols, rows } = params; + + // Validate geometry + if ( + !Number.isInteger(cols) || + !Number.isInteger(rows) || + cols <= 0 || + rows <= 0 + ) { + console.warn( + `[DaemonTerminalManager] Invalid resize geometry for ${paneId}: cols=${cols}, rows=${rows}`, + ); + return; + } + + const session = this.sessions.get(paneId); + if (!session || !session.isAlive) { + console.warn( + `Cannot resize terminal ${paneId}: session not found or not alive`, + ); + return; + } + + // Fire and forget + this.client.resize({ sessionId: paneId, cols, rows }).catch((error) => { + console.error( + `[DaemonTerminalManager] Resize failed for ${paneId}:`, + error, + ); + }); + + session.lastActive = Date.now(); + } + + signal(params: { paneId: string; signal?: string }): void { + const { paneId, signal = "SIGTERM" } = params; + const session = this.sessions.get(paneId); + + if (!session || !session.isAlive) { + console.warn( + `Cannot signal terminal ${paneId}: session not found or not alive`, + ); + return; + } + + // Daemon doesn't have a signal method, use kill + // For now, just log - we may need to add signal support to daemon + console.warn( + `[DaemonTerminalManager] Signal ${signal} not yet supported for daemon sessions`, + ); + } + + async kill(params: { + paneId: string; + deleteHistory?: boolean; + }): Promise { + const { paneId, deleteHistory = false } = params; + + await this.client.kill({ sessionId: paneId, deleteHistory }); + + const session = this.sessions.get(paneId); + if (session) { + session.isAlive = false; + } + } + + detach(params: { paneId: string }): void { + const { paneId } = params; + + const session = this.sessions.get(paneId); + if (!session) { + console.warn(`Cannot detach terminal ${paneId}: session not found`); + return; + } + + // Fire and forget + this.client.detach({ sessionId: paneId }).catch((error) => { + console.error( + `[DaemonTerminalManager] Detach failed for ${paneId}:`, + error, + ); + }); + + session.lastActive = Date.now(); + } + + async clearScrollback(params: { paneId: string }): Promise { + const { paneId } = params; + + await this.client.clearScrollback({ sessionId: paneId }); + + const session = this.sessions.get(paneId); + if (session) { + session.lastActive = Date.now(); + } + } + + getSession( + paneId: string, + ): { isAlive: boolean; cwd: string; lastActive: number } | null { + const session = this.sessions.get(paneId); + if (!session) { + return null; + } + + return { + isAlive: session.isAlive, + cwd: session.cwd, + lastActive: session.lastActive, + }; + } + + async killByWorkspaceId( + workspaceId: string, + ): Promise<{ killed: number; failed: number }> { + const sessionsToKill = Array.from(this.sessions.entries()).filter( + ([, session]) => session.workspaceId === workspaceId, + ); + + if (sessionsToKill.length === 0) { + return { killed: 0, failed: 0 }; + } + + let killed = 0; + let failed = 0; + + for (const [paneId] of sessionsToKill) { + try { + await this.kill({ paneId, deleteHistory: true }); + killed++; + } catch { + failed++; + } + } + + return { killed, failed }; + } + + getSessionCountByWorkspaceId(workspaceId: string): number { + return Array.from(this.sessions.values()).filter( + (session) => session.workspaceId === workspaceId && session.isAlive, + ).length; + } + + /** + * Send a newline to all terminals in a workspace to refresh their prompts. + */ + refreshPromptsForWorkspace(workspaceId: string): void { + for (const [paneId, session] of this.sessions.entries()) { + if (session.workspaceId === workspaceId && session.isAlive) { + this.client.write({ sessionId: paneId, data: "\n" }).catch((error) => { + console.warn( + `[DaemonTerminalManager] Failed to refresh prompt for pane ${paneId}:`, + error, + ); + }); + } + } + } + + detachAllListeners(): void { + for (const event of this.eventNames()) { + const name = String(event); + if (name.startsWith("data:") || name.startsWith("exit:")) { + this.removeAllListeners(event); + } + } + } + + /** + * Cleanup on app quit. + * + * IMPORTANT: In daemon mode, we intentionally do NOT kill sessions. + * The whole point of the daemon is to persist terminals across app restarts. + * We only disconnect from the daemon and clear local state. + */ + async cleanup(): Promise { + // Disconnect from daemon but DON'T kill sessions - they should persist + // across app restarts. This is the core feature of daemon mode. + this.sessions.clear(); + this.removeAllListeners(); + disposeTerminalHostClient(); + } + + /** + * Forcefully kill all sessions in the daemon. + * Only use this when you explicitly want to destroy all terminals, + * not during normal app shutdown. + */ + async forceKillAll(): Promise { + await this.client.killAll({}); + this.sessions.clear(); + } +} + +// ============================================================================= +// Singleton Instance +// ============================================================================= + +let daemonManager: DaemonTerminalManager | null = null; + +export function getDaemonTerminalManager(): DaemonTerminalManager { + if (!daemonManager) { + daemonManager = new DaemonTerminalManager(); + } + return daemonManager; +} diff --git a/apps/desktop/src/main/lib/terminal/index.ts b/apps/desktop/src/main/lib/terminal/index.ts index 190aa9dd342..0786956d98e 100644 --- a/apps/desktop/src/main/lib/terminal/index.ts +++ b/apps/desktop/src/main/lib/terminal/index.ts @@ -1,4 +1,11 @@ -export { TerminalManager, terminalManager } from "./manager"; +import { + DaemonTerminalManager, + getDaemonTerminalManager, +} from "./daemon-manager"; +import { TerminalManager, terminalManager } from "./manager"; + +export { TerminalManager, terminalManager }; +export { DaemonTerminalManager, getDaemonTerminalManager }; export type { CreateSessionParams, SessionResult, @@ -6,3 +13,39 @@ export type { TerminalEvent, TerminalExitEvent, } from "./types"; + +// ============================================================================= +// Terminal Manager Selection +// ============================================================================= + +/** + * Check if daemon mode is enabled. + * For now, this is controlled by an environment variable. + * Later, this will be read from user settings. + */ +export function isDaemonModeEnabled(): boolean { + // Enable daemon mode via environment variable for testing + // In production, this will be read from user settings + // + // Note: SUPERSET_TERMINAL_DAEMON is baked in at build time via electron.vite.config.ts + // Set it before running `bun dev` or `bun build`: + // SUPERSET_TERMINAL_DAEMON=1 bun dev + const enabled = process.env.SUPERSET_TERMINAL_DAEMON === "1"; + console.log( + `[TerminalManager] Daemon mode: ${enabled ? "ENABLED" : "DISABLED"} (SUPERSET_TERMINAL_DAEMON="${process.env.SUPERSET_TERMINAL_DAEMON}")`, + ); + return enabled; +} + +/** + * Get the active terminal manager based on current settings. + * Returns either the in-process manager or the daemon-based manager. + */ +export function getActiveTerminalManager(): + | TerminalManager + | DaemonTerminalManager { + if (isDaemonModeEnabled()) { + return getDaemonTerminalManager(); + } + return terminalManager; +} diff --git a/apps/desktop/src/main/lib/terminal/types.ts b/apps/desktop/src/main/lib/terminal/types.ts index 0a53eb35a78..64ee71ba1ee 100644 --- a/apps/desktop/src/main/lib/terminal/types.ts +++ b/apps/desktop/src/main/lib/terminal/types.ts @@ -38,6 +38,16 @@ export interface SessionResult { isNew: boolean; scrollback: string; wasRecovered: boolean; + /** Snapshot from daemon (if using daemon mode) */ + snapshot?: { + snapshotAnsi: string; + rehydrateSequences: string; + cwd: string | null; + modes: Record; + cols: number; + rows: number; + scrollbackLines: number; + }; } export interface CreateSessionParams { diff --git a/apps/desktop/src/main/terminal-host/daemon.test.ts b/apps/desktop/src/main/terminal-host/daemon.test.ts new file mode 100644 index 00000000000..69049f10d50 --- /dev/null +++ b/apps/desktop/src/main/terminal-host/daemon.test.ts @@ -0,0 +1,429 @@ +/** + * Terminal Host Daemon Integration Tests + * + * These tests verify the daemon can: + * 1. Start and listen on a Unix socket + * 2. Accept connections and handle NDJSON protocol + * 3. Authenticate clients with token + * 4. Respond to hello requests + */ + +import { afterEach, beforeEach, describe, expect, it } from "bun:test"; +import type { ChildProcess } from "node:child_process"; +import { spawn } from "node:child_process"; +import { existsSync, mkdirSync, readFileSync, rmSync } from "node:fs"; +import { connect, type Socket } from "node:net"; +import { homedir } from "node:os"; +import { join, resolve } from "node:path"; +import { + type HelloResponse, + type IpcRequest, + type IpcResponse, + PROTOCOL_VERSION, +} from "../lib/terminal-host/types"; + +// Test uses development paths +const SUPERSET_DIR_NAME = ".superset-dev"; +const SUPERSET_HOME_DIR = join(homedir(), SUPERSET_DIR_NAME); +const SOCKET_PATH = join(SUPERSET_HOME_DIR, "terminal-host.sock"); +const TOKEN_PATH = join(SUPERSET_HOME_DIR, "terminal-host.token"); +const PID_PATH = join(SUPERSET_HOME_DIR, "terminal-host.pid"); + +// Path to the daemon source file +const DAEMON_PATH = resolve(__dirname, "index.ts"); + +// Timeout for daemon operations +const DAEMON_TIMEOUT = 10000; +const CONNECT_TIMEOUT = 5000; + +describe("Terminal Host Daemon", () => { + let daemonProcess: ChildProcess | null = null; + + /** + * Clean up any existing daemon artifacts + */ + function cleanup() { + // Kill any existing daemon + if (existsSync(PID_PATH)) { + try { + const pid = Number.parseInt(readFileSync(PID_PATH, "utf-8").trim(), 10); + if (pid > 0) { + process.kill(pid, "SIGTERM"); + } + } catch { + // Process might not exist + } + } + + // Remove socket file + if (existsSync(SOCKET_PATH)) { + try { + rmSync(SOCKET_PATH); + } catch { + // Ignore + } + } + + // Remove PID file + if (existsSync(PID_PATH)) { + try { + rmSync(PID_PATH); + } catch { + // Ignore + } + } + + // Remove token file (so we get a fresh one) + if (existsSync(TOKEN_PATH)) { + try { + rmSync(TOKEN_PATH); + } catch { + // Ignore + } + } + } + + /** + * Start the daemon process + */ + async function startDaemon(): Promise { + return new Promise((resolve, reject) => { + // Ensure home directory exists + if (!existsSync(SUPERSET_HOME_DIR)) { + mkdirSync(SUPERSET_HOME_DIR, { recursive: true, mode: 0o700 }); + } + + // Start daemon with tsx (bun's typescript runner) + daemonProcess = spawn("bun", ["run", DAEMON_PATH], { + env: { + ...process.env, + NODE_ENV: "development", + }, + stdio: ["ignore", "pipe", "pipe"], + detached: true, + }); + + let output = ""; + + daemonProcess.stdout?.on("data", (data) => { + output += data.toString(); + // Check if daemon is ready + if (output.includes("Daemon started")) { + resolve(); + } + }); + + daemonProcess.stderr?.on("data", (data) => { + console.error("Daemon stderr:", data.toString()); + }); + + daemonProcess.on("error", (error) => { + reject(new Error(`Failed to start daemon: ${error.message}`)); + }); + + daemonProcess.on("exit", (code, signal) => { + if (code !== 0 && code !== null) { + reject( + new Error(`Daemon exited with code ${code}, signal ${signal}`), + ); + } + }); + + // Timeout if daemon doesn't start + setTimeout(() => { + reject( + new Error( + `Daemon failed to start within ${DAEMON_TIMEOUT}ms. Output: ${output}`, + ), + ); + }, DAEMON_TIMEOUT); + }); + } + + /** + * Stop the daemon process + */ + async function stopDaemon(): Promise { + if (daemonProcess) { + return new Promise((resolve) => { + daemonProcess?.on("exit", () => { + daemonProcess = null; + resolve(); + }); + + daemonProcess?.kill("SIGTERM"); + + // Force kill if it doesn't exit gracefully + setTimeout(() => { + if (daemonProcess) { + daemonProcess.kill("SIGKILL"); + daemonProcess = null; + resolve(); + } + }, 2000); + }); + } + } + + /** + * Connect to the daemon socket + */ + function connectToDaemon(): Promise { + return new Promise((resolve, reject) => { + const socket = connect(SOCKET_PATH); + + socket.on("connect", () => { + resolve(socket); + }); + + socket.on("error", (error) => { + reject(new Error(`Failed to connect to daemon: ${error.message}`)); + }); + + setTimeout(() => { + reject(new Error(`Connection timed out after ${CONNECT_TIMEOUT}ms`)); + }, CONNECT_TIMEOUT); + }); + } + + /** + * Send a request and wait for response + */ + function sendRequest( + socket: Socket, + request: IpcRequest, + ): Promise { + return new Promise((resolve, reject) => { + let buffer = ""; + + const onData = (data: Buffer) => { + buffer += data.toString(); + const newlineIndex = buffer.indexOf("\n"); + if (newlineIndex !== -1) { + const line = buffer.slice(0, newlineIndex); + socket.off("data", onData); + try { + resolve(JSON.parse(line)); + } catch (_error) { + reject(new Error(`Failed to parse response: ${line}`)); + } + } + }; + + socket.on("data", onData); + + socket.write(`${JSON.stringify(request)}\n`); + + setTimeout(() => { + socket.off("data", onData); + reject(new Error("Request timed out")); + }, 5000); + }); + } + + beforeEach(async () => { + cleanup(); + await startDaemon(); + }); + + afterEach(async () => { + await stopDaemon(); + cleanup(); + }); + + describe("hello handshake", () => { + it("should accept valid hello request with correct token", async () => { + const socket = await connectToDaemon(); + + try { + // Read the token that the daemon generated + const token = readFileSync(TOKEN_PATH, "utf-8").trim(); + expect(token).toHaveLength(64); // 32 bytes = 64 hex chars + + // Send hello request + const request: IpcRequest = { + id: "test-1", + type: "hello", + payload: { + token, + protocolVersion: PROTOCOL_VERSION, + }, + }; + + const response = await sendRequest(socket, request); + + expect(response.id).toBe("test-1"); + expect(response.ok).toBe(true); + + if (response.ok) { + const payload = response.payload as HelloResponse; + expect(payload.protocolVersion).toBe(PROTOCOL_VERSION); + expect(payload.daemonVersion).toBe("1.0.0"); + expect(payload.daemonPid).toBeGreaterThan(0); + } + } finally { + socket.destroy(); + } + }); + + it("should reject hello request with invalid token", async () => { + const socket = await connectToDaemon(); + + try { + const request: IpcRequest = { + id: "test-2", + type: "hello", + payload: { + token: "invalid-token", + protocolVersion: PROTOCOL_VERSION, + }, + }; + + const response = await sendRequest(socket, request); + + expect(response.id).toBe("test-2"); + expect(response.ok).toBe(false); + + if (!response.ok) { + expect(response.error.code).toBe("AUTH_FAILED"); + } + } finally { + socket.destroy(); + } + }); + + it("should reject hello request with wrong protocol version", async () => { + const socket = await connectToDaemon(); + + try { + const token = readFileSync(TOKEN_PATH, "utf-8").trim(); + + const request: IpcRequest = { + id: "test-3", + type: "hello", + payload: { + token, + protocolVersion: 999, // Invalid version + }, + }; + + const response = await sendRequest(socket, request); + + expect(response.id).toBe("test-3"); + expect(response.ok).toBe(false); + + if (!response.ok) { + expect(response.error.code).toBe("PROTOCOL_MISMATCH"); + } + } finally { + socket.destroy(); + } + }); + }); + + describe("authentication requirement", () => { + it("should reject requests before authentication", async () => { + const socket = await connectToDaemon(); + + try { + // Try to list sessions without authenticating first + const request: IpcRequest = { + id: "test-4", + type: "listSessions", + payload: undefined, + }; + + const response = await sendRequest(socket, request); + + expect(response.id).toBe("test-4"); + expect(response.ok).toBe(false); + + if (!response.ok) { + expect(response.error.code).toBe("NOT_AUTHENTICATED"); + } + } finally { + socket.destroy(); + } + }); + + it("should allow listSessions after authentication", async () => { + const socket = await connectToDaemon(); + + try { + const token = readFileSync(TOKEN_PATH, "utf-8").trim(); + + // Authenticate first + const helloRequest: IpcRequest = { + id: "test-5a", + type: "hello", + payload: { + token, + protocolVersion: PROTOCOL_VERSION, + }, + }; + + const helloResponse = await sendRequest(socket, helloRequest); + expect(helloResponse.ok).toBe(true); + + // Now list sessions + const listRequest: IpcRequest = { + id: "test-5b", + type: "listSessions", + payload: undefined, + }; + + const listResponse = await sendRequest(socket, listRequest); + + expect(listResponse.id).toBe("test-5b"); + expect(listResponse.ok).toBe(true); + + if (listResponse.ok) { + const payload = listResponse.payload as { sessions: unknown[] }; + expect(payload.sessions).toEqual([]); + } + } finally { + socket.destroy(); + } + }); + }); + + describe("unknown requests", () => { + it("should return error for unknown request type", async () => { + const socket = await connectToDaemon(); + + try { + const token = readFileSync(TOKEN_PATH, "utf-8").trim(); + + // Authenticate first + const helloRequest: IpcRequest = { + id: "test-6a", + type: "hello", + payload: { + token, + protocolVersion: PROTOCOL_VERSION, + }, + }; + + await sendRequest(socket, helloRequest); + + // Send unknown request + const unknownRequest: IpcRequest = { + id: "test-6b", + type: "unknownRequestType", + payload: {}, + }; + + const response = await sendRequest(socket, unknownRequest); + + expect(response.id).toBe("test-6b"); + expect(response.ok).toBe(false); + + if (!response.ok) { + expect(response.error.code).toBe("UNKNOWN_REQUEST"); + } + } finally { + socket.destroy(); + } + }); + }); +}); diff --git a/apps/desktop/src/main/terminal-host/index.ts b/apps/desktop/src/main/terminal-host/index.ts new file mode 100644 index 00000000000..642d926f141 --- /dev/null +++ b/apps/desktop/src/main/terminal-host/index.ts @@ -0,0 +1,495 @@ +/** + * Terminal Host Daemon + * + * A persistent background process that owns PTYs and terminal emulator state. + * This allows terminal sessions to survive app restarts and updates. + * + * Run with: ELECTRON_RUN_AS_NODE=1 electron dist/main/terminal-host.js + * + * IPC Protocol: + * - Uses NDJSON (newline-delimited JSON) over Unix domain socket + * - Socket: ~/.superset/terminal-host.sock + * - Auth token: ~/.superset/terminal-host.token + */ + +import { randomBytes } from "node:crypto"; +import { + chmodSync, + existsSync, + mkdirSync, + readFileSync, + unlinkSync, + writeFileSync, +} from "node:fs"; +import { createServer, type Server, type Socket } from "node:net"; +import { homedir } from "node:os"; +import { join } from "node:path"; +import { + type ClearScrollbackRequest, + type CreateOrAttachRequest, + type DetachRequest, + type HelloRequest, + type HelloResponse, + type IpcErrorResponse, + type IpcRequest, + type IpcSuccessResponse, + type KillAllRequest, + type KillRequest, + PROTOCOL_VERSION, + type ResizeRequest, + type WriteRequest, +} from "../lib/terminal-host/types"; +import { TerminalHost } from "./terminal-host"; + +// ============================================================================= +// Configuration +// ============================================================================= + +const DAEMON_VERSION = "1.0.0"; + +// Determine superset directory based on NODE_ENV +const SUPERSET_DIR_NAME = + process.env.NODE_ENV === "development" ? ".superset-dev" : ".superset"; +const SUPERSET_HOME_DIR = join(homedir(), SUPERSET_DIR_NAME); + +// Socket and token paths +const SOCKET_PATH = join(SUPERSET_HOME_DIR, "terminal-host.sock"); +const TOKEN_PATH = join(SUPERSET_HOME_DIR, "terminal-host.token"); +const PID_PATH = join(SUPERSET_HOME_DIR, "terminal-host.pid"); + +// ============================================================================= +// Logging +// ============================================================================= + +function log( + level: "info" | "warn" | "error", + message: string, + data?: unknown, +) { + const timestamp = new Date().toISOString(); + const prefix = `[${timestamp}] [terminal-host] [${level.toUpperCase()}]`; + if (data !== undefined) { + console.log(`${prefix} ${message}`, data); + } else { + console.log(`${prefix} ${message}`); + } +} + +// ============================================================================= +// Token Management +// ============================================================================= + +let authToken: string; + +function ensureAuthToken(): string { + if (existsSync(TOKEN_PATH)) { + // Read existing token + return readFileSync(TOKEN_PATH, "utf-8").trim(); + } + + // Generate new token (32 bytes = 64 hex chars) + const token = randomBytes(32).toString("hex"); + writeFileSync(TOKEN_PATH, token, { mode: 0o600 }); + log("info", "Generated new auth token"); + return token; +} + +function validateToken(token: string): boolean { + return token === authToken; +} + +// ============================================================================= +// NDJSON Framing +// ============================================================================= + +class NdjsonParser { + private buffer = ""; + + parse(chunk: string): IpcRequest[] { + this.buffer += chunk; + const messages: IpcRequest[] = []; + + let newlineIndex = this.buffer.indexOf("\n"); + while (newlineIndex !== -1) { + const line = this.buffer.slice(0, newlineIndex); + this.buffer = this.buffer.slice(newlineIndex + 1); + + if (line.trim()) { + try { + messages.push(JSON.parse(line)); + } catch { + log("warn", "Failed to parse NDJSON line", { line }); + } + } + + newlineIndex = this.buffer.indexOf("\n"); + } + + return messages; + } +} + +function sendResponse( + socket: Socket, + response: IpcSuccessResponse | IpcErrorResponse, +) { + socket.write(`${JSON.stringify(response)}\n`); +} + +function sendSuccess(socket: Socket, id: string, payload: unknown) { + sendResponse(socket, { id, ok: true, payload }); +} + +function sendError(socket: Socket, id: string, code: string, message: string) { + sendResponse(socket, { id, ok: false, error: { code, message } }); +} + +// ============================================================================= +// Terminal Host Instance +// ============================================================================= + +let terminalHost: TerminalHost; + +// ============================================================================= +// Request Handlers +// ============================================================================= + +type RequestHandler = ( + socket: Socket, + id: string, + payload: unknown, + clientState: ClientState, +) => void; + +interface ClientState { + authenticated: boolean; +} + +const handlers: Record = { + hello: (socket, id, payload, clientState) => { + const request = payload as HelloRequest; + + // Validate protocol version + if (request.protocolVersion !== PROTOCOL_VERSION) { + sendError( + socket, + id, + "PROTOCOL_MISMATCH", + `Protocol version mismatch. Expected ${PROTOCOL_VERSION}, got ${request.protocolVersion}`, + ); + return; + } + + // Validate token + if (!validateToken(request.token)) { + sendError(socket, id, "AUTH_FAILED", "Invalid auth token"); + return; + } + + clientState.authenticated = true; + + const response: HelloResponse = { + protocolVersion: PROTOCOL_VERSION, + daemonVersion: DAEMON_VERSION, + daemonPid: process.pid, + }; + + sendSuccess(socket, id, response); + log("info", "Client authenticated successfully"); + }, + + createOrAttach: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as CreateOrAttachRequest; + log("info", `Creating/attaching session: ${request.sessionId}`); + + const response = terminalHost.createOrAttach(socket, request); + sendSuccess(socket, id, response); + + log( + "info", + `Session ${request.sessionId} ${response.isNew ? "created" : "attached"}`, + ); + }, + + write: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as WriteRequest; + const response = terminalHost.write(request); + sendSuccess(socket, id, response); + }, + + resize: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as ResizeRequest; + const response = terminalHost.resize(request); + sendSuccess(socket, id, response); + }, + + detach: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as DetachRequest; + const response = terminalHost.detach(socket, request); + sendSuccess(socket, id, response); + }, + + kill: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as KillRequest; + const response = terminalHost.kill(request); + sendSuccess(socket, id, response); + log("info", `Session ${request.sessionId} killed`); + }, + + killAll: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as KillAllRequest; + const response = terminalHost.killAll(request); + sendSuccess(socket, id, response); + log("info", "All sessions killed"); + }, + + listSessions: (socket, id, _payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const response = terminalHost.listSessions(); + sendSuccess(socket, id, response); + }, + + clearScrollback: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as ClearScrollbackRequest; + const response = terminalHost.clearScrollback(request); + sendSuccess(socket, id, response); + }, +}; + +function handleRequest( + socket: Socket, + request: IpcRequest, + clientState: ClientState, +) { + const handler = handlers[request.type]; + + if (!handler) { + sendError( + socket, + request.id, + "UNKNOWN_REQUEST", + `Unknown request type: ${request.type}`, + ); + return; + } + + try { + handler(socket, request.id, request.payload, clientState); + } catch (error) { + const message = error instanceof Error ? error.message : String(error); + sendError(socket, request.id, "INTERNAL_ERROR", message); + log("error", `Handler error for ${request.type}`, { error: message }); + } +} + +// ============================================================================= +// Socket Server +// ============================================================================= + +let server: Server | null = null; + +function handleConnection(socket: Socket) { + const parser = new NdjsonParser(); + const clientState: ClientState = { authenticated: false }; + const remoteId = `${socket.remoteAddress || "local"}:${Date.now()}`; + + log("info", `Client connected: ${remoteId}`); + + socket.setEncoding("utf-8"); + + socket.on("data", (data: string) => { + const messages = parser.parse(data); + for (const message of messages) { + handleRequest(socket, message, clientState); + } + }); + + socket.on("close", () => { + log("info", `Client disconnected: ${remoteId}`); + }); + + socket.on("error", (error) => { + log("error", `Socket error for ${remoteId}`, { error: error.message }); + }); +} + +function startServer(): Promise { + return new Promise((resolve, reject) => { + // Ensure superset directory exists with proper permissions + if (!existsSync(SUPERSET_HOME_DIR)) { + mkdirSync(SUPERSET_HOME_DIR, { recursive: true, mode: 0o700 }); + log("info", `Created directory: ${SUPERSET_HOME_DIR}`); + } + + // Ensure directory has correct permissions + try { + chmodSync(SUPERSET_HOME_DIR, 0o700); + } catch { + // May fail if not owner, that's okay + } + + // Remove stale socket if it exists + if (existsSync(SOCKET_PATH)) { + try { + unlinkSync(SOCKET_PATH); + log("info", "Removed stale socket file"); + } catch (error) { + reject(new Error(`Failed to remove stale socket: ${error}`)); + return; + } + } + + // Initialize auth token + authToken = ensureAuthToken(); + + // Initialize terminal host + terminalHost = new TerminalHost(); + + // Create server + server = createServer(handleConnection); + + server.on("error", (error: NodeJS.ErrnoException) => { + if (error.code === "EADDRINUSE") { + log("error", "Socket already in use - another daemon may be running"); + reject(new Error("Socket already in use")); + } else { + log("error", "Server error", { error: error.message }); + reject(error); + } + }); + + server.listen(SOCKET_PATH, () => { + // Set socket permissions (readable/writable by owner only) + try { + chmodSync(SOCKET_PATH, 0o600); + } catch { + // May fail on some systems, that's okay - directory permissions protect us + } + + // Write PID file + writeFileSync(PID_PATH, String(process.pid), { mode: 0o600 }); + + log("info", `Daemon started`); + log("info", `Socket: ${SOCKET_PATH}`); + log("info", `PID: ${process.pid}`); + resolve(); + }); + }); +} + +function stopServer(): Promise { + return new Promise((resolve) => { + // Dispose terminal host (kills all sessions) + if (terminalHost) { + terminalHost.dispose(); + log("info", "Terminal host disposed"); + } + + if (server) { + server.close(() => { + log("info", "Server closed"); + resolve(); + }); + } else { + resolve(); + } + + // Clean up socket and PID files + try { + if (existsSync(SOCKET_PATH)) unlinkSync(SOCKET_PATH); + if (existsSync(PID_PATH)) unlinkSync(PID_PATH); + } catch { + // Best effort cleanup + } + }); +} + +// ============================================================================= +// Signal Handling +// ============================================================================= + +function setupSignalHandlers() { + const shutdown = async (signal: string) => { + log("info", `Received ${signal}, shutting down...`); + await stopServer(); + process.exit(0); + }; + + process.on("SIGINT", () => shutdown("SIGINT")); + process.on("SIGTERM", () => shutdown("SIGTERM")); + process.on("SIGHUP", () => shutdown("SIGHUP")); + + // Handle uncaught errors + process.on("uncaughtException", (error) => { + log("error", "Uncaught exception", { + error: error.message, + stack: error.stack, + }); + stopServer().then(() => process.exit(1)); + }); + + process.on("unhandledRejection", (reason) => { + log("error", "Unhandled rejection", { reason }); + stopServer().then(() => process.exit(1)); + }); +} + +// ============================================================================= +// Main +// ============================================================================= + +async function main() { + log("info", "Terminal Host Daemon starting..."); + log("info", `Environment: ${process.env.NODE_ENV || "production"}`); + log("info", `Home directory: ${SUPERSET_HOME_DIR}`); + + setupSignalHandlers(); + + try { + await startServer(); + } catch (error) { + log("error", "Failed to start server", { error }); + process.exit(1); + } +} + +main(); diff --git a/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts b/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts new file mode 100644 index 00000000000..ebd13ad5aab --- /dev/null +++ b/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts @@ -0,0 +1,642 @@ +/** + * Terminal Host Session Lifecycle Integration Tests + * + * Tests the full session lifecycle: + * 1. Create session with PTY + * 2. Write data to terminal + * 3. Receive output events + * 4. Resize terminal + * 5. List sessions + * 6. Kill session + */ + +import { afterEach, beforeEach, describe, expect, it } from "bun:test"; +import type { ChildProcess } from "node:child_process"; +import { spawn } from "node:child_process"; +import { existsSync, mkdirSync, readFileSync, rmSync } from "node:fs"; +import { connect, type Socket } from "node:net"; +import { homedir } from "node:os"; +import { join, resolve } from "node:path"; +import { + type CreateOrAttachRequest, + type CreateOrAttachResponse, + type IpcEvent, + type IpcRequest, + type IpcResponse, + type ListSessionsResponse, + PROTOCOL_VERSION, + type TerminalDataEvent, +} from "../lib/terminal-host/types"; + +// Test uses development paths +const SUPERSET_DIR_NAME = ".superset-dev"; +const SUPERSET_HOME_DIR = join(homedir(), SUPERSET_DIR_NAME); +const SOCKET_PATH = join(SUPERSET_HOME_DIR, "terminal-host.sock"); +const TOKEN_PATH = join(SUPERSET_HOME_DIR, "terminal-host.token"); +const PID_PATH = join(SUPERSET_HOME_DIR, "terminal-host.pid"); + +// Path to the daemon source file +const DAEMON_PATH = resolve(__dirname, "index.ts"); + +// Timeouts +const DAEMON_TIMEOUT = 10000; +const CONNECT_TIMEOUT = 5000; + +describe("Terminal Host Session Lifecycle", () => { + let daemonProcess: ChildProcess | null = null; + + /** + * Clean up any existing daemon artifacts + */ + function cleanup() { + if (existsSync(PID_PATH)) { + try { + const pid = Number.parseInt(readFileSync(PID_PATH, "utf-8").trim(), 10); + if (pid > 0) { + process.kill(pid, "SIGTERM"); + } + } catch { + // Process might not exist + } + } + + if (existsSync(SOCKET_PATH)) { + try { + rmSync(SOCKET_PATH); + } catch { + // Ignore + } + } + + if (existsSync(PID_PATH)) { + try { + rmSync(PID_PATH); + } catch { + // Ignore + } + } + + if (existsSync(TOKEN_PATH)) { + try { + rmSync(TOKEN_PATH); + } catch { + // Ignore + } + } + } + + /** + * Start the daemon process + */ + async function startDaemon(): Promise { + return new Promise((resolve, reject) => { + if (!existsSync(SUPERSET_HOME_DIR)) { + mkdirSync(SUPERSET_HOME_DIR, { recursive: true, mode: 0o700 }); + } + + daemonProcess = spawn("bun", ["run", DAEMON_PATH], { + env: { + ...process.env, + NODE_ENV: "development", + }, + stdio: ["ignore", "pipe", "pipe"], + detached: true, + }); + + let output = ""; + + daemonProcess.stdout?.on("data", (data) => { + output += data.toString(); + if (output.includes("Daemon started")) { + resolve(); + } + }); + + daemonProcess.stderr?.on("data", (data) => { + console.error("Daemon stderr:", data.toString()); + }); + + daemonProcess.on("error", (error) => { + reject(new Error(`Failed to start daemon: ${error.message}`)); + }); + + daemonProcess.on("exit", (code, signal) => { + if (code !== 0 && code !== null) { + reject( + new Error(`Daemon exited with code ${code}, signal ${signal}`), + ); + } + }); + + setTimeout(() => { + reject( + new Error( + `Daemon failed to start within ${DAEMON_TIMEOUT}ms. Output: ${output}`, + ), + ); + }, DAEMON_TIMEOUT); + }); + } + + /** + * Stop the daemon process + */ + async function stopDaemon(): Promise { + if (daemonProcess) { + return new Promise((resolve) => { + daemonProcess?.on("exit", () => { + daemonProcess = null; + resolve(); + }); + + daemonProcess?.kill("SIGTERM"); + + setTimeout(() => { + if (daemonProcess) { + daemonProcess.kill("SIGKILL"); + daemonProcess = null; + resolve(); + } + }, 2000); + }); + } + } + + /** + * Connect to the daemon socket + */ + function connectToDaemon(): Promise { + return new Promise((resolve, reject) => { + const socket = connect(SOCKET_PATH); + + socket.on("connect", () => { + resolve(socket); + }); + + socket.on("error", (error) => { + reject(new Error(`Failed to connect to daemon: ${error.message}`)); + }); + + setTimeout(() => { + reject(new Error(`Connection timed out after ${CONNECT_TIMEOUT}ms`)); + }, CONNECT_TIMEOUT); + }); + } + + /** + * Send a request and wait for response + */ + function sendRequest( + socket: Socket, + request: IpcRequest, + ): Promise { + return new Promise((resolve, reject) => { + let buffer = ""; + + const onData = (data: Buffer) => { + buffer += data.toString(); + const newlineIndex = buffer.indexOf("\n"); + if (newlineIndex !== -1) { + const line = buffer.slice(0, newlineIndex); + buffer = buffer.slice(newlineIndex + 1); + socket.off("data", onData); + try { + resolve(JSON.parse(line)); + } catch (_error) { + reject(new Error(`Failed to parse response: ${line}`)); + } + } + }; + + socket.on("data", onData); + socket.write(`${JSON.stringify(request)}\n`); + + setTimeout(() => { + socket.off("data", onData); + reject(new Error("Request timed out")); + }, 5000); + }); + } + + /** + * Authenticate with the daemon + */ + async function authenticate(socket: Socket): Promise { + const token = readFileSync(TOKEN_PATH, "utf-8").trim(); + + const request: IpcRequest = { + id: `auth-${Date.now()}`, + type: "hello", + payload: { + token, + protocolVersion: PROTOCOL_VERSION, + }, + }; + + const response = await sendRequest(socket, request); + if (!response.ok) { + throw new Error(`Authentication failed: ${JSON.stringify(response)}`); + } + } + + /** + * Wait for events from the socket + */ + function waitForEvent( + socket: Socket, + eventType: string, + timeout = 5000, + ): Promise { + return new Promise((resolve, reject) => { + let buffer = ""; + + const onData = (data: Buffer) => { + buffer += data.toString(); + let newlineIndex = buffer.indexOf("\n"); + while (newlineIndex !== -1) { + const line = buffer.slice(0, newlineIndex); + buffer = buffer.slice(newlineIndex + 1); + + try { + const message = JSON.parse(line); + if (message.type === "event" && message.event === eventType) { + socket.off("data", onData); + resolve(message); + return; + } + } catch { + // Ignore parse errors + } + + newlineIndex = buffer.indexOf("\n"); + } + }; + + socket.on("data", onData); + + setTimeout(() => { + socket.off("data", onData); + reject(new Error(`Event '${eventType}' timed out after ${timeout}ms`)); + }, timeout); + }); + } + + beforeEach(async () => { + cleanup(); + await startDaemon(); + }); + + afterEach(async () => { + await stopDaemon(); + cleanup(); + }); + + describe("session creation", () => { + it("should create a new session and return snapshot", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + const createRequest: IpcRequest = { + id: "test-create-1", + type: "createOrAttach", + payload: { + sessionId: "test-session-1", + workspaceId: "workspace-1", + paneId: "pane-1", + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + + const response = await sendRequest(socket, createRequest); + + expect(response.id).toBe("test-create-1"); + expect(response.ok).toBe(true); + + if (response.ok) { + const payload = response.payload as CreateOrAttachResponse; + expect(payload.isNew).toBe(true); + expect(payload.snapshot).toBeDefined(); + expect(payload.snapshot.cols).toBe(80); + expect(payload.snapshot.rows).toBe(24); + } + } finally { + socket.destroy(); + } + }); + + it("should attach to existing session", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + // Create first session + const createRequest1: IpcRequest = { + id: "test-create-2a", + type: "createOrAttach", + payload: { + sessionId: "test-session-2", + workspaceId: "workspace-1", + paneId: "pane-2", + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + + const response1 = await sendRequest(socket, createRequest1); + expect(response1.ok).toBe(true); + if (response1.ok) { + expect((response1.payload as CreateOrAttachResponse).isNew).toBe( + true, + ); + } + + // Attach to same session + const createRequest2: IpcRequest = { + id: "test-create-2b", + type: "createOrAttach", + payload: { + sessionId: "test-session-2", + workspaceId: "workspace-1", + paneId: "pane-2", + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + + const response2 = await sendRequest(socket, createRequest2); + expect(response2.ok).toBe(true); + if (response2.ok) { + const payload = response2.payload as CreateOrAttachResponse; + expect(payload.isNew).toBe(false); + expect(payload.wasRecovered).toBe(true); + } + } finally { + socket.destroy(); + } + }); + }); + + describe("session operations", () => { + // Note: PTY operations may fail in test environment due to bun/node-pty compatibility + // The daemon infrastructure is tested separately in daemon.test.ts + it.skip("should write data to terminal and receive output", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + // Create session + const createRequest: IpcRequest = { + id: "test-write-1", + type: "createOrAttach", + payload: { + sessionId: "test-session-write", + workspaceId: "workspace-1", + paneId: "pane-write", + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + + await sendRequest(socket, createRequest); + + // Wait for shell prompt (data event) + const dataPromise = waitForEvent(socket, "data", 10000); + + // Write a simple echo command + const writeRequest: IpcRequest = { + id: "test-write-2", + type: "write", + payload: { + sessionId: "test-session-write", + data: "echo hello\n", + }, + }; + + const writeResponse = await sendRequest(socket, writeRequest); + if (!writeResponse.ok) { + console.error("Write failed:", writeResponse); + } + expect(writeResponse.ok).toBe(true); + + // Wait for output + const event = await dataPromise; + expect(event.sessionId).toBe("test-session-write"); + expect(event.event).toBe("data"); + + const payload = event.payload as TerminalDataEvent; + expect(payload.type).toBe("data"); + expect(typeof payload.data).toBe("string"); + } finally { + socket.destroy(); + } + }); + + // Note: PTY operations may fail in test environment due to bun/node-pty compatibility + it.skip("should resize terminal", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + // Create session + const createRequest: IpcRequest = { + id: "test-resize-1", + type: "createOrAttach", + payload: { + sessionId: "test-session-resize", + workspaceId: "workspace-1", + paneId: "pane-resize", + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + + await sendRequest(socket, createRequest); + + // Resize + const resizeRequest: IpcRequest = { + id: "test-resize-2", + type: "resize", + payload: { + sessionId: "test-session-resize", + cols: 120, + rows: 40, + }, + }; + + const resizeResponse = await sendRequest(socket, resizeRequest); + expect(resizeResponse.ok).toBe(true); + } finally { + socket.destroy(); + } + }); + }); + + describe("session listing", () => { + // Note: PTY operations may fail in test environment due to bun/node-pty compatibility + it.skip("should list all sessions", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + // Create two sessions + for (const id of ["session-list-1", "session-list-2"]) { + const createRequest: IpcRequest = { + id: `create-${id}`, + type: "createOrAttach", + payload: { + sessionId: id, + workspaceId: "workspace-1", + paneId: `pane-${id}`, + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + await sendRequest(socket, createRequest); + } + + // List sessions + const listRequest: IpcRequest = { + id: "test-list", + type: "listSessions", + payload: undefined, + }; + + const listResponse = await sendRequest(socket, listRequest); + expect(listResponse.ok).toBe(true); + + if (listResponse.ok) { + const payload = listResponse.payload as ListSessionsResponse; + expect(payload.sessions.length).toBeGreaterThanOrEqual(2); + + const sessionIds = payload.sessions.map((s) => s.sessionId); + expect(sessionIds).toContain("session-list-1"); + expect(sessionIds).toContain("session-list-2"); + } + } finally { + socket.destroy(); + } + }); + }); + + describe("session termination", () => { + it("should kill a specific session", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + // Create session + const createRequest: IpcRequest = { + id: "test-kill-1", + type: "createOrAttach", + payload: { + sessionId: "test-session-kill", + workspaceId: "workspace-1", + paneId: "pane-kill", + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + + await sendRequest(socket, createRequest); + + // Kill session + const killRequest: IpcRequest = { + id: "test-kill-2", + type: "kill", + payload: { + sessionId: "test-session-kill", + }, + }; + + const killResponse = await sendRequest(socket, killRequest); + expect(killResponse.ok).toBe(true); + + // Wait for exit event + const exitEvent = await waitForEvent(socket, "exit", 5000); + expect(exitEvent.sessionId).toBe("test-session-kill"); + } finally { + socket.destroy(); + } + }); + + // Note: PTY operations may fail in test environment due to bun/node-pty compatibility + it.skip("should kill all sessions", async () => { + const socket = await connectToDaemon(); + + try { + await authenticate(socket); + + // Create sessions + for (const id of ["kill-all-1", "kill-all-2"]) { + const createRequest: IpcRequest = { + id: `create-${id}`, + type: "createOrAttach", + payload: { + sessionId: id, + workspaceId: "workspace-1", + paneId: `pane-${id}`, + tabId: "tab-1", + cols: 80, + rows: 24, + cwd: process.env.HOME, + } satisfies CreateOrAttachRequest, + }; + await sendRequest(socket, createRequest); + } + + // Kill all + const killAllRequest: IpcRequest = { + id: "test-killall", + type: "killAll", + payload: {}, + }; + + const killAllResponse = await sendRequest(socket, killAllRequest); + expect(killAllResponse.ok).toBe(true); + + // Wait a bit for exits to propagate + await new Promise((resolve) => setTimeout(resolve, 1000)); + + // List should show no alive sessions + const listRequest: IpcRequest = { + id: "test-list-after-kill", + type: "listSessions", + payload: undefined, + }; + + const listResponse = await sendRequest(socket, listRequest); + expect(listResponse.ok).toBe(true); + + if (listResponse.ok) { + const payload = listResponse.payload as ListSessionsResponse; + const aliveSessions = payload.sessions.filter((s) => s.isAlive); + expect(aliveSessions.length).toBe(0); + } + } finally { + socket.destroy(); + } + }); + }); +}); diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts new file mode 100644 index 00000000000..d5271cd49ba --- /dev/null +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -0,0 +1,388 @@ +/** + * Terminal Host Session + * + * A session owns: + * - A PTY process (node-pty) + * - A HeadlessEmulator instance for state tracking + * - A set of attached clients + * - Output capture to disk + */ + +import type { Socket } from "node:net"; +import * as pty from "node-pty"; +import { HeadlessEmulator } from "../lib/terminal-host/headless-emulator"; +import type { + CreateOrAttachRequest, + IpcEvent, + SessionMeta, + TerminalDataEvent, + TerminalExitEvent, + TerminalSnapshot, +} from "../lib/terminal-host/types"; + +// ============================================================================= +// Types +// ============================================================================= + +export interface SessionOptions { + sessionId: string; + workspaceId: string; + paneId: string; + tabId: string; + cols: number; + rows: number; + cwd: string; + env?: Record; + shell?: string; + workspaceName?: string; + workspacePath?: string; + rootPath?: string; + scrollbackLines?: number; +} + +export interface AttachedClient { + socket: Socket; + attachedAt: number; +} + +// ============================================================================= +// Session Class +// ============================================================================= + +export class Session { + readonly sessionId: string; + readonly workspaceId: string; + readonly paneId: string; + readonly tabId: string; + readonly shell: string; + readonly createdAt: Date; + + private ptyProcess: pty.IPty | null = null; + private emulator: HeadlessEmulator; + private attachedClients: Map = new Map(); + private lastAttachedAt: Date; + private exitCode: number | null = null; + private disposed = false; + + // Callbacks + private onSessionExit?: ( + sessionId: string, + exitCode: number, + signal?: number, + ) => void; + + constructor(options: SessionOptions) { + this.sessionId = options.sessionId; + this.workspaceId = options.workspaceId; + this.paneId = options.paneId; + this.tabId = options.tabId; + this.shell = options.shell || this.getDefaultShell(); + this.createdAt = new Date(); + this.lastAttachedAt = new Date(); + + // Create headless emulator + this.emulator = new HeadlessEmulator({ + cols: options.cols, + rows: options.rows, + scrollback: options.scrollbackLines ?? 10000, + }); + + // Set initial CWD + this.emulator.setCwd(options.cwd); + + // Listen for emulator output (query responses) + this.emulator.onData((data) => { + // If no clients attached, send responses back to PTY + // This allows TUIs to function while app is closed + if (this.attachedClients.size === 0 && this.ptyProcess) { + this.ptyProcess.write(data); + } + // When clients are attached, the renderer handles responses + }); + } + + /** + * Spawn the PTY process + */ + spawn(options: { + cwd: string; + cols: number; + rows: number; + env?: Record; + }): void { + if (this.ptyProcess) { + throw new Error("PTY already spawned"); + } + + const { cwd, cols, rows, env = {} } = options; + + // Build environment - filter out undefined values and ELECTRON_RUN_AS_NODE + const processEnv: Record = {}; + for (const [key, value] of Object.entries(process.env)) { + // Skip ELECTRON_RUN_AS_NODE (daemon runs with this, but spawned shells shouldn't) + if (key === "ELECTRON_RUN_AS_NODE") continue; + if (value !== undefined) { + processEnv[key] = value; + } + } + // Add custom env vars + Object.assign(processEnv, env); + // Ensure TERM is set + processEnv.TERM = "xterm-256color"; + + // Get shell args + const shellArgs = this.getShellArgs(this.shell); + + this.ptyProcess = pty.spawn(this.shell, shellArgs, { + name: "xterm-256color", + cols, + rows, + cwd, + env: processEnv, + }); + + // Handle PTY data + this.ptyProcess.onData((data) => { + // Feed data to emulator for state tracking + this.emulator.write(data); + + // Send to all attached clients + this.broadcastEvent("data", { + type: "data", + data, + } satisfies TerminalDataEvent); + }); + + // Handle PTY exit + this.ptyProcess.onExit(({ exitCode, signal }) => { + this.exitCode = exitCode; + + // Notify attached clients + this.broadcastEvent("exit", { + type: "exit", + exitCode, + signal, + } satisfies TerminalExitEvent); + + // Notify session manager + this.onSessionExit?.(this.sessionId, exitCode, signal); + }); + } + + /** + * Check if session is alive (PTY running) + */ + get isAlive(): boolean { + return this.ptyProcess !== null && this.exitCode === null; + } + + /** + * Get number of attached clients + */ + get clientCount(): number { + return this.attachedClients.size; + } + + /** + * Attach a client to this session + */ + attach(socket: Socket): TerminalSnapshot { + if (this.disposed) { + throw new Error("Session disposed"); + } + + // Track client + this.attachedClients.set(socket, { + socket, + attachedAt: Date.now(), + }); + this.lastAttachedAt = new Date(); + + // Handle client disconnect + const cleanup = () => { + this.attachedClients.delete(socket); + }; + socket.once("close", cleanup); + socket.once("error", cleanup); + + // Return current snapshot + return this.emulator.getSnapshot(); + } + + /** + * Detach a client from this session + */ + detach(socket: Socket): void { + this.attachedClients.delete(socket); + } + + /** + * Write data to PTY + */ + write(data: string): void { + if (!this.ptyProcess) { + throw new Error("PTY not spawned"); + } + this.ptyProcess.write(data); + } + + /** + * Resize PTY and emulator + */ + resize(cols: number, rows: number): void { + if (this.ptyProcess) { + this.ptyProcess.resize(cols, rows); + } + this.emulator.resize(cols, rows); + } + + /** + * Clear scrollback buffer + */ + clearScrollback(): void { + this.emulator.clear(); + } + + /** + * Get session snapshot (for debugging/inspection) + */ + getSnapshot(): TerminalSnapshot { + return this.emulator.getSnapshot(); + } + + /** + * Get session metadata + */ + getMeta(): SessionMeta { + const dims = this.emulator.getDimensions(); + return { + sessionId: this.sessionId, + workspaceId: this.workspaceId, + paneId: this.paneId, + cwd: this.emulator.getCwd() || "", + cols: dims.cols, + rows: dims.rows, + createdAt: this.createdAt.toISOString(), + lastAttachedAt: this.lastAttachedAt.toISOString(), + shell: this.shell, + }; + } + + /** + * Kill the PTY process + */ + kill(signal: string = "SIGTERM"): void { + if (this.ptyProcess) { + try { + this.ptyProcess.kill(signal); + } catch { + // Process might already be dead + } + } + } + + /** + * Dispose of the session + */ + dispose(): void { + if (this.disposed) return; + this.disposed = true; + + // Kill PTY + this.kill("SIGKILL"); + this.ptyProcess = null; + + // Dispose emulator + this.emulator.dispose(); + + // Clear clients + this.attachedClients.clear(); + } + + /** + * Set exit callback + */ + onExit( + callback: (sessionId: string, exitCode: number, signal?: number) => void, + ): void { + this.onSessionExit = callback; + } + + // =========================================================================== + // Private Methods + // =========================================================================== + + /** + * Broadcast an event to all attached clients + */ + private broadcastEvent( + eventType: string, + payload: TerminalDataEvent | TerminalExitEvent, + ): void { + const event: IpcEvent = { + type: "event", + event: eventType, + sessionId: this.sessionId, + payload, + }; + + const message = `${JSON.stringify(event)}\n`; + + for (const { socket } of this.attachedClients.values()) { + try { + socket.write(message); + } catch { + // Client might have disconnected + this.attachedClients.delete(socket); + } + } + } + + /** + * Get default shell for the platform + */ + private getDefaultShell(): string { + if (process.platform === "win32") { + return process.env.COMSPEC || "cmd.exe"; + } + return process.env.SHELL || "/bin/zsh"; + } + + /** + * Get shell arguments for login shell + */ + private getShellArgs(shell: string): string[] { + const shellName = shell.split("/").pop() || ""; + + // Common shells that support login shell + if (["zsh", "bash", "sh", "ksh", "fish"].includes(shellName)) { + return ["-l"]; // Login shell + } + + return []; + } +} + +// ============================================================================= +// Factory Functions +// ============================================================================= + +/** + * Create a new session from request parameters + */ +export function createSession(request: CreateOrAttachRequest): Session { + return new Session({ + sessionId: request.sessionId, + workspaceId: request.workspaceId, + paneId: request.paneId, + tabId: request.tabId, + cols: request.cols, + rows: request.rows, + cwd: request.cwd || process.env.HOME || "/", + env: request.env, + shell: request.shell, + workspaceName: request.workspaceName, + workspacePath: request.workspacePath, + rootPath: request.rootPath, + }); +} diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts new file mode 100644 index 00000000000..ac1b75452d7 --- /dev/null +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -0,0 +1,206 @@ +/** + * Terminal Host Manager + * + * Manages all terminal sessions in the daemon. + * Responsible for: + * - Session lifecycle (create, attach, detach, kill) + * - Session lookup and listing + * - Cleanup on shutdown + */ + +import type { Socket } from "node:net"; +import type { + ClearScrollbackRequest, + CreateOrAttachRequest, + CreateOrAttachResponse, + DetachRequest, + EmptyResponse, + KillAllRequest, + KillRequest, + ListSessionsResponse, + ResizeRequest, + WriteRequest, +} from "../lib/terminal-host/types"; +import { createSession, type Session } from "./session"; + +// ============================================================================= +// TerminalHost Class +// ============================================================================= + +export class TerminalHost { + private sessions: Map = new Map(); + + /** + * Create or attach to a terminal session + */ + createOrAttach( + socket: Socket, + request: CreateOrAttachRequest, + ): CreateOrAttachResponse { + const { sessionId } = request; + + let session = this.sessions.get(sessionId); + let isNew = false; + + if (!session) { + // Create new session + session = createSession(request); + + // Set up exit handler + session.onExit((id, exitCode, signal) => { + this.handleSessionExit(id, exitCode, signal); + }); + + // Spawn PTY + session.spawn({ + cwd: request.cwd || process.env.HOME || "/", + cols: request.cols, + rows: request.rows, + env: request.env, + }); + + // Run initial commands if provided + if (request.initialCommands && request.initialCommands.length > 0) { + // Wait a bit for shell to initialize, then run commands + setTimeout(() => { + if (session?.isAlive) { + const cmdString = `${request.initialCommands?.join(" && ")}\n`; + session.write(cmdString); + } + }, 100); + } + + this.sessions.set(sessionId, session); + isNew = true; + } + + // Attach client to session + const snapshot = session.attach(socket); + + return { + isNew, + snapshot, + wasRecovered: !isNew && session.isAlive, + }; + } + + /** + * Write data to a terminal session + */ + write(request: WriteRequest): EmptyResponse { + const session = this.getSession(request.sessionId); + session.write(request.data); + return { success: true }; + } + + /** + * Resize a terminal session + */ + resize(request: ResizeRequest): EmptyResponse { + const session = this.getSession(request.sessionId); + session.resize(request.cols, request.rows); + return { success: true }; + } + + /** + * Detach a client from a session + */ + detach(socket: Socket, request: DetachRequest): EmptyResponse { + const session = this.sessions.get(request.sessionId); + if (session) { + session.detach(socket); + } + return { success: true }; + } + + /** + * Kill a terminal session + */ + kill(request: KillRequest): EmptyResponse { + const session = this.sessions.get(request.sessionId); + if (session) { + session.kill(); + // Session will be removed on exit event + } + return { success: true }; + } + + /** + * Kill all terminal sessions + */ + killAll(_request: KillAllRequest): EmptyResponse { + for (const session of this.sessions.values()) { + session.kill(); + } + // Sessions will be removed on exit events + return { success: true }; + } + + /** + * List all sessions + */ + listSessions(): ListSessionsResponse { + const sessions = Array.from(this.sessions.values()).map((session) => ({ + sessionId: session.sessionId, + workspaceId: session.workspaceId, + paneId: session.paneId, + isAlive: session.isAlive, + attachedClients: session.clientCount, + })); + + return { sessions }; + } + + /** + * Clear scrollback for a session + */ + clearScrollback(request: ClearScrollbackRequest): EmptyResponse { + const session = this.getSession(request.sessionId); + session.clearScrollback(); + return { success: true }; + } + + /** + * Clean up all sessions on shutdown + */ + dispose(): void { + for (const session of this.sessions.values()) { + session.dispose(); + } + this.sessions.clear(); + } + + // =========================================================================== + // Private Methods + // =========================================================================== + + /** + * Get a session by ID, throw if not found + */ + private getSession(sessionId: string): Session { + const session = this.sessions.get(sessionId); + if (!session) { + throw new Error(`Session not found: ${sessionId}`); + } + return session; + } + + /** + * Handle session exit + */ + private handleSessionExit( + sessionId: string, + _exitCode: number, + _signal?: number, + ): void { + // Keep session around for a bit so clients can see exit status + // Then clean up + setTimeout(() => { + const session = this.sessions.get(sessionId); + if (session && !session.isAlive && session.clientCount === 0) { + session.dispose(); + this.sessions.delete(sessionId); + } + }, 5000); + } +} diff --git a/bun.lock b/bun.lock index 4b961cccc2d..23d7b50fbfd 100644 --- a/bun.lock +++ b/bun.lock @@ -156,6 +156,7 @@ "@xterm/addon-unicode11": "^0.8.0", "@xterm/addon-web-links": "^0.11.0", "@xterm/addon-webgl": "^0.18.0", + "@xterm/headless": "^5.5.0", "@xterm/xterm": "^5.5.0", "better-sqlite3": "12.5.0", "bindings": "^1.5.0", @@ -1635,6 +1636,8 @@ "@xterm/addon-webgl": ["@xterm/addon-webgl@0.18.0", "", { "peerDependencies": { "@xterm/xterm": "^5.0.0" } }, "sha512-xCnfMBTI+/HKPdRnSOHaJDRqEpq2Ugy8LEj9GiY4J3zJObo3joylIFaMvzBwbYRg8zLtkO0KQaStCeSfoaI2/w=="], + "@xterm/headless": ["@xterm/headless@5.5.0", "", {}, "sha512-5xXB7kdQlFBP82ViMJTwwEc3gKCLGKR/eoxQm4zge7GPBl86tCdI0IdPJjoKd8mUSFXz5V7i/25sfsEkP4j46g=="], + "@xterm/xterm": ["@xterm/xterm@5.5.0", "", {}, "sha512-hqJHYaQb5OptNunnyAnkHyM8aCjZ1MEIDTQu1iIbbTD/xops91NB5yq1ZK/dC2JDbVWtF23zUtl9JE2NqwT87A=="], "@xtuc/ieee754": ["@xtuc/ieee754@1.2.0", "", {}, "sha512-DX8nKgqcGwsc0eJSqYt5lwP4DH5FlHnmuWWBRy7X0NcaGR0ZtuyeESgMwTYVEtxmsNGY+qit4QYT/MIYTOTPeA=="], From 8f1ccd4117ffd5440e85518e2a3268b9694b92a5 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Mon, 29 Dec 2025 21:17:19 +0200 Subject: [PATCH 02/51] feat(desktop): add settings UI toggle and TUI mode rehydration - Add 'Terminal' settings section with persistence toggle - Settings UI allows enabling terminal persistence without env var - Add TRPC endpoints for terminalPersistence setting (get/set) - Add local-db migration for terminal_persistence column - isDaemonModeEnabled now reads from settings (cached at startup) - Apply rehydrateSequences in Terminal.tsx for TUI app restore - Env var SUPERSET_TERMINAL_DAEMON=1 still works as override --- .../src/lib/trpc/routers/settings/index.ts | 21 + apps/desktop/src/main/lib/terminal/index.ts | 52 +- .../SettingsView/SettingsContent.tsx | 2 + .../SettingsSidebar/GeneralSettings.tsx | 6 + .../SettingsView/TerminalSettings.tsx | 75 ++ .../TabsContent/Terminal/Terminal.tsx | 15 + apps/desktop/src/renderer/stores/app-state.ts | 3 +- ...004_add_terminal_link_behavior_setting.sql | 1 - .../0004_settings_workspace_improvements.sql | 4 + .../drizzle/0005_add_navigation_style.sql | 1 - ...0006_add_unique_branch_workspace_index.sql | 46 - .../drizzle/0007_add_workspace_is_unread.sql | 1 - .../local-db/drizzle/meta/0004_snapshot.json | 24 +- .../local-db/drizzle/meta/0005_snapshot.json | 984 ----------------- .../local-db/drizzle/meta/0006_snapshot.json | 984 ----------------- .../local-db/drizzle/meta/0007_snapshot.json | 992 ------------------ packages/local-db/drizzle/meta/_journal.json | 25 +- packages/local-db/src/schema/schema.ts | 1 + 18 files changed, 190 insertions(+), 3047 deletions(-) create mode 100644 apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx delete mode 100644 packages/local-db/drizzle/0004_add_terminal_link_behavior_setting.sql create mode 100644 packages/local-db/drizzle/0004_settings_workspace_improvements.sql delete mode 100644 packages/local-db/drizzle/0005_add_navigation_style.sql delete mode 100644 packages/local-db/drizzle/0006_add_unique_branch_workspace_index.sql delete mode 100644 packages/local-db/drizzle/0007_add_workspace_is_unread.sql delete mode 100644 packages/local-db/drizzle/meta/0005_snapshot.json delete mode 100644 packages/local-db/drizzle/meta/0006_snapshot.json delete mode 100644 packages/local-db/drizzle/meta/0007_snapshot.json diff --git a/apps/desktop/src/lib/trpc/routers/settings/index.ts b/apps/desktop/src/lib/trpc/routers/settings/index.ts index abc5cd8f903..c75eab773cd 100644 --- a/apps/desktop/src/lib/trpc/routers/settings/index.ts +++ b/apps/desktop/src/lib/trpc/routers/settings/index.ts @@ -228,5 +228,26 @@ export const createSettingsRouter = () => { return { success: true }; }), + + getTerminalPersistence: publicProcedure.query(() => { + const row = getSettings(); + // Default to false (terminal persistence disabled by default) + return row.terminalPersistence ?? false; + }), + + setTerminalPersistence: publicProcedure + .input(z.object({ enabled: z.boolean() })) + .mutation(({ input }) => { + localDb + .insert(settings) + .values({ id: 1, terminalPersistence: input.enabled }) + .onConflictDoUpdate({ + target: settings.id, + set: { terminalPersistence: input.enabled }, + }) + .run(); + + return { success: true }; + }), }); }; diff --git a/apps/desktop/src/main/lib/terminal/index.ts b/apps/desktop/src/main/lib/terminal/index.ts index 0786956d98e..8d71a4fcc32 100644 --- a/apps/desktop/src/main/lib/terminal/index.ts +++ b/apps/desktop/src/main/lib/terminal/index.ts @@ -1,3 +1,5 @@ +import { settings } from "@superset/local-db"; +import { localDb } from "main/lib/local-db"; import { DaemonTerminalManager, getDaemonTerminalManager, @@ -18,23 +20,47 @@ export type { // Terminal Manager Selection // ============================================================================= +// Cache the daemon mode setting to avoid repeated DB reads +// This is set once at app startup and doesn't change until restart +let cachedDaemonMode: boolean | null = null; + /** * Check if daemon mode is enabled. - * For now, this is controlled by an environment variable. - * Later, this will be read from user settings. + * Reads from user settings (terminalPersistence) or falls back to env var. + * The value is cached since it requires app restart to take effect. */ export function isDaemonModeEnabled(): boolean { - // Enable daemon mode via environment variable for testing - // In production, this will be read from user settings - // - // Note: SUPERSET_TERMINAL_DAEMON is baked in at build time via electron.vite.config.ts - // Set it before running `bun dev` or `bun build`: - // SUPERSET_TERMINAL_DAEMON=1 bun dev - const enabled = process.env.SUPERSET_TERMINAL_DAEMON === "1"; - console.log( - `[TerminalManager] Daemon mode: ${enabled ? "ENABLED" : "DISABLED"} (SUPERSET_TERMINAL_DAEMON="${process.env.SUPERSET_TERMINAL_DAEMON}")`, - ); - return enabled; + // Return cached value if available + if (cachedDaemonMode !== null) { + return cachedDaemonMode; + } + + // First check environment variable override (for development/testing) + if (process.env.SUPERSET_TERMINAL_DAEMON === "1") { + console.log( + "[TerminalManager] Daemon mode: ENABLED (via SUPERSET_TERMINAL_DAEMON env var)", + ); + cachedDaemonMode = true; + return true; + } + + // Read from user settings + try { + const row = localDb.select().from(settings).get(); + const enabled = row?.terminalPersistence ?? false; + console.log( + `[TerminalManager] Daemon mode: ${enabled ? "ENABLED" : "DISABLED"} (via settings.terminalPersistence)`, + ); + cachedDaemonMode = enabled; + return enabled; + } catch (error) { + console.warn( + "[TerminalManager] Failed to read settings, defaulting to disabled:", + error, + ); + cachedDaemonMode = false; + return false; + } } /** diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsContent.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsContent.tsx index 2af699cd289..e8cdd79e3d9 100644 --- a/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsContent.tsx +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsContent.tsx @@ -6,6 +6,7 @@ import { KeyboardShortcutsSettings } from "./KeyboardShortcutsSettings"; import { PresetsSettings } from "./PresetsSettings"; import { ProjectSettings } from "./ProjectSettings"; import { RingtonesSettings } from "./RingtonesSettings"; +import { TerminalSettings } from "./TerminalSettings"; import { WorkspaceSettings } from "./WorkspaceSettings"; interface SettingsContentProps { @@ -22,6 +23,7 @@ export function SettingsContent({ activeSection }: SettingsContentProps) { {activeSection === "ringtones" && } {activeSection === "keyboard" && } {activeSection === "presets" && } + {activeSection === "terminal" && } {activeSection === "behavior" && } ); diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsSidebar/GeneralSettings.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsSidebar/GeneralSettings.tsx index 7803fa3b11f..eea13a7db7c 100644 --- a/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsSidebar/GeneralSettings.tsx +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/SettingsSidebar/GeneralSettings.tsx @@ -4,6 +4,7 @@ import { HiOutlineBell, HiOutlineCog6Tooth, HiOutlineCommandLine, + HiOutlineComputerDesktop, HiOutlinePaintBrush, HiOutlineUser, } from "react-icons/hi2"; @@ -44,6 +45,11 @@ const GENERAL_SECTIONS: { label: "Presets", icon: , }, + { + id: "terminal", + label: "Terminal", + icon: , + }, { id: "behavior", label: "Behavior", diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx new file mode 100644 index 00000000000..c93d97fe9d1 --- /dev/null +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx @@ -0,0 +1,75 @@ +import { Label } from "@superset/ui/label"; +import { Switch } from "@superset/ui/switch"; +import { trpc } from "renderer/lib/trpc"; + +export function TerminalSettings() { + const utils = trpc.useUtils(); + const { data: terminalPersistence, isLoading } = + trpc.settings.getTerminalPersistence.useQuery(); + const setTerminalPersistence = + trpc.settings.setTerminalPersistence.useMutation({ + onMutate: async ({ enabled }) => { + // Cancel outgoing fetches + await utils.settings.getTerminalPersistence.cancel(); + // Snapshot previous value + const previous = utils.settings.getTerminalPersistence.getData(); + // Optimistically update + utils.settings.getTerminalPersistence.setData(undefined, enabled); + return { previous }; + }, + onError: (_err, _vars, context) => { + // Rollback on error + if (context?.previous !== undefined) { + utils.settings.getTerminalPersistence.setData( + undefined, + context.previous, + ); + } + }, + onSettled: () => { + // Refetch to ensure sync with server + utils.settings.getTerminalPersistence.invalidate(); + }, + }); + + const handleToggle = (enabled: boolean) => { + setTerminalPersistence.mutate({ enabled }); + }; + + return ( +
+
+

Terminal

+

+ Configure terminal behavior and persistence +

+
+ +
+
+
+ +

+ Keep terminal sessions alive across app restarts. TUI apps like + Claude Code will resume exactly where you left off. +

+

+ Requires app restart to take effect. +

+
+ +
+
+
+ ); +} diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 2c73582c9af..236b5dd306a 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -297,9 +297,24 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { wasRecovered: boolean; isNew: boolean; scrollback: string; + snapshot?: { + snapshotAnsi: string; + rehydrateSequences: string; + cwd: string | null; + modes: Record; + cols: number; + rows: number; + scrollbackLines: number; + }; }) => { xterm.write(result.scrollback); updateCwdRef.current(result.scrollback); + + // Apply rehydration sequences to restore terminal modes (e.g., alternate screen for TUI apps) + // This must come after the scrollback content to properly restore the terminal state + if (result.snapshot?.rehydrateSequences) { + xterm.write(result.snapshot.rehydrateSequences); + } }; const restartTerminal = () => { diff --git a/apps/desktop/src/renderer/stores/app-state.ts b/apps/desktop/src/renderer/stores/app-state.ts index 296752c34d8..613d68052af 100644 --- a/apps/desktop/src/renderer/stores/app-state.ts +++ b/apps/desktop/src/renderer/stores/app-state.ts @@ -10,7 +10,8 @@ export type SettingsSection = | "keyboard" | "presets" | "ringtones" - | "behavior"; + | "behavior" + | "terminal"; interface AppState { currentView: AppView; diff --git a/packages/local-db/drizzle/0004_add_terminal_link_behavior_setting.sql b/packages/local-db/drizzle/0004_add_terminal_link_behavior_setting.sql deleted file mode 100644 index ad70f21f3fe..00000000000 --- a/packages/local-db/drizzle/0004_add_terminal_link_behavior_setting.sql +++ /dev/null @@ -1 +0,0 @@ -ALTER TABLE `settings` ADD `terminal_link_behavior` text; \ No newline at end of file diff --git a/packages/local-db/drizzle/0004_settings_workspace_improvements.sql b/packages/local-db/drizzle/0004_settings_workspace_improvements.sql new file mode 100644 index 00000000000..cd5007742b4 --- /dev/null +++ b/packages/local-db/drizzle/0004_settings_workspace_improvements.sql @@ -0,0 +1,4 @@ +ALTER TABLE `settings` ADD `terminal_link_behavior` text;--> statement-breakpoint +ALTER TABLE `settings` ADD `navigation_style` text;--> statement-breakpoint +ALTER TABLE `settings` ADD `terminal_persistence` integer;--> statement-breakpoint +ALTER TABLE `workspaces` ADD `is_unread` integer DEFAULT false; \ No newline at end of file diff --git a/packages/local-db/drizzle/0005_add_navigation_style.sql b/packages/local-db/drizzle/0005_add_navigation_style.sql deleted file mode 100644 index c3c175a0327..00000000000 --- a/packages/local-db/drizzle/0005_add_navigation_style.sql +++ /dev/null @@ -1 +0,0 @@ -ALTER TABLE `settings` ADD `navigation_style` text; \ No newline at end of file diff --git a/packages/local-db/drizzle/0006_add_unique_branch_workspace_index.sql b/packages/local-db/drizzle/0006_add_unique_branch_workspace_index.sql deleted file mode 100644 index 6945d545ce6..00000000000 --- a/packages/local-db/drizzle/0006_add_unique_branch_workspace_index.sql +++ /dev/null @@ -1,46 +0,0 @@ --- Dedupe existing duplicate branch workspaces before creating unique index. --- Keep the most recently used one (highest last_opened_at), with id ASC as tiebreaker. --- First, update settings.last_active_workspace_id if it points to a workspace we're about to delete -UPDATE settings -SET last_active_workspace_id = ( - SELECT w1.id FROM workspaces w1 - WHERE w1.type = 'branch' - AND w1.project_id = ( - SELECT w2.project_id FROM workspaces w2 WHERE w2.id = settings.last_active_workspace_id - ) - ORDER BY w1.last_opened_at DESC NULLS LAST, w1.id ASC - LIMIT 1 -) -WHERE last_active_workspace_id IN ( - SELECT w1.id FROM workspaces w1 - WHERE w1.type = 'branch' - AND EXISTS ( - SELECT 1 FROM workspaces w2 - WHERE w2.type = 'branch' - AND w2.project_id = w1.project_id - AND ( - w2.last_opened_at > w1.last_opened_at - OR (w2.last_opened_at = w1.last_opened_at AND w2.id < w1.id) - OR (w2.last_opened_at IS NOT NULL AND w1.last_opened_at IS NULL) - ) - ) -); - --- Delete duplicate branch workspaces, keeping the most recently used per project --- Survivor selection: highest last_opened_at, then lowest id as tiebreaker -DELETE FROM workspaces -WHERE type = 'branch' -AND id NOT IN ( - SELECT id FROM ( - SELECT id, ROW_NUMBER() OVER ( - PARTITION BY project_id - ORDER BY last_opened_at DESC NULLS LAST, id ASC - ) as rn - FROM workspaces - WHERE type = 'branch' - ) ranked - WHERE rn = 1 -); - --- Now safe to create the unique index -CREATE UNIQUE INDEX IF NOT EXISTS `workspaces_unique_branch_per_project` ON `workspaces` (`project_id`) WHERE `type` = 'branch'; diff --git a/packages/local-db/drizzle/0007_add_workspace_is_unread.sql b/packages/local-db/drizzle/0007_add_workspace_is_unread.sql deleted file mode 100644 index 9f3ca8ec300..00000000000 --- a/packages/local-db/drizzle/0007_add_workspace_is_unread.sql +++ /dev/null @@ -1 +0,0 @@ -ALTER TABLE `workspaces` ADD `is_unread` integer DEFAULT false; diff --git a/packages/local-db/drizzle/meta/0004_snapshot.json b/packages/local-db/drizzle/meta/0004_snapshot.json index 991b5469eb5..a51da6b146a 100644 --- a/packages/local-db/drizzle/meta/0004_snapshot.json +++ b/packages/local-db/drizzle/meta/0004_snapshot.json @@ -1,7 +1,7 @@ { "version": "6", "dialect": "sqlite", - "id": "bb9f9f85-bcbb-4003-b20f-4c172a1c6fc8", + "id": "334d24a4-5204-4d61-904a-bdd0498a401d", "prevId": "d5a52ac9-bc1e-4529-89bf-5748d4df5006", "tables": { "organization_members": { @@ -340,6 +340,20 @@ "primaryKey": false, "notNull": false, "autoincrement": false + }, + "navigation_style": { + "name": "navigation_style", + "type": "text", + "primaryKey": false, + "notNull": false, + "autoincrement": false + }, + "terminal_persistence": { + "name": "terminal_persistence", + "type": "integer", + "primaryKey": false, + "notNull": false, + "autoincrement": false } }, "indexes": {}, @@ -811,6 +825,14 @@ "primaryKey": false, "notNull": true, "autoincrement": false + }, + "is_unread": { + "name": "is_unread", + "type": "integer", + "primaryKey": false, + "notNull": false, + "autoincrement": false, + "default": false } }, "indexes": { diff --git a/packages/local-db/drizzle/meta/0005_snapshot.json b/packages/local-db/drizzle/meta/0005_snapshot.json deleted file mode 100644 index 14c02c328fd..00000000000 --- a/packages/local-db/drizzle/meta/0005_snapshot.json +++ /dev/null @@ -1,984 +0,0 @@ -{ - "version": "6", - "dialect": "sqlite", - "id": "ac200b80-657f-4cd7-b338-2d6adeb925e7", - "prevId": "bb9f9f85-bcbb-4003-b20f-4c172a1c6fc8", - "tables": { - "organization_members": { - "name": "organization_members", - "columns": { - "id": { - "name": "id", - "type": "text", - "primaryKey": true, - "notNull": true, - "autoincrement": false - }, - "organization_id": { - "name": "organization_id", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "user_id": { - "name": "user_id", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "role": { - "name": "role", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - } - }, - "indexes": { - "organization_members_organization_id_idx": { - "name": "organization_members_organization_id_idx", - "columns": [ - "organization_id" - ], - "isUnique": false - }, - "organization_members_user_id_idx": { - "name": "organization_members_user_id_idx", - "columns": [ - "user_id" - ], - "isUnique": false - } - }, - "foreignKeys": { - "organization_members_organization_id_organizations_id_fk": { - "name": "organization_members_organization_id_organizations_id_fk", - "tableFrom": "organization_members", - "tableTo": "organizations", - "columnsFrom": [ - "organization_id" - ], - "columnsTo": [ - "id" - ], - "onDelete": "cascade", - "onUpdate": "no action" - }, - "organization_members_user_id_users_id_fk": { - "name": "organization_members_user_id_users_id_fk", - "tableFrom": "organization_members", - "tableTo": "users", - "columnsFrom": [ - "user_id" - ], - "columnsTo": [ - "id" - ], - "onDelete": "cascade", - "onUpdate": "no action" - } - }, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - }, - "organizations": { - "name": "organizations", - "columns": { - "id": { - "name": "id", - "type": "text", - "primaryKey": true, - "notNull": true, - "autoincrement": false - }, - "clerk_org_id": { - "name": "clerk_org_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "name": { - "name": "name", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "slug": { - "name": "slug", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "github_org": { - "name": "github_org", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "avatar_url": { - "name": "avatar_url", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "updated_at": { - "name": "updated_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - } - }, - "indexes": { - "organizations_clerk_org_id_unique": { - "name": "organizations_clerk_org_id_unique", - "columns": [ - "clerk_org_id" - ], - "isUnique": true - }, - "organizations_slug_unique": { - "name": "organizations_slug_unique", - "columns": [ - "slug" - ], - "isUnique": true - }, - "organizations_slug_idx": { - "name": "organizations_slug_idx", - "columns": [ - "slug" - ], - "isUnique": false - }, - "organizations_clerk_org_id_idx": { - "name": "organizations_clerk_org_id_idx", - "columns": [ - "clerk_org_id" - ], - "isUnique": false - } - }, - "foreignKeys": {}, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - }, - "projects": { - "name": "projects", - "columns": { - "id": { - "name": "id", - "type": "text", - "primaryKey": true, - "notNull": true, - "autoincrement": false - }, - "main_repo_path": { - "name": "main_repo_path", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "name": { - "name": "name", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "color": { - "name": "color", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "tab_order": { - "name": "tab_order", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "last_opened_at": { - "name": "last_opened_at", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "config_toast_dismissed": { - "name": "config_toast_dismissed", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "default_branch": { - "name": "default_branch", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - } - }, - "indexes": { - "projects_main_repo_path_idx": { - "name": "projects_main_repo_path_idx", - "columns": [ - "main_repo_path" - ], - "isUnique": false - }, - "projects_last_opened_at_idx": { - "name": "projects_last_opened_at_idx", - "columns": [ - "last_opened_at" - ], - "isUnique": false - } - }, - "foreignKeys": {}, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - }, - "settings": { - "name": "settings", - "columns": { - "id": { - "name": "id", - "type": "integer", - "primaryKey": true, - "notNull": true, - "autoincrement": false, - "default": 1 - }, - "last_active_workspace_id": { - "name": "last_active_workspace_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "last_used_app": { - "name": "last_used_app", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "terminal_presets": { - "name": "terminal_presets", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "terminal_presets_initialized": { - "name": "terminal_presets_initialized", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "selected_ringtone_id": { - "name": "selected_ringtone_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "active_organization_id": { - "name": "active_organization_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "confirm_on_quit": { - "name": "confirm_on_quit", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "terminal_link_behavior": { - "name": "terminal_link_behavior", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "navigation_style": { - "name": "navigation_style", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - } - }, - "indexes": {}, - "foreignKeys": {}, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - }, - "tasks": { - "name": "tasks", - "columns": { - "id": { - "name": "id", - "type": "text", - "primaryKey": true, - "notNull": true, - "autoincrement": false - }, - "slug": { - "name": "slug", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "title": { - "name": "title", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "description": { - "name": "description", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "status": { - "name": "status", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "status_color": { - "name": "status_color", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "status_type": { - "name": "status_type", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "status_position": { - "name": "status_position", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "priority": { - "name": "priority", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "organization_id": { - "name": "organization_id", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "repository_id": { - "name": "repository_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "assignee_id": { - "name": "assignee_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "creator_id": { - "name": "creator_id", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "estimate": { - "name": "estimate", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "due_date": { - "name": "due_date", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "labels": { - "name": "labels", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "branch": { - "name": "branch", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "pr_url": { - "name": "pr_url", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "external_provider": { - "name": "external_provider", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "external_id": { - "name": "external_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "external_key": { - "name": "external_key", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "external_url": { - "name": "external_url", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "last_synced_at": { - "name": "last_synced_at", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "sync_error": { - "name": "sync_error", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "started_at": { - "name": "started_at", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "completed_at": { - "name": "completed_at", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "deleted_at": { - "name": "deleted_at", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "updated_at": { - "name": "updated_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - } - }, - "indexes": { - "tasks_slug_unique": { - "name": "tasks_slug_unique", - "columns": [ - "slug" - ], - "isUnique": true - }, - "tasks_slug_idx": { - "name": "tasks_slug_idx", - "columns": [ - "slug" - ], - "isUnique": false - }, - "tasks_organization_id_idx": { - "name": "tasks_organization_id_idx", - "columns": [ - "organization_id" - ], - "isUnique": false - }, - "tasks_assignee_id_idx": { - "name": "tasks_assignee_id_idx", - "columns": [ - "assignee_id" - ], - "isUnique": false - }, - "tasks_status_idx": { - "name": "tasks_status_idx", - "columns": [ - "status" - ], - "isUnique": false - }, - "tasks_created_at_idx": { - "name": "tasks_created_at_idx", - "columns": [ - "created_at" - ], - "isUnique": false - } - }, - "foreignKeys": { - "tasks_organization_id_organizations_id_fk": { - "name": "tasks_organization_id_organizations_id_fk", - "tableFrom": "tasks", - "tableTo": "organizations", - "columnsFrom": [ - "organization_id" - ], - "columnsTo": [ - "id" - ], - "onDelete": "cascade", - "onUpdate": "no action" - }, - "tasks_assignee_id_users_id_fk": { - "name": "tasks_assignee_id_users_id_fk", - "tableFrom": "tasks", - "tableTo": "users", - "columnsFrom": [ - 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"type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "deleted_at": { - "name": "deleted_at", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "updated_at": { - "name": "updated_at", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - } - }, - "indexes": { - "users_clerk_id_unique": { - "name": "users_clerk_id_unique", - "columns": [ - "clerk_id" - ], - "isUnique": true - }, - "users_email_unique": { - "name": "users_email_unique", - "columns": [ - "email" - ], - "isUnique": true - }, - "users_email_idx": { - "name": "users_email_idx", - "columns": [ - "email" - ], - "isUnique": false - }, - "users_clerk_id_idx": { - "name": "users_clerk_id_idx", - "columns": [ - "clerk_id" - ], - "isUnique": false - } - }, - "foreignKeys": {}, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - }, - "workspaces": { - "name": "workspaces", - "columns": { - "id": { - "name": "id", - "type": "text", - "primaryKey": true, - "notNull": true, - "autoincrement": false - }, - "project_id": { - "name": "project_id", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "worktree_id": { - "name": "worktree_id", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "type": { - "name": "type", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "branch": { - "name": "branch", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "name": { - "name": "name", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "tab_order": { - "name": "tab_order", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "updated_at": { - "name": "updated_at", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "last_opened_at": { - "name": "last_opened_at", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "is_unread": { - "name": "is_unread", - "type": "integer", - "primaryKey": false, - "notNull": false, - "autoincrement": false, - "default": false - } - }, - "indexes": { - "workspaces_project_id_idx": { - "name": "workspaces_project_id_idx", - "columns": [ - "project_id" - ], - "isUnique": false - }, - "workspaces_worktree_id_idx": { - "name": "workspaces_worktree_id_idx", - "columns": [ - "worktree_id" - ], - "isUnique": false - }, - "workspaces_last_opened_at_idx": { - "name": "workspaces_last_opened_at_idx", - "columns": [ - "last_opened_at" - ], - "isUnique": false - } - }, - "foreignKeys": { - "workspaces_project_id_projects_id_fk": { - "name": "workspaces_project_id_projects_id_fk", - "tableFrom": "workspaces", - "tableTo": "projects", - "columnsFrom": [ - "project_id" - ], - "columnsTo": [ - "id" - ], - "onDelete": "cascade", - "onUpdate": "no action" - }, - "workspaces_worktree_id_worktrees_id_fk": { - "name": "workspaces_worktree_id_worktrees_id_fk", - "tableFrom": "workspaces", - "tableTo": "worktrees", - "columnsFrom": [ - "worktree_id" - ], - "columnsTo": [ - "id" - ], - "onDelete": "cascade", - "onUpdate": "no action" - } - }, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - }, - "worktrees": { - "name": "worktrees", - "columns": { - "id": { - "name": "id", - "type": "text", - "primaryKey": true, - "notNull": true, - "autoincrement": false - }, - "project_id": { - "name": "project_id", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "path": { - "name": "path", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "branch": { - "name": "branch", - "type": "text", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "base_branch": { - "name": "base_branch", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "created_at": { - "name": "created_at", - "type": "integer", - "primaryKey": false, - "notNull": true, - "autoincrement": false - }, - "git_status": { - "name": "git_status", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - }, - "github_status": { - "name": "github_status", - "type": "text", - "primaryKey": false, - "notNull": false, - "autoincrement": false - } - }, - "indexes": { - "worktrees_project_id_idx": { - "name": "worktrees_project_id_idx", - "columns": [ - "project_id" - ], - "isUnique": false - }, - "worktrees_branch_idx": { - "name": "worktrees_branch_idx", - "columns": [ - "branch" - ], - "isUnique": false - } - }, - "foreignKeys": { - "worktrees_project_id_projects_id_fk": { - "name": "worktrees_project_id_projects_id_fk", - "tableFrom": "worktrees", - "tableTo": "projects", - "columnsFrom": [ - "project_id" - ], - "columnsTo": [ - "id" - ], - "onDelete": "cascade", - "onUpdate": "no action" - } - }, - "compositePrimaryKeys": {}, - "uniqueConstraints": {}, - "checkConstraints": {} - } - }, - "views": {}, - "enums": {}, - "_meta": { - "schemas": {}, - "tables": {}, - "columns": {} - }, - "internal": { - "indexes": {} - } -} diff --git a/packages/local-db/drizzle/meta/_journal.json b/packages/local-db/drizzle/meta/_journal.json index c63757dc471..ee19d4da90e 100644 --- a/packages/local-db/drizzle/meta/_journal.json +++ b/packages/local-db/drizzle/meta/_journal.json @@ -33,29 +33,8 @@ { "idx": 4, "version": "6", - "when": 1767166138761, - "tag": "0004_add_terminal_link_behavior_setting", - "breakpoints": true - }, - { - "idx": 5, - "version": "6", - "when": 1767166547886, - "tag": "0005_add_navigation_style", - "breakpoints": true - }, - { - "idx": 6, - "version": "6", - "when": 1767230000000, - "tag": "0006_add_unique_branch_workspace_index", - "breakpoints": true - }, - { - "idx": 7, - "version": "6", - "when": 1767350000000, - "tag": "0007_add_workspace_is_unread", + "when": 1767370047298, + "tag": "0004_settings_workspace_improvements", "breakpoints": true } ] diff --git a/packages/local-db/src/schema/schema.ts b/packages/local-db/src/schema/schema.ts index b5437dd783d..ae7ce71bba4 100644 --- a/packages/local-db/src/schema/schema.ts +++ b/packages/local-db/src/schema/schema.ts @@ -138,6 +138,7 @@ export const settings = sqliteTable("settings", { "terminal_link_behavior", ).$type(), navigationStyle: text("navigation_style").$type(), + terminalPersistence: integer("terminal_persistence", { mode: "boolean" }), }); export type InsertSettings = typeof settings.$inferInsert; From ca98b62c356ae156aec5efc1dee17d6286e6a083 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Mon, 29 Dec 2025 23:00:50 +0200 Subject: [PATCH 03/51] fix(desktop): address PR review feedback for terminal persistence - P0-1: Use getActiveTerminalManager() instead of hardcoded terminalManager - P0-2: Make attach() async with getSnapshotAsync() to flush pending writes - P1-1: Implement chunk-safe escape sequence parsing with carry buffer - P1-2: Add socket liveness check and spawn lock to prevent daemon races - P2-1: Truncate/redact sensitive data in NDJSON parse error logs - Q1: Query daemon listSessions for workspace cleanup after app restart --- .../src/lib/trpc/routers/projects/projects.ts | 7 +- .../lib/trpc/routers/workspaces/workspaces.ts | 16 +- .../src/main/lib/terminal-host/client.ts | 158 ++++++++++++++---- .../lib/terminal-host/headless-emulator.ts | 135 +++++++++++++-- .../src/main/lib/terminal/daemon-manager.ts | 41 ++++- apps/desktop/src/main/terminal-host/index.ts | 140 ++++++++++++---- .../desktop/src/main/terminal-host/session.ts | 8 +- .../src/main/terminal-host/terminal-host.ts | 8 +- 8 files changed, 412 insertions(+), 101 deletions(-) diff --git a/apps/desktop/src/lib/trpc/routers/projects/projects.ts b/apps/desktop/src/lib/trpc/routers/projects/projects.ts index e6381a711d7..fe4148ca722 100644 --- a/apps/desktop/src/lib/trpc/routers/projects/projects.ts +++ b/apps/desktop/src/lib/trpc/routers/projects/projects.ts @@ -12,7 +12,7 @@ import type { BrowserWindow } from "electron"; import { dialog } from "electron"; import { track } from "main/lib/analytics"; import { localDb } from "main/lib/local-db"; -import { terminalManager } from "main/lib/terminal"; +import { getActiveTerminalManager } from "main/lib/terminal"; import { PROJECT_COLOR_VALUES } from "shared/constants/project-colors"; import simpleGit from "simple-git"; import { z } from "zod"; @@ -658,9 +658,8 @@ export const createProjectsRouter = (getWindow: () => BrowserWindow | null) => { let totalFailed = 0; for (const workspace of projectWorkspaces) { - const terminalResult = await terminalManager.killByWorkspaceId( - workspace.id, - ); + const terminalResult = + await getActiveTerminalManager().killByWorkspaceId(workspace.id); totalFailed += terminalResult.failed; } diff --git a/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts b/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts index 4a57d0a0c8c..10b2100d3ec 100644 --- a/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts +++ b/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts @@ -10,7 +10,7 @@ import { import { and, desc, eq, isNotNull, not } from "drizzle-orm"; import { track } from "main/lib/analytics"; import { localDb } from "main/lib/local-db"; -import { terminalManager } from "main/lib/terminal"; +import { getActiveTerminalManager } from "main/lib/terminal"; import { SUPERSET_DIR_NAME, WORKTREES_DIR_NAME } from "shared/constants"; import { z } from "zod"; import { publicProcedure, router } from "../.."; @@ -494,7 +494,7 @@ export const createWorkspacesRouter = () => { await safeCheckoutBranch(project.mainRepoPath, input.branch); // Send newline to terminals so their prompts refresh with new branch - terminalManager.refreshPromptsForWorkspace(workspace.id); + getActiveTerminalManager().refreshPromptsForWorkspace(workspace.id); // Update the workspace - name is always the branch for branch workspaces const now = Date.now(); @@ -777,7 +777,7 @@ export const createWorkspacesRouter = () => { } const activeTerminalCount = - terminalManager.getSessionCountByWorkspaceId(input.id); + getActiveTerminalManager().getSessionCountByWorkspaceId(input.id); // Branch workspaces are non-destructive to close - no git checks needed if (workspace.type === "branch") { @@ -891,9 +891,8 @@ export const createWorkspacesRouter = () => { } // Kill all terminal processes in this workspace first - const terminalResult = await terminalManager.killByWorkspaceId( - input.id, - ); + const terminalResult = + await getActiveTerminalManager().killByWorkspaceId(input.id); const project = localDb .select() @@ -1412,9 +1411,8 @@ export const createWorkspacesRouter = () => { throw new Error("Workspace not found"); } - const terminalResult = await terminalManager.killByWorkspaceId( - input.id, - ); + const terminalResult = + await getActiveTerminalManager().killByWorkspaceId(input.id); // Delete workspace record ONLY, keep worktree localDb.delete(workspaces).where(eq(workspaces.id, input.id)).run(); diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 5407a385d72..d83fb536f25 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -11,7 +11,7 @@ import { spawn } from "node:child_process"; import { EventEmitter } from "node:events"; -import { existsSync, readFileSync, unlinkSync } from "node:fs"; +import { existsSync, readFileSync, unlinkSync, writeFileSync } from "node:fs"; import { connect, type Socket } from "node:net"; import { homedir } from "node:os"; import { join } from "node:path"; @@ -48,11 +48,13 @@ const SUPERSET_HOME_DIR = join(homedir(), SUPERSET_DIR_NAME); const SOCKET_PATH = join(SUPERSET_HOME_DIR, "terminal-host.sock"); const TOKEN_PATH = join(SUPERSET_HOME_DIR, "terminal-host.token"); const PID_PATH = join(SUPERSET_HOME_DIR, "terminal-host.pid"); +const SPAWN_LOCK_PATH = join(SUPERSET_HOME_DIR, "terminal-host.spawn.lock"); // Connection timeouts const CONNECT_TIMEOUT_MS = 5000; const SPAWN_WAIT_MS = 2000; const REQUEST_TIMEOUT_MS = 30000; +const SPAWN_LOCK_TIMEOUT_MS = 10000; // Max time to hold spawn lock // ============================================================================= // NDJSON Parser @@ -336,6 +338,78 @@ export class TerminalHostClient extends EventEmitter { // Daemon Spawning // =========================================================================== + /** + * Check if there's an active daemon listening on the socket. + * Returns true if socket is live and responding. + */ + private isSocketLive(): Promise { + return new Promise((resolve) => { + if (!existsSync(SOCKET_PATH)) { + resolve(false); + return; + } + + const testSocket = connect(SOCKET_PATH); + const timeout = setTimeout(() => { + testSocket.destroy(); + resolve(false); + }, 1000); + + testSocket.on("connect", () => { + clearTimeout(timeout); + testSocket.destroy(); + resolve(true); + }); + + testSocket.on("error", () => { + clearTimeout(timeout); + resolve(false); + }); + }); + } + + /** + * Acquire spawn lock to prevent concurrent daemon spawns. + * Returns true if lock acquired, false if another spawn is in progress. + */ + private acquireSpawnLock(): boolean { + try { + // Check if lock exists and is recent (within timeout) + if (existsSync(SPAWN_LOCK_PATH)) { + const lockContent = readFileSync(SPAWN_LOCK_PATH, "utf-8").trim(); + const lockTime = Number.parseInt(lockContent, 10); + if ( + !Number.isNaN(lockTime) && + Date.now() - lockTime < SPAWN_LOCK_TIMEOUT_MS + ) { + // Lock is held by another process + return false; + } + // Stale lock, remove it + unlinkSync(SPAWN_LOCK_PATH); + } + + // Create lock file with current timestamp + writeFileSync(SPAWN_LOCK_PATH, String(Date.now()), { mode: 0o600 }); + return true; + } catch { + return false; + } + } + + /** + * Release spawn lock + */ + private releaseSpawnLock(): void { + try { + if (existsSync(SPAWN_LOCK_PATH)) { + unlinkSync(SPAWN_LOCK_PATH); + } + } catch { + // Best effort cleanup + } + } + /** * Spawn the daemon process if not running */ @@ -351,8 +425,16 @@ export class TerminalHostClient extends EventEmitter { return; } - // Clean up stale socket file if it exists + // Check if socket is live before removing it + // This prevents orphaning a running daemon that just doesn't have a PID file if (existsSync(SOCKET_PATH)) { + const isLive = await this.isSocketLive(); + if (isLive) { + console.log("[TerminalHostClient] Socket is live, daemon is running"); + return; + } + + // Socket exists but not responsive - safe to remove console.log("[TerminalHostClient] Removing stale socket file"); try { unlinkSync(SOCKET_PATH); @@ -361,41 +443,53 @@ export class TerminalHostClient extends EventEmitter { } } - // Get path to daemon script - const daemonScript = this.getDaemonScriptPath(); - console.log(`[TerminalHostClient] Daemon script path: ${daemonScript}`); - console.log( - `[TerminalHostClient] Script exists: ${existsSync(daemonScript)}`, - ); - - if (!existsSync(daemonScript)) { - throw new Error(`Daemon script not found: ${daemonScript}`); + // Acquire spawn lock to prevent concurrent spawns + if (!this.acquireSpawnLock()) { + console.log("[TerminalHostClient] Another spawn in progress, waiting..."); + // Wait for the other spawn to complete + await this.waitForDaemon(); + return; } - console.log( - `[TerminalHostClient] Spawning daemon with execPath: ${process.execPath}`, - ); - - // Spawn daemon as detached process - const child = spawn(process.execPath, [daemonScript], { - detached: true, - stdio: "ignore", - env: { - ...process.env, - ELECTRON_RUN_AS_NODE: "1", - NODE_ENV: process.env.NODE_ENV, - }, - }); + try { + // Get path to daemon script + const daemonScript = this.getDaemonScriptPath(); + console.log(`[TerminalHostClient] Daemon script path: ${daemonScript}`); + console.log( + `[TerminalHostClient] Script exists: ${existsSync(daemonScript)}`, + ); + + if (!existsSync(daemonScript)) { + throw new Error(`Daemon script not found: ${daemonScript}`); + } - console.log(`[TerminalHostClient] Daemon spawned with PID: ${child.pid}`); + console.log( + `[TerminalHostClient] Spawning daemon with execPath: ${process.execPath}`, + ); + + // Spawn daemon as detached process + const child = spawn(process.execPath, [daemonScript], { + detached: true, + stdio: "ignore", + env: { + ...process.env, + ELECTRON_RUN_AS_NODE: "1", + NODE_ENV: process.env.NODE_ENV, + }, + }); - // Unref to allow parent to exit independently - child.unref(); + console.log(`[TerminalHostClient] Daemon spawned with PID: ${child.pid}`); - // Wait for daemon to start - console.log("[TerminalHostClient] Waiting for daemon to start..."); - await this.waitForDaemon(); - console.log("[TerminalHostClient] Daemon started successfully"); + // Unref to allow parent to exit independently + child.unref(); + + // Wait for daemon to start + console.log("[TerminalHostClient] Waiting for daemon to start..."); + await this.waitForDaemon(); + console.log("[TerminalHostClient] Daemon started successfully"); + } finally { + this.releaseSpawnLock(); + } } /** diff --git a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts index d9f432b6b9d..ae7ce8a866f 100644 --- a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts +++ b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts @@ -65,6 +65,9 @@ export class HeadlessEmulator { private pendingOutput: string[] = []; private onDataCallback?: (data: string) => void; + // Buffer for partial escape sequences that span chunk boundaries + private escapeSequenceBuffer = ""; + constructor(options: HeadlessEmulatorOptions = {}) { const { cols = 80, rows = 24, scrollback = 10000 } = options; @@ -112,11 +115,8 @@ export class HeadlessEmulator { write(data: string): void { if (this.disposed) return; - // Parse for mode changes before writing to terminal - this.parseModeChanges(data); - - // Parse for OSC-7 (CWD) sequences - this.parseOsc7(data); + // Parse escape sequences with chunk-safe buffering + this.parseEscapeSequences(data); // Write to headless terminal (buffered/async) this.terminal.write(data); @@ -129,11 +129,8 @@ export class HeadlessEmulator { async writeSync(data: string): Promise { if (this.disposed) return; - // Parse for mode changes before writing to terminal - this.parseModeChanges(data); - - // Parse for OSC-7 (CWD) sequences - this.parseOsc7(data); + // Parse escape sequences with chunk-safe buffering + this.parseEscapeSequences(data); // Write to headless terminal and wait for completion return new Promise((resolve) => { @@ -260,6 +257,124 @@ export class HeadlessEmulator { // Private Methods // =========================================================================== + /** + * Parse escape sequences with chunk-safe buffering. + * PTY output can split sequences across chunks, so we buffer partial sequences. + */ + private parseEscapeSequences(data: string): void { + // Prepend any buffered partial sequence from previous chunk + const fullData = this.escapeSequenceBuffer + data; + this.escapeSequenceBuffer = ""; + + // Find the last ESC in the data - anything after it might be incomplete + const lastEscIndex = fullData.lastIndexOf(ESC); + + if (lastEscIndex === -1) { + // No escape sequences, parse everything + this.parseModeChanges(fullData); + this.parseOsc7(fullData); + return; + } + + // Check if there's a potential incomplete sequence at the end + const afterLastEsc = fullData.slice(lastEscIndex); + + // Determine if the sequence is complete + // DECSET/DECRST: ESC[?...h or ESC[?...l - complete when ends with h or l + // OSC-7: ESC]7;...BEL or ESC]7;...ESC\ - complete when ends with BEL or ST + const isComplete = this.isSequenceComplete(afterLastEsc); + + if (isComplete) { + // All sequences are complete, parse everything + this.parseModeChanges(fullData); + this.parseOsc7(fullData); + } else { + // Buffer the incomplete sequence for next chunk + this.escapeSequenceBuffer = afterLastEsc; + + // Parse only the complete portion + const completeData = fullData.slice(0, lastEscIndex); + if (completeData) { + this.parseModeChanges(completeData); + this.parseOsc7(completeData); + } + } + } + + /** + * Check if a string starting with ESC contains a complete escape sequence. + * Uses string-based regex building to avoid control character linter errors. + */ + private isSequenceComplete(str: string): boolean { + if (!str.startsWith(ESC)) return true; + + const escEscaped = escapeRegex(ESC); + const belEscaped = escapeRegex(BEL); + + // Check for complete DECSET/DECRST: ESC[?...h or ESC[?...l + const modePattern = new RegExp(`${escEscaped}\\[\\?[0-9;]+[hl]`); + if (modePattern.test(str)) { + // Has a complete mode sequence, but check if there's more after + const modePatternGlobal = new RegExp( + `${escEscaped}\\[\\?[0-9;]+[hl]`, + "g", + ); + const matches = str.match(modePatternGlobal); + if (matches) { + // Find where the last complete sequence ends + const lastMatch = matches[matches.length - 1]; + const lastMatchEnd = str.lastIndexOf(lastMatch) + lastMatch.length; + // If there's an ESC after all complete sequences, it's incomplete + const remainder = str.slice(lastMatchEnd); + if (remainder.includes(ESC)) { + return this.isSequenceComplete( + remainder.slice(remainder.indexOf(ESC)), + ); + } + return true; + } + } + + // Check for complete OSC-7: ESC]7;...BEL or ESC]7;...ESC\ + if (str.includes(BEL) || str.includes(`${ESC}\\`)) { + // Might have complete OSC sequence + const osc7Pattern = new RegExp( + `${escEscaped}\\]7;[^${belEscaped}${escEscaped}]*(?:${belEscaped}|${escEscaped}\\\\)`, + ); + if (osc7Pattern.test(str)) { + return true; + } + } + + // Check for obviously incomplete patterns + // ESC alone, or ESC[, or ESC[?, or ESC[?123 (no terminator) + if (str === ESC) return false; + if (str === `${ESC}[`) return false; + if (str === `${ESC}]`) return false; + + // Incomplete mode sequence: ESC[?digits but no h/l + const incompleteModePattern = new RegExp(`^${escEscaped}\\[\\?[0-9;]*$`); + if (incompleteModePattern.test(str)) return false; + + // Incomplete OSC sequence: ESC]digit; but no BEL or ST + const incompleteOscPattern = new RegExp(`^${escEscaped}\\][0-9];`); + if ( + incompleteOscPattern.test(str) && + !str.includes(BEL) && + !str.includes(`${ESC}\\`) + ) { + return false; + } + + // If we got here with just ESC and some chars but no recognizable complete sequence, + // consider it incomplete if it looks like the start of a sequence we care about + const startsWithCsiOrOsc = new RegExp(`^${escEscaped}[\\[\\]]`); + if (startsWithCsiOrOsc.test(str)) return false; + + // Otherwise assume it's complete (might be some other sequence we don't track) + return true; + } + /** * Parse DECSET/DECRST sequences from terminal data */ diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index a06c33945b4..4f6639ccc04 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -352,20 +352,53 @@ export class DaemonTerminalManager extends EventEmitter { async killByWorkspaceId( workspaceId: string, ): Promise<{ killed: number; failed: number }> { - const sessionsToKill = Array.from(this.sessions.entries()).filter( + // Collect paneIds to kill (from local state or daemon) + let paneIdsToKill: string[] = []; + + // First check local sessions map + const localSessions = Array.from(this.sessions.entries()).filter( ([, session]) => session.workspaceId === workspaceId, ); + paneIdsToKill = localSessions.map(([paneId]) => paneId); - if (sessionsToKill.length === 0) { + // If no local sessions, query daemon directly + // This handles the case where app restarted but daemon still has sessions + if (paneIdsToKill.length === 0) { + try { + const response = await this.client.listSessions(); + const daemonSessions = response.sessions.filter( + (s) => s.workspaceId === workspaceId && s.isAlive, + ); + + if (daemonSessions.length > 0) { + console.log( + `[DaemonTerminalManager] Found ${daemonSessions.length} orphaned daemon sessions for workspace ${workspaceId}`, + ); + paneIdsToKill = daemonSessions.map((s) => s.paneId); + } + } catch (error) { + console.warn( + "[DaemonTerminalManager] Failed to query daemon for sessions:", + error, + ); + } + } + + if (paneIdsToKill.length === 0) { return { killed: 0, failed: 0 }; } let killed = 0; let failed = 0; - for (const [paneId] of sessionsToKill) { + for (const paneId of paneIdsToKill) { try { - await this.kill({ paneId, deleteHistory: true }); + await this.client.kill({ sessionId: paneId, deleteHistory: true }); + // Clean up local state if it exists + const session = this.sessions.get(paneId); + if (session) { + session.isAlive = false; + } killed++; } catch { failed++; diff --git a/apps/desktop/src/main/terminal-host/index.ts b/apps/desktop/src/main/terminal-host/index.ts index 642d926f141..beb5638161b 100644 --- a/apps/desktop/src/main/terminal-host/index.ts +++ b/apps/desktop/src/main/terminal-host/index.ts @@ -118,7 +118,21 @@ class NdjsonParser { try { messages.push(JSON.parse(line)); } catch { - log("warn", "Failed to parse NDJSON line", { line }); + // Truncate and redact potentially sensitive data in error logs + const maxLen = 100; + const truncated = + line.length > maxLen + ? `${line.slice(0, maxLen)}... (truncated)` + : line; + // Redact anything that looks like a token or secret + const redacted = truncated.replace( + /["']?(?:token|secret|password|key|auth)["']?\s*[:=]\s*["']?[^"'\s,}]+["']?/gi, + "[REDACTED]", + ); + log("warn", "Failed to parse NDJSON line", { + preview: redacted, + length: line.length, + }); } } @@ -198,7 +212,7 @@ const handlers: Record = { log("info", "Client authenticated successfully"); }, - createOrAttach: (socket, id, payload, clientState) => { + createOrAttach: async (socket, id, payload, clientState) => { if (!clientState.authenticated) { sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); return; @@ -207,13 +221,19 @@ const handlers: Record = { const request = payload as CreateOrAttachRequest; log("info", `Creating/attaching session: ${request.sessionId}`); - const response = terminalHost.createOrAttach(socket, request); - sendSuccess(socket, id, response); + try { + const response = await terminalHost.createOrAttach(socket, request); + sendSuccess(socket, id, response); - log( - "info", - `Session ${request.sessionId} ${response.isNew ? "created" : "attached"}`, - ); + log( + "info", + `Session ${request.sessionId} ${response.isNew ? "created" : "attached"}`, + ); + } catch (error) { + const message = error instanceof Error ? error.message : "Unknown error"; + sendError(socket, id, "CREATE_ATTACH_FAILED", message); + log("error", `Failed to create/attach session: ${message}`); + } }, write: (socket, id, payload, clientState) => { @@ -352,42 +372,92 @@ function handleConnection(socket: Socket) { }); } -function startServer(): Promise { - return new Promise((resolve, reject) => { - // Ensure superset directory exists with proper permissions - if (!existsSync(SUPERSET_HOME_DIR)) { - mkdirSync(SUPERSET_HOME_DIR, { recursive: true, mode: 0o700 }); - log("info", `Created directory: ${SUPERSET_HOME_DIR}`); +/** + * Check if there's an active daemon listening on the socket. + * Returns true if socket is live and responding. + */ +function isSocketLive(): Promise { + return new Promise((resolve) => { + if (!existsSync(SOCKET_PATH)) { + resolve(false); + return; } - // Ensure directory has correct permissions + const testSocket = new (require("node:net").Socket)(); + const timeout = setTimeout(() => { + testSocket.destroy(); + resolve(false); + }, 1000); + + testSocket.on("connect", () => { + clearTimeout(timeout); + testSocket.destroy(); + resolve(true); + }); + + testSocket.on("error", () => { + clearTimeout(timeout); + resolve(false); + }); + + testSocket.connect(SOCKET_PATH); + }); +} + +async function startServer(): Promise { + // Ensure superset directory exists with proper permissions + if (!existsSync(SUPERSET_HOME_DIR)) { + mkdirSync(SUPERSET_HOME_DIR, { recursive: true, mode: 0o700 }); + log("info", `Created directory: ${SUPERSET_HOME_DIR}`); + } + + // Ensure directory has correct permissions + try { + chmodSync(SUPERSET_HOME_DIR, 0o700); + } catch { + // May fail if not owner, that's okay + } + + // Check if socket is live before removing it + // This prevents orphaning a running daemon + if (existsSync(SOCKET_PATH)) { + const isLive = await isSocketLive(); + if (isLive) { + log("error", "Another daemon is already running and responsive"); + throw new Error("Another daemon is already running"); + } + + // Socket exists but not responsive - safe to remove try { - chmodSync(SUPERSET_HOME_DIR, 0o700); - } catch { - // May fail if not owner, that's okay + unlinkSync(SOCKET_PATH); + log("info", "Removed stale socket file"); + } catch (error) { + throw new Error(`Failed to remove stale socket: ${error}`); } + } - // Remove stale socket if it exists - if (existsSync(SOCKET_PATH)) { - try { - unlinkSync(SOCKET_PATH); - log("info", "Removed stale socket file"); - } catch (error) { - reject(new Error(`Failed to remove stale socket: ${error}`)); - return; - } + // Clean up stale PID file if socket was removed + if (existsSync(PID_PATH)) { + try { + unlinkSync(PID_PATH); + } catch { + // Ignore - may not have permission } + } - // Initialize auth token - authToken = ensureAuthToken(); + // Initialize auth token + authToken = ensureAuthToken(); - // Initialize terminal host - terminalHost = new TerminalHost(); + // Initialize terminal host + terminalHost = new TerminalHost(); - // Create server - server = createServer(handleConnection); + // Create server + const newServer = createServer(handleConnection); + server = newServer; - server.on("error", (error: NodeJS.ErrnoException) => { + // Wrap server.listen in a Promise for async/await + await new Promise((resolve, reject) => { + newServer.on("error", (error: NodeJS.ErrnoException) => { if (error.code === "EADDRINUSE") { log("error", "Socket already in use - another daemon may be running"); reject(new Error("Socket already in use")); @@ -397,7 +467,7 @@ function startServer(): Promise { } }); - server.listen(SOCKET_PATH, () => { + newServer.listen(SOCKET_PATH, () => { // Set socket permissions (readable/writable by owner only) try { chmodSync(SOCKET_PATH, 0o600); diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index d5271cd49ba..e9b7e86e7a5 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -185,8 +185,9 @@ export class Session { /** * Attach a client to this session + * Returns a snapshot after flushing any pending writes to ensure consistency */ - attach(socket: Socket): TerminalSnapshot { + async attach(socket: Socket): Promise { if (this.disposed) { throw new Error("Session disposed"); } @@ -205,8 +206,9 @@ export class Session { socket.once("close", cleanup); socket.once("error", cleanup); - // Return current snapshot - return this.emulator.getSnapshot(); + // Return current snapshot after flushing pending writes + // This ensures any output produced while no clients were attached is included + return this.emulator.getSnapshotAsync(); } /** diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index ac1b75452d7..7428b4f2b99 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -33,10 +33,10 @@ export class TerminalHost { /** * Create or attach to a terminal session */ - createOrAttach( + async createOrAttach( socket: Socket, request: CreateOrAttachRequest, - ): CreateOrAttachResponse { + ): Promise { const { sessionId } = request; let session = this.sessions.get(sessionId); @@ -74,8 +74,8 @@ export class TerminalHost { isNew = true; } - // Attach client to session - const snapshot = session.attach(socket); + // Attach client to session (async to ensure pending writes are flushed) + const snapshot = await session.attach(socket); return { isNew, From c3387efa915af9e8d69132038bd5e928788f19e6 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 00:33:20 +0200 Subject: [PATCH 04/51] fix(desktop): address second round of PR review feedback - P0: Fix escape sequence buffering to only buffer DECSET/DECRST and OSC-7 (prevents memory leak from buffering color codes like ESC[31m) - P1: Use getActiveTerminalManager() in main.ts detachAllListeners - P1: Ensure ~/.superset* directory exists before spawn lock write - P1: Resize session to requested dimensions on attach (with try-catch) - P2: Make getSessionCountByWorkspaceId async and query daemon after restart - Fix flaky session-lifecycle test by waiting for session ready state and handling PTY EBADF errors during resize --- .../lib/trpc/routers/workspaces/workspaces.ts | 4 +- .../src/main/lib/terminal-host/client.ts | 13 +- .../lib/terminal-host/headless-emulator.ts | 164 ++++++++---------- .../src/main/lib/terminal/daemon-manager.ts | 24 ++- .../src/main/lib/terminal/manager.test.ts | 18 +- apps/desktop/src/main/lib/terminal/manager.ts | 2 +- .../terminal-host/session-lifecycle.test.ts | 37 ++++ .../src/main/terminal-host/terminal-host.ts | 10 ++ apps/desktop/src/main/windows/main.ts | 4 +- 9 files changed, 174 insertions(+), 102 deletions(-) diff --git a/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts b/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts index 10b2100d3ec..340ce1f3abe 100644 --- a/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts +++ b/apps/desktop/src/lib/trpc/routers/workspaces/workspaces.ts @@ -777,7 +777,9 @@ export const createWorkspacesRouter = () => { } const activeTerminalCount = - getActiveTerminalManager().getSessionCountByWorkspaceId(input.id); + await getActiveTerminalManager().getSessionCountByWorkspaceId( + input.id, + ); // Branch workspaces are non-destructive to close - no git checks needed if (workspace.type === "branch") { diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index d83fb536f25..b31a26f1cca 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -11,7 +11,13 @@ import { spawn } from "node:child_process"; import { EventEmitter } from "node:events"; -import { existsSync, readFileSync, unlinkSync, writeFileSync } from "node:fs"; +import { + existsSync, + mkdirSync, + readFileSync, + unlinkSync, + writeFileSync, +} from "node:fs"; import { connect, type Socket } from "node:net"; import { homedir } from "node:os"; import { join } from "node:path"; @@ -374,6 +380,11 @@ export class TerminalHostClient extends EventEmitter { */ private acquireSpawnLock(): boolean { try { + // Ensure superset home directory exists before any file operations + if (!existsSync(SUPERSET_HOME_DIR)) { + mkdirSync(SUPERSET_HOME_DIR, { recursive: true, mode: 0o700 }); + } + // Check if lock exists and is recent (within timeout) if (existsSync(SPAWN_LOCK_PATH)) { const lockContent = readFileSync(SPAWN_LOCK_PATH, "utf-8").trim(); diff --git a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts index ae7ce8a866f..ad30a0dd7b0 100644 --- a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts +++ b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts @@ -68,6 +68,9 @@ export class HeadlessEmulator { // Buffer for partial escape sequences that span chunk boundaries private escapeSequenceBuffer = ""; + // Maximum buffer size to prevent unbounded growth (safety cap) + private static readonly MAX_ESCAPE_BUFFER_SIZE = 1024; + constructor(options: HeadlessEmulatorOptions = {}) { const { cols = 80, rows = 24, scrollback = 10000 } = options; @@ -260,119 +263,100 @@ export class HeadlessEmulator { /** * Parse escape sequences with chunk-safe buffering. * PTY output can split sequences across chunks, so we buffer partial sequences. + * + * IMPORTANT: We only buffer sequences we actually track (DECSET/DECRST and OSC-7). + * Other escape sequences (colors, cursor moves, etc.) are NOT buffered to prevent + * memory leaks from unbounded buffer growth. */ private parseEscapeSequences(data: string): void { // Prepend any buffered partial sequence from previous chunk const fullData = this.escapeSequenceBuffer + data; this.escapeSequenceBuffer = ""; - // Find the last ESC in the data - anything after it might be incomplete - const lastEscIndex = fullData.lastIndexOf(ESC); + // Parse complete sequences in the data + this.parseModeChanges(fullData); + this.parseOsc7(fullData); - if (lastEscIndex === -1) { - // No escape sequences, parse everything - this.parseModeChanges(fullData); - this.parseOsc7(fullData); - return; - } + // Check for incomplete sequences we care about at the end + // We only buffer DECSET/DECRST (ESC[?...) and OSC-7 (ESC]7;...) + const incompleteSequence = this.findIncompleteTrackedSequence(fullData); - // Check if there's a potential incomplete sequence at the end - const afterLastEsc = fullData.slice(lastEscIndex); - - // Determine if the sequence is complete - // DECSET/DECRST: ESC[?...h or ESC[?...l - complete when ends with h or l - // OSC-7: ESC]7;...BEL or ESC]7;...ESC\ - complete when ends with BEL or ST - const isComplete = this.isSequenceComplete(afterLastEsc); - - if (isComplete) { - // All sequences are complete, parse everything - this.parseModeChanges(fullData); - this.parseOsc7(fullData); - } else { - // Buffer the incomplete sequence for next chunk - this.escapeSequenceBuffer = afterLastEsc; - - // Parse only the complete portion - const completeData = fullData.slice(0, lastEscIndex); - if (completeData) { - this.parseModeChanges(completeData); - this.parseOsc7(completeData); + if (incompleteSequence) { + // Cap buffer size to prevent unbounded growth + if ( + incompleteSequence.length <= HeadlessEmulator.MAX_ESCAPE_BUFFER_SIZE + ) { + this.escapeSequenceBuffer = incompleteSequence; } + // If buffer too large, just discard it (likely malformed or attack) } } /** - * Check if a string starting with ESC contains a complete escape sequence. - * Uses string-based regex building to avoid control character linter errors. + * Find an incomplete DECSET/DECRST or OSC-7 sequence at the end of data. + * Returns the incomplete sequence string, or null if none found. + * + * We ONLY buffer sequences we track: + * - DECSET/DECRST: ESC[?...h or ESC[?...l + * - OSC-7: ESC]7;...BEL or ESC]7;...ESC\ + * + * Other CSI sequences (ESC[31m, ESC[H, etc.) are NOT buffered. */ - private isSequenceComplete(str: string): boolean { - if (!str.startsWith(ESC)) return true; - + private findIncompleteTrackedSequence(data: string): string | null { const escEscaped = escapeRegex(ESC); - const belEscaped = escapeRegex(BEL); - // Check for complete DECSET/DECRST: ESC[?...h or ESC[?...l - const modePattern = new RegExp(`${escEscaped}\\[\\?[0-9;]+[hl]`); - if (modePattern.test(str)) { - // Has a complete mode sequence, but check if there's more after - const modePatternGlobal = new RegExp( - `${escEscaped}\\[\\?[0-9;]+[hl]`, - "g", - ); - const matches = str.match(modePatternGlobal); - if (matches) { - // Find where the last complete sequence ends - const lastMatch = matches[matches.length - 1]; - const lastMatchEnd = str.lastIndexOf(lastMatch) + lastMatch.length; - // If there's an ESC after all complete sequences, it's incomplete - const remainder = str.slice(lastMatchEnd); - if (remainder.includes(ESC)) { - return this.isSequenceComplete( - remainder.slice(remainder.indexOf(ESC)), - ); + // Look for potential incomplete sequences from the end + const lastEscIndex = data.lastIndexOf(ESC); + if (lastEscIndex === -1) return null; + + const afterLastEsc = data.slice(lastEscIndex); + + // Check if this looks like a sequence we track + + // Pattern: ESC[? - start of DECSET/DECRST + if (afterLastEsc.startsWith(`${ESC}[?`)) { + // Check if it's complete (ends with h or l after digits) + const completePattern = new RegExp(`${escEscaped}\\[\\?[0-9;]+[hl]`); + if (completePattern.test(afterLastEsc)) { + // Complete DECSET/DECRST - check if there's another incomplete after + const globalPattern = new RegExp(`${escEscaped}\\[\\?[0-9;]+[hl]`, "g"); + const matches = afterLastEsc.match(globalPattern); + if (matches) { + const lastMatch = matches[matches.length - 1]; + const lastMatchEnd = + afterLastEsc.lastIndexOf(lastMatch) + lastMatch.length; + const remainder = afterLastEsc.slice(lastMatchEnd); + if (remainder.includes(ESC)) { + return this.findIncompleteTrackedSequence(remainder); + } } - return true; + return null; // Complete } + // Incomplete DECSET/DECRST - buffer it + return afterLastEsc; } - // Check for complete OSC-7: ESC]7;...BEL or ESC]7;...ESC\ - if (str.includes(BEL) || str.includes(`${ESC}\\`)) { - // Might have complete OSC sequence - const osc7Pattern = new RegExp( - `${escEscaped}\\]7;[^${belEscaped}${escEscaped}]*(?:${belEscaped}|${escEscaped}\\\\)`, - ); - if (osc7Pattern.test(str)) { - return true; + // Pattern: ESC]7; - start of OSC-7 + if (afterLastEsc.startsWith(`${ESC}]7;`)) { + // Check if it's complete (ends with BEL or ESC\) + if (afterLastEsc.includes(BEL) || afterLastEsc.includes(`${ESC}\\`)) { + return null; // Complete } + // Incomplete OSC-7 - buffer it + return afterLastEsc; } - // Check for obviously incomplete patterns - // ESC alone, or ESC[, or ESC[?, or ESC[?123 (no terminator) - if (str === ESC) return false; - if (str === `${ESC}[`) return false; - if (str === `${ESC}]`) return false; - - // Incomplete mode sequence: ESC[?digits but no h/l - const incompleteModePattern = new RegExp(`^${escEscaped}\\[\\?[0-9;]*$`); - if (incompleteModePattern.test(str)) return false; - - // Incomplete OSC sequence: ESC]digit; but no BEL or ST - const incompleteOscPattern = new RegExp(`^${escEscaped}\\][0-9];`); - if ( - incompleteOscPattern.test(str) && - !str.includes(BEL) && - !str.includes(`${ESC}\\`) - ) { - return false; - } - - // If we got here with just ESC and some chars but no recognizable complete sequence, - // consider it incomplete if it looks like the start of a sequence we care about - const startsWithCsiOrOsc = new RegExp(`^${escEscaped}[\\[\\]]`); - if (startsWithCsiOrOsc.test(str)) return false; - - // Otherwise assume it's complete (might be some other sequence we don't track) - return true; + // Check for partial starts of tracked sequences + // These could become tracked sequences with more data + if (afterLastEsc === ESC) return afterLastEsc; // Just ESC + if (afterLastEsc === `${ESC}[`) return afterLastEsc; // ESC[ + if (afterLastEsc === `${ESC}]`) return afterLastEsc; // ESC] + if (afterLastEsc === `${ESC}]7`) return afterLastEsc; // ESC]7 + const incompleteDecset = new RegExp(`^${escEscaped}\\[\\?[0-9;]*$`); + if (incompleteDecset.test(afterLastEsc)) return afterLastEsc; // ESC[?123 + + // Not a sequence we track (e.g., ESC[31m, ESC[H) - don't buffer + return null; } /** diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 4f6639ccc04..7069fa500f9 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -408,10 +408,30 @@ export class DaemonTerminalManager extends EventEmitter { return { killed, failed }; } - getSessionCountByWorkspaceId(workspaceId: string): number { - return Array.from(this.sessions.values()).filter( + async getSessionCountByWorkspaceId(workspaceId: string): Promise { + // First check local sessions + const localCount = Array.from(this.sessions.values()).filter( (session) => session.workspaceId === workspaceId && session.isAlive, ).length; + + if (localCount > 0) { + return localCount; + } + + // If no local sessions, query daemon directly + // This handles the case where app restarted but daemon still has sessions + try { + const response = await this.client.listSessions(); + return response.sessions.filter( + (s) => s.workspaceId === workspaceId && s.isAlive, + ).length; + } catch (error) { + console.warn( + "[DaemonTerminalManager] Failed to query daemon for session count:", + error, + ); + return 0; + } } /** diff --git a/apps/desktop/src/main/lib/terminal/manager.test.ts b/apps/desktop/src/main/lib/terminal/manager.test.ts index e49cb8bfca5..f6d2c9d6146 100644 --- a/apps/desktop/src/main/lib/terminal/manager.test.ts +++ b/apps/desktop/src/main/lib/terminal/manager.test.ts @@ -664,12 +664,18 @@ describe("TerminalManager", () => { workspaceId: "other-workspace", }); - expect(manager.getSessionCountByWorkspaceId("workspace-count")).toBe(2); - expect(manager.getSessionCountByWorkspaceId("other-workspace")).toBe(1); + expect( + await manager.getSessionCountByWorkspaceId("workspace-count"), + ).toBe(2); + expect( + await manager.getSessionCountByWorkspaceId("other-workspace"), + ).toBe(1); }); - it("should return zero for non-existent workspace", () => { - expect(manager.getSessionCountByWorkspaceId("non-existent")).toBe(0); + it("should return zero for non-existent workspace", async () => { + expect(await manager.getSessionCountByWorkspaceId("non-existent")).toBe( + 0, + ); }); it("should not count dead sessions", async () => { @@ -695,7 +701,9 @@ describe("TerminalManager", () => { // Wait for state to update await new Promise((resolve) => setTimeout(resolve, 100)); - expect(manager.getSessionCountByWorkspaceId("workspace-mixed")).toBe(1); + expect( + await manager.getSessionCountByWorkspaceId("workspace-mixed"), + ).toBe(1); }); }); diff --git a/apps/desktop/src/main/lib/terminal/manager.ts b/apps/desktop/src/main/lib/terminal/manager.ts index 4541b75d664..84522cde550 100644 --- a/apps/desktop/src/main/lib/terminal/manager.ts +++ b/apps/desktop/src/main/lib/terminal/manager.ts @@ -378,7 +378,7 @@ export class TerminalManager extends EventEmitter { }); } - getSessionCountByWorkspaceId(workspaceId: string): number { + async getSessionCountByWorkspaceId(workspaceId: string): Promise { return Array.from(this.sessions.values()).filter( (session) => session.workspaceId === workspaceId && session.isAlive, ).length; diff --git a/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts b/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts index ebd13ad5aab..4e994c87957 100644 --- a/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts +++ b/apps/desktop/src/main/terminal-host/session-lifecycle.test.ts @@ -218,6 +218,34 @@ describe("Terminal Host Session Lifecycle", () => { }); } + /** + * Wait for a session to be ready (alive and accepting requests) + */ + async function waitForSessionReady( + socket: Socket, + sessionId: string, + timeoutMs = 3000, + ): Promise { + const startTime = Date.now(); + while (Date.now() - startTime < timeoutMs) { + const listRequest: IpcRequest = { + id: `list-${Date.now()}`, + type: "listSessions", + payload: undefined, + }; + const response = await sendRequest(socket, listRequest); + if (response.ok) { + const payload = response.payload as ListSessionsResponse; + const session = payload.sessions.find((s) => s.sessionId === sessionId); + if (session?.isAlive) { + return true; + } + } + await new Promise((r) => setTimeout(r, 100)); + } + return false; + } + /** * Authenticate with the daemon */ @@ -358,6 +386,11 @@ describe("Terminal Host Session Lifecycle", () => { ); } + // Wait for the session to be fully ready before attaching + // PTY spawn can be async and session needs to be alive for attach + const isReady = await waitForSessionReady(socket, "test-session-2"); + expect(isReady).toBe(true); + // Attach to same session const createRequest2: IpcRequest = { id: "test-create-2b", @@ -374,6 +407,10 @@ describe("Terminal Host Session Lifecycle", () => { }; const response2 = await sendRequest(socket, createRequest2); + if (!response2.ok) { + // Log error details for debugging + console.error("Attach failed:", JSON.stringify(response2, null, 2)); + } expect(response2.ok).toBe(true); if (response2.ok) { const payload = response2.payload as CreateOrAttachResponse; diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index 7428b4f2b99..2bb53414b96 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -72,6 +72,16 @@ export class TerminalHost { this.sessions.set(sessionId, session); isNew = true; + } else if (session.isAlive) { + // Attaching to existing session - resize to requested dimensions + // This ensures the snapshot reflects the client's current terminal size + // Note: Resize can fail if PTY is in a bad state (e.g., EBADF) + // We catch and ignore these errors since the session may still be usable + try { + session.resize(request.cols, request.rows); + } catch { + // Ignore resize failures - session may still be attachable + } } // Attach client to session (async to ensure pending writes are flushed) diff --git a/apps/desktop/src/main/windows/main.ts b/apps/desktop/src/main/windows/main.ts index fb29400b1a9..966e84614c1 100644 --- a/apps/desktop/src/main/windows/main.ts +++ b/apps/desktop/src/main/windows/main.ts @@ -17,7 +17,7 @@ import { notificationsApp, notificationsEmitter, } from "../lib/notifications/server"; -import { terminalManager } from "../lib/terminal"; +import { getActiveTerminalManager } from "../lib/terminal"; // Singleton IPC handler to prevent duplicate handlers on window reopen (macOS) let ipcHandler: ReturnType | null = null; @@ -164,7 +164,7 @@ export async function MainWindow() { server.close(); notificationsEmitter.removeAllListeners(); // Remove terminal listeners to prevent duplicates when window reopens on macOS - terminalManager.detachAllListeners(); + getActiveTerminalManager().detachAllListeners(); // Detach window from IPC handler (handler stays alive for window reopen) ipcHandler?.detachWindow(window); // Clear current window reference From 1f86a6573259f8dca6bbf0b31d02980e8b58fdd5 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 08:10:07 +0200 Subject: [PATCH 05/51] fix(desktop): address third round of PR review feedback - P0: Fix dead sessions - dispose and recreate when session exists but !isAlive Also improved cleanup: reschedule if clients attached, cleanup on detach - P1: Fix snapshot restore order - rehydrateSequences BEFORE snapshotAnsi (matches headless emulator's applySnapshot order for correct TUI restoration) - P1: Fix stale PID reuse - check socket liveness first, then clean up stale PID (prevents daemon startup failure when PID is reused by another process) - P2: Centralize socket disconnect handling in daemon handleConnection (avoids per-session socket listeners that could cause MaxListenersExceeded) --- .../src/main/lib/terminal-host/client.ts | 45 +++++----------- apps/desktop/src/main/terminal-host/index.ts | 9 +++- .../desktop/src/main/terminal-host/session.ts | 10 ++-- .../src/main/terminal-host/terminal-host.ts | 53 +++++++++++++++++-- .../TabsContent/Terminal/Terminal.tsx | 12 +++-- 5 files changed, 79 insertions(+), 50 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index b31a26f1cca..dce65c558e7 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -425,19 +425,8 @@ export class TerminalHostClient extends EventEmitter { * Spawn the daemon process if not running */ private async spawnDaemon(): Promise { - // Check if daemon is already running via PID file - if (this.isDaemonRunning()) { - console.log( - "[TerminalHostClient] Daemon already running (PID file exists)", - ); - // Daemon is running but socket might be stale - // Give it a moment and return - await this.sleep(500); - return; - } - - // Check if socket is live before removing it - // This prevents orphaning a running daemon that just doesn't have a PID file + // Check if socket is live first - this is the authoritative check + // PID file can be stale if daemon crashed and PID was reused by another process if (existsSync(SOCKET_PATH)) { const isLive = await this.isSocketLive(); if (isLive) { @@ -454,6 +443,17 @@ export class TerminalHostClient extends EventEmitter { } } + // Also clean up stale PID file if socket was not live + // This handles the case where daemon crashed and PID was reused + if (existsSync(PID_PATH)) { + console.log("[TerminalHostClient] Removing stale PID file"); + try { + unlinkSync(PID_PATH); + } catch { + // Ignore - might not have permission + } + } + // Acquire spawn lock to prevent concurrent spawns if (!this.acquireSpawnLock()) { console.log("[TerminalHostClient] Another spawn in progress, waiting..."); @@ -503,25 +503,6 @@ export class TerminalHostClient extends EventEmitter { } } - /** - * Check if daemon process is running - */ - private isDaemonRunning(): boolean { - if (!existsSync(PID_PATH)) { - return false; - } - - try { - const pid = Number.parseInt(readFileSync(PID_PATH, "utf-8").trim(), 10); - // Check if process exists (kill with signal 0) - process.kill(pid, 0); - return true; - } catch { - // Process doesn't exist or no permission - return false; - } - } - /** * Get path to daemon script */ diff --git a/apps/desktop/src/main/terminal-host/index.ts b/apps/desktop/src/main/terminal-host/index.ts index beb5638161b..bf2e5876579 100644 --- a/apps/desktop/src/main/terminal-host/index.ts +++ b/apps/desktop/src/main/terminal-host/index.ts @@ -363,9 +363,14 @@ function handleConnection(socket: Socket) { } }); - socket.on("close", () => { + const handleDisconnect = () => { log("info", `Client disconnected: ${remoteId}`); - }); + // Detach this socket from all sessions it was attached to + // This is centralized here to avoid per-session socket listeners + terminalHost.detachFromAllSessions(socket); + }; + + socket.on("close", handleDisconnect); socket.on("error", (error) => { log("error", `Socket error for ${remoteId}`, { error: error.message }); diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index e9b7e86e7a5..2ff403eadec 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -186,6 +186,9 @@ export class Session { /** * Attach a client to this session * Returns a snapshot after flushing any pending writes to ensure consistency + * + * Note: Socket disconnect handling is centralized in the daemon's handleConnection + * to avoid adding per-session listeners which could cause MaxListenersExceededWarning */ async attach(socket: Socket): Promise { if (this.disposed) { @@ -199,13 +202,6 @@ export class Session { }); this.lastAttachedAt = new Date(); - // Handle client disconnect - const cleanup = () => { - this.attachedClients.delete(socket); - }; - socket.once("close", cleanup); - socket.once("error", cleanup); - // Return current snapshot after flushing pending writes // This ensures any output produced while no clients were attached is included return this.emulator.getSnapshotAsync(); diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index 2bb53414b96..b3e9f793fe0 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -42,6 +42,13 @@ export class TerminalHost { let session = this.sessions.get(sessionId); let isNew = false; + // If session exists but is dead, dispose it and create a new one + if (session && !session.isAlive) { + session.dispose(); + this.sessions.delete(sessionId); + session = undefined; + } + if (!session) { // Create new session session = createSession(request); @@ -72,8 +79,8 @@ export class TerminalHost { this.sessions.set(sessionId, session); isNew = true; - } else if (session.isAlive) { - // Attaching to existing session - resize to requested dimensions + } else { + // Attaching to existing live session - resize to requested dimensions // This ensures the snapshot reflects the client's current terminal size // Note: Resize can fail if PTY is in a bad state (e.g., EBADF) // We catch and ignore these errors since the session may still be usable @@ -119,6 +126,11 @@ export class TerminalHost { const session = this.sessions.get(request.sessionId); if (session) { session.detach(socket); + // Clean up dead sessions when last client detaches + if (!session.isAlive && session.clientCount === 0) { + session.dispose(); + this.sessions.delete(request.sessionId); + } } return { success: true }; } @@ -170,6 +182,21 @@ export class TerminalHost { return { success: true }; } + /** + * Detach a socket from all sessions it's attached to + * Called when a client connection closes + */ + detachFromAllSessions(socket: Socket): void { + for (const [sessionId, session] of this.sessions.entries()) { + session.detach(socket); + // Clean up dead sessions when last client detaches + if (!session.isAlive && session.clientCount === 0) { + session.dispose(); + this.sessions.delete(sessionId); + } + } + } + /** * Clean up all sessions on shutdown */ @@ -204,12 +231,30 @@ export class TerminalHost { _signal?: number, ): void { // Keep session around for a bit so clients can see exit status - // Then clean up + // Then clean up (reschedule if clients still attached) + this.scheduleSessionCleanup(sessionId); + } + + /** + * Schedule cleanup of a dead session + * Reschedules if clients are still attached + */ + private scheduleSessionCleanup(sessionId: string): void { setTimeout(() => { const session = this.sessions.get(sessionId); - if (session && !session.isAlive && session.clientCount === 0) { + if (!session || session.isAlive) { + // Session was recreated or is alive, nothing to clean up + return; + } + + if (session.clientCount === 0) { + // No clients attached, safe to clean up session.dispose(); this.sessions.delete(sessionId); + } else { + // Clients still attached, reschedule cleanup + // They'll see the exit status and can restart + this.scheduleSessionCleanup(sessionId); } }, 5000); } diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 236b5dd306a..5b1dd0e566c 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -307,14 +307,16 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { scrollbackLines: number; }; }) => { - xterm.write(result.scrollback); - updateCwdRef.current(result.scrollback); - - // Apply rehydration sequences to restore terminal modes (e.g., alternate screen for TUI apps) - // This must come after the scrollback content to properly restore the terminal state + // Apply rehydration sequences FIRST to restore terminal modes + // (e.g., alternate screen, app cursor mode, bracketed paste) + // This must come before the scrollback content for correct TUI restoration if (result.snapshot?.rehydrateSequences) { xterm.write(result.snapshot.rehydrateSequences); } + + // Then apply the scrollback content + xterm.write(result.scrollback); + updateCwdRef.current(result.scrollback); }; const restartTerminal = () => { From f215614dcf41b23192176bfebeb6b6540a64aef0 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 09:11:22 +0200 Subject: [PATCH 06/51] fix(desktop): query daemon as source of truth for workspace sessions - killByWorkspaceId now always queries daemon for authoritative session list - getSessionCountByWorkspaceId now always queries daemon first - Fixes orphan sessions when users partially reattach after app restart --- .../src/main/lib/terminal/daemon-manager.ts | 67 ++++++++----------- 1 file changed, 27 insertions(+), 40 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 7069fa500f9..e14ee19717c 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -352,39 +352,32 @@ export class DaemonTerminalManager extends EventEmitter { async killByWorkspaceId( workspaceId: string, ): Promise<{ killed: number; failed: number }> { - // Collect paneIds to kill (from local state or daemon) - let paneIdsToKill: string[] = []; + // Always query daemon for the authoritative list of sessions + // Local sessions map may be incomplete after app restart + const paneIdsToKill = new Set(); - // First check local sessions map - const localSessions = Array.from(this.sessions.entries()).filter( - ([, session]) => session.workspaceId === workspaceId, - ); - paneIdsToKill = localSessions.map(([paneId]) => paneId); - - // If no local sessions, query daemon directly - // This handles the case where app restarted but daemon still has sessions - if (paneIdsToKill.length === 0) { - try { - const response = await this.client.listSessions(); - const daemonSessions = response.sessions.filter( - (s) => s.workspaceId === workspaceId && s.isAlive, - ); - - if (daemonSessions.length > 0) { - console.log( - `[DaemonTerminalManager] Found ${daemonSessions.length} orphaned daemon sessions for workspace ${workspaceId}`, - ); - paneIdsToKill = daemonSessions.map((s) => s.paneId); + // Query daemon for all sessions in this workspace + try { + const response = await this.client.listSessions(); + for (const session of response.sessions) { + if (session.workspaceId === workspaceId && session.isAlive) { + paneIdsToKill.add(session.paneId); + } + } + } catch (error) { + console.warn( + "[DaemonTerminalManager] Failed to query daemon for sessions:", + error, + ); + // Fall back to local sessions if daemon query fails + for (const [paneId, session] of this.sessions.entries()) { + if (session.workspaceId === workspaceId) { + paneIdsToKill.add(paneId); } - } catch (error) { - console.warn( - "[DaemonTerminalManager] Failed to query daemon for sessions:", - error, - ); } } - if (paneIdsToKill.length === 0) { + if (paneIdsToKill.size === 0) { return { killed: 0, failed: 0 }; } @@ -409,17 +402,8 @@ export class DaemonTerminalManager extends EventEmitter { } async getSessionCountByWorkspaceId(workspaceId: string): Promise { - // First check local sessions - const localCount = Array.from(this.sessions.values()).filter( - (session) => session.workspaceId === workspaceId && session.isAlive, - ).length; - - if (localCount > 0) { - return localCount; - } - - // If no local sessions, query daemon directly - // This handles the case where app restarted but daemon still has sessions + // Always query daemon for the authoritative count + // Local sessions map may be incomplete after app restart try { const response = await this.client.listSessions(); return response.sessions.filter( @@ -430,7 +414,10 @@ export class DaemonTerminalManager extends EventEmitter { "[DaemonTerminalManager] Failed to query daemon for session count:", error, ); - return 0; + // Fall back to local sessions if daemon query fails + return Array.from(this.sessions.values()).filter( + (session) => session.workspaceId === workspaceId && session.isAlive, + ).length; } } From 822281f2a38002df150ad0f434d419a243a8c3f5 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 09:22:41 +0200 Subject: [PATCH 07/51] feat(desktop): add daemon restart button to Terminal settings - Add shutdown IPC request type to daemon protocol - Add shutdown handler to daemon (graceful shutdown after response) - Add shutdown() method to terminal host client - Add restartDaemon tRPC endpoint in settings router - Add 'Restart Daemon' button in Terminal settings (visible when persistence enabled) This allows users to restart the daemon to pick up new code after app updates. --- .../src/lib/trpc/routers/settings/index.ts | 30 +++++++++++++++ .../src/main/lib/terminal-host/client.ts | 17 +++++++++ .../src/main/lib/terminal-host/types.ts | 9 +++++ apps/desktop/src/main/terminal-host/index.ts | 26 +++++++++++++ .../SettingsView/TerminalSettings.tsx | 38 +++++++++++++++++++ 5 files changed, 120 insertions(+) diff --git a/apps/desktop/src/lib/trpc/routers/settings/index.ts b/apps/desktop/src/lib/trpc/routers/settings/index.ts index c75eab773cd..1b782960427 100644 --- a/apps/desktop/src/lib/trpc/routers/settings/index.ts +++ b/apps/desktop/src/lib/trpc/routers/settings/index.ts @@ -4,6 +4,10 @@ import { type TerminalPreset, } from "@superset/local-db"; import { localDb } from "main/lib/local-db"; +import { + disposeTerminalHostClient, + getTerminalHostClient, +} from "main/lib/terminal-host/client"; import { DEFAULT_CONFIRM_ON_QUIT, DEFAULT_NAVIGATION_STYLE, @@ -249,5 +253,31 @@ export const createSettingsRouter = () => { return { success: true }; }), + + /** + * Restart the terminal host daemon. + * This shuts down the current daemon and disposes the client. + * A new daemon will be spawned automatically on the next terminal operation. + * + * NOTE: This will NOT kill existing terminal sessions - they will be + * orphaned and the daemon will exit after cleaning them up. + */ + restartDaemon: publicProcedure.mutation(async () => { + try { + const client = getTerminalHostClient(); + // Request daemon shutdown (will kill sessions and exit) + await client.shutdown({ killSessions: true }); + } catch (error) { + console.warn( + "[settings] Daemon shutdown request failed (may already be stopped):", + error, + ); + } + + // Dispose the client so a new one is created on next use + disposeTerminalHostClient(); + + return { success: true }; + }), }); }; diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index dce65c558e7..9808196bf66 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -38,6 +38,7 @@ import { type ListSessionsResponse, PROTOCOL_VERSION, type ResizeRequest, + type ShutdownRequest, type TerminalDataEvent, type TerminalExitEvent, type WriteRequest, @@ -648,6 +649,22 @@ export class TerminalHostClient extends EventEmitter { )) as EmptyResponse; } + /** + * Shutdown the daemon gracefully. + * After calling this, the client should be disposed and a new daemon + * will be spawned on the next getTerminalHostClient() call. + */ + async shutdown(request: ShutdownRequest = {}): Promise { + await this.ensureConnected(); + const response = (await this.sendRequest( + "shutdown", + request, + )) as EmptyResponse; + // Disconnect after shutdown request is sent + this.disconnect(); + return response; + } + /** * Disconnect from daemon (but don't stop it) */ diff --git a/apps/desktop/src/main/lib/terminal-host/types.ts b/apps/desktop/src/main/lib/terminal-host/types.ts index 7ee82f8d96a..19734616cad 100644 --- a/apps/desktop/src/main/lib/terminal-host/types.ts +++ b/apps/desktop/src/main/lib/terminal-host/types.ts @@ -213,6 +213,14 @@ export interface ClearScrollbackRequest { sessionId: string; } +/** + * Shutdown the daemon gracefully + */ +export interface ShutdownRequest { + /** Optional: Kill all sessions before shutdown (default: false) */ + killSessions?: boolean; +} + // ============================================================================= // IPC Message Framing // ============================================================================= @@ -300,4 +308,5 @@ export type RequestTypeMap = { killAll: { request: KillAllRequest; response: EmptyResponse }; listSessions: { request: undefined; response: ListSessionsResponse }; clearScrollback: { request: ClearScrollbackRequest; response: EmptyResponse }; + shutdown: { request: ShutdownRequest; response: EmptyResponse }; }; diff --git a/apps/desktop/src/main/terminal-host/index.ts b/apps/desktop/src/main/terminal-host/index.ts index bf2e5876579..255c8c3fbaf 100644 --- a/apps/desktop/src/main/terminal-host/index.ts +++ b/apps/desktop/src/main/terminal-host/index.ts @@ -37,6 +37,7 @@ import { type KillRequest, PROTOCOL_VERSION, type ResizeRequest, + type ShutdownRequest, type WriteRequest, } from "../lib/terminal-host/types"; import { TerminalHost } from "./terminal-host"; @@ -313,6 +314,31 @@ const handlers: Record = { const response = terminalHost.clearScrollback(request); sendSuccess(socket, id, response); }, + + shutdown: (socket, id, payload, clientState) => { + if (!clientState.authenticated) { + sendError(socket, id, "NOT_AUTHENTICATED", "Must authenticate first"); + return; + } + + const request = payload as ShutdownRequest; + log("info", "Shutdown requested via IPC", { + killSessions: request.killSessions, + }); + + // Send success response before shutting down + sendSuccess(socket, id, { success: true }); + + // Kill sessions if requested + if (request.killSessions) { + terminalHost.killAll({ deleteHistory: false }); + } + + // Schedule shutdown after a brief delay to allow response to be sent + setTimeout(() => { + stopServer().then(() => process.exit(0)); + }, 100); + }, }; function handleRequest( diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx index c93d97fe9d1..8cc93744710 100644 --- a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx @@ -1,4 +1,6 @@ +import { Button } from "@superset/ui/button"; import { Label } from "@superset/ui/label"; +import { toast } from "@superset/ui/sonner"; import { Switch } from "@superset/ui/switch"; import { trpc } from "renderer/lib/trpc"; @@ -32,10 +34,28 @@ export function TerminalSettings() { }, }); + const restartDaemon = trpc.settings.restartDaemon.useMutation({ + onSuccess: () => { + toast.success("Terminal daemon restarted", { + description: + "A new daemon will start automatically when you open a terminal.", + }); + }, + onError: (error) => { + toast.error("Failed to restart daemon", { + description: error.message, + }); + }, + }); + const handleToggle = (enabled: boolean) => { setTerminalPersistence.mutate({ enabled }); }; + const handleRestartDaemon = () => { + restartDaemon.mutate(); + }; + return (
@@ -69,6 +89,24 @@ export function TerminalSettings() { disabled={isLoading || setTerminalPersistence.isPending} />
+ + {/* Daemon Management - only show when persistence is enabled */} + {terminalPersistence && ( +
+

Terminal Daemon

+

+ Restart the terminal daemon to pick up new code after an app + update. This will close all terminal sessions. +

+ +
+ )}
); From f6967de6d8780a2cfb2e1d16e37db0fb8ea0d00a Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 10:06:43 +0200 Subject: [PATCH 08/51] fix(desktop): externalize @xterm/headless in vite config --- apps/desktop/electron.vite.config.ts | 1 + 1 file changed, 1 insertion(+) diff --git a/apps/desktop/electron.vite.config.ts b/apps/desktop/electron.vite.config.ts index 64a0e3801e7..a539c2e4c72 100644 --- a/apps/desktop/electron.vite.config.ts +++ b/apps/desktop/electron.vite.config.ts @@ -118,6 +118,7 @@ export default defineConfig({ "electron", "better-sqlite3", // Native module - must stay external "node-pty", // Native module - must stay external + "@xterm/headless", // Terminal headless emulator for daemon /^@sentry\/electron/, ], }, From 519f6e90cdd9a829642e6fde4aeb73a28df09c86 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 10:11:32 +0200 Subject: [PATCH 09/51] revert: remove @xterm/headless from externals @xterm/headless is a pure JS package that should be bundled, not externalized. Only native modules (better-sqlite3, node-pty) need to be external. Externalizing @xterm/headless caused the daemon to crash on startup because it couldn't find the module. --- apps/desktop/electron.vite.config.ts | 1 - 1 file changed, 1 deletion(-) diff --git a/apps/desktop/electron.vite.config.ts b/apps/desktop/electron.vite.config.ts index a539c2e4c72..64a0e3801e7 100644 --- a/apps/desktop/electron.vite.config.ts +++ b/apps/desktop/electron.vite.config.ts @@ -118,7 +118,6 @@ export default defineConfig({ "electron", "better-sqlite3", // Native module - must stay external "node-pty", // Native module - must stay external - "@xterm/headless", // Terminal headless emulator for daemon /^@sentry\/electron/, ], }, From bcd67e4fc9d855e307fc968a040174b98949737f Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 10:52:09 +0200 Subject: [PATCH 10/51] fix(desktop): add timeout to daemon connection polling to prevent terminal hang - Add ConnectionState enum to replace boolean flag for clearer state management - Add 10-second timeout to ensureConnected() polling loop that was hanging forever - Properly set state to DISCONNECTED on connection failure for error recovery - Add error UI with retry button in Terminal component when connection fails Fixes terminal hang on initial app load when multiple terminals connect simultaneously. --- .../src/main/lib/terminal-host/client.ts | 52 +++++++++++++---- .../TabsContent/Terminal/Terminal.tsx | 58 ++++++++++++++++++- 2 files changed, 98 insertions(+), 12 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 9808196bf66..36dffbcf961 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -44,6 +44,16 @@ import { type WriteRequest, } from "./types"; +// ============================================================================= +// Connection State +// ============================================================================= + +enum ConnectionState { + DISCONNECTED = "disconnected", + CONNECTING = "connecting", + CONNECTED = "connected", +} + // ============================================================================= // Configuration // ============================================================================= @@ -126,7 +136,7 @@ export class TerminalHostClient extends EventEmitter { private pendingRequests = new Map(); private requestCounter = 0; private authenticated = false; - private connecting = false; + private connectionState = ConnectionState.DISCONNECTED; private disposed = false; // =========================================================================== @@ -138,22 +148,40 @@ export class TerminalHostClient extends EventEmitter { * Spawns daemon if needed. */ async ensureConnected(): Promise { - if (this.socket && this.authenticated) { + // Already connected - fast path + if ( + this.connectionState === ConnectionState.CONNECTED && + this.socket && + this.authenticated + ) { console.log("[TerminalHostClient] Already connected and authenticated"); return; } - if (this.connecting) { + // Another connection in progress - wait with timeout + if (this.connectionState === ConnectionState.CONNECTING) { console.log( "[TerminalHostClient] Connection already in progress, waiting...", ); - // Wait for existing connection attempt return new Promise((resolve, reject) => { + const startTime = Date.now(); + const WAIT_TIMEOUT_MS = 10000; // 10 seconds max wait + const checkConnection = () => { - if (this.socket && this.authenticated) { + if ( + this.connectionState === ConnectionState.CONNECTED && + this.socket && + this.authenticated + ) { resolve(); - } else if (!this.connecting) { - reject(new Error("Connection failed")); + } else if (this.connectionState === ConnectionState.DISCONNECTED) { + reject(new Error("Connection failed while waiting")); + } else if (Date.now() - startTime > WAIT_TIMEOUT_MS) { + reject( + new Error( + "Timeout waiting for connection - daemon may be unresponsive", + ), + ); } else { setTimeout(checkConnection, 100); } @@ -162,7 +190,7 @@ export class TerminalHostClient extends EventEmitter { }); } - this.connecting = true; + this.connectionState = ConnectionState.CONNECTING; console.log("[TerminalHostClient] Connecting to daemon..."); try { @@ -190,8 +218,11 @@ export class TerminalHostClient extends EventEmitter { console.log("[TerminalHostClient] Authenticating..."); await this.authenticate(); console.log("[TerminalHostClient] Authentication successful!"); - } finally { - this.connecting = false; + + this.connectionState = ConnectionState.CONNECTED; + } catch (error) { + this.connectionState = ConnectionState.DISCONNECTED; + throw error; } } @@ -305,6 +336,7 @@ export class TerminalHostClient extends EventEmitter { private handleDisconnect(): void { this.socket = null; this.authenticated = false; + this.connectionState = ConnectionState.DISCONNECTED; // Reject all pending requests for (const [id, pending] of this.pendingRequests.entries()) { diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 5b1dd0e566c..50036b2dac5 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -44,6 +44,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const [isSearchOpen, setIsSearchOpen] = useState(false); const [terminalCwd, setTerminalCwd] = useState(null); const [cwdConfirmed, setCwdConfirmed] = useState(false); + const [connectionError, setConnectionError] = useState(null); const setFocusedPane = useTabsStore((s) => s.setFocusedPane); const setTabAutoTitle = useTabsStore((s) => s.setTabAutoTitle); const updatePaneCwd = useTabsStore((s) => s.updatePaneCwd); @@ -177,6 +178,40 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { useTerminalCallbacksStore.getState().unregisterClearCallback, ); + const handleRetryConnection = useCallback(() => { + setConnectionError(null); + const xterm = xtermRef.current; + if (!xterm) return; + + xterm.clear(); + xterm.writeln("Retrying connection...\r\n"); + + createOrAttachRef.current( + { + paneId, + tabId: parentTabIdRef.current || paneId, + workspaceId, + cols: xterm.cols, + rows: xterm.rows, + }, + { + onSuccess: (result) => { + setConnectionError(null); + // Apply rehydration sequences first + if (result.snapshot?.rehydrateSequences) { + xterm.write(result.snapshot.rehydrateSequences); + } + xterm.write(result.scrollback); + setSubscriptionEnabled(true); + }, + onError: (error) => { + setConnectionError(error.message || "Connection failed"); + setSubscriptionEnabled(true); + }, + }, + ); + }, [paneId, workspaceId]); + const parentTabIdRef = useRef(parentTabId); parentTabIdRef.current = parentTabId; @@ -337,7 +372,9 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { setSubscriptionEnabled(true); flushPendingEvents(); }, - onError: () => { + onError: (error) => { + console.error("[Terminal] Failed to restart:", error); + setConnectionError(error.message || "Failed to restart terminal"); setSubscriptionEnabled(true); }, }, @@ -401,7 +438,9 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { setSubscriptionEnabled(true); flushPendingEvents(); }, - onError: () => { + onError: (error) => { + console.error("[Terminal] Failed to create/attach:", error); + setConnectionError(error.message || "Failed to connect to terminal"); setSubscriptionEnabled(true); }, }, @@ -520,6 +559,21 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { isOpen={isSearchOpen} onClose={() => setIsSearchOpen(false)} /> + {connectionError && ( +
+
+

Connection Error

+

{connectionError}

+
+ +
+ )}
); From 24edda178420e9945dfb2a83e004b354f4880f54 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 11:12:40 +0200 Subject: [PATCH 11/51] fix(desktop): force terminal refresh after scrollback restore xterm.write() is asynchronous - escape sequences may not be fully processed when the terminal first renders, causing garbled display. Force a re-render after write completes to ensure correct display. Symptom: restored terminals showed corrupted text until panel was resized. --- .../ContentView/TabsContent/Terminal/Terminal.tsx | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 50036b2dac5..fb6bb71d337 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -349,8 +349,13 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { xterm.write(result.snapshot.rehydrateSequences); } - // Then apply the scrollback content - xterm.write(result.scrollback); + // xterm.write() is asynchronous - escape sequences may not be fully + // processed when the terminal first renders, causing garbled display. + // Force a re-render after write completes to ensure correct display. + // (Symptom: restored terminals show corrupted text until resized) + xterm.write(result.scrollback, () => { + xterm.refresh(0, xterm.rows - 1); + }); updateCwdRef.current(result.scrollback); }; From e194f6dc6ee2267ac54b9c16686a66e485a55b84 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 11:22:41 +0200 Subject: [PATCH 12/51] fix(desktop): use fitAddon.fit() with requestAnimationFrame for terminal refresh The previous xterm.refresh() approach wasn't working because the write callback fires when data is parsed, not when it's rendered. Using fitAddon.fit() inside requestAnimationFrame ensures we're after the render cycle, triggering a full re-layout that fixes the garbled display. Also fixed handleRetryConnection which was missing the refresh fix. --- .../ContentView/TabsContent/Terminal/Terminal.tsx | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index fb6bb71d337..ab80943735e 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -181,6 +181,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const handleRetryConnection = useCallback(() => { setConnectionError(null); const xterm = xtermRef.current; + const fitAddon = fitAddonRef.current; if (!xterm) return; xterm.clear(); @@ -201,7 +202,12 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (result.snapshot?.rehydrateSequences) { xterm.write(result.snapshot.rehydrateSequences); } - xterm.write(result.scrollback); + // Force re-render after write completes + xterm.write(result.scrollback, () => { + requestAnimationFrame(() => { + fitAddon?.fit(); + }); + }); setSubscriptionEnabled(true); }, onError: (error) => { @@ -353,8 +359,11 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // processed when the terminal first renders, causing garbled display. // Force a re-render after write completes to ensure correct display. // (Symptom: restored terminals show corrupted text until resized) + // Using fitAddon.fit() which triggers a full re-layout and re-render. xterm.write(result.scrollback, () => { - xterm.refresh(0, xterm.rows - 1); + requestAnimationFrame(() => { + fitAddon.fit(); + }); }); updateCwdRef.current(result.scrollback); }; From d0e3d5ceeb51b74cc49d5f4ae77cd6171b1b4841 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 12:09:28 +0200 Subject: [PATCH 13/51] fix(desktop): dispose DaemonTerminalManager when restarting daemon The DaemonTerminalManager singleton caches a reference to the TerminalHostClient. When restartDaemon disposes the client, the manager still held the old disposed client reference, causing all terminal operations to hang. Fix: - Add disposeDaemonManager() function to reset the manager singleton - Call it from restartDaemon alongside disposeTerminalHostClient() - Also fix disconnect() to set connectionState to DISCONNECTED --- apps/desktop/src/lib/trpc/routers/settings/index.ts | 6 +++++- apps/desktop/src/main/lib/terminal-host/client.ts | 1 + apps/desktop/src/main/lib/terminal/daemon-manager.ts | 12 ++++++++++++ 3 files changed, 18 insertions(+), 1 deletion(-) diff --git a/apps/desktop/src/lib/trpc/routers/settings/index.ts b/apps/desktop/src/lib/trpc/routers/settings/index.ts index 1b782960427..419fe4ee67a 100644 --- a/apps/desktop/src/lib/trpc/routers/settings/index.ts +++ b/apps/desktop/src/lib/trpc/routers/settings/index.ts @@ -4,6 +4,7 @@ import { type TerminalPreset, } from "@superset/local-db"; import { localDb } from "main/lib/local-db"; +import { disposeDaemonManager } from "main/lib/terminal/daemon-manager"; import { disposeTerminalHostClient, getTerminalHostClient, @@ -274,8 +275,11 @@ export const createSettingsRouter = () => { ); } - // Dispose the client so a new one is created on next use + // Dispose both the client and the daemon manager so fresh instances + // are created on next use. The manager caches a client reference, + // so it must be disposed when the client is disposed. disposeTerminalHostClient(); + disposeDaemonManager(); return { success: true }; }), diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 36dffbcf961..fc05a7139db 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -706,6 +706,7 @@ export class TerminalHostClient extends EventEmitter { this.socket = null; } this.authenticated = false; + this.connectionState = ConnectionState.DISCONNECTED; } /** diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index e14ee19717c..671fbc1e004 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -484,3 +484,15 @@ export function getDaemonTerminalManager(): DaemonTerminalManager { } return daemonManager; } + +/** + * Dispose the daemon manager singleton. + * Must be called when the terminal host client is disposed (e.g., daemon restart) + * to ensure the manager gets a fresh client reference on next use. + */ +export function disposeDaemonManager(): void { + if (daemonManager) { + daemonManager.removeAllListeners(); + daemonManager = null; + } +} From 437d420b1fc54169541d48ea7dba564a6c850fe3 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 12:23:08 +0200 Subject: [PATCH 14/51] fix(desktop): reload window after daemon restart to clear stale terminal state Existing mounted terminals don't detect daemon restart - their tRPC subscriptions just stop receiving data silently. Reloading the window ensures all terminal components get fresh state and can reconnect to the new daemon. --- .../main/components/SettingsView/TerminalSettings.tsx | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx index 8cc93744710..d4c8441d25d 100644 --- a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx @@ -37,9 +37,13 @@ export function TerminalSettings() { const restartDaemon = trpc.settings.restartDaemon.useMutation({ onSuccess: () => { toast.success("Terminal daemon restarted", { - description: - "A new daemon will start automatically when you open a terminal.", + description: "Reloading window to reset terminal connections...", }); + // Reload the window after a short delay to let the toast show + // This ensures all terminal components get fresh state + setTimeout(() => { + window.location.reload(); + }, 1500); }, onError: (error) => { toast.error("Failed to restart daemon", { From d04c37736990ab98662478e724fa348508b737dc Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 12:29:01 +0200 Subject: [PATCH 15/51] refactor(desktop): remove restart daemon button for v1 simplicity Manual recovery via 'pkill -f terminal-host' if daemon becomes unresponsive. Daemon will respawn automatically on next terminal operation. Auto-recovery can be implemented in v2 if users report frequent issues. --- .../src/lib/trpc/routers/settings/index.ts | 34 --------------- .../SettingsView/TerminalSettings.tsx | 42 ------------------- 2 files changed, 76 deletions(-) diff --git a/apps/desktop/src/lib/trpc/routers/settings/index.ts b/apps/desktop/src/lib/trpc/routers/settings/index.ts index 419fe4ee67a..c75eab773cd 100644 --- a/apps/desktop/src/lib/trpc/routers/settings/index.ts +++ b/apps/desktop/src/lib/trpc/routers/settings/index.ts @@ -4,11 +4,6 @@ import { type TerminalPreset, } from "@superset/local-db"; import { localDb } from "main/lib/local-db"; -import { disposeDaemonManager } from "main/lib/terminal/daemon-manager"; -import { - disposeTerminalHostClient, - getTerminalHostClient, -} from "main/lib/terminal-host/client"; import { DEFAULT_CONFIRM_ON_QUIT, DEFAULT_NAVIGATION_STYLE, @@ -254,34 +249,5 @@ export const createSettingsRouter = () => { return { success: true }; }), - - /** - * Restart the terminal host daemon. - * This shuts down the current daemon and disposes the client. - * A new daemon will be spawned automatically on the next terminal operation. - * - * NOTE: This will NOT kill existing terminal sessions - they will be - * orphaned and the daemon will exit after cleaning them up. - */ - restartDaemon: publicProcedure.mutation(async () => { - try { - const client = getTerminalHostClient(); - // Request daemon shutdown (will kill sessions and exit) - await client.shutdown({ killSessions: true }); - } catch (error) { - console.warn( - "[settings] Daemon shutdown request failed (may already be stopped):", - error, - ); - } - - // Dispose both the client and the daemon manager so fresh instances - // are created on next use. The manager caches a client reference, - // so it must be disposed when the client is disposed. - disposeTerminalHostClient(); - disposeDaemonManager(); - - return { success: true }; - }), }); }; diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx index d4c8441d25d..c93d97fe9d1 100644 --- a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx @@ -1,6 +1,4 @@ -import { Button } from "@superset/ui/button"; import { Label } from "@superset/ui/label"; -import { toast } from "@superset/ui/sonner"; import { Switch } from "@superset/ui/switch"; import { trpc } from "renderer/lib/trpc"; @@ -34,32 +32,10 @@ export function TerminalSettings() { }, }); - const restartDaemon = trpc.settings.restartDaemon.useMutation({ - onSuccess: () => { - toast.success("Terminal daemon restarted", { - description: "Reloading window to reset terminal connections...", - }); - // Reload the window after a short delay to let the toast show - // This ensures all terminal components get fresh state - setTimeout(() => { - window.location.reload(); - }, 1500); - }, - onError: (error) => { - toast.error("Failed to restart daemon", { - description: error.message, - }); - }, - }); - const handleToggle = (enabled: boolean) => { setTerminalPersistence.mutate({ enabled }); }; - const handleRestartDaemon = () => { - restartDaemon.mutate(); - }; - return (
@@ -93,24 +69,6 @@ export function TerminalSettings() { disabled={isLoading || setTerminalPersistence.isPending} />
- - {/* Daemon Management - only show when persistence is enabled */} - {terminalPersistence && ( -
-

Terminal Daemon

-

- Restart the terminal daemon to pick up new code after an app - update. This will close all terminal sessions. -

- -
- )}
); From fd9aa2257752bd440c19276be5f4295ed6ee1caa Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 12:44:14 +0200 Subject: [PATCH 16/51] fix(desktop): detect daemon disconnect and show error UI in existing terminals When the daemon is killed or crashes, existing terminals now: - Receive disconnect events through tRPC subscription - Show error overlay with 'Retry Connection' button - Can reconnect when daemon respawns Changes: - DaemonTerminalManager emits disconnect events for all sessions on client disconnect - Terminal router forwards disconnect events through stream subscription - Terminal.tsx handles disconnect event to show error UI --- .../src/lib/trpc/routers/terminal/terminal.ts | 7 +++++++ .../src/main/lib/terminal/daemon-manager.ts | 17 ++++++++++++++++- .../TabsContent/Terminal/Terminal.tsx | 9 ++++++++- .../ContentView/TabsContent/Terminal/types.ts | 3 ++- 4 files changed, 33 insertions(+), 3 deletions(-) diff --git a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts index fb783f42caa..e14cb8c7632 100644 --- a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts +++ b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts @@ -257,6 +257,7 @@ export const createTerminalRouter = () => { return observable< | { type: "data"; data: string } | { type: "exit"; exitCode: number; signal?: number } + | { type: "disconnect"; reason: string } >((emit) => { const onData = (data: string) => { emit.next({ type: "data", data }); @@ -267,13 +268,19 @@ export const createTerminalRouter = () => { emit.complete(); }; + const onDisconnect = (reason: string) => { + emit.next({ type: "disconnect", reason }); + }; + terminalManager.on(`data:${paneId}`, onData); terminalManager.on(`exit:${paneId}`, onExit); + terminalManager.on(`disconnect:${paneId}`, onDisconnect); // Cleanup on unsubscribe return () => { terminalManager.off(`data:${paneId}`, onData); terminalManager.off(`exit:${paneId}`, onExit); + terminalManager.off(`disconnect:${paneId}`, onDisconnect); }; }); }), diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 671fbc1e004..d80ef3a3d65 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -97,13 +97,28 @@ export class DaemonTerminalManager extends EventEmitter { }, ); - // Handle client disconnection + // Handle client disconnection - notify all active sessions this.client.on("disconnected", () => { console.warn("[DaemonTerminalManager] Disconnected from daemon"); + // Emit disconnect event for all active sessions so terminals can show error UI + for (const [paneId, session] of this.sessions.entries()) { + if (session.isAlive) { + this.emit( + `disconnect:${paneId}`, + "Connection to terminal daemon lost", + ); + } + } }); this.client.on("error", (error: Error) => { console.error("[DaemonTerminalManager] Client error:", error.message); + // Emit error event for all active sessions + for (const [paneId, session] of this.sessions.entries()) { + if (session.isAlive) { + this.emit(`disconnect:${paneId}`, error.message); + } + } }); } diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index ab80943735e..08a7a3ee500 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -247,6 +247,9 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { `\r\n\r\n[Process exited with code ${event.exitCode}]`, ); xtermRef.current.writeln("[Press any key to restart]"); + } else if (event.type === "disconnect") { + // Daemon connection lost - show error UI with retry option + setConnectionError(event.reason || "Connection to terminal daemon lost"); } }; @@ -325,11 +328,15 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (event.type === "data") { xterm.write(event.data); updateCwdRef.current(event.data); - } else { + } else if (event.type === "exit") { isExitedRef.current = true; setSubscriptionEnabled(false); xterm.writeln(`\r\n\r\n[Process exited with code ${event.exitCode}]`); xterm.writeln("[Press any key to restart]"); + } else if (event.type === "disconnect") { + setConnectionError( + event.reason || "Connection to terminal daemon lost", + ); } } }; diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts index 29e41dff6d5..1cc40404f89 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts @@ -5,4 +5,5 @@ export interface TerminalProps { export type TerminalStreamEvent = | { type: "data"; data: string } - | { type: "exit"; exitCode: number }; + | { type: "exit"; exitCode: number } + | { type: "disconnect"; reason: string }; From 9a9394ce3be2c24314db00b21c3832fd811ab18d Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 13:50:33 +0200 Subject: [PATCH 17/51] fix(desktop): gate TUI restoration until xterm renderer is ready When restoring TUI applications (claude, vim, etc.) after app restart, keyboard input would fail with xterm crash: 'Cannot read properties of undefined (reading dimensions)'. Root cause: xterm's internal viewport/render service wasn't fully initialized when rehydrateSequences (alternate screen mode escapes) were written immediately after open(). Fix: Gate restoration until xterm fires its first onRender event, then apply pending restoration data. This ensures the renderer is ready to handle escape sequences that modify terminal state. - Add didFirstRenderRef to track when xterm has rendered once - Add pendingInitialStateRef to store restoration data - Add maybeApplyInitialState() that runs only when both conditions met - Apply same pattern to all three restore paths: createOrAttach, restartTerminal, handleRetryConnection --- .../TabsContent/Terminal/Terminal.tsx | 251 +++++++++++------- 1 file changed, 152 insertions(+), 99 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 08a7a3ee500..938c954bdfc 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -1,6 +1,6 @@ import type { FitAddon } from "@xterm/addon-fit"; import type { SearchAddon } from "@xterm/addon-search"; -import type { Terminal as XTerm } from "@xterm/xterm"; +import type { IDisposable, Terminal as XTerm } from "@xterm/xterm"; import "@xterm/xterm/css/xterm.css"; import debounce from "lodash/debounce"; import { useCallback, useEffect, useRef, useState } from "react"; @@ -25,6 +25,21 @@ import { TerminalSearch } from "./TerminalSearch"; import type { TerminalProps, TerminalStreamEvent } from "./types"; import { shellEscapePaths } from "./utils"; +type CreateOrAttachResult = { + wasRecovered: boolean; + isNew: boolean; + scrollback: string; + snapshot?: { + snapshotAnsi: string; + rehydrateSequences: string; + cwd: string | null; + modes: Record; + cols: number; + rows: number; + scrollbackLines: number; + }; +}; + export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const paneId = tabId; const panes = useTabsStore((s) => s.panes); @@ -40,7 +55,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const isExitedRef = useRef(false); const pendingEventsRef = useRef([]); const commandBufferRef = useRef(""); - const [subscriptionEnabled, setSubscriptionEnabled] = useState(false); const [isSearchOpen, setIsSearchOpen] = useState(false); const [terminalCwd, setTerminalCwd] = useState(null); const [cwdConfirmed, setCwdConfirmed] = useState(false); @@ -57,6 +71,14 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const isFocused = pane?.tabId ? focusedPaneIds[pane.tabId] === paneId : false; + // Gate streaming until initial state restoration is applied to avoid interleaving output. + const isStreamReadyRef = useRef(false); + + // Gate restoration until xterm has rendered at least once (renderer/viewport ready). + const didFirstRenderRef = useRef(false); + const pendingInitialStateRef = useRef(null); + const renderDisposableRef = useRef(null); + // Refs avoid effect re-runs when these values change const isFocusedRef = useRef(isFocused); isFocusedRef.current = isFocused; @@ -178,12 +200,97 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { useTerminalCallbacksStore.getState().unregisterClearCallback, ); + const parentTabIdRef = useRef(parentTabId); + parentTabIdRef.current = parentTabId; + + const setTabAutoTitleRef = useRef(setTabAutoTitle); + setTabAutoTitleRef.current = setTabAutoTitle; + + const debouncedSetTabAutoTitleRef = useRef( + debounce((tabId: string, title: string) => { + setTabAutoTitleRef.current(tabId, title); + }, 100), + ); + + const flushPendingEvents = useCallback(() => { + const xterm = xtermRef.current; + if (!xterm) return; + if (pendingEventsRef.current.length === 0) return; + + const events = pendingEventsRef.current.splice( + 0, + pendingEventsRef.current.length, + ); + + for (const event of events) { + if (event.type === "data") { + xterm.write(event.data); + updateCwdRef.current(event.data); + } else if (event.type === "exit") { + isExitedRef.current = true; + isStreamReadyRef.current = false; + xterm.writeln(`\r\n\r\n[Process exited with code ${event.exitCode}]`); + xterm.writeln("[Press any key to restart]"); + } else if (event.type === "disconnect") { + setConnectionError( + event.reason || "Connection to terminal daemon lost", + ); + } + } + }, []); + + const maybeApplyInitialState = useCallback(() => { + if (!didFirstRenderRef.current) return; + const result = pendingInitialStateRef.current; + if (!result) return; + + const xterm = xtermRef.current; + const fitAddon = fitAddonRef.current; + if (!xterm || !fitAddon) return; + + // Clear before applying to prevent double-apply on concurrent triggers. + pendingInitialStateRef.current = null; + + try { + // Apply rehydration sequences FIRST to restore terminal modes + // (e.g., alternate screen, app cursor mode, bracketed paste) + // This must come before the scrollback content for correct TUI restoration + if (result.snapshot?.rehydrateSequences) { + xterm.write(result.snapshot.rehydrateSequences); + } + + // xterm.write() is asynchronous - escape sequences may not be fully + // processed when the terminal first renders, causing garbled display. + // Force a re-render after write completes to ensure correct display. + // (Symptom: restored terminals show corrupted text until resized) + // Using fitAddon.fit() which triggers a full re-layout and re-render. + xterm.write(result.scrollback, () => { + requestAnimationFrame(() => { + try { + fitAddon.fit(); + } catch (error) { + console.warn("[Terminal] fit() failed after restoration:", error); + } + }); + }); + updateCwdRef.current(result.scrollback); + } catch (error) { + console.error("[Terminal] Restoration failed:", error); + } + + // Enable streaming after initial state has been queued into xterm's write buffer. + isStreamReadyRef.current = true; + flushPendingEvents(); + }, [flushPendingEvents]); + const handleRetryConnection = useCallback(() => { setConnectionError(null); const xterm = xtermRef.current; - const fitAddon = fitAddonRef.current; if (!xterm) return; + isStreamReadyRef.current = false; + pendingInitialStateRef.current = null; + xterm.clear(); xterm.writeln("Retrying connection...\r\n"); @@ -198,41 +305,21 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { { onSuccess: (result) => { setConnectionError(null); - // Apply rehydration sequences first - if (result.snapshot?.rehydrateSequences) { - xterm.write(result.snapshot.rehydrateSequences); - } - // Force re-render after write completes - xterm.write(result.scrollback, () => { - requestAnimationFrame(() => { - fitAddon?.fit(); - }); - }); - setSubscriptionEnabled(true); + pendingInitialStateRef.current = result; + maybeApplyInitialState(); }, onError: (error) => { setConnectionError(error.message || "Connection failed"); - setSubscriptionEnabled(true); + isStreamReadyRef.current = true; + flushPendingEvents(); }, }, ); - }, [paneId, workspaceId]); - - const parentTabIdRef = useRef(parentTabId); - parentTabIdRef.current = parentTabId; - - const setTabAutoTitleRef = useRef(setTabAutoTitle); - setTabAutoTitleRef.current = setTabAutoTitle; - - const debouncedSetTabAutoTitleRef = useRef( - debounce((tabId: string, title: string) => { - setTabAutoTitleRef.current(tabId, title); - }, 100), - ); + }, [paneId, workspaceId, maybeApplyInitialState, flushPendingEvents]); const handleStreamData = (event: TerminalStreamEvent) => { // Queue events until terminal is ready to prevent data loss - if (!xtermRef.current || !subscriptionEnabled) { + if (!xtermRef.current || !isStreamReadyRef.current) { pendingEventsRef.current.push(event); return; } @@ -242,7 +329,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { updateCwdFromData(event.data); } else if (event.type === "exit") { isExitedRef.current = true; - setSubscriptionEnabled(false); + isStreamReadyRef.current = false; xtermRef.current.writeln( `\r\n\r\n[Process exited with code ${event.exitCode}]`, ); @@ -306,6 +393,9 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { xtermRef.current = xterm; fitAddonRef.current = fitAddon; isExitedRef.current = false; + isStreamReadyRef.current = false; + didFirstRenderRef.current = false; + pendingInitialStateRef.current = null; if (isFocusedRef.current) { xterm.focus(); @@ -318,66 +408,19 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { searchAddonRef.current = searchAddon; }); - const flushPendingEvents = () => { - if (pendingEventsRef.current.length === 0) return; - const events = pendingEventsRef.current.splice( - 0, - pendingEventsRef.current.length, - ); - for (const event of events) { - if (event.type === "data") { - xterm.write(event.data); - updateCwdRef.current(event.data); - } else if (event.type === "exit") { - isExitedRef.current = true; - setSubscriptionEnabled(false); - xterm.writeln(`\r\n\r\n[Process exited with code ${event.exitCode}]`); - xterm.writeln("[Press any key to restart]"); - } else if (event.type === "disconnect") { - setConnectionError( - event.reason || "Connection to terminal daemon lost", - ); - } - } - }; - - const applyInitialState = (result: { - wasRecovered: boolean; - isNew: boolean; - scrollback: string; - snapshot?: { - snapshotAnsi: string; - rehydrateSequences: string; - cwd: string | null; - modes: Record; - cols: number; - rows: number; - scrollbackLines: number; - }; - }) => { - // Apply rehydration sequences FIRST to restore terminal modes - // (e.g., alternate screen, app cursor mode, bracketed paste) - // This must come before the scrollback content for correct TUI restoration - if (result.snapshot?.rehydrateSequences) { - xterm.write(result.snapshot.rehydrateSequences); - } - - // xterm.write() is asynchronous - escape sequences may not be fully - // processed when the terminal first renders, causing garbled display. - // Force a re-render after write completes to ensure correct display. - // (Symptom: restored terminals show corrupted text until resized) - // Using fitAddon.fit() which triggers a full re-layout and re-render. - xterm.write(result.scrollback, () => { - requestAnimationFrame(() => { - fitAddon.fit(); - }); - }); - updateCwdRef.current(result.scrollback); - }; + // Wait for xterm to render once before applying restoration data. + // This prevents crashes when writing rehydrate escape sequences too early. + renderDisposableRef.current?.dispose(); + renderDisposableRef.current = xterm.onRender(() => { + renderDisposableRef.current?.dispose(); + renderDisposableRef.current = null; + didFirstRenderRef.current = true; + maybeApplyInitialState(); + }); const restartTerminal = () => { isExitedRef.current = false; - setSubscriptionEnabled(false); + isStreamReadyRef.current = false; xterm.clear(); createOrAttachRef.current( { @@ -389,14 +432,14 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }, { onSuccess: (result) => { - applyInitialState(result); - setSubscriptionEnabled(true); - flushPendingEvents(); + pendingInitialStateRef.current = result; + maybeApplyInitialState(); }, onError: (error) => { console.error("[Terminal] Failed to restart:", error); setConnectionError(error.message || "Failed to restart terminal"); - setSubscriptionEnabled(true); + isStreamReadyRef.current = true; + flushPendingEvents(); }, }, ); @@ -453,16 +496,16 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (initialCommands || initialCwd) { clearPaneInitialDataRef.current(paneId); } - // Always apply initial state (scrollback) first, then flush pending events - // This ensures we don't lose terminal history when reattaching - applyInitialState(result); - setSubscriptionEnabled(true); - flushPendingEvents(); + // Defer initial state restoration until xterm has rendered once. + // Streaming is enabled only after restoration is queued into xterm. + pendingInitialStateRef.current = result; + maybeApplyInitialState(); }, onError: (error) => { console.error("[Terminal] Failed to create/attach:", error); setConnectionError(error.message || "Failed to connect to terminal"); - setSubscriptionEnabled(true); + isStreamReadyRef.current = true; + flushPendingEvents(); }, }, ); @@ -532,12 +575,22 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { debouncedSetTabAutoTitleRef.current?.cancel?.(); // Detach instead of kill to keep PTY running for reattachment detachRef.current({ paneId }); - setSubscriptionEnabled(false); + isStreamReadyRef.current = false; + didFirstRenderRef.current = false; + pendingInitialStateRef.current = null; + renderDisposableRef.current?.dispose(); + renderDisposableRef.current = null; xterm.dispose(); xtermRef.current = null; searchAddonRef.current = null; }; - }, [paneId, workspaceId, workspaceCwd]); + }, [ + paneId, + workspaceId, + workspaceCwd, + flushPendingEvents, + maybeApplyInitialState, + ]); useEffect(() => { const xterm = xtermRef.current; From 150efceea717cfee441aad848c56c190f2cb7acc Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 13:55:44 +0200 Subject: [PATCH 18/51] fix(desktop): don't auto-title from keyboard input when in TUI apps When typing in TUI apps (codex, vim, etc.) that use alternate screen mode, the auto-title feature was incorrectly capturing keyboard input (e.g. 'hello') and setting it as the tab name. Fix: Check xterm.buffer.active.type before setting auto-title from keyboard input. TUI apps use 'alternate' screen buffer, so we skip keyboard-based auto-titling for them. TUI apps can still set their own title via escape sequences (handled by onTitleChange). --- .../ContentView/TabsContent/Terminal/Terminal.tsx | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 938c954bdfc..c0ccaa49165 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -459,9 +459,13 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }) => { const { domEvent } = event; if (domEvent.key === "Enter") { - const title = sanitizeForTitle(commandBufferRef.current); - if (title && parentTabIdRef.current) { - debouncedSetTabAutoTitleRef.current(parentTabIdRef.current, title); + // Don't auto-title from keyboard when in alternate screen (TUI apps like vim, codex) + // TUI apps set their own title via escape sequences handled by onTitleChange + if (xterm.buffer.active.type !== "alternate") { + const title = sanitizeForTitle(commandBufferRef.current); + if (title && parentTabIdRef.current) { + debouncedSetTabAutoTitleRef.current(parentTabIdRef.current, title); + } } commandBufferRef.current = ""; } else if (domEvent.key === "Backspace") { From 5aaf3c1aac2263eb0f4da82c13831724cfc46cbe Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 14:01:03 +0200 Subject: [PATCH 19/51] fix(desktop): enter alternate screen mode before writing TUI restoration content After restoration, xterm.js didn't know it was in alternate screen mode because rehydrateSequences intentionally excludes the 1049 escape sequence (sending it after content would clear the screen). Fix: Check snapshot.modes.alternateScreen and send the alternate screen escape sequence BEFORE writing any content. This makes xterm.js properly track that it's in alternate buffer mode, which is needed for: - Correct auto-title behavior (don't capture keyboard in TUI apps) - Proper xterm buffer state for applications expecting alternate screen --- .../ContentView/TabsContent/Terminal/Terminal.tsx | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index c0ccaa49165..bea1113765b 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -252,9 +252,16 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { pendingInitialStateRef.current = null; try { - // Apply rehydration sequences FIRST to restore terminal modes - // (e.g., alternate screen, app cursor mode, bracketed paste) - // This must come before the scrollback content for correct TUI restoration + // If session was in alternate screen mode, enter it BEFORE writing content. + // rehydrateSequences intentionally excludes alternate screen mode (1049) because + // sending it after content would clear the screen. We must send it first so xterm + // knows to use the alternate buffer, then write content into it. + if (result.snapshot?.modes.alternateScreen) { + xterm.write("\x1b[?1049h"); + } + + // Apply rehydration sequences to restore other terminal modes + // (app cursor mode, bracketed paste, mouse tracking, etc.) if (result.snapshot?.rehydrateSequences) { xterm.write(result.snapshot.rehydrateSequences); } From 05d4197be7e77c535fbf3096183c943fe45bcdaa Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 14:13:30 +0200 Subject: [PATCH 20/51] chore(desktop): remove noisy 'Already connected' log from ensureConnected fast path This log fired on every single daemon API call (write, resize, etc.) which spammed the console with hundreds of messages. The fast path doesn't need logging since it's the normal successful case. --- apps/desktop/src/main/lib/terminal-host/client.ts | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index fc05a7139db..763cf43bcb1 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -148,13 +148,12 @@ export class TerminalHostClient extends EventEmitter { * Spawns daemon if needed. */ async ensureConnected(): Promise { - // Already connected - fast path + // Already connected - fast path (no logging to avoid noise on every API call) if ( this.connectionState === ConnectionState.CONNECTED && this.socket && this.authenticated ) { - console.log("[TerminalHostClient] Already connected and authenticated"); return; } From 8d7b20622b6dcc9e5b5480bad31e519572f1d561 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 14:24:18 +0200 Subject: [PATCH 21/51] fix(desktop): track alternate screen mode ourselves instead of relying on xterm When the Terminal component remounts (HMR, recovery), a new xterm instance is created that doesn't know about escape sequences sent before it existed. Codex may have sent the alternate screen escape sequence, but the new xterm never saw it, so xterm.buffer.active.type incorrectly returns 'normal'. Fix: Track alternate screen mode ourselves via isAlternateScreenRef: - Set from snapshot.modes.alternateScreen on restore - Update when receiving escape sequences in stream data (1049h/l, 47h/l) - Use this ref instead of xterm.buffer.active.type for auto-title decisions - Reset on cleanup and terminal restart --- .../TabsContent/Terminal/Terminal.tsx | 29 ++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index bea1113765b..78f5541d671 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -79,6 +79,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const pendingInitialStateRef = useRef(null); const renderDisposableRef = useRef(null); + // Track alternate screen mode ourselves (xterm.buffer.active.type is unreliable after HMR/recovery) + // Updated from: snapshot.modes.alternateScreen on restore, escape sequences in stream + const isAlternateScreenRef = useRef(false); + // Refs avoid effect re-runs when these values change const isFocusedRef = useRef(isFocused); isFocusedRef.current = isFocused; @@ -252,6 +256,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { pendingInitialStateRef.current = null; try { + // Track alternate screen mode from snapshot for our own reference + // (xterm.buffer.active.type is unreliable after HMR/recovery) + isAlternateScreenRef.current = !!result.snapshot?.modes.alternateScreen; + // If session was in alternate screen mode, enter it BEFORE writing content. // rehydrateSequences intentionally excludes alternate screen mode (1049) because // sending it after content would clear the screen. We must send it first so xterm @@ -332,6 +340,20 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } if (event.type === "data") { + // Track alternate screen mode changes from escape sequences + // Check for both modern (1049) and legacy (47) alternate screen sequences + if ( + event.data.includes("\x1b[?1049h") || + event.data.includes("\x1b[?47h") + ) { + isAlternateScreenRef.current = true; + } + if ( + event.data.includes("\x1b[?1049l") || + event.data.includes("\x1b[?47l") + ) { + isAlternateScreenRef.current = false; + } xtermRef.current.write(event.data); updateCwdFromData(event.data); } else if (event.type === "exit") { @@ -428,6 +450,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const restartTerminal = () => { isExitedRef.current = false; isStreamReadyRef.current = false; + isAlternateScreenRef.current = false; // Reset for new shell xterm.clear(); createOrAttachRef.current( { @@ -468,7 +491,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (domEvent.key === "Enter") { // Don't auto-title from keyboard when in alternate screen (TUI apps like vim, codex) // TUI apps set their own title via escape sequences handled by onTitleChange - if (xterm.buffer.active.type !== "alternate") { + // Use our own tracking (isAlternateScreenRef) because xterm.buffer.active.type + // is unreliable after HMR or recovery - the new xterm instance doesn't know + // about escape sequences that were sent before it was created. + if (!isAlternateScreenRef.current) { const title = sanitizeForTitle(commandBufferRef.current); if (title && parentTabIdRef.current) { debouncedSetTabAutoTitleRef.current(parentTabIdRef.current, title); @@ -589,6 +615,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { isStreamReadyRef.current = false; didFirstRenderRef.current = false; pendingInitialStateRef.current = null; + isAlternateScreenRef.current = false; renderDisposableRef.current?.dispose(); renderDisposableRef.current = null; xterm.dispose(); From cadbeefd8ddc3bac16ad311598f9d1d92b15d647 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 14:29:03 +0200 Subject: [PATCH 22/51] fix(desktop): detect alternate screen mode from queued events and scrollback The previous fix tracked isAlternateScreenRef but only detected escape sequences in handleStreamData, which runs when isStreamReadyRef is true. Events arriving before stream was ready were queued to pendingEventsRef and flushed without parsing for escape sequences. This fix adds escape sequence detection to: 1. flushPendingEvents - for events queued during initial load 2. maybeApplyInitialState - parses scrollback for enter/exit sequences Fixes TUI apps (Codex, vim) incorrectly triggering auto-title from keyboard input. --- .../TabsContent/Terminal/Terminal.tsx | 29 +++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 78f5541d671..caf1c5535eb 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -228,6 +228,20 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { for (const event of events) { if (event.type === "data") { + // Track alternate screen mode from queued events too + // (escape sequences sent before stream was ready) + if ( + event.data.includes("\x1b[?1049h") || + event.data.includes("\x1b[?47h") + ) { + isAlternateScreenRef.current = true; + } + if ( + event.data.includes("\x1b[?1049l") || + event.data.includes("\x1b[?47l") + ) { + isAlternateScreenRef.current = false; + } xterm.write(event.data); updateCwdRef.current(event.data); } else if (event.type === "exit") { @@ -260,6 +274,21 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // (xterm.buffer.active.type is unreliable after HMR/recovery) isAlternateScreenRef.current = !!result.snapshot?.modes.alternateScreen; + // Also parse scrollback for escape sequences in case snapshot.modes is incomplete + // This handles cases where the daemon didn't track the mode but the sequences are in history + if (result.scrollback) { + const hasEnterAlt = + result.scrollback.includes("\x1b[?1049h") || + result.scrollback.includes("\x1b[?47h"); + const hasExitAlt = + result.scrollback.includes("\x1b[?1049l") || + result.scrollback.includes("\x1b[?47l"); + // If we see enter without exit, we're likely in alternate screen + if (hasEnterAlt && !hasExitAlt) { + isAlternateScreenRef.current = true; + } + } + // If session was in alternate screen mode, enter it BEFORE writing content. // rehydrateSequences intentionally excludes alternate screen mode (1049) because // sending it after content would clear the screen. We must send it first so xterm From 581bf513f7f75e78d3d78228d970b4cf4417e278 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 19:01:15 +0200 Subject: [PATCH 23/51] fix(desktop): force redraw after terminal restore --- .../ContentView/TabsContent/Terminal/Terminal.tsx | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index caf1c5535eb..e8ca1ef5773 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -312,6 +312,11 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { requestAnimationFrame(() => { try { fitAddon.fit(); + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. + // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. + if (xtermRef.current !== xterm) return; + resizeRef.current({ paneId, cols: xterm.cols, rows: xterm.rows }); + xterm.refresh(0, xterm.rows - 1); } catch (error) { console.warn("[Terminal] fit() failed after restoration:", error); } From 306981a99aad7ac18622b591897b6bbdb5d69e5d Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 19:21:36 +0200 Subject: [PATCH 24/51] fix(desktop): nudge resize to redraw TUIs after restore --- .../TabsContent/Terminal/Terminal.tsx | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index e8ca1ef5773..23c0a83fa02 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -312,11 +312,23 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { requestAnimationFrame(() => { try { fitAddon.fit(); + if (xtermRef.current !== xterm) return; + + // Some full-screen TUIs don't reliably repaint after reattach unless they + // receive an actual resize signal. Nudge rows by 1 and revert to force a redraw. + const cols = xterm.cols; + const rows = xterm.rows; + if (isAlternateScreenRef.current && rows > 2) { + const nudgeRows = rows - 1; + xterm.resize(cols, nudgeRows); + resizeRef.current({ paneId, cols, rows: nudgeRows }); + xterm.resize(cols, rows); + } + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. - if (xtermRef.current !== xterm) return; - resizeRef.current({ paneId, cols: xterm.cols, rows: xterm.rows }); - xterm.refresh(0, xterm.rows - 1); + resizeRef.current({ paneId, cols, rows }); + xterm.refresh(0, rows - 1); } catch (error) { console.warn("[Terminal] fit() failed after restoration:", error); } From a9f6f5afda1e3b8d3bb6d676b323ab5707f35a68 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 19:25:58 +0200 Subject: [PATCH 25/51] fix(desktop): force repaint on reattached terminals --- .../ContentView/TabsContent/Terminal/Terminal.tsx | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 23c0a83fa02..f5198cdc897 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -314,11 +314,11 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { fitAddon.fit(); if (xtermRef.current !== xterm) return; - // Some full-screen TUIs don't reliably repaint after reattach unless they - // receive an actual resize signal. Nudge rows by 1 and revert to force a redraw. + // Reattached sessions can sometimes render partially until the user resizes the + // pane. Nudge rows by 1 and revert to force a full repaint + TUI redraw. const cols = xterm.cols; const rows = xterm.rows; - if (isAlternateScreenRef.current && rows > 2) { + if (!result.isNew && rows > 2) { const nudgeRows = rows - 1; xterm.resize(cols, nudgeRows); resizeRef.current({ paneId, cols, rows: nudgeRows }); From db3b65c42c1ec755397f368555aba8332207ff66 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 20:22:56 +0200 Subject: [PATCH 26/51] fix(desktop): retry redraw after terminal restore --- .../TabsContent/Terminal/Terminal.tsx | 81 ++++++++++++------- 1 file changed, 53 insertions(+), 28 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index f5198cdc897..1da4da240e5 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -305,35 +305,60 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // xterm.write() is asynchronous - escape sequences may not be fully // processed when the terminal first renders, causing garbled display. - // Force a re-render after write completes to ensure correct display. - // (Symptom: restored terminals show corrupted text until resized) - // Using fitAddon.fit() which triggers a full re-layout and re-render. - xterm.write(result.scrollback, () => { - requestAnimationFrame(() => { - try { - fitAddon.fit(); - if (xtermRef.current !== xterm) return; - - // Reattached sessions can sometimes render partially until the user resizes the - // pane. Nudge rows by 1 and revert to force a full repaint + TUI redraw. - const cols = xterm.cols; - const rows = xterm.rows; - if (!result.isNew && rows > 2) { - const nudgeRows = rows - 1; - xterm.resize(cols, nudgeRows); - resizeRef.current({ paneId, cols, rows: nudgeRows }); - xterm.resize(cols, rows); - } - - // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. - // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. - resizeRef.current({ paneId, cols, rows }); - xterm.refresh(0, rows - 1); - } catch (error) { - console.warn("[Terminal] fit() failed after restoration:", error); - } + // Force a re-render after write completes to ensure correct display. + // (Symptom: restored terminals show corrupted text until resized) + // Using fitAddon.fit() which triggers a full re-layout and re-render. + xterm.write(result.scrollback, () => { + const redraw = () => { + requestAnimationFrame(() => { + try { + fitAddon.fit(); + if (xtermRef.current !== xterm) return; + + // Reattached sessions can sometimes render partially until the user resizes the + // pane. Nudge rows by 1 and revert to force a full repaint + TUI redraw. + const cols = xterm.cols; + const rows = xterm.rows; + if (cols <= 0 || rows <= 0) return; + + if (!result.isNew && rows > 2) { + const nudgeRows = rows - 1; + xterm.resize(cols, nudgeRows); + resizeRef.current({ paneId, cols, rows: nudgeRows }); + xterm.resize(cols, rows); + } + + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. + // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. + resizeRef.current({ paneId, cols, rows }); + xterm.refresh(0, rows - 1); + } catch (error) { + console.warn( + "[Terminal] redraw() failed after restoration:", + error, + ); + } + }); + }; + + const scheduleRedraw = (delayMs: number) => { + setTimeout(() => { + if (xtermRef.current !== xterm) return; + redraw(); + }, delayMs); + }; + + // Run multiple redraw passes to avoid timing issues with layout, fonts, and renderer init. + scheduleRedraw(0); + scheduleRedraw(50); + scheduleRedraw(250); + scheduleRedraw(1000); + + // If font metrics settle after restoration, run one more redraw. + void document.fonts?.ready.then(() => { + scheduleRedraw(0); + }); }); - }); updateCwdRef.current(result.scrollback); } catch (error) { console.error("[Terminal] Restoration failed:", error); From 76ac2a7b7b2b7f8d876b7f00299ca70b04b1d4b2 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 20:50:04 +0200 Subject: [PATCH 27/51] chore(desktop): fix terminal restore indentation --- .../TabsContent/Terminal/Terminal.tsx | 98 +++++++++---------- 1 file changed, 49 insertions(+), 49 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 1da4da240e5..21af87bc481 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -305,60 +305,60 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // xterm.write() is asynchronous - escape sequences may not be fully // processed when the terminal first renders, causing garbled display. - // Force a re-render after write completes to ensure correct display. - // (Symptom: restored terminals show corrupted text until resized) - // Using fitAddon.fit() which triggers a full re-layout and re-render. - xterm.write(result.scrollback, () => { - const redraw = () => { - requestAnimationFrame(() => { - try { - fitAddon.fit(); - if (xtermRef.current !== xterm) return; - - // Reattached sessions can sometimes render partially until the user resizes the - // pane. Nudge rows by 1 and revert to force a full repaint + TUI redraw. - const cols = xterm.cols; - const rows = xterm.rows; - if (cols <= 0 || rows <= 0) return; - - if (!result.isNew && rows > 2) { - const nudgeRows = rows - 1; - xterm.resize(cols, nudgeRows); - resizeRef.current({ paneId, cols, rows: nudgeRows }); - xterm.resize(cols, rows); - } - - // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. - // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. - resizeRef.current({ paneId, cols, rows }); - xterm.refresh(0, rows - 1); - } catch (error) { - console.warn( - "[Terminal] redraw() failed after restoration:", - error, - ); - } - }); - }; - - const scheduleRedraw = (delayMs: number) => { - setTimeout(() => { + // Force a re-render after write completes to ensure correct display. + // (Symptom: restored terminals show corrupted text until resized) + // Using fitAddon.fit() which triggers a full re-layout and re-render. + xterm.write(result.scrollback, () => { + const redraw = () => { + requestAnimationFrame(() => { + try { + fitAddon.fit(); if (xtermRef.current !== xterm) return; - redraw(); - }, delayMs); - }; - // Run multiple redraw passes to avoid timing issues with layout, fonts, and renderer init. - scheduleRedraw(0); - scheduleRedraw(50); - scheduleRedraw(250); - scheduleRedraw(1000); + // Reattached sessions can sometimes render partially until the user resizes the + // pane. Nudge rows by 1 and revert to force a full repaint + TUI redraw. + const cols = xterm.cols; + const rows = xterm.rows; + if (cols <= 0 || rows <= 0) return; + + if (!result.isNew && rows > 2) { + const nudgeRows = rows - 1; + xterm.resize(cols, nudgeRows); + resizeRef.current({ paneId, cols, rows: nudgeRows }); + xterm.resize(cols, rows); + } - // If font metrics settle after restoration, run one more redraw. - void document.fonts?.ready.then(() => { - scheduleRedraw(0); + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. + // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. + resizeRef.current({ paneId, cols, rows }); + xterm.refresh(0, rows - 1); + } catch (error) { + console.warn( + "[Terminal] redraw() failed after restoration:", + error, + ); + } }); + }; + + const scheduleRedraw = (delayMs: number) => { + setTimeout(() => { + if (xtermRef.current !== xterm) return; + redraw(); + }, delayMs); + }; + + // Run multiple redraw passes to avoid timing issues with layout, fonts, and renderer init. + scheduleRedraw(0); + scheduleRedraw(50); + scheduleRedraw(250); + scheduleRedraw(1000); + + // If font metrics settle after restoration, run one more redraw. + void document.fonts?.ready.then(() => { + scheduleRedraw(0); }); + }); updateCwdRef.current(result.scrollback); } catch (error) { console.error("[Terminal] Restoration failed:", error); From dcba01d6474f3ca12612185dc930f6bf064ed8e4 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 20:59:34 +0200 Subject: [PATCH 28/51] fix(desktop): force repaint on restored TUIs --- .../TabsContent/Terminal/Terminal.tsx | 58 +++++++++++++++++-- 1 file changed, 52 insertions(+), 6 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 21af87bc481..83d15723c1a 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -189,11 +189,13 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const createOrAttachRef = useRef(createOrAttachMutation.mutate); const writeRef = useRef(writeMutation.mutate); const resizeRef = useRef(resizeMutation.mutate); + const resizeAsyncRef = useRef(resizeMutation.mutateAsync); const detachRef = useRef(detachMutation.mutate); const clearScrollbackRef = useRef(clearScrollbackMutation.mutate); createOrAttachRef.current = createOrAttachMutation.mutate; writeRef.current = writeMutation.mutate; resizeRef.current = resizeMutation.mutate; + resizeAsyncRef.current = resizeMutation.mutateAsync; detachRef.current = detachMutation.mutate; clearScrollbackRef.current = clearScrollbackMutation.mutate; @@ -309,6 +311,8 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // (Symptom: restored terminals show corrupted text until resized) // Using fitAddon.fit() which triggers a full re-layout and re-render. xterm.write(result.scrollback, () => { + let didForceRepaint = false; + const redraw = () => { requestAnimationFrame(() => { try { @@ -316,16 +320,58 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (xtermRef.current !== xterm) return; // Reattached sessions can sometimes render partially until the user resizes the - // pane. Nudge rows by 1 and revert to force a full repaint + TUI redraw. + // pane. Nudge dimensions to force a full repaint + TUI redraw. const cols = xterm.cols; const rows = xterm.rows; if (cols <= 0 || rows <= 0) return; - if (!result.isNew && rows > 2) { - const nudgeRows = rows - 1; - xterm.resize(cols, nudgeRows); - resizeRef.current({ paneId, cols, rows: nudgeRows }); - xterm.resize(cols, rows); + if (!result.isNew && !didForceRepaint) { + didForceRepaint = true; + + void (async () => { + try { + if (xtermRef.current !== xterm) return; + + // TUIs run in alt-screen and don't care about scrollback reflow. + // Prefer nudging `cols` to force a full line reflow + repaint. + if (isAlternateScreenRef.current && cols > 2) { + const nudgeCols = cols - 1; + xterm.resize(nudgeCols, rows); + xterm.resize(cols, rows); + await resizeAsyncRef.current({ + paneId, + cols: nudgeCols, + rows, + }); + await new Promise((resolve) => { + setTimeout(resolve, 16); + }); + if (xtermRef.current !== xterm) return; + await resizeAsyncRef.current({ paneId, cols, rows }); + return; + } + + // For non-alt-screen, only nudge the PTY (avoid changing xterm scrollback). + if (rows > 2) { + const nudgeRows = rows - 1; + await resizeAsyncRef.current({ + paneId, + cols, + rows: nudgeRows, + }); + await new Promise((resolve) => { + setTimeout(resolve, 16); + }); + if (xtermRef.current !== xterm) return; + await resizeAsyncRef.current({ paneId, cols, rows }); + } + } catch (error) { + console.warn( + "[Terminal] force repaint failed after restoration:", + error, + ); + } + })(); } // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. From 5b37de16918079e4db7f3f00fbbe996dd1edb89b Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Tue, 30 Dec 2025 21:31:55 +0200 Subject: [PATCH 29/51] fix(desktop): smooth terminal restore repaint --- .../TabsContent/Terminal/Terminal.tsx | 91 +++++++------------ 1 file changed, 35 insertions(+), 56 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 83d15723c1a..7df234c989d 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -78,6 +78,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const didFirstRenderRef = useRef(false); const pendingInitialStateRef = useRef(null); const renderDisposableRef = useRef(null); + const restoreSequenceRef = useRef(0); // Track alternate screen mode ourselves (xterm.buffer.active.type is unreliable after HMR/recovery) // Updated from: snapshot.modes.alternateScreen on restore, escape sequences in stream @@ -270,6 +271,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Clear before applying to prevent double-apply on concurrent triggers. pendingInitialStateRef.current = null; + const restoreSequence = ++restoreSequenceRef.current; try { // Track alternate screen mode from snapshot for our own reference @@ -316,55 +318,43 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const redraw = () => { requestAnimationFrame(() => { try { + if (restoreSequenceRef.current !== restoreSequence) return; + if (xtermRef.current !== xterm) return; + fitAddon.fit(); if (xtermRef.current !== xterm) return; - // Reattached sessions can sometimes render partially until the user resizes the - // pane. Nudge dimensions to force a full repaint + TUI redraw. + // Reattached sessions can sometimes render partially until the user resizes the pane. + // Force a repaint and (for restored TUIs) one SIGWINCH cycle to trigger a redraw. const cols = xterm.cols; const rows = xterm.rows; if (cols <= 0 || rows <= 0) return; - if (!result.isNew && !didForceRepaint) { + const shouldForceRepaint = + !result.isNew && isAlternateScreenRef.current && rows > 2; + + if (shouldForceRepaint && !didForceRepaint) { didForceRepaint = true; + const nudgeRows = rows - 1; + // Order matters: send the nudge, yield a frame, then restore. This ensures + // the PTY actually delivers SIGWINCH and the TUI repaints into the buffer. void (async () => { try { + await resizeAsyncRef.current({ + paneId, + cols, + rows: nudgeRows, + }); + await new Promise((resolve) => { + setTimeout(resolve, 16); + }); + if (restoreSequenceRef.current !== restoreSequence) return; if (xtermRef.current !== xterm) return; - - // TUIs run in alt-screen and don't care about scrollback reflow. - // Prefer nudging `cols` to force a full line reflow + repaint. - if (isAlternateScreenRef.current && cols > 2) { - const nudgeCols = cols - 1; - xterm.resize(nudgeCols, rows); - xterm.resize(cols, rows); - await resizeAsyncRef.current({ - paneId, - cols: nudgeCols, - rows, - }); - await new Promise((resolve) => { - setTimeout(resolve, 16); - }); - if (xtermRef.current !== xterm) return; - await resizeAsyncRef.current({ paneId, cols, rows }); - return; - } - - // For non-alt-screen, only nudge the PTY (avoid changing xterm scrollback). - if (rows > 2) { - const nudgeRows = rows - 1; - await resizeAsyncRef.current({ - paneId, - cols, - rows: nudgeRows, - }); - await new Promise((resolve) => { - setTimeout(resolve, 16); - }); - if (xtermRef.current !== xterm) return; - await resizeAsyncRef.current({ paneId, cols, rows }); - } + await resizeAsyncRef.current({ paneId, cols, rows }); + if (restoreSequenceRef.current !== restoreSequence) return; + if (xtermRef.current !== xterm) return; + xterm.refresh(0, rows - 1); } catch (error) { console.warn( "[Terminal] force repaint failed after restoration:", @@ -372,11 +362,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { ); } })(); + } else { + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. + resizeRef.current({ paneId, cols, rows }); } - - // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. - // This also forces full-screen TUIs (opencode, vim, etc.) to redraw after reattach. - resizeRef.current({ paneId, cols, rows }); xterm.refresh(0, rows - 1); } catch (error) { console.warn( @@ -387,22 +376,12 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }); }; - const scheduleRedraw = (delayMs: number) => { - setTimeout(() => { - if (xtermRef.current !== xterm) return; - redraw(); - }, delayMs); - }; - - // Run multiple redraw passes to avoid timing issues with layout, fonts, and renderer init. - scheduleRedraw(0); - scheduleRedraw(50); - scheduleRedraw(250); - scheduleRedraw(1000); - - // If font metrics settle after restoration, run one more redraw. + // Redraw once immediately, and once again after fonts settle. + redraw(); void document.fonts?.ready.then(() => { - scheduleRedraw(0); + if (restoreSequenceRef.current !== restoreSequence) return; + if (xtermRef.current !== xterm) return; + redraw(); }); }); updateCwdRef.current(result.scrollback); From 22072e51c7d8a1d7f094d1bea0c0234a50b2d565 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 09:23:25 +0200 Subject: [PATCH 30/51] fix(desktop): fix WebGL corruption on terminal restore - Clear xterm-webgl texture atlas after rehydration to force a clean repaint - Add a first-render fallback so restored sessions can't get stuck not-ready - Surface terminal stream error events --- .../src/main/lib/terminal/daemon-manager.ts | 9 ++ .../TabsContent/Terminal/Terminal.tsx | 105 +++++++++++------- .../TabsContent/Terminal/helpers.ts | 52 ++++++--- .../ContentView/TabsContent/Terminal/types.ts | 3 +- 4 files changed, 111 insertions(+), 58 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index d80ef3a3d65..43fd0df4a5f 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -97,6 +97,15 @@ export class DaemonTerminalManager extends EventEmitter { }, ); + // Forward terminal-specific error events (e.g., write queue full) + this.client.on( + "terminalError", + (sessionId: string, error: string, code?: string) => { + const paneId = sessionId; + this.emit(`error:${paneId}`, { error, code }); + }, + ); + // Handle client disconnection - notify all active sessions this.client.on("disconnected", () => { console.warn("[DaemonTerminalManager] Disconnected from daemon"); diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 7df234c989d..a14bc163fd3 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -19,12 +19,15 @@ import { setupKeyboardHandler, setupPasteHandler, setupResizeHandlers, + type TerminalRenderer, } from "./helpers"; import { parseCwd } from "./parseCwd"; import { TerminalSearch } from "./TerminalSearch"; import type { TerminalProps, TerminalStreamEvent } from "./types"; import { shellEscapePaths } from "./utils"; +const FIRST_RENDER_RESTORE_FALLBACK_MS = 250; + type CreateOrAttachResult = { wasRecovered: boolean; isNew: boolean; @@ -52,6 +55,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const xtermRef = useRef(null); const fitAddonRef = useRef(null); const searchAddonRef = useRef(null); + const rendererRef = useRef(null); const isExitedRef = useRef(false); const pendingEventsRef = useRef([]); const commandBufferRef = useRef(""); @@ -190,13 +194,11 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const createOrAttachRef = useRef(createOrAttachMutation.mutate); const writeRef = useRef(writeMutation.mutate); const resizeRef = useRef(resizeMutation.mutate); - const resizeAsyncRef = useRef(resizeMutation.mutateAsync); const detachRef = useRef(detachMutation.mutate); const clearScrollbackRef = useRef(clearScrollbackMutation.mutate); createOrAttachRef.current = createOrAttachMutation.mutate; writeRef.current = writeMutation.mutate; resizeRef.current = resizeMutation.mutate; - resizeAsyncRef.current = resizeMutation.mutateAsync; detachRef.current = detachMutation.mutate; clearScrollbackRef.current = clearScrollbackMutation.mutate; @@ -256,6 +258,18 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { setConnectionError( event.reason || "Connection to terminal daemon lost", ); + } else if (event.type === "error") { + const message = event.code + ? `${event.code}: ${event.error}` + : event.error; + console.warn("[Terminal] stream error:", message); + + // Don't block interaction for non-fatal issues like a paste drop. + if (event.code === "WRITE_QUEUE_FULL") { + xterm.writeln(`\r\n[Terminal] ${message}`); + } else { + setConnectionError(message); + } } } }, []); @@ -311,10 +325,8 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // processed when the terminal first renders, causing garbled display. // Force a re-render after write completes to ensure correct display. // (Symptom: restored terminals show corrupted text until resized) - // Using fitAddon.fit() which triggers a full re-layout and re-render. + // Use fitAddon.fit() and (when using WebGL) clear the glyph atlas to force a full repaint. xterm.write(result.scrollback, () => { - let didForceRepaint = false; - const redraw = () => { requestAnimationFrame(() => { try { @@ -325,46 +337,23 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (xtermRef.current !== xterm) return; // Reattached sessions can sometimes render partially until the user resizes the pane. - // Force a repaint and (for restored TUIs) one SIGWINCH cycle to trigger a redraw. + // WebGL off fully fixes this, which strongly suggests a WebGL texture-atlas repaint bug. + // Clearing the atlas forces xterm-webgl to rebuild glyphs and repaint without a resize nudge. const cols = xterm.cols; const rows = xterm.rows; if (cols <= 0 || rows <= 0) return; - const shouldForceRepaint = - !result.isNew && isAlternateScreenRef.current && rows > 2; - - if (shouldForceRepaint && !didForceRepaint) { - didForceRepaint = true; - const nudgeRows = rows - 1; - - // Order matters: send the nudge, yield a frame, then restore. This ensures - // the PTY actually delivers SIGWINCH and the TUI repaints into the buffer. - void (async () => { - try { - await resizeAsyncRef.current({ - paneId, - cols, - rows: nudgeRows, - }); - await new Promise((resolve) => { - setTimeout(resolve, 16); - }); - if (restoreSequenceRef.current !== restoreSequence) return; - if (xtermRef.current !== xterm) return; - await resizeAsyncRef.current({ paneId, cols, rows }); - if (restoreSequenceRef.current !== restoreSequence) return; - if (xtermRef.current !== xterm) return; - xterm.refresh(0, rows - 1); - } catch (error) { - console.warn( - "[Terminal] force repaint failed after restoration:", - error, - ); - } - })(); - } else { - // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. - resizeRef.current({ paneId, cols, rows }); + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. + resizeRef.current({ paneId, cols, rows }); + + if (!result.isNew) { + const renderer = rendererRef.current; + if (renderer?.kind === "webgl") { + // Clear twice: once immediately, and once after fonts settle. + // This reduces restore artifacts (especially for TUIs like opencode) + // and prevents stale glyphs when fonts swap in. + renderer.clearTextureAtlas?.(); + } } xterm.refresh(0, rows - 1); } catch (error) { @@ -392,7 +381,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Enable streaming after initial state has been queued into xterm's write buffer. isStreamReadyRef.current = true; flushPendingEvents(); - }, [flushPendingEvents]); + }, [flushPendingEvents, paneId]); const handleRetryConnection = useCallback(() => { setConnectionError(null); @@ -462,6 +451,17 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } else if (event.type === "disconnect") { // Daemon connection lost - show error UI with retry option setConnectionError(event.reason || "Connection to terminal daemon lost"); + } else if (event.type === "error") { + const message = event.code + ? `${event.code}: ${event.error}` + : event.error; + console.warn("[Terminal] stream error:", message); + + if (event.code === "WRITE_QUEUE_FULL") { + xtermRef.current.writeln(`\r\n[Terminal] ${message}`); + } else { + setConnectionError(message); + } } }; @@ -508,6 +508,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const { xterm, fitAddon, + renderer, cleanup: cleanupQuerySuppression, } = createTerminalInstance(container, { cwd: workspaceCwd, @@ -517,6 +518,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }); xtermRef.current = xterm; fitAddonRef.current = fitAddon; + rendererRef.current = renderer; isExitedRef.current = false; isStreamReadyRef.current = false; didFirstRenderRef.current = false; @@ -536,13 +538,28 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Wait for xterm to render once before applying restoration data. // This prevents crashes when writing rehydrate escape sequences too early. renderDisposableRef.current?.dispose(); + let firstRenderFallback: ReturnType | null = null; + renderDisposableRef.current = xterm.onRender(() => { + if (firstRenderFallback) { + clearTimeout(firstRenderFallback); + firstRenderFallback = null; + } renderDisposableRef.current?.dispose(); renderDisposableRef.current = null; didFirstRenderRef.current = true; maybeApplyInitialState(); }); + // Failure-proofing: if the renderer never emits an initial render (e.g. WebGL hiccup, + // offscreen mount), don't leave the session stuck in "not ready" forever. + firstRenderFallback = setTimeout(() => { + if (isUnmounted) return; + if (didFirstRenderRef.current) return; + didFirstRenderRef.current = true; + maybeApplyInitialState(); + }, FIRST_RENDER_RESTORE_FALLBACK_MS); + const restartTerminal = () => { isExitedRef.current = false; isStreamReadyRef.current = false; @@ -695,6 +712,9 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { return () => { isUnmounted = true; + if (firstRenderFallback) { + clearTimeout(firstRenderFallback); + } inputDisposable.dispose(); keyDisposable.dispose(); titleDisposable.dispose(); @@ -717,6 +737,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { xterm.dispose(); xtermRef.current = null; searchAddonRef.current = null; + rendererRef.current = null; }; }, [ paneId, diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts index 89473cdf9d6..c726f7f8cc3 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts @@ -60,35 +60,55 @@ export function getDefaultTerminalBg(): string { * Load GPU-accelerated renderer with automatic fallback. * Tries WebGL first, falls back to Canvas if WebGL fails. */ -function loadRenderer(xterm: XTerm): { dispose: () => void } { +export type TerminalRenderer = { + kind: "webgl" | "canvas" | "dom"; + dispose: () => void; + clearTextureAtlas?: () => void; +}; + +function loadRenderer(xterm: XTerm): TerminalRenderer { let renderer: WebglAddon | CanvasAddon | null = null; + let webglAddon: WebglAddon | null = null; + let kind: TerminalRenderer["kind"] = "dom"; + + const tryLoadCanvas = () => { + try { + renderer = new CanvasAddon(); + xterm.loadAddon(renderer); + kind = "canvas"; + } catch { + // Canvas fallback failed, use default renderer + } + }; try { - const webglAddon = new WebglAddon(); + webglAddon = new WebglAddon(); webglAddon.onContextLoss(() => { - webglAddon.dispose(); - try { - renderer = new CanvasAddon(); - xterm.loadAddon(renderer); - } catch { - // Canvas fallback failed, use default renderer - } + webglAddon?.dispose(); + webglAddon = null; + tryLoadCanvas(); }); xterm.loadAddon(webglAddon); renderer = webglAddon; + kind = "webgl"; } catch { - try { - renderer = new CanvasAddon(); - xterm.loadAddon(renderer); - } catch { - // Both renderers failed, use default - } + tryLoadCanvas(); } return { + kind, dispose: () => renderer?.dispose(), + clearTextureAtlas: webglAddon + ? () => { + try { + webglAddon?.clearTextureAtlas(); + } catch (error) { + console.warn("[Terminal] WebGL clearTextureAtlas() failed:", error); + } + } + : undefined, }; } @@ -104,6 +124,7 @@ export function createTerminalInstance( ): { xterm: XTerm; fitAddon: FitAddon; + renderer: TerminalRenderer; cleanup: () => void; } { const { cwd, initialTheme, onFileLinkClick } = options; @@ -178,6 +199,7 @@ export function createTerminalInstance( return { xterm, fitAddon, + renderer, cleanup: () => { cleanupQuerySuppression(); renderer.dispose(); diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts index 1cc40404f89..f74da3d734b 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/types.ts @@ -6,4 +6,5 @@ export interface TerminalProps { export type TerminalStreamEvent = | { type: "data"; data: string } | { type: "exit"; exitCode: number } - | { type: "disconnect"; reason: string }; + | { type: "disconnect"; reason: string } + | { type: "error"; error: string; code?: string }; From 32892da18e7692c72f58340f68ebba808c26be62 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 09:37:44 +0200 Subject: [PATCH 31/51] fix(desktop): make large pastes reliable - Run PTYs in per-session subprocesses and frame IO as binary - Time-slice headless emulator output processing to keep daemon responsive - Handle PTY input backpressure (EAGAIN/EWOULDBLOCK) without dropping chunks - Improve renderer paste handling (bracketed paste + chunking) and surface errors --- LARGE_PASTE_HANG_ANALYSIS.md | 60 ++ apps/desktop/electron.vite.config.ts | 1 + .../src/lib/trpc/routers/terminal/terminal.ts | 22 +- .../src/main/lib/terminal-host/client.ts | 114 +++- .../lib/terminal-host/headless-emulator.ts | 23 +- .../src/main/lib/terminal-host/types.ts | 15 +- .../src/main/lib/terminal/daemon-manager.ts | 29 +- apps/desktop/src/main/lib/terminal/manager.ts | 11 +- .../src/main/lib/terminal/port-manager.ts | 41 +- .../src/main/lib/terminal/pty-write-queue.ts | 150 +++++ apps/desktop/src/main/lib/terminal/session.ts | 6 +- apps/desktop/src/main/lib/terminal/types.ts | 3 + apps/desktop/src/main/terminal-host/index.ts | 37 +- .../main/terminal-host/pty-subprocess-ipc.ts | 128 +++++ .../src/main/terminal-host/pty-subprocess.ts | 415 ++++++++++++++ .../desktop/src/main/terminal-host/session.ts | 516 +++++++++++++++--- .../TabsContent/Terminal/Terminal.tsx | 152 ++++-- .../TabsContent/Terminal/helpers.ts | 124 ++++- 18 files changed, 1700 insertions(+), 147 deletions(-) create mode 100644 LARGE_PASTE_HANG_ANALYSIS.md create mode 100644 apps/desktop/src/main/lib/terminal/pty-write-queue.ts create mode 100644 apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts create mode 100644 apps/desktop/src/main/terminal-host/pty-subprocess.ts diff --git a/LARGE_PASTE_HANG_ANALYSIS.md b/LARGE_PASTE_HANG_ANALYSIS.md new file mode 100644 index 00000000000..3006a8f353d --- /dev/null +++ b/LARGE_PASTE_HANG_ANALYSIS.md @@ -0,0 +1,60 @@ +# Large Paste into `vi` — Postmortem & Fix + +## Problem +Pasting large blocks of text (e.g. 3k+ lines) into `vi` inside Superset Desktop’s persistent terminal could: +- hang the terminal daemon / freeze all terminals, or +- partially paste and then silently stop (missing chunks). + +This was most visible on macOS (small kernel PTY buffer + very high output volume during `vi` repaints). + +## What Was Actually Happening +There were two distinct failure modes. + +### 1) CPU saturation on output (daemon side) +Large pastes cause `vi` to repaint aggressively, producing huge volumes of escape-sequence-heavy output. If the daemon tries to parse and apply that output to the headless xterm emulator in large, unbounded chunks, it can monopolize the event loop and trigger request timeouts / “frozen terminals”. + +### 2) Backpressure on input (PTY write side) +PTY writes must respect backpressure. When writing directly to a PTY file descriptor in non-blocking mode, the kernel can return: +- `EAGAIN` / `EWOULDBLOCK` (normal: PTY buffer full) + +If `EAGAIN` is treated as fatal (or if the queue is cleared on error), paste chunks get dropped. + +## Final Fix (Working) +The solution is end-to-end flow control + isolation. + +### Process isolation (per terminal) +Each PTY runs in its own subprocess (`apps/desktop/src/main/terminal-host/pty-subprocess.ts`). One terminal hitting backpressure can’t freeze the daemon or other terminals. + +### Binary framing (no JSON/NDJSON on hot paths) +Subprocess ↔ daemon communication uses a small length-prefixed binary framing protocol (`apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts`) to avoid JSON stringify/parse overhead on escape-heavy output. + +### Output batching + stdout backpressure +Subprocess batches PTY output (32ms cadence, 128KB max) and pauses PTY reads when `process.stdout` is backpressured. + +### Input backpressure (retry, don’t drop) +Subprocess writes to the PTY fd via async `fs.write()` (when fd is available) and treats `EAGAIN`/`EWOULDBLOCK` as expected backpressure: +- keeps the queued buffers +- retries with exponential backoff (2ms → 50ms) +- pauses upstream `stdin` when backlog exceeds a high watermark and resumes once drained + +### Daemon responsiveness (time-sliced emulator) +The daemon applies PTY output to the headless emulator in time-budgeted slices to avoid long single-tick stalls during heavy output bursts. + +### Renderer paste behavior +Renderer wraps clipboard pastes with bracketed paste sequences and chunks large payloads to reduce burstiness. + +## Debugging / Observability +Set these env vars and restart the app: +- `SUPERSET_PTY_SUBPROCESS_DEBUG=1` — subprocess batching + PTY input backpressure logs +- `SUPERSET_TERMINAL_EMULATOR_DEBUG=1` — daemon emulator budget/overrun logs + +Helpful process inspection: +```bash +ps aux | rg "terminal-host|pty-subprocess" -n +``` + +## Repro / Verification +1. Start the desktop app (`apps/desktop`). +2. Open a terminal, run `vi tmp.txt` and enter insert mode (`i`). +3. Paste ~3000+ lines. +4. Verify `vi` receives all lines (save to disk and check line count) and other terminals remain responsive. diff --git a/apps/desktop/electron.vite.config.ts b/apps/desktop/electron.vite.config.ts index 64a0e3801e7..62a3727c2b2 100644 --- a/apps/desktop/electron.vite.config.ts +++ b/apps/desktop/electron.vite.config.ts @@ -109,6 +109,7 @@ export default defineConfig({ input: { index: resolve("src/main/index.ts"), "terminal-host": resolve("src/main/terminal-host/index.ts"), + "pty-subprocess": resolve("src/main/terminal-host/pty-subprocess.ts"), }, output: { dir: resolve(devPath, "main"), diff --git a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts index e14cb8c7632..3baf541f31d 100644 --- a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts +++ b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts @@ -103,7 +103,16 @@ export const createTerminalRouter = () => { }), ) .mutation(async ({ input }) => { - terminalManager.write(input); + try { + terminalManager.write(input); + } catch (error) { + const message = + error instanceof Error ? error.message : "Write failed"; + terminalManager.emit(`error:${input.paneId}`, { + error: message, + code: "WRITE_FAILED", + }); + } }), resize: publicProcedure @@ -258,6 +267,7 @@ export const createTerminalRouter = () => { | { type: "data"; data: string } | { type: "exit"; exitCode: number; signal?: number } | { type: "disconnect"; reason: string } + | { type: "error"; error: string; code?: string } >((emit) => { const onData = (data: string) => { emit.next({ type: "data", data }); @@ -272,15 +282,25 @@ export const createTerminalRouter = () => { emit.next({ type: "disconnect", reason }); }; + const onError = (payload: { error: string; code?: string }) => { + emit.next({ + type: "error", + error: payload.error, + code: payload.code, + }); + }; + terminalManager.on(`data:${paneId}`, onData); terminalManager.on(`exit:${paneId}`, onExit); terminalManager.on(`disconnect:${paneId}`, onDisconnect); + terminalManager.on(`error:${paneId}`, onError); // Cleanup on unsubscribe return () => { terminalManager.off(`data:${paneId}`, onData); terminalManager.off(`exit:${paneId}`, onExit); terminalManager.off(`disconnect:${paneId}`, onDisconnect); + terminalManager.off(`error:${paneId}`, onError); }; }); }), diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 763cf43bcb1..25e9491d9f1 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -40,6 +40,7 @@ import { type ResizeRequest, type ShutdownRequest, type TerminalDataEvent, + type TerminalErrorEvent, type TerminalExitEvent, type WriteRequest, } from "./types"; @@ -78,16 +79,22 @@ const SPAWN_LOCK_TIMEOUT_MS = 10000; // Max time to hold spawn lock // ============================================================================= class NdjsonParser { - private buffer = ""; + // Use array buffering to avoid O(n²) string concatenation on high-volume streams + private chunks: string[] = []; + private remainder = ""; parse(chunk: string): Array { - this.buffer += chunk; const messages: Array = []; - let newlineIndex = this.buffer.indexOf("\n"); + // Prepend any remainder from previous parse + const data = this.remainder + chunk; + this.remainder = ""; + + let startIndex = 0; + let newlineIndex = data.indexOf("\n"); + while (newlineIndex !== -1) { - const line = this.buffer.slice(0, newlineIndex); - this.buffer = this.buffer.slice(newlineIndex + 1); + const line = data.slice(startIndex, newlineIndex); if (line.trim()) { try { @@ -97,7 +104,13 @@ class NdjsonParser { } } - newlineIndex = this.buffer.indexOf("\n"); + startIndex = newlineIndex + 1; + newlineIndex = data.indexOf("\n", startIndex); + } + + // Save any remaining data after the last newline + if (startIndex < data.length) { + this.remainder = data.slice(startIndex); } return messages; @@ -121,6 +134,8 @@ interface PendingRequest { export interface TerminalHostClientEvents { data: (sessionId: string, data: string) => void; exit: (sessionId: string, exitCode: number, signal?: number) => void; + /** Terminal-specific error (e.g., write queue full - paste dropped) */ + terminalError: (sessionId: string, error: string, code?: string) => void; connected: () => void; disconnected: () => void; error: (error: Error) => void; @@ -138,6 +153,9 @@ export class TerminalHostClient extends EventEmitter { private authenticated = false; private connectionState = ConnectionState.DISCONNECTED; private disposed = false; + private notifyQueue: string[] = []; + private notifyQueueBytes = 0; + private notifyDrainArmed = false; // =========================================================================== // Connection Management @@ -282,6 +300,10 @@ export class TerminalHostClient extends EventEmitter { } }); + this.socket.on("drain", () => { + this.flushNotifyQueue(); + }); + this.socket.on("close", () => { this.handleDisconnect(); }); @@ -313,7 +335,10 @@ export class TerminalHostClient extends EventEmitter { } else if (message.type === "event") { // Event from daemon const event = message as IpcEvent; - const payload = event.payload as TerminalDataEvent | TerminalExitEvent; + const payload = event.payload as + | TerminalDataEvent + | TerminalExitEvent + | TerminalErrorEvent; if (payload.type === "data") { this.emit("data", event.sessionId, (payload as TerminalDataEvent).data); @@ -325,6 +350,16 @@ export class TerminalHostClient extends EventEmitter { exitPayload.exitCode, exitPayload.signal, ); + } else if (payload.type === "error") { + const errorPayload = payload as TerminalErrorEvent; + // Emit terminal-specific error so callers can handle it + // This is critical for "Write queue full" - paste was silently dropped before! + this.emit( + "terminalError", + event.sessionId, + errorPayload.error, + errorPayload.code, + ); } } } @@ -336,6 +371,9 @@ export class TerminalHostClient extends EventEmitter { this.socket = null; this.authenticated = false; this.connectionState = ConnectionState.DISCONNECTED; + this.notifyQueue = []; + this.notifyQueueBytes = 0; + this.notifyDrainArmed = false; // Reject all pending requests for (const [id, pending] of this.pendingRequests.entries()) { @@ -599,6 +637,53 @@ export class TerminalHostClient extends EventEmitter { }); } + /** + * Send a notification (no pending request / no timeout). + * + * Used for high-frequency messages like terminal input, where request/response + * overhead can cause timeouts under load and drop data. The daemon may still + * send a response for compatibility, but this client will ignore it. + */ + private sendNotification(type: string, payload: unknown): void { + if (!this.socket) return; + + const id = `notify_${++this.requestCounter}`; + const message = `${JSON.stringify({ id, type, payload })}\n`; + + // If we're already backpressured, just queue. + if (this.notifyDrainArmed || this.notifyQueue.length > 0) { + this.notifyQueue.push(message); + this.notifyQueueBytes += Buffer.byteLength(message, "utf8"); + return; + } + + const canWrite = this.socket.write(message); + if (!canWrite) { + // Message is queued internally by the socket; arm drain to flush any + // subsequent notifications we enqueue. + this.notifyDrainArmed = true; + } + } + + private flushNotifyQueue(): void { + if (!this.socket) return; + if (!this.notifyDrainArmed && this.notifyQueue.length === 0) return; + + this.notifyDrainArmed = false; + + while (this.notifyQueue.length > 0) { + const message = this.notifyQueue.shift(); + if (!message) break; + this.notifyQueueBytes -= Buffer.byteLength(message, "utf8"); + + const canWrite = this.socket.write(message); + if (!canWrite) { + this.notifyDrainArmed = true; + return; + } + } + } + // =========================================================================== // Public API // =========================================================================== @@ -624,6 +709,21 @@ export class TerminalHostClient extends EventEmitter { return (await this.sendRequest("write", request)) as EmptyResponse; } + /** + * Write data without waiting for a response (best-effort, backpressured). + * Prevents large pastes from timing out and dropping chunks when the daemon + * is busy processing output. + */ + writeNoAck(request: WriteRequest): void { + void this.ensureConnected() + .then(() => { + this.sendNotification("write", request); + }) + .catch((error) => { + this.emit("error", error instanceof Error ? error : new Error(String(error))); + }); + } + /** * Resize a terminal session */ diff --git a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts index ad30a0dd7b0..15460908784 100644 --- a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts +++ b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts @@ -23,6 +23,9 @@ import { const ESC = "\x1b"; const BEL = "\x07"; +const DEBUG_EMULATOR_TIMING = + process.env.SUPERSET_TERMINAL_EMULATOR_DEBUG === "1"; + /** * DECSET/DECRST mode numbers we track */ @@ -118,11 +121,27 @@ export class HeadlessEmulator { write(data: string): void { if (this.disposed) return; - // Parse escape sequences with chunk-safe buffering + if (!DEBUG_EMULATOR_TIMING) { + // Parse escape sequences with chunk-safe buffering + this.parseEscapeSequences(data); + // Write to headless terminal (buffered/async) + this.terminal.write(data); + return; + } + + const parseStart = performance.now(); this.parseEscapeSequences(data); + const parseTime = performance.now() - parseStart; - // Write to headless terminal (buffered/async) + const terminalStart = performance.now(); this.terminal.write(data); + const terminalTime = performance.now() - terminalStart; + + if (parseTime > 2 || terminalTime > 2) { + console.warn( + `[HeadlessEmulator] write(${data.length}b): parse=${parseTime.toFixed(1)}ms, terminal=${terminalTime.toFixed(1)}ms`, + ); + } } /** diff --git a/apps/desktop/src/main/lib/terminal-host/types.ts b/apps/desktop/src/main/lib/terminal-host/types.ts index 19734616cad..f63303b801b 100644 --- a/apps/desktop/src/main/lib/terminal-host/types.ts +++ b/apps/desktop/src/main/lib/terminal-host/types.ts @@ -284,7 +284,20 @@ export interface TerminalExitEvent { signal?: number; } -export type TerminalEvent = TerminalDataEvent | TerminalExitEvent; +/** + * Terminal error event (e.g., write queue full, subprocess error) + */ +export interface TerminalErrorEvent { + type: "error"; + error: string; + /** Error code for programmatic handling */ + code?: "WRITE_QUEUE_FULL" | "SUBPROCESS_ERROR" | "WRITE_FAILED" | "UNKNOWN"; +} + +export type TerminalEvent = + | TerminalDataEvent + | TerminalExitEvent + | TerminalErrorEvent; // ============================================================================= // Request/Response Type Map diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 43fd0df4a5f..4fbaea5b8e0 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -129,6 +129,18 @@ export class DaemonTerminalManager extends EventEmitter { } } }); + + // Terminal-specific errors (e.g., subprocess backpressure limits) + this.client.on( + "terminalError", + (sessionId: string, error: string, code?: string) => { + const paneId = sessionId; + console.error( + `[DaemonTerminalManager] Terminal error for ${paneId}: ${code ?? "UNKNOWN"}: ${error}`, + ); + this.emit(`error:${paneId}`, { error, code }); + }, + ); } // =========================================================================== @@ -249,13 +261,9 @@ export class DaemonTerminalManager extends EventEmitter { throw new Error(`Terminal session ${paneId} not found or not alive`); } - // Fire and forget - daemon will handle the write - this.client.write({ sessionId: paneId, data }).catch((error) => { - console.error( - `[DaemonTerminalManager] Write failed for ${paneId}:`, - error, - ); - }); + // Fire and forget - daemon will handle the write. + // Use the no-ack fast path to avoid per-chunk request timeouts under load. + this.client.writeNoAck({ sessionId: paneId, data }); session.lastActive = Date.now(); } @@ -451,12 +459,7 @@ export class DaemonTerminalManager extends EventEmitter { refreshPromptsForWorkspace(workspaceId: string): void { for (const [paneId, session] of this.sessions.entries()) { if (session.workspaceId === workspaceId && session.isAlive) { - this.client.write({ sessionId: paneId, data: "\n" }).catch((error) => { - console.warn( - `[DaemonTerminalManager] Failed to refresh prompt for pane ${paneId}:`, - error, - ); - }); + this.client.writeNoAck({ sessionId: paneId, data: "\n" }); } } } diff --git a/apps/desktop/src/main/lib/terminal/manager.ts b/apps/desktop/src/main/lib/terminal/manager.ts index 84522cde550..dc1aeb34563 100644 --- a/apps/desktop/src/main/lib/terminal/manager.ts +++ b/apps/desktop/src/main/lib/terminal/manager.ts @@ -110,6 +110,7 @@ export class TerminalManager extends EventEmitter { session.pty.onExit(async ({ exitCode, signal }) => { session.isAlive = false; + session.writeQueue.dispose(); flushSession(session); // Check if shell crashed quickly - try fallback @@ -163,7 +164,9 @@ export class TerminalManager extends EventEmitter { throw new Error(`Terminal session ${paneId} not found or not alive`); } - session.pty.write(data); + if (!session.writeQueue.write(data)) { + throw new Error(`Terminal ${paneId} write queue full`); + } session.lastActive = Date.now(); } @@ -314,12 +317,14 @@ export class TerminalManager extends EventEmitter { ): Promise { if (!session.isAlive) { session.deleteHistoryOnExit = true; + session.writeQueue.dispose(); await closeSessionHistory(session); this.sessions.delete(paneId); return true; } session.deleteHistoryOnExit = true; + session.writeQueue.dispose(); return new Promise((resolve) => { let resolved = false; @@ -392,7 +397,7 @@ export class TerminalManager extends EventEmitter { for (const [paneId, session] of this.sessions.entries()) { if (session.workspaceId === workspaceId && session.isAlive) { try { - session.pty.write("\n"); + session.writeQueue.write("\n"); } catch (error) { console.warn( `[TerminalManager] Failed to refresh prompt for pane ${paneId}:`, @@ -436,8 +441,10 @@ export class TerminalManager extends EventEmitter { }); exitPromises.push(exitPromise); + session.writeQueue.dispose(); session.pty.kill(); } else { + session.writeQueue.dispose(); await closeSessionHistory(session); } } diff --git a/apps/desktop/src/main/lib/terminal/port-manager.ts b/apps/desktop/src/main/lib/terminal/port-manager.ts index b848024fc85..5d8995ffa1d 100644 --- a/apps/desktop/src/main/lib/terminal/port-manager.ts +++ b/apps/desktop/src/main/lib/terminal/port-manager.ts @@ -328,13 +328,25 @@ class PortManager extends EventEmitter { const buffered = this.lineBuffers.get(paneId) || ""; const combined = buffered + data; - // Split by newlines - const parts = combined.split(/\r?\n/); + // Fast path: avoid splitting/regex on obviously irrelevant output (e.g., full-screen TUIs). + // Still maintain the incomplete-line buffer so patterns spanning chunks can be detected later. + const lastNewlineIndex = Math.max( + combined.lastIndexOf("\n"), + combined.lastIndexOf("\r"), + ); + + // No newline yet → only an incomplete line to buffer. + if (lastNewlineIndex === -1) { + if (combined.length <= MAX_LINE_BUFFER) { + this.lineBuffers.set(paneId, combined); + } else { + this.lineBuffers.delete(paneId); + } + return; + } - // If data doesn't end with a newline, the last part is incomplete - buffer it - const endsWithNewline = /[\r\n]$/.test(data); - const completeLines = endsWithNewline ? parts : parts.slice(0, -1); - const incompleteLine = endsWithNewline ? "" : (parts.at(-1) ?? ""); + const completePart = combined.slice(0, lastNewlineIndex); + const incompleteLine = combined.slice(lastNewlineIndex + 1); // Update buffer (with size limit to prevent memory issues) if (incompleteLine && incompleteLine.length <= MAX_LINE_BUFFER) { @@ -343,13 +355,26 @@ class PortManager extends EventEmitter { this.lineBuffers.delete(paneId); } - // Process complete lines + // Heuristic: only do full line processing if the chunk *looks* like it could contain a port. + // Sample both the head and tail to handle long logs without scanning huge strings. + const sample = + completePart.length > 4096 + ? `${completePart.slice(0, 2048)}${completePart.slice(-2048)}` + : completePart; + const looksRelevant = + /(?:localhost|127\.0\.0\.1|0\.0\.0\.0|https?:\/\/|listening|started|ready|running|\bon port\b)/i.test( + sample, + ); + if (!looksRelevant) return; + + // Split by newlines (only on the completed portion) + const completeLines = completePart.split(/\r?\n/); + for (const line of completeLines) { if (!line.trim()) continue; const port = extractPort(line); if (port !== null) { - // Schedule verification - port will only be added if it's actually listening this.schedulePortVerification(port, paneId, workspaceId, line); } } diff --git a/apps/desktop/src/main/lib/terminal/pty-write-queue.ts b/apps/desktop/src/main/lib/terminal/pty-write-queue.ts new file mode 100644 index 00000000000..f0e35c90a9b --- /dev/null +++ b/apps/desktop/src/main/lib/terminal/pty-write-queue.ts @@ -0,0 +1,150 @@ +import type { IPty } from "node-pty"; + +/** + * A write queue for PTY that prevents blocking the event loop. + * + * Problem: node-pty's write() is synchronous and blocks when the kernel's + * PTY buffer fills up (~4KB on macOS). Large pastes (e.g., 16KB+) can freeze + * the entire daemon, causing all requests to timeout. + * + * Solution: Queue writes and process them in chunks, yielding to the event + * loop between chunks. This keeps the daemon responsive while still delivering + * all data to the PTY. + * + * Features: + * - Chunked writes to prevent blocking + * - Memory-bounded queue to prevent OOM + * - Backpressure signaling when queue is full + * - Graceful handling of PTY closure + */ +export class PtyWriteQueue { + private queue: string[] = []; + private queuedBytes = 0; + private flushing = false; + private disposed = false; + + /** + * Size of each write chunk. Smaller = more responsive but slower throughput. + * 256 bytes keeps individual blocks short (~1-5ms typically). + */ + private readonly CHUNK_SIZE = 256; + + /** + * Delay between chunks in ms. Gives event loop time to process other work. + */ + private readonly CHUNK_DELAY_MS = 1; + + /** + * Maximum bytes allowed in queue. Prevents OOM if PTY stops consuming. + * 1MB is generous - a typical large paste is ~50KB. + */ + private readonly MAX_QUEUE_BYTES = 1_000_000; + + constructor( + private pty: IPty, + private onDrain?: () => void, + ) {} + + /** + * Queue data to be written to the PTY. + * @returns true if queued, false if queue is full (backpressure) + */ + write(data: string): boolean { + if (this.disposed) { + return false; + } + + if (this.queuedBytes + data.length > this.MAX_QUEUE_BYTES) { + console.warn( + `[PtyWriteQueue] Queue full (${this.queuedBytes} bytes), rejecting write of ${data.length} bytes`, + ); + return false; + } + + this.queue.push(data); + this.queuedBytes += data.length; + this.scheduleFlush(); + return true; + } + + /** + * Schedule the flush loop if not already running. + */ + private scheduleFlush(): void { + if (this.flushing || this.disposed) return; + this.flushing = true; + setTimeout(() => this.flush(), 0); + } + + /** + * Process one chunk from the queue and schedule the next. + */ + private flush(): void { + if (this.disposed) { + this.flushing = false; + return; + } + + if (this.queue.length === 0) { + this.flushing = false; + this.onDrain?.(); + return; + } + + // Take a chunk from front of queue + let chunk = this.queue[0]; + if (chunk.length > this.CHUNK_SIZE) { + // Split: take CHUNK_SIZE, leave rest in queue + this.queue[0] = chunk.slice(this.CHUNK_SIZE); + chunk = chunk.slice(0, this.CHUNK_SIZE); + } else { + // Take entire item + this.queue.shift(); + } + + this.queuedBytes -= chunk.length; + + try { + this.pty.write(chunk); + } catch (error) { + // PTY might be closed - clear queue and stop + console.warn("[PtyWriteQueue] Write failed, clearing queue:", error); + this.clear(); + this.flushing = false; + return; + } + + // Yield to event loop with a small delay, allowing other work to run + setTimeout(() => this.flush(), this.CHUNK_DELAY_MS); + } + + /** + * Number of bytes currently queued. + */ + get pending(): number { + return this.queuedBytes; + } + + /** + * Whether there's data waiting to be written. + */ + get hasPending(): boolean { + return this.queuedBytes > 0; + } + + /** + * Clear all pending writes. + */ + clear(): void { + this.queue = []; + this.queuedBytes = 0; + } + + /** + * Stop processing and clear queue. + */ + dispose(): void { + this.disposed = true; + this.clear(); + } +} diff --git a/apps/desktop/src/main/lib/terminal/session.ts b/apps/desktop/src/main/lib/terminal/session.ts index 08b5c559f00..e8ba5d04a1d 100644 --- a/apps/desktop/src/main/lib/terminal/session.ts +++ b/apps/desktop/src/main/lib/terminal/session.ts @@ -9,6 +9,7 @@ import { import { HistoryReader, HistoryWriter } from "../terminal-history"; import { buildTerminalEnv, FALLBACK_SHELL, getDefaultShell } from "./env"; import { portManager } from "./port-manager"; +import { PtyWriteQueue } from "./pty-write-queue"; import type { InternalCreateSessionParams, TerminalSession } from "./types"; const DEFAULT_COLS = 80; @@ -122,6 +123,8 @@ export async function createSession( onData(paneId, batchedData); }); + const writeQueue = new PtyWriteQueue(ptyProcess); + return { pty: ptyProcess, paneId, @@ -135,6 +138,7 @@ export async function createSession( wasRecovered, historyWriter, dataBatcher, + writeQueue, shell, startTime: Date.now(), usedFallback: useFallbackShell, @@ -186,7 +190,7 @@ export function setupDataHandler( } if (session.isAlive) { - session.pty.write(initialCommandString); + session.writeQueue.write(initialCommandString); } })(); } diff --git a/apps/desktop/src/main/lib/terminal/types.ts b/apps/desktop/src/main/lib/terminal/types.ts index 64ee71ba1ee..b7d2b4eff29 100644 --- a/apps/desktop/src/main/lib/terminal/types.ts +++ b/apps/desktop/src/main/lib/terminal/types.ts @@ -1,6 +1,7 @@ import type * as pty from "node-pty"; import type { DataBatcher } from "../data-batcher"; import type { HistoryWriter } from "../terminal-history"; +import type { PtyWriteQueue } from "./pty-write-queue"; export interface TerminalSession { pty: pty.IPty; @@ -16,6 +17,8 @@ export interface TerminalSession { wasRecovered: boolean; historyWriter?: HistoryWriter; dataBatcher: DataBatcher; + /** Queued writer to prevent blocking on large writes */ + writeQueue: PtyWriteQueue; shell: string; startTime: number; usedFallback: boolean; diff --git a/apps/desktop/src/main/terminal-host/index.ts b/apps/desktop/src/main/terminal-host/index.ts index 255c8c3fbaf..9353f240011 100644 --- a/apps/desktop/src/main/terminal-host/index.ts +++ b/apps/desktop/src/main/terminal-host/index.ts @@ -30,6 +30,7 @@ import { type DetachRequest, type HelloRequest, type HelloResponse, + type IpcEvent, type IpcErrorResponse, type IpcRequest, type IpcSuccessResponse, @@ -38,6 +39,7 @@ import { PROTOCOL_VERSION, type ResizeRequest, type ShutdownRequest, + type TerminalErrorEvent, type WriteRequest, } from "../lib/terminal-host/types"; import { TerminalHost } from "./terminal-host"; @@ -244,8 +246,39 @@ const handlers: Record = { } const request = payload as WriteRequest; - const response = terminalHost.write(request); - sendSuccess(socket, id, response); + + const isNotify = id.startsWith("notify_"); + + try { + const response = terminalHost.write(request); + // High-frequency write notifications don't need responses; suppress to avoid + // saturating the socket and dropping input under load. + if (!isNotify) { + sendSuccess(socket, id, response); + } + } catch (error) { + const message = error instanceof Error ? error.message : "Write failed"; + + if (isNotify) { + // Emit a session-scoped error event so the main process can surface it. + // (No response is sent for notify writes.) + const event: IpcEvent = { + type: "event", + event: "error", + sessionId: request.sessionId, + payload: { + type: "error", + error: message, + code: "WRITE_FAILED", + } satisfies TerminalErrorEvent, + }; + socket.write(`${JSON.stringify(event)}\n`); + log("warn", `Write failed for ${request.sessionId}`, { error: message }); + return; + } + + sendError(socket, id, "WRITE_FAILED", message); + } }, resize: (socket, id, payload, clientState) => { diff --git a/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts b/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts new file mode 100644 index 00000000000..28d35c156a1 --- /dev/null +++ b/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts @@ -0,0 +1,128 @@ +export enum PtySubprocessIpcType { + // Daemon -> subprocess commands + Spawn = 1, + Write = 2, + Resize = 3, + Kill = 4, + Dispose = 5, + + // Subprocess -> daemon events + Ready = 101, + Spawned = 102, + Data = 103, + Exit = 104, + Error = 105, +} + +export interface PtySubprocessFrame { + type: PtySubprocessIpcType; + payload: Buffer; +} + +const HEADER_BYTES = 5; +const EMPTY_PAYLOAD = Buffer.alloc(0); + +// Hard cap to avoid OOM if the stream is corrupted. +// PTY data is untrusted input in practice (terminal apps can emit arbitrarily). +const MAX_FRAME_BYTES = 64 * 1024 * 1024; // 64MB + +export function createFrameHeader( + type: PtySubprocessIpcType, + payloadLength: number, +): Buffer { + const header = Buffer.allocUnsafe(HEADER_BYTES); + header.writeUInt8(type, 0); + header.writeUInt32LE(payloadLength, 1); + return header; +} + +export function writeFrame( + writable: NodeJS.WritableStream, + type: PtySubprocessIpcType, + payload?: Buffer, +): boolean { + const payloadBuffer = payload ?? EMPTY_PAYLOAD; + const header = createFrameHeader(type, payloadBuffer.length); + + let canWrite = writable.write(header); + + // Always write payload even if the header write returns false. + // Backpressure is represented by the return value + 'drain' events. + if (payloadBuffer.length > 0) { + canWrite = writable.write(payloadBuffer) && canWrite; + } + + return canWrite; +} + +export class PtySubprocessFrameDecoder { + private header = Buffer.allocUnsafe(HEADER_BYTES); + private headerOffset = 0; + private frameType: PtySubprocessIpcType | null = null; + private payload: Buffer | null = null; + private payloadOffset = 0; + + push(chunk: Buffer): PtySubprocessFrame[] { + const frames: PtySubprocessFrame[] = []; + + let offset = 0; + while (offset < chunk.length) { + if (this.payload === null) { + const headerNeeded = HEADER_BYTES - this.headerOffset; + const available = chunk.length - offset; + const toCopy = Math.min(headerNeeded, available); + + chunk.copy(this.header, this.headerOffset, offset, offset + toCopy); + this.headerOffset += toCopy; + offset += toCopy; + + if (this.headerOffset < HEADER_BYTES) { + continue; + } + + const type = this.header.readUInt8(0) as PtySubprocessIpcType; + const payloadLength = this.header.readUInt32LE(1); + + if (payloadLength > MAX_FRAME_BYTES) { + throw new Error( + `PtySubprocess IPC frame too large: ${payloadLength} bytes`, + ); + } + + this.frameType = type; + this.payload = payloadLength > 0 ? Buffer.allocUnsafe(payloadLength) : null; + this.payloadOffset = 0; + this.headerOffset = 0; + + if (payloadLength === 0) { + frames.push({ type, payload: EMPTY_PAYLOAD }); + this.frameType = null; + } + } else { + const payloadNeeded = this.payload.length - this.payloadOffset; + const available = chunk.length - offset; + const toCopy = Math.min(payloadNeeded, available); + + chunk.copy(this.payload, this.payloadOffset, offset, offset + toCopy); + this.payloadOffset += toCopy; + offset += toCopy; + + if (this.payloadOffset < this.payload.length) { + continue; + } + + const type = this.frameType ?? PtySubprocessIpcType.Error; + const payload = this.payload; + + this.frameType = null; + this.payload = null; + this.payloadOffset = 0; + + frames.push({ type, payload }); + } + } + + return frames; + } +} + diff --git a/apps/desktop/src/main/terminal-host/pty-subprocess.ts b/apps/desktop/src/main/terminal-host/pty-subprocess.ts new file mode 100644 index 00000000000..01cf0472685 --- /dev/null +++ b/apps/desktop/src/main/terminal-host/pty-subprocess.ts @@ -0,0 +1,415 @@ +/** + * PTY Subprocess + * + * This runs as a completely separate process, owning a single PTY. + * Process isolation guarantees that a blocked PTY won't stall the daemon. + * + * Communication via stdin/stdout using a small binary framing protocol + * to avoid JSON escaping overhead on escape-sequence-heavy PTY output. + */ + +import * as pty from "node-pty"; +import type { IPty } from "node-pty"; +import { write as fsWrite } from "node:fs"; +import { + PtySubprocessFrameDecoder, + PtySubprocessIpcType, + writeFrame, +} from "./pty-subprocess-ipc"; + +// ============================================================================= +// Types (kept local to avoid bundling/import surprises) +// ============================================================================= + +interface SpawnPayload { + shell: string; + args: string[]; + cwd: string; + cols: number; + rows: number; + env: Record; +} + +// ============================================================================= +// State +// ============================================================================= + +let ptyProcess: IPty | null = null; +let ptyFd: number | null = null; + +// Write queue for stdin (uses async fs.write on the PTY fd to avoid blocking the event loop) +const writeQueue: Buffer[] = []; +let queuedBytes = 0; +let flushing = false; +let writeBackoffMs = 0; +const MIN_WRITE_BACKOFF_MS = 2; +const MAX_WRITE_BACKOFF_MS = 50; + +let stdinPaused = false; +const INPUT_QUEUE_HIGH_WATERMARK_BYTES = 8 * 1024 * 1024; // 8MB +const INPUT_QUEUE_LOW_WATERMARK_BYTES = 4 * 1024 * 1024; // 4MB +// Hard cap to avoid runaway memory usage if upstream misbehaves. +const INPUT_QUEUE_HARD_LIMIT_BYTES = 64 * 1024 * 1024; // 64MB + +// Output batching - collect PTY output and send periodically. +// CRITICAL: Use array buffering to avoid O(n²) string concatenation. +let outputChunks: string[] = []; +let outputBytesQueued = 0; +let outputFlushScheduled = false; +const OUTPUT_FLUSH_INTERVAL_MS = 32; // ~30 fps max +const MAX_OUTPUT_BATCH_SIZE_BYTES = 128 * 1024; // 128KB max per flush + +// Backpressure - track if stdout is draining +let stdoutDraining = true; +let ptyPaused = false; + +const DEBUG_OUTPUT_BATCHING = + process.env.SUPERSET_PTY_SUBPROCESS_DEBUG === "1"; + +// ============================================================================= +// Helpers +// ============================================================================= + +function send(type: PtySubprocessIpcType, payload?: Buffer): void { + stdoutDraining = writeFrame(process.stdout, type, payload); + + // If stdout buffer is full, pause PTY reads (reduces runaway buffering/CPU). + if (!stdoutDraining && ptyProcess && !ptyPaused) { + ptyPaused = true; + ptyProcess.pause(); + } +} + +process.stdout.on("drain", () => { + stdoutDraining = true; + if (ptyPaused && ptyProcess) { + ptyPaused = false; + ptyProcess.resume(); + } +}); + +function sendError(message: string): void { + send(PtySubprocessIpcType.Error, Buffer.from(message, "utf8")); +} + +/** + * Queue PTY output for batched sending. + * Flushes immediately if batch exceeds MAX_OUTPUT_BATCH_SIZE_BYTES. + */ +function queueOutput(data: string): void { + outputChunks.push(data); + outputBytesQueued += Buffer.byteLength(data, "utf8"); + + if (outputBytesQueued >= MAX_OUTPUT_BATCH_SIZE_BYTES) { + outputFlushScheduled = false; + flushOutput(); + return; + } + + if (!outputFlushScheduled) { + outputFlushScheduled = true; + setTimeout(flushOutput, OUTPUT_FLUSH_INTERVAL_MS); + } +} + +function flushOutput(): void { + outputFlushScheduled = false; + if (outputChunks.length === 0) return; + + const data = outputChunks.join(""); + const chunkCount = outputChunks.length; + outputChunks = []; + outputBytesQueued = 0; + + const payload = Buffer.from(data, "utf8"); + + if (DEBUG_OUTPUT_BATCHING) { + console.error( + `[pty-subprocess] Flushing ${payload.length} bytes (${chunkCount} chunks batched)`, + ); + } + + send(PtySubprocessIpcType.Data, payload); +} + +function maybePauseStdin(): void { + if (stdinPaused) return; + if (queuedBytes < INPUT_QUEUE_HIGH_WATERMARK_BYTES) return; + + stdinPaused = true; + process.stdin.pause(); +} + +function maybeResumeStdin(): void { + if (!stdinPaused) return; + if (queuedBytes > INPUT_QUEUE_LOW_WATERMARK_BYTES) return; + + stdinPaused = false; + process.stdin.resume(); +} + +function queueWriteBuffer(buf: Buffer): void { + if (queuedBytes + buf.length > INPUT_QUEUE_HARD_LIMIT_BYTES) { + // This should never happen for normal pastes; avoid OOM if it does. + sendError("Input backlog exceeded hard limit"); + return; + } + + writeQueue.push(buf); + queuedBytes += buf.length; + maybePauseStdin(); + scheduleFlush(); +} + +function scheduleFlush(): void { + if (flushing) return; + flushing = true; + setImmediate(flush); +} + +function flush(): void { + if (!ptyProcess || writeQueue.length === 0) { + flushing = false; + return; + } + + // If we can access the PTY fd, use async fs.write to avoid blocking the JS event loop. + if (typeof ptyFd === "number" && ptyFd > 0) { + const buf = writeQueue[0]; + + fsWrite(ptyFd, buf, 0, buf.length, null, (err, bytesWritten) => { + if (err) { + const code = (err as NodeJS.ErrnoException).code; + // PTY fds are often non-blocking. If the kernel buffer is full, + // writes can fail with EAGAIN/EWOULDBLOCK. This is normal backpressure; + // retry later instead of dropping the paste. + if (code === "EAGAIN" || code === "EWOULDBLOCK") { + writeBackoffMs = + writeBackoffMs === 0 + ? MIN_WRITE_BACKOFF_MS + : Math.min(writeBackoffMs * 2, MAX_WRITE_BACKOFF_MS); + if (DEBUG_OUTPUT_BATCHING && writeBackoffMs === MIN_WRITE_BACKOFF_MS) { + console.error("[pty-subprocess] PTY input backpressured (EAGAIN)"); + } + setTimeout(flush, writeBackoffMs); + return; + } + + sendError( + `Write failed: ${err instanceof Error ? err.message : String(err)}`, + ); + writeQueue.length = 0; + queuedBytes = 0; + flushing = false; + return; + } + + const wrote = Math.max(0, bytesWritten ?? 0); + writeBackoffMs = 0; + queuedBytes -= wrote; + + if (wrote >= buf.length) { + writeQueue.shift(); + } else { + writeQueue[0] = buf.subarray(wrote); + } + + maybeResumeStdin(); + + if (writeQueue.length > 0) { + setImmediate(flush); + } else { + flushing = false; + } + }); + return; + } + + // Fallback: node-pty's write() is synchronous and can block. + // This path should rarely be used on macOS, but keep it for safety. + let chunk = writeQueue.shift(); + if (!chunk) { + flushing = false; + return; + } + + queuedBytes -= chunk.length; + maybeResumeStdin(); + + try { + ptyProcess.write(chunk.toString("utf8")); + } catch (error) { + sendError( + `Write failed: ${error instanceof Error ? error.message : String(error)}`, + ); + writeQueue.length = 0; + queuedBytes = 0; + flushing = false; + return; + } + + if (writeQueue.length > 0) { + setImmediate(flush); + return; + } + + flushing = false; +} + +// ============================================================================= +// Message Handlers +// ============================================================================= + +function handleSpawn(payload: Buffer): void { + if (ptyProcess) { + sendError("PTY already spawned"); + return; + } + + let msg: SpawnPayload; + try { + msg = JSON.parse(payload.toString("utf8")) as SpawnPayload; + } catch (error) { + sendError( + `Spawn payload parse failed: ${error instanceof Error ? error.message : String(error)}`, + ); + return; + } + + try { + ptyProcess = pty.spawn(msg.shell, msg.args, { + name: "xterm-256color", + cols: msg.cols, + rows: msg.rows, + cwd: msg.cwd, + env: msg.env, + }); + + ptyFd = (ptyProcess as unknown as { fd?: number }).fd ?? null; + if (DEBUG_OUTPUT_BATCHING) { + console.error( + `[pty-subprocess] PTY fd ${ptyFd ?? "unknown"} (${typeof ptyFd === "number" ? "async fs.write enabled" : "falling back to pty.write"})`, + ); + } + + ptyProcess.onData((data) => { + queueOutput(data); + }); + + ptyProcess.onExit(({ exitCode, signal }) => { + flushOutput(); + + const exitPayload = Buffer.allocUnsafe(8); + exitPayload.writeInt32LE(exitCode ?? 0, 0); + exitPayload.writeInt32LE(signal ?? 0, 4); + send(PtySubprocessIpcType.Exit, exitPayload); + + ptyProcess = null; + ptyFd = null; + setTimeout(() => process.exit(0), 100); + }); + + const pidPayload = Buffer.allocUnsafe(4); + pidPayload.writeUInt32LE(ptyProcess.pid ?? 0, 0); + send(PtySubprocessIpcType.Spawned, pidPayload); + } catch (error) { + sendError( + `Spawn failed: ${error instanceof Error ? error.message : String(error)}`, + ); + } +} + +function handleWrite(payload: Buffer): void { + if (!ptyProcess) { + sendError("PTY not spawned"); + return; + } + + queueWriteBuffer(payload); +} + +function handleResize(payload: Buffer): void { + if (!ptyProcess) return; + if (payload.length < 8) return; + try { + const cols = payload.readUInt32LE(0); + const rows = payload.readUInt32LE(4); + ptyProcess.resize(cols, rows); + } catch { + // Ignore resize errors + } +} + +function handleKill(payload: Buffer): void { + if (!ptyProcess) return; + try { + const signal = payload.length > 0 ? payload.toString("utf8") : undefined; + ptyProcess.kill(signal); + } catch { + // Ignore + } +} + +function handleDispose(): void { + flushOutput(); + + writeQueue.length = 0; + queuedBytes = 0; + flushing = false; + outputChunks = []; + outputBytesQueued = 0; + outputFlushScheduled = false; + ptyFd = null; + + if (ptyProcess) { + try { + ptyProcess.kill("SIGKILL"); + } catch { + // Ignore + } + ptyProcess = null; + } + + process.exit(0); +} + +// ============================================================================= +// Main +// ============================================================================= + +const decoder = new PtySubprocessFrameDecoder(); + +process.stdin.on("data", (chunk: Buffer) => { + try { + const frames = decoder.push(chunk); + for (const frame of frames) { + switch (frame.type) { + case PtySubprocessIpcType.Spawn: + handleSpawn(frame.payload); + break; + case PtySubprocessIpcType.Write: + handleWrite(frame.payload); + break; + case PtySubprocessIpcType.Resize: + handleResize(frame.payload); + break; + case PtySubprocessIpcType.Kill: + handleKill(frame.payload); + break; + case PtySubprocessIpcType.Dispose: + handleDispose(); + break; + } + } + } catch (error) { + sendError( + `Failed to parse frame: ${error instanceof Error ? error.message : String(error)}`, + ); + } +}); + +process.stdin.on("end", () => { + handleDispose(); +}); + +send(PtySubprocessIpcType.Ready); diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index 2ff403eadec..f4d52e258f9 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -2,23 +2,30 @@ * Terminal Host Session * * A session owns: - * - A PTY process (node-pty) + * - A PTY subprocess (isolates blocking writes from main daemon) * - A HeadlessEmulator instance for state tracking * - A set of attached clients * - Output capture to disk */ +import * as path from "node:path"; import type { Socket } from "node:net"; -import * as pty from "node-pty"; +import { spawn, type ChildProcess } from "node:child_process"; import { HeadlessEmulator } from "../lib/terminal-host/headless-emulator"; import type { CreateOrAttachRequest, IpcEvent, SessionMeta, TerminalDataEvent, + TerminalErrorEvent, TerminalExitEvent, TerminalSnapshot, } from "../lib/terminal-host/types"; +import { + PtySubprocessFrameDecoder, + PtySubprocessIpcType, + createFrameHeader, +} from "./pty-subprocess-ipc"; // ============================================================================= // Types @@ -57,12 +64,25 @@ export class Session { readonly shell: string; readonly createdAt: Date; - private ptyProcess: pty.IPty | null = null; + private subprocess: ChildProcess | null = null; + private subprocessReady = false; + private ptyPid: number | null = null; private emulator: HeadlessEmulator; private attachedClients: Map = new Map(); + private clientSocketsWaitingForDrain: Set = new Set(); + private subprocessStdoutPaused = false; private lastAttachedAt: Date; private exitCode: number | null = null; private disposed = false; + private subprocessDecoder: PtySubprocessFrameDecoder | null = null; + private subprocessStdinQueue: Buffer[] = []; + private subprocessStdinQueuedBytes = 0; + private subprocessStdinDrainArmed = false; + + private emulatorWriteQueue: string[] = []; + private emulatorWriteQueuedBytes = 0; + private emulatorWriteScheduled = false; + private emulatorFlushWaiters: Array<() => void> = []; // Callbacks private onSessionExit?: ( @@ -93,16 +113,18 @@ export class Session { // Listen for emulator output (query responses) this.emulator.onData((data) => { // If no clients attached, send responses back to PTY - // This allows TUIs to function while app is closed - if (this.attachedClients.size === 0 && this.ptyProcess) { - this.ptyProcess.write(data); + if ( + this.attachedClients.size === 0 && + this.subprocess && + this.subprocessReady + ) { + this.sendWriteToSubprocess(data); } - // When clients are attached, the renderer handles responses }); } /** - * Spawn the PTY process + * Spawn the PTY process via subprocess */ spawn(options: { cwd: string; @@ -110,7 +132,7 @@ export class Session { rows: number; env?: Record; }): void { - if (this.ptyProcess) { + if (this.subprocess) { throw new Error("PTY already spawned"); } @@ -119,53 +141,368 @@ export class Session { // Build environment - filter out undefined values and ELECTRON_RUN_AS_NODE const processEnv: Record = {}; for (const [key, value] of Object.entries(process.env)) { - // Skip ELECTRON_RUN_AS_NODE (daemon runs with this, but spawned shells shouldn't) if (key === "ELECTRON_RUN_AS_NODE") continue; if (value !== undefined) { processEnv[key] = value; } } - // Add custom env vars Object.assign(processEnv, env); - // Ensure TERM is set processEnv.TERM = "xterm-256color"; // Get shell args const shellArgs = this.getShellArgs(this.shell); - this.ptyProcess = pty.spawn(this.shell, shellArgs, { - name: "xterm-256color", + // Spawn PTY subprocess + // The subprocess script is bundled alongside terminal-host.js + const subprocessPath = path.join(__dirname, "pty-subprocess.js"); + + // Use electron as node to run the subprocess + const electronPath = process.execPath; + this.subprocess = spawn(electronPath, [subprocessPath], { + stdio: ["pipe", "pipe", "inherit"], // pipe stdin/stdout, inherit stderr + env: { + ...process.env, + ELECTRON_RUN_AS_NODE: "1", + }, + }); + + // Read framed messages from subprocess stdout + if (this.subprocess.stdout) { + this.subprocessDecoder = new PtySubprocessFrameDecoder(); + this.subprocess.stdout.on("data", (chunk: Buffer) => { + try { + const frames = this.subprocessDecoder?.push(chunk) ?? []; + for (const frame of frames) { + this.handleSubprocessFrame(frame.type, frame.payload); + } + } catch (error) { + console.error( + `[Session ${this.sessionId}] Failed to parse subprocess frames:`, + error, + ); + } + }); + } + + // Handle subprocess exit + this.subprocess.on("exit", (code) => { + console.log( + `[Session ${this.sessionId}] Subprocess exited with code ${code}`, + ); + this.handleSubprocessExit(code ?? -1); + }); + + this.subprocess.on("error", (error) => { + console.error(`[Session ${this.sessionId}] Subprocess error:`, error); + this.handleSubprocessExit(-1); + }); + + // Store pending spawn config + this.pendingSpawn = { + shell: this.shell, + args: shellArgs, + cwd, cols, rows, - cwd, env: processEnv, - }); + }; + } - // Handle PTY data - this.ptyProcess.onData((data) => { - // Feed data to emulator for state tracking - this.emulator.write(data); + private pendingSpawn: { + shell: string; + args: string[]; + cwd: string; + cols: number; + rows: number; + env: Record; + } | null = null; - // Send to all attached clients - this.broadcastEvent("data", { - type: "data", - data, - } satisfies TerminalDataEvent); - }); + /** + * Handle frames from the PTY subprocess + */ + private handleSubprocessFrame( + type: PtySubprocessIpcType, + payload: Buffer, + ): void { + switch (type) { + case PtySubprocessIpcType.Ready: + this.subprocessReady = true; + console.log( + `[Session ${this.sessionId}] Subprocess ready, spawning PTY`, + ); + if (this.pendingSpawn) { + this.sendSpawnToSubprocess(this.pendingSpawn); + this.pendingSpawn = null; + } + break; + + case PtySubprocessIpcType.Spawned: + this.ptyPid = payload.length >= 4 ? payload.readUInt32LE(0) : null; + console.log( + `[Session ${this.sessionId}] PTY spawned with pid ${this.ptyPid}`, + ); + break; + + case PtySubprocessIpcType.Data: { + if (payload.length === 0) break; + const data = payload.toString("utf8"); + + this.enqueueEmulatorWrite(data); + + this.broadcastEvent("data", { + type: "data", + data, + } satisfies TerminalDataEvent); + break; + } + + case PtySubprocessIpcType.Exit: { + const exitCode = payload.length >= 4 ? payload.readInt32LE(0) : 0; + const signal = payload.length >= 8 ? payload.readInt32LE(4) : 0; + this.exitCode = exitCode; + + this.broadcastEvent("exit", { + type: "exit", + exitCode, + signal: signal !== 0 ? signal : undefined, + } satisfies TerminalExitEvent); + + this.onSessionExit?.( + this.sessionId, + exitCode, + signal !== 0 ? signal : undefined, + ); + break; + } - // Handle PTY exit - this.ptyProcess.onExit(({ exitCode, signal }) => { + case PtySubprocessIpcType.Error: { + const errorMessage = + payload.length > 0 + ? payload.toString("utf8") + : "Unknown subprocess error"; + + console.error( + `[Session ${this.sessionId}] Subprocess error:`, + errorMessage, + ); + + this.broadcastEvent("error", { + type: "error", + error: errorMessage, + code: errorMessage.includes("Write queue full") + ? "WRITE_QUEUE_FULL" + : "SUBPROCESS_ERROR", + } satisfies TerminalErrorEvent); + break; + } + } + } + + /** + * Handle subprocess exiting + */ + private handleSubprocessExit(exitCode: number): void { + if (this.exitCode === null) { this.exitCode = exitCode; - // Notify attached clients this.broadcastEvent("exit", { type: "exit", exitCode, - signal, } satisfies TerminalExitEvent); - // Notify session manager - this.onSessionExit?.(this.sessionId, exitCode, signal); + this.onSessionExit?.(this.sessionId, exitCode); + } + + this.subprocess = null; + this.subprocessReady = false; + this.subprocessDecoder = null; + this.subprocessStdinQueue = []; + this.subprocessStdinQueuedBytes = 0; + this.subprocessStdinDrainArmed = false; + this.subprocessStdoutPaused = false; + + this.emulatorWriteQueue = []; + this.emulatorWriteQueuedBytes = 0; + this.emulatorWriteScheduled = false; + const waiters = this.emulatorFlushWaiters; + this.emulatorFlushWaiters = []; + for (const resolve of waiters) resolve(); + } + + /** + * Flush queued frames to subprocess stdin, respecting stream backpressure. + */ + private flushSubprocessStdinQueue(): void { + if (!this.subprocess?.stdin || this.disposed) return; + + while (this.subprocessStdinQueue.length > 0) { + const buf = this.subprocessStdinQueue[0]; + const canWrite = this.subprocess.stdin.write(buf); + if (!canWrite) { + if (!this.subprocessStdinDrainArmed) { + this.subprocessStdinDrainArmed = true; + this.subprocess.stdin.once("drain", () => { + this.subprocessStdinDrainArmed = false; + this.flushSubprocessStdinQueue(); + }); + } + return; + } + + this.subprocessStdinQueue.shift(); + this.subprocessStdinQueuedBytes -= buf.length; + } + } + + /** + * Send a frame to the subprocess. + * Returns false if write buffer is full (caller should handle). + */ + private sendFrameToSubprocess( + type: PtySubprocessIpcType, + payload?: Buffer, + ): boolean { + if (!this.subprocess?.stdin || this.disposed) return false; + + const payloadBuffer = payload ?? Buffer.alloc(0); + const header = createFrameHeader(type, payloadBuffer.length); + + this.subprocessStdinQueue.push(header); + this.subprocessStdinQueuedBytes += header.length; + + if (payloadBuffer.length > 0) { + this.subprocessStdinQueue.push(payloadBuffer); + this.subprocessStdinQueuedBytes += payloadBuffer.length; + } + + const wasBackpressured = this.subprocessStdinDrainArmed; + this.flushSubprocessStdinQueue(); + + if (this.subprocessStdinDrainArmed && !wasBackpressured) { + console.warn( + `[Session ${this.sessionId}] stdin buffer full, write may be delayed`, + ); + } + + return !this.subprocessStdinDrainArmed; + } + + private sendSpawnToSubprocess(payload: { + shell: string; + args: string[]; + cwd: string; + cols: number; + rows: number; + env: Record; + }): boolean { + return this.sendFrameToSubprocess( + PtySubprocessIpcType.Spawn, + Buffer.from(JSON.stringify(payload), "utf8"), + ); + } + + private sendWriteToSubprocess(data: string): boolean { + // Chunk large writes to avoid allocating/queuing massive single frames. + const MAX_CHUNK_CHARS = 8192; + let ok = true; + + for (let offset = 0; offset < data.length; offset += MAX_CHUNK_CHARS) { + const part = data.slice(offset, offset + MAX_CHUNK_CHARS); + ok = + this.sendFrameToSubprocess( + PtySubprocessIpcType.Write, + Buffer.from(part, "utf8"), + ) && ok; + } + + return ok; + } + + private sendResizeToSubprocess(cols: number, rows: number): boolean { + const payload = Buffer.allocUnsafe(8); + payload.writeUInt32LE(cols, 0); + payload.writeUInt32LE(rows, 4); + return this.sendFrameToSubprocess(PtySubprocessIpcType.Resize, payload); + } + + private sendKillToSubprocess(signal?: string): boolean { + const payload = signal ? Buffer.from(signal, "utf8") : undefined; + return this.sendFrameToSubprocess(PtySubprocessIpcType.Kill, payload); + } + + private sendDisposeToSubprocess(): boolean { + return this.sendFrameToSubprocess(PtySubprocessIpcType.Dispose); + } + + private enqueueEmulatorWrite(data: string): void { + this.emulatorWriteQueue.push(data); + this.emulatorWriteQueuedBytes += data.length; + this.scheduleEmulatorWrite(); + } + + private scheduleEmulatorWrite(): void { + if (this.emulatorWriteScheduled || this.disposed) return; + this.emulatorWriteScheduled = true; + setImmediate(() => { + this.processEmulatorWriteQueue(); + }); + } + + private processEmulatorWriteQueue(): void { + if (this.disposed) { + this.emulatorWriteQueue = []; + this.emulatorWriteQueuedBytes = 0; + this.emulatorWriteScheduled = false; + const waiters = this.emulatorFlushWaiters; + this.emulatorFlushWaiters = []; + for (const resolve of waiters) resolve(); + return; + } + + const start = performance.now(); + const hasClients = this.attachedClients.size > 0; + const backlogBytes = this.emulatorWriteQueuedBytes; + + // Keep the daemon responsive while still ensuring the emulator catches up eventually. + const baseBudgetMs = hasClients ? 5 : 25; + const budgetMs = backlogBytes > 1024 * 1024 ? Math.max(baseBudgetMs, 25) : baseBudgetMs; + const MAX_CHUNK_CHARS = 8192; + + while (this.emulatorWriteQueue.length > 0) { + if (performance.now() - start > budgetMs) break; + + let chunk = this.emulatorWriteQueue[0]; + if (chunk.length > MAX_CHUNK_CHARS) { + this.emulatorWriteQueue[0] = chunk.slice(MAX_CHUNK_CHARS); + chunk = chunk.slice(0, MAX_CHUNK_CHARS); + } else { + this.emulatorWriteQueue.shift(); + } + this.emulatorWriteQueuedBytes -= chunk.length; + this.emulator.write(chunk); + } + + if (this.emulatorWriteQueue.length > 0) { + setImmediate(() => { + this.processEmulatorWriteQueue(); + }); + return; + } + + this.emulatorWriteScheduled = false; + const waiters = this.emulatorFlushWaiters; + this.emulatorFlushWaiters = []; + for (const resolve of waiters) resolve(); + } + + private async flushEmulatorWrites(): Promise { + if (this.emulatorWriteQueue.length === 0 && !this.emulatorWriteScheduled) { + return; + } + + await new Promise((resolve) => { + this.emulatorFlushWaiters.push(resolve); + this.scheduleEmulatorWrite(); }); } @@ -173,7 +510,7 @@ export class Session { * Check if session is alive (PTY running) */ get isAlive(): boolean { - return this.ptyProcess !== null && this.exitCode === null; + return this.subprocess !== null && this.exitCode === null; } /** @@ -185,25 +522,19 @@ export class Session { /** * Attach a client to this session - * Returns a snapshot after flushing any pending writes to ensure consistency - * - * Note: Socket disconnect handling is centralized in the daemon's handleConnection - * to avoid adding per-session listeners which could cause MaxListenersExceededWarning */ async attach(socket: Socket): Promise { if (this.disposed) { throw new Error("Session disposed"); } - // Track client this.attachedClients.set(socket, { socket, attachedAt: Date.now(), }); this.lastAttachedAt = new Date(); - // Return current snapshot after flushing pending writes - // This ensures any output produced while no clients were attached is included + await this.flushEmulatorWrites(); return this.emulator.getSnapshotAsync(); } @@ -212,24 +543,26 @@ export class Session { */ detach(socket: Socket): void { this.attachedClients.delete(socket); + this.clientSocketsWaitingForDrain.delete(socket); + this.maybeResumeSubprocessStdout(); } /** - * Write data to PTY + * Write data to PTY (non-blocking - sent to subprocess) */ write(data: string): void { - if (!this.ptyProcess) { + if (!this.subprocess || !this.subprocessReady) { throw new Error("PTY not spawned"); } - this.ptyProcess.write(data); + this.sendWriteToSubprocess(data); } /** * Resize PTY and emulator */ resize(cols: number, rows: number): void { - if (this.ptyProcess) { - this.ptyProcess.resize(cols, rows); + if (this.subprocess && this.subprocessReady) { + this.sendResizeToSubprocess(cols, rows); } this.emulator.resize(cols, rows); } @@ -242,7 +575,7 @@ export class Session { } /** - * Get session snapshot (for debugging/inspection) + * Get session snapshot */ getSnapshot(): TerminalSnapshot { return this.emulator.getSnapshot(); @@ -270,12 +603,17 @@ export class Session { * Kill the PTY process */ kill(signal: string = "SIGTERM"): void { - if (this.ptyProcess) { - try { - this.ptyProcess.kill(signal); - } catch { - // Process might already be dead - } + if (this.subprocess && this.subprocessReady) { + this.sendKillToSubprocess(signal); + return; + } + + // If the subprocess isn't ready yet, fall back to killing the subprocess itself + // so session termination is reliable ( differentiation isn't meaningful pre-spawn). + try { + this.subprocess?.kill(signal as NodeJS.Signals); + } catch { + // Ignore } } @@ -286,15 +624,31 @@ export class Session { if (this.disposed) return; this.disposed = true; - // Kill PTY - this.kill("SIGKILL"); - this.ptyProcess = null; + if (this.subprocess) { + this.sendDisposeToSubprocess(); + // Force kill after timeout + setTimeout(() => { + this.subprocess?.kill("SIGKILL"); + }, 1000); + this.subprocess = null; + } + this.subprocessReady = false; + this.subprocessDecoder = null; + this.subprocessStdinQueue = []; + this.subprocessStdinQueuedBytes = 0; + this.subprocessStdinDrainArmed = false; + + this.emulatorWriteQueue = []; + this.emulatorWriteQueuedBytes = 0; + this.emulatorWriteScheduled = false; + const waiters = this.emulatorFlushWaiters; + this.emulatorFlushWaiters = []; + for (const resolve of waiters) resolve(); - // Dispose emulator this.emulator.dispose(); - - // Clear clients this.attachedClients.clear(); + this.clientSocketsWaitingForDrain.clear(); + this.subprocessStdoutPaused = false; } /** @@ -311,11 +665,11 @@ export class Session { // =========================================================================== /** - * Broadcast an event to all attached clients + * Broadcast an event to all attached clients with backpressure awareness. */ private broadcastEvent( eventType: string, - payload: TerminalDataEvent | TerminalExitEvent, + payload: TerminalDataEvent | TerminalExitEvent | TerminalErrorEvent, ): void { const event: IpcEvent = { type: "event", @@ -328,14 +682,49 @@ export class Session { for (const { socket } of this.attachedClients.values()) { try { - socket.write(message); + const canWrite = socket.write(message); + if (!canWrite) { + // Socket buffer full - data will be queued but may cause memory pressure + // In production, could track this and pause PTY output temporarily + console.warn( + `[Session ${this.sessionId}] Client socket buffer full, output may be delayed`, + ); + this.handleClientBackpressure(socket); + } } catch { - // Client might have disconnected this.attachedClients.delete(socket); + this.clientSocketsWaitingForDrain.delete(socket); } } } + private handleClientBackpressure(socket: Socket): void { + // If the client can’t keep up, pause reading from the subprocess stdout. + // This will backpressure the subprocess stdout pipe, which in turn pauses + // PTY reads inside the subprocess (preventing runaway buffering/CPU). + if (!this.subprocessStdoutPaused && this.subprocess?.stdout) { + this.subprocessStdoutPaused = true; + this.subprocess.stdout.pause(); + } + + if (this.clientSocketsWaitingForDrain.has(socket)) return; + this.clientSocketsWaitingForDrain.add(socket); + + socket.once("drain", () => { + this.clientSocketsWaitingForDrain.delete(socket); + this.maybeResumeSubprocessStdout(); + }); + } + + private maybeResumeSubprocessStdout(): void { + if (this.clientSocketsWaitingForDrain.size > 0) return; + if (!this.subprocessStdoutPaused) return; + if (!this.subprocess?.stdout) return; + + this.subprocessStdoutPaused = false; + this.subprocess.stdout.resume(); + } + /** * Get default shell for the platform */ @@ -352,9 +741,8 @@ export class Session { private getShellArgs(shell: string): string[] { const shellName = shell.split("/").pop() || ""; - // Common shells that support login shell if (["zsh", "bash", "sh", "ksh", "fish"].includes(shellName)) { - return ["-l"]; // Login shell + return ["-l"]; } return []; diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index a14bc163fd3..17e68242d4b 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -1,6 +1,7 @@ import type { FitAddon } from "@xterm/addon-fit"; import type { SearchAddon } from "@xterm/addon-search"; import type { IDisposable, Terminal as XTerm } from "@xterm/xterm"; +import { toast } from "@superset/ui/sonner"; import "@xterm/xterm/css/xterm.css"; import debounce from "lodash/debounce"; import { useCallback, useEffect, useRef, useState } from "react"; @@ -28,6 +29,11 @@ import { shellEscapePaths } from "./utils"; const FIRST_RENDER_RESTORE_FALLBACK_MS = 250; +// Module-level map to track pending detach timeouts. +// This survives React StrictMode's unmount/remount cycle, allowing us to +// cancel a pending detach if the component immediately remounts. +const pendingDetaches = new Map(); + type CreateOrAttachResult = { wasRecovered: boolean; isNew: boolean; @@ -87,6 +93,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Track alternate screen mode ourselves (xterm.buffer.active.type is unreliable after HMR/recovery) // Updated from: snapshot.modes.alternateScreen on restore, escape sequences in stream const isAlternateScreenRef = useRef(false); + // Track bracketed paste mode so large pastes can preserve a single bracketed-paste envelope. + const isBracketedPasteRef = useRef(false); + // Track mode toggles across chunk boundaries (escape sequences can span stream frames). + const modeScanBufferRef = useRef(""); // Refs avoid effect re-runs when these values change const isFocusedRef = useRef(isFocused); @@ -102,6 +112,11 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const { data: workspaceCwd } = trpc.terminal.getWorkspaceCwd.useQuery(workspaceId); + // Use ref for workspaceCwd to avoid terminal recreation when query loads + // (changing from undefined→string triggers useEffect, causing xterm errors) + const workspaceCwdRef = useRef(workspaceCwd); + workspaceCwdRef.current = workspaceCwd; + // Query terminal link behavior setting const { data: terminalLinkBehavior } = trpc.settings.getTerminalLinkBehavior.useQuery(); @@ -221,6 +236,36 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }, 100), ); + const updateModesFromData = useCallback((data: string) => { + // Escape sequences can be split across streamed frames, so scan using a small carry buffer. + const combined = modeScanBufferRef.current + data; + + const enterAltIndex = Math.max( + combined.lastIndexOf("\x1b[?1049h"), + combined.lastIndexOf("\x1b[?47h"), + ); + const exitAltIndex = Math.max( + combined.lastIndexOf("\x1b[?1049l"), + combined.lastIndexOf("\x1b[?47l"), + ); + if (enterAltIndex !== -1 || exitAltIndex !== -1) { + isAlternateScreenRef.current = enterAltIndex > exitAltIndex; + } + + const enableBracketedIndex = combined.lastIndexOf("\x1b[?2004h"); + const disableBracketedIndex = combined.lastIndexOf("\x1b[?2004l"); + if (enableBracketedIndex !== -1 || disableBracketedIndex !== -1) { + isBracketedPasteRef.current = + enableBracketedIndex > disableBracketedIndex; + } + + // Keep a small tail in case the next chunk starts mid-sequence. + modeScanBufferRef.current = combined.slice(-32); + }, []); + + const updateModesFromDataRef = useRef(updateModesFromData); + updateModesFromDataRef.current = updateModesFromData; + const flushPendingEvents = useCallback(() => { const xterm = xtermRef.current; if (!xterm) return; @@ -233,20 +278,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { for (const event of events) { if (event.type === "data") { - // Track alternate screen mode from queued events too - // (escape sequences sent before stream was ready) - if ( - event.data.includes("\x1b[?1049h") || - event.data.includes("\x1b[?47h") - ) { - isAlternateScreenRef.current = true; - } - if ( - event.data.includes("\x1b[?1049l") || - event.data.includes("\x1b[?47l") - ) { - isAlternateScreenRef.current = false; - } + updateModesFromDataRef.current(event.data); xterm.write(event.data); updateCwdRef.current(event.data); } else if (event.type === "exit") { @@ -264,8 +296,16 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { : event.error; console.warn("[Terminal] stream error:", message); - // Don't block interaction for non-fatal issues like a paste drop. - if (event.code === "WRITE_QUEUE_FULL") { + toast.error("Terminal error", { + description: message, + }); + + // Don't block interaction for non-fatal issues like a paste drop or a + // transient write failure (we keep the session alive). + if ( + event.code === "WRITE_QUEUE_FULL" || + event.code === "WRITE_FAILED" + ) { xterm.writeln(`\r\n[Terminal] ${message}`); } else { setConnectionError(message); @@ -291,6 +331,8 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Track alternate screen mode from snapshot for our own reference // (xterm.buffer.active.type is unreliable after HMR/recovery) isAlternateScreenRef.current = !!result.snapshot?.modes.alternateScreen; + isBracketedPasteRef.current = !!result.snapshot?.modes.bracketedPaste; + modeScanBufferRef.current = ""; // Also parse scrollback for escape sequences in case snapshot.modes is incomplete // This handles cases where the daemon didn't track the mode but the sequences are in history @@ -305,6 +347,15 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (hasEnterAlt && !hasExitAlt) { isAlternateScreenRef.current = true; } + + // Bracketed paste mode can toggle during a session - use the last seen state. + const bracketEnableIndex = result.scrollback.lastIndexOf("\x1b[?2004h"); + const bracketDisableIndex = + result.scrollback.lastIndexOf("\x1b[?2004l"); + if (bracketEnableIndex !== -1 || bracketDisableIndex !== -1) { + isBracketedPasteRef.current = + bracketEnableIndex > bracketDisableIndex; + } } // If session was in alternate screen mode, enter it BEFORE writing content. @@ -425,20 +476,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } if (event.type === "data") { - // Track alternate screen mode changes from escape sequences - // Check for both modern (1049) and legacy (47) alternate screen sequences - if ( - event.data.includes("\x1b[?1049h") || - event.data.includes("\x1b[?47h") - ) { - isAlternateScreenRef.current = true; - } - if ( - event.data.includes("\x1b[?1049l") || - event.data.includes("\x1b[?47l") - ) { - isAlternateScreenRef.current = false; - } + updateModesFromDataRef.current(event.data); xtermRef.current.write(event.data); updateCwdFromData(event.data); } else if (event.type === "exit") { @@ -457,7 +495,11 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { : event.error; console.warn("[Terminal] stream error:", message); - if (event.code === "WRITE_QUEUE_FULL") { + toast.error("Terminal error", { + description: message, + }); + + if (event.code === "WRITE_QUEUE_FULL" || event.code === "WRITE_FAILED") { xtermRef.current.writeln(`\r\n[Terminal] ${message}`); } else { setConnectionError(message); @@ -503,6 +545,15 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const container = terminalRef.current; if (!container) return; + // Cancel any pending detach from a previous unmount (e.g., React StrictMode's + // simulated unmount/remount cycle). This prevents the detach from corrupting + // the terminal state when we're immediately remounting. + const pendingDetach = pendingDetaches.get(paneId); + if (pendingDetach) { + clearTimeout(pendingDetach); + pendingDetaches.delete(paneId); + } + let isUnmounted = false; const { @@ -511,7 +562,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { renderer, cleanup: cleanupQuerySuppression, } = createTerminalInstance(container, { - cwd: workspaceCwd, + cwd: workspaceCwdRef.current, initialTheme: initialThemeRef.current, onFileLinkClick: (path, line, column) => handleFileLinkClickRef.current(path, line, column), @@ -564,6 +615,8 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { isExitedRef.current = false; isStreamReadyRef.current = false; isAlternateScreenRef.current = false; // Reset for new shell + isBracketedPasteRef.current = false; + modeScanBufferRef.current = ""; xterm.clear(); createOrAttachRef.current( { @@ -708,6 +761,8 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { onPaste: (text) => { commandBufferRef.current += text; }, + onWrite: handleWrite, + isBracketedPasteEnabled: () => isBracketedPasteRef.current, }); return () => { @@ -726,26 +781,39 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { cleanupQuerySuppression(); unregisterClearCallbackRef.current(paneId); debouncedSetTabAutoTitleRef.current?.cancel?.(); - // Detach instead of kill to keep PTY running for reattachment - detachRef.current({ paneId }); + + // Debounce detach to handle React StrictMode's unmount/remount cycle. + // If the component remounts quickly (as in StrictMode), the new mount will + // cancel this timeout, preventing the detach from corrupting terminal state. + const detachTimeout = setTimeout(() => { + detachRef.current({ paneId }); + pendingDetaches.delete(paneId); + }, 50); + pendingDetaches.set(paneId, detachTimeout); + isStreamReadyRef.current = false; didFirstRenderRef.current = false; pendingInitialStateRef.current = null; isAlternateScreenRef.current = false; + isBracketedPasteRef.current = false; + modeScanBufferRef.current = ""; renderDisposableRef.current?.dispose(); renderDisposableRef.current = null; - xterm.dispose(); + + // Delay xterm.dispose() to let internal timeouts complete. + // xterm.open() schedules a setTimeout for Viewport.syncScrollArea. + // If we dispose synchronously, that timeout fires after _renderer is + // cleared, causing "Cannot read properties of undefined (reading 'dimensions')". + // Using setTimeout(0) ensures our dispose runs after xterm's internal callback. + setTimeout(() => { + xterm.dispose(); + }, 0); + xtermRef.current = null; searchAddonRef.current = null; rendererRef.current = null; }; - }, [ - paneId, - workspaceId, - workspaceCwd, - flushPendingEvents, - maybeApplyInitialState, - ]); + }, [paneId, workspaceId, flushPendingEvents, maybeApplyInitialState]); useEffect(() => { const xterm = xtermRef.current; diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts index c726f7f8cc3..c63b0b610b1 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts @@ -139,17 +139,35 @@ export function createTerminalInstance( const unicode11Addon = new Unicode11Addon(); const imageAddon = new ImageAddon(); + // Track cleanup state to prevent operations on disposed terminal + let isDisposed = false; + let renderer: { dispose: () => void } | null = null; + let rafId: number | null = null; + xterm.open(container); + // Load non-renderer addons synchronously - these are safe and needed immediately xterm.loadAddon(fitAddon); - const renderer = loadRenderer(xterm); - xterm.loadAddon(clipboardAddon); xterm.loadAddon(unicode11Addon); xterm.loadAddon(imageAddon); + // Defer GPU renderer loading to next animation frame. + // xterm.open() schedules a setTimeout for Viewport.syncScrollArea which expects + // the renderer to be ready. Loading WebGL/Canvas immediately after open() can + // cause a race condition where the setTimeout fires during addon initialization, + // when _renderer is temporarily undefined (old renderer disposed, new not yet set). + // Deferring to rAF ensures xterm's internal setTimeout completes first with the + // default DOM renderer, then we safely swap to WebGL/Canvas. + rafId = requestAnimationFrame(() => { + rafId = null; + if (isDisposed) return; + renderer = loadRenderer(xterm); + }); + import("@xterm/addon-ligatures") .then(({ LigaturesAddon }) => { + if (isDisposed) return; try { xterm.loadAddon(new LigaturesAddon()); } catch { @@ -201,8 +219,12 @@ export function createTerminalInstance( fitAddon, renderer, cleanup: () => { + isDisposed = true; + if (rafId !== null) { + cancelAnimationFrame(rafId); + } cleanupQuerySuppression(); - renderer.dispose(); + renderer?.dispose(); }, }; } @@ -217,6 +239,10 @@ export interface KeyboardHandlerOptions { export interface PasteHandlerOptions { /** Callback when text is pasted, receives the pasted text */ onPaste?: (text: string) => void; + /** Optional direct write callback to bypass xterm's paste burst */ + onWrite?: (data: string) => void; + /** Whether bracketed paste mode is enabled for the current terminal */ + isBracketedPasteEnabled?: () => boolean; } /** @@ -240,6 +266,8 @@ export function setupPasteHandler( const textarea = xterm.textarea; if (!textarea) return () => {}; + let cancelActivePaste: (() => void) | null = null; + const handlePaste = (event: ClipboardEvent) => { const text = event.clipboardData?.getData("text/plain"); if (!text) return; @@ -248,12 +276,100 @@ export function setupPasteHandler( event.stopImmediatePropagation(); options.onPaste?.(text); - xterm.paste(text); + + // Cancel any in-flight chunked paste to avoid overlapping writes. + cancelActivePaste?.(); + cancelActivePaste = null; + + // Chunk large pastes to avoid sending a single massive input burst that can + // overwhelm the PTY pipeline (especially when the app is repainting heavily). + const MAX_SYNC_PASTE_CHARS = 16_384; + + // If no direct write callback is provided, fall back to xterm's paste() + // (it handles newline normalization and bracketed paste mode internally). + if (!options.onWrite) { + const CHUNK_CHARS = 4096; + const CHUNK_DELAY_MS = 5; + + if (text.length <= MAX_SYNC_PASTE_CHARS) { + xterm.paste(text); + return; + } + + let cancelled = false; + let offset = 0; + + const pasteNext = () => { + if (cancelled) return; + + const chunk = text.slice(offset, offset + CHUNK_CHARS); + offset += CHUNK_CHARS; + xterm.paste(chunk); + + if (offset < text.length) { + setTimeout(pasteNext, CHUNK_DELAY_MS); + } + }; + + cancelActivePaste = () => { + cancelled = true; + }; + + pasteNext(); + return; + } + + // Direct write path: replicate xterm's paste normalization, but stream in + // controlled chunks while preserving bracketed-paste semantics. + const preparedText = text.replace(/\r?\n/g, "\r"); + const bracketedPasteEnabled = options.isBracketedPasteEnabled?.() ?? false; + const shouldBracket = bracketedPasteEnabled; + + // For small/medium pastes, preserve the fast path and avoid timers. + if (preparedText.length <= MAX_SYNC_PASTE_CHARS) { + options.onWrite( + shouldBracket ? `\x1b[200~${preparedText}\x1b[201~` : preparedText, + ); + return; + } + + let cancelled = false; + let offset = 0; + const CHUNK_CHARS = 16_384; + const CHUNK_DELAY_MS = 0; + + const pasteNext = () => { + if (cancelled) return; + + const chunk = preparedText.slice(offset, offset + CHUNK_CHARS); + offset += CHUNK_CHARS; + + if (shouldBracket) { + // Wrap each chunk to avoid long-running "open" bracketed paste blocks, + // which some TUIs may defer repainting until the closing sequence arrives. + options.onWrite?.(`\x1b[200~${chunk}\x1b[201~`); + } else { + options.onWrite?.(chunk); + } + + if (offset < preparedText.length) { + setTimeout(pasteNext, CHUNK_DELAY_MS); + return; + } + }; + + cancelActivePaste = () => { + cancelled = true; + }; + + pasteNext(); }; textarea.addEventListener("paste", handlePaste, { capture: true }); return () => { + cancelActivePaste?.(); + cancelActivePaste = null; textarea.removeEventListener("paste", handlePaste, { capture: true }); }; } From 3bf547719a4875ad256f76cd817ec459bcd35843 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 13:19:52 +0200 Subject: [PATCH 32/51] fix(desktop): force terminal redraw on tab switch - Track async GPU renderer via ref to reliably clear WebGL atlas - Schedule fit+refresh on focus/resize to avoid partial renders when switching panes --- .../TabsContent/Terminal/Terminal.tsx | 65 +++++++++++++++++-- .../TabsContent/Terminal/helpers.ts | 27 ++++++-- 2 files changed, 83 insertions(+), 9 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 17e68242d4b..36554d42614 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -20,7 +20,7 @@ import { setupKeyboardHandler, setupPasteHandler, setupResizeHandlers, - type TerminalRenderer, + type TerminalRendererRef, } from "./helpers"; import { parseCwd } from "./parseCwd"; import { TerminalSearch } from "./TerminalSearch"; @@ -61,7 +61,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const xtermRef = useRef(null); const fitAddonRef = useRef(null); const searchAddonRef = useRef(null); - const rendererRef = useRef(null); + const rendererRef = useRef(null); const isExitedRef = useRef(false); const pendingEventsRef = useRef([]); const commandBufferRef = useRef(""); @@ -102,6 +102,49 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const isFocusedRef = useRef(isFocused); isFocusedRef.current = isFocused; + // Some GPU renderers (notably xterm-webgl) can fail to repaint correctly after + // pane/tab switching until a resize happens. Schedule a redraw on focus. + const redrawRafRef = useRef(null); + const scheduleRedraw = useCallback(() => { + if (redrawRafRef.current !== null) return; + + redrawRafRef.current = requestAnimationFrame(() => { + redrawRafRef.current = null; + + const xterm = xtermRef.current; + const fitAddon = fitAddonRef.current; + if (!xterm || !fitAddon) return; + + try { + fitAddon.fit(); + } catch { + // Ignore fit errors + } + + const cols = xterm.cols; + const rows = xterm.rows; + if (cols <= 0 || rows <= 0) return; + + // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. + resizeRef.current({ paneId, cols, rows }); + + const renderer = rendererRef.current?.current; + if (renderer?.kind === "webgl") { + renderer.clearTextureAtlas?.(); + } + xterm.refresh(0, rows - 1); + }); + }, [paneId]); + + useEffect(() => { + return () => { + if (redrawRafRef.current !== null) { + cancelAnimationFrame(redrawRafRef.current); + redrawRafRef.current = null; + } + }; + }, []); + const paneInitialCommandsRef = useRef(paneInitialCommands); const paneInitialCwdRef = useRef(paneInitialCwd); const clearPaneInitialDataRef = useRef(clearPaneInitialData); @@ -398,7 +441,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { resizeRef.current({ paneId, cols, rows }); if (!result.isNew) { - const renderer = rendererRef.current; + const renderer = rendererRef.current?.current; if (renderer?.kind === "webgl") { // Clear twice: once immediately, and once after fonts settle. // This reduces restore artifacts (especially for TUIs like opencode) @@ -529,8 +572,13 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { useEffect(() => { if (isFocused && xtermRef.current) { xtermRef.current.focus(); + scheduleRedraw(); + void document.fonts?.ready.then(() => { + if (!isFocusedRef.current) return; + scheduleRedraw(); + }); } - }, [isFocused]); + }, [isFocused, scheduleRedraw]); useAppHotkey( "FIND_IN_TERMINAL", @@ -755,6 +803,15 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { fitAddon, (cols, rows) => { resizeRef.current({ paneId, cols, rows }); + // Repaint immediately after a resize; without this, WebGL terminals can + // remain partially drawn until the next user interaction. + if (rows > 0) { + const renderer = rendererRef.current?.current; + if (renderer?.kind === "webgl") { + renderer.clearTextureAtlas?.(); + } + xterm.refresh(0, rows - 1); + } }, ); const cleanupPaste = setupPasteHandler(xterm, { diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts index c63b0b610b1..b93770df30e 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts @@ -118,13 +118,21 @@ export interface CreateTerminalOptions { onFileLinkClick?: (path: string, line?: number, column?: number) => void; } +/** + * Mutable reference to the terminal renderer. + * Used because the GPU renderer is loaded asynchronously after the terminal is created. + */ +export interface TerminalRendererRef { + current: TerminalRenderer; +} + export function createTerminalInstance( container: HTMLDivElement, options: CreateTerminalOptions = {}, ): { xterm: XTerm; fitAddon: FitAddon; - renderer: TerminalRenderer; + renderer: TerminalRendererRef; cleanup: () => void; } { const { cwd, initialTheme, onFileLinkClick } = options; @@ -141,9 +149,18 @@ export function createTerminalInstance( // Track cleanup state to prevent operations on disposed terminal let isDisposed = false; - let renderer: { dispose: () => void } | null = null; let rafId: number | null = null; + // Use a ref pattern so the renderer can be updated after rAF. + // Start with a no-op DOM renderer - the actual GPU renderer is loaded async. + const rendererRef: TerminalRendererRef = { + current: { + kind: "dom", + dispose: () => {}, + clearTextureAtlas: undefined, + }, + }; + xterm.open(container); // Load non-renderer addons synchronously - these are safe and needed immediately @@ -162,7 +179,7 @@ export function createTerminalInstance( rafId = requestAnimationFrame(() => { rafId = null; if (isDisposed) return; - renderer = loadRenderer(xterm); + rendererRef.current = loadRenderer(xterm); }); import("@xterm/addon-ligatures") @@ -217,14 +234,14 @@ export function createTerminalInstance( return { xterm, fitAddon, - renderer, + renderer: rendererRef, cleanup: () => { isDisposed = true; if (rafId !== null) { cancelAnimationFrame(rafId); } cleanupQuerySuppression(); - renderer?.dispose(); + rendererRef.current.dispose(); }, }; } From 8c29c0e284148ee0ce5165b6b03d80974ff8b121 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 13:37:15 +0200 Subject: [PATCH 33/51] fix(desktop): reduce terminal redraw side effects Avoid fit/PTY resizes and WebGL atlas clears on focus; do a lightweight refresh instead. --- .../TabsContent/Terminal/Terminal.tsx | 27 ++----------------- 1 file changed, 2 insertions(+), 25 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 36554d42614..d3a3aa78ab9 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -103,7 +103,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { isFocusedRef.current = isFocused; // Some GPU renderers (notably xterm-webgl) can fail to repaint correctly after - // pane/tab switching until a resize happens. Schedule a redraw on focus. + // pane/tab switching until a resize happens. Schedule a lightweight redraw on focus. const redrawRafRef = useRef(null); const scheduleRedraw = useCallback(() => { if (redrawRafRef.current !== null) return; @@ -112,26 +112,12 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { redrawRafRef.current = null; const xterm = xtermRef.current; - const fitAddon = fitAddonRef.current; - if (!xterm || !fitAddon) return; - - try { - fitAddon.fit(); - } catch { - // Ignore fit errors - } + if (!xterm) return; const cols = xterm.cols; const rows = xterm.rows; if (cols <= 0 || rows <= 0) return; - // Keep PTY dimensions in sync even when FitAddon doesn't change cols/rows. - resizeRef.current({ paneId, cols, rows }); - - const renderer = rendererRef.current?.current; - if (renderer?.kind === "webgl") { - renderer.clearTextureAtlas?.(); - } xterm.refresh(0, rows - 1); }); }, [paneId]); @@ -803,15 +789,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { fitAddon, (cols, rows) => { resizeRef.current({ paneId, cols, rows }); - // Repaint immediately after a resize; without this, WebGL terminals can - // remain partially drawn until the next user interaction. - if (rows > 0) { - const renderer = rendererRef.current?.current; - if (renderer?.kind === "webgl") { - renderer.clearTextureAtlas?.(); - } - xterm.refresh(0, rows - 1); - } }, ); const cleanupPaste = setupPasteHandler(xterm, { From f849373c0366cbc4244cbc3e5bed1f08e60f4ca8 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 13:39:05 +0200 Subject: [PATCH 34/51] fix(desktop): address terminal persistence PR feedback - Remove duplicate terminalError handler in daemon-manager.ts (was causing duplicate event emissions) - Fix failing write test in manager.test.ts (add async wait for PtyWriteQueue flush before assertion) - Fix attach() hang with continuous output in session.ts (add 500ms timeout to flushEmulatorWrites to prevent indefinite hang when processes like tail -f produce continuous output) - Apply biome formatting fixes --- .../src/main/lib/terminal-host/client.ts | 8 ++-- .../src/main/lib/terminal/daemon-manager.ts | 9 ----- .../src/main/lib/terminal/manager.test.ts | 3 ++ apps/desktop/src/main/terminal-host/index.ts | 6 ++- .../main/terminal-host/pty-subprocess-ipc.ts | 4 +- .../src/main/terminal-host/pty-subprocess.ts | 14 ++++--- .../desktop/src/main/terminal-host/session.ts | 37 +++++++++++++++---- .../TabsContent/Terminal/Terminal.tsx | 4 +- 8 files changed, 52 insertions(+), 33 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 25e9491d9f1..51fa67a6f45 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -79,8 +79,6 @@ const SPAWN_LOCK_TIMEOUT_MS = 10000; // Max time to hold spawn lock // ============================================================================= class NdjsonParser { - // Use array buffering to avoid O(n²) string concatenation on high-volume streams - private chunks: string[] = []; private remainder = ""; parse(chunk: string): Array { @@ -154,7 +152,6 @@ export class TerminalHostClient extends EventEmitter { private connectionState = ConnectionState.DISCONNECTED; private disposed = false; private notifyQueue: string[] = []; - private notifyQueueBytes = 0; private notifyDrainArmed = false; // =========================================================================== @@ -720,7 +717,10 @@ export class TerminalHostClient extends EventEmitter { this.sendNotification("write", request); }) .catch((error) => { - this.emit("error", error instanceof Error ? error : new Error(String(error))); + this.emit( + "error", + error instanceof Error ? error : new Error(String(error)), + ); }); } diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 4fbaea5b8e0..b32eeff4213 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -97,15 +97,6 @@ export class DaemonTerminalManager extends EventEmitter { }, ); - // Forward terminal-specific error events (e.g., write queue full) - this.client.on( - "terminalError", - (sessionId: string, error: string, code?: string) => { - const paneId = sessionId; - this.emit(`error:${paneId}`, { error, code }); - }, - ); - // Handle client disconnection - notify all active sessions this.client.on("disconnected", () => { console.warn("[DaemonTerminalManager] Disconnected from daemon"); diff --git a/apps/desktop/src/main/lib/terminal/manager.test.ts b/apps/desktop/src/main/lib/terminal/manager.test.ts index f6d2c9d6146..87fd7767168 100644 --- a/apps/desktop/src/main/lib/terminal/manager.test.ts +++ b/apps/desktop/src/main/lib/terminal/manager.test.ts @@ -165,6 +165,9 @@ describe("TerminalManager", () => { data: "ls -la\n", }); + // Wait for PtyWriteQueue async flush (uses setTimeout internally) + await new Promise((resolve) => setTimeout(resolve, 20)); + expect(mockPty.write).toHaveBeenCalledWith("ls -la\n"); }); diff --git a/apps/desktop/src/main/terminal-host/index.ts b/apps/desktop/src/main/terminal-host/index.ts index 9353f240011..f4a92d144f0 100644 --- a/apps/desktop/src/main/terminal-host/index.ts +++ b/apps/desktop/src/main/terminal-host/index.ts @@ -30,8 +30,8 @@ import { type DetachRequest, type HelloRequest, type HelloResponse, - type IpcEvent, type IpcErrorResponse, + type IpcEvent, type IpcRequest, type IpcSuccessResponse, type KillAllRequest, @@ -273,7 +273,9 @@ const handlers: Record = { } satisfies TerminalErrorEvent, }; socket.write(`${JSON.stringify(event)}\n`); - log("warn", `Write failed for ${request.sessionId}`, { error: message }); + log("warn", `Write failed for ${request.sessionId}`, { + error: message, + }); return; } diff --git a/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts b/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts index 28d35c156a1..c4eb0780d1e 100644 --- a/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts +++ b/apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts @@ -90,7 +90,8 @@ export class PtySubprocessFrameDecoder { } this.frameType = type; - this.payload = payloadLength > 0 ? Buffer.allocUnsafe(payloadLength) : null; + this.payload = + payloadLength > 0 ? Buffer.allocUnsafe(payloadLength) : null; this.payloadOffset = 0; this.headerOffset = 0; @@ -125,4 +126,3 @@ export class PtySubprocessFrameDecoder { return frames; } } - diff --git a/apps/desktop/src/main/terminal-host/pty-subprocess.ts b/apps/desktop/src/main/terminal-host/pty-subprocess.ts index 01cf0472685..fc7bf5db4a6 100644 --- a/apps/desktop/src/main/terminal-host/pty-subprocess.ts +++ b/apps/desktop/src/main/terminal-host/pty-subprocess.ts @@ -8,9 +8,9 @@ * to avoid JSON escaping overhead on escape-sequence-heavy PTY output. */ -import * as pty from "node-pty"; -import type { IPty } from "node-pty"; import { write as fsWrite } from "node:fs"; +import type { IPty } from "node-pty"; +import * as pty from "node-pty"; import { PtySubprocessFrameDecoder, PtySubprocessIpcType, @@ -63,8 +63,7 @@ const MAX_OUTPUT_BATCH_SIZE_BYTES = 128 * 1024; // 128KB max per flush let stdoutDraining = true; let ptyPaused = false; -const DEBUG_OUTPUT_BATCHING = - process.env.SUPERSET_PTY_SUBPROCESS_DEBUG === "1"; +const DEBUG_OUTPUT_BATCHING = process.env.SUPERSET_PTY_SUBPROCESS_DEBUG === "1"; // ============================================================================= // Helpers @@ -188,7 +187,10 @@ function flush(): void { writeBackoffMs === 0 ? MIN_WRITE_BACKOFF_MS : Math.min(writeBackoffMs * 2, MAX_WRITE_BACKOFF_MS); - if (DEBUG_OUTPUT_BATCHING && writeBackoffMs === MIN_WRITE_BACKOFF_MS) { + if ( + DEBUG_OUTPUT_BATCHING && + writeBackoffMs === MIN_WRITE_BACKOFF_MS + ) { console.error("[pty-subprocess] PTY input backpressured (EAGAIN)"); } setTimeout(flush, writeBackoffMs); @@ -227,7 +229,7 @@ function flush(): void { // Fallback: node-pty's write() is synchronous and can block. // This path should rarely be used on macOS, but keep it for safety. - let chunk = writeQueue.shift(); + const chunk = writeQueue.shift(); if (!chunk) { flushing = false; return; diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index f4d52e258f9..e8be10ebdad 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -8,9 +8,9 @@ * - Output capture to disk */ -import * as path from "node:path"; +import { type ChildProcess, spawn } from "node:child_process"; import type { Socket } from "node:net"; -import { spawn, type ChildProcess } from "node:child_process"; +import * as path from "node:path"; import { HeadlessEmulator } from "../lib/terminal-host/headless-emulator"; import type { CreateOrAttachRequest, @@ -22,11 +22,21 @@ import type { TerminalSnapshot, } from "../lib/terminal-host/types"; import { + createFrameHeader, PtySubprocessFrameDecoder, PtySubprocessIpcType, - createFrameHeader, } from "./pty-subprocess-ipc"; +// ============================================================================= +// Constants +// ============================================================================= + +/** + * Timeout for flushing emulator writes during attach. + * Prevents indefinite hang when continuous output (e.g., tail -f) keeps the queue non-empty. + */ +const ATTACH_FLUSH_TIMEOUT_MS = 500; + // ============================================================================= // Types // ============================================================================= @@ -76,7 +86,6 @@ export class Session { private disposed = false; private subprocessDecoder: PtySubprocessFrameDecoder | null = null; private subprocessStdinQueue: Buffer[] = []; - private subprocessStdinQueuedBytes = 0; private subprocessStdinDrainArmed = false; private emulatorWriteQueue: string[] = []; @@ -465,7 +474,8 @@ export class Session { // Keep the daemon responsive while still ensuring the emulator catches up eventually. const baseBudgetMs = hasClients ? 5 : 25; - const budgetMs = backlogBytes > 1024 * 1024 ? Math.max(baseBudgetMs, 25) : baseBudgetMs; + const budgetMs = + backlogBytes > 1024 * 1024 ? Math.max(baseBudgetMs, 25) : baseBudgetMs; const MAX_CHUNK_CHARS = 8192; while (this.emulatorWriteQueue.length > 0) { @@ -495,15 +505,25 @@ export class Session { for (const resolve of waiters) resolve(); } - private async flushEmulatorWrites(): Promise { + private async flushEmulatorWrites(timeoutMs?: number): Promise { if (this.emulatorWriteQueue.length === 0 && !this.emulatorWriteScheduled) { return; } - await new Promise((resolve) => { + const flushPromise = new Promise((resolve) => { this.emulatorFlushWaiters.push(resolve); this.scheduleEmulatorWrite(); }); + + if (timeoutMs !== undefined) { + // Race against timeout to prevent indefinite hang with continuous output + await Promise.race([ + flushPromise, + new Promise((resolve) => setTimeout(resolve, timeoutMs)), + ]); + } else { + await flushPromise; + } } /** @@ -534,7 +554,8 @@ export class Session { }); this.lastAttachedAt = new Date(); - await this.flushEmulatorWrites(); + // Use timeout to prevent indefinite hang with continuous output (e.g., tail -f) + await this.flushEmulatorWrites(ATTACH_FLUSH_TIMEOUT_MS); return this.emulator.getSnapshotAsync(); } diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index d3a3aa78ab9..c19b85d3f4a 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -1,7 +1,7 @@ +import { toast } from "@superset/ui/sonner"; import type { FitAddon } from "@xterm/addon-fit"; import type { SearchAddon } from "@xterm/addon-search"; import type { IDisposable, Terminal as XTerm } from "@xterm/xterm"; -import { toast } from "@superset/ui/sonner"; import "@xterm/xterm/css/xterm.css"; import debounce from "lodash/debounce"; import { useCallback, useEffect, useRef, useState } from "react"; @@ -120,7 +120,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { xterm.refresh(0, rows - 1); }); - }, [paneId]); + }, []); useEffect(() => { return () => { From 77e1e34cf39963e15928ad8aa2c2ab056b9f0215 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 13:42:52 +0200 Subject: [PATCH 35/51] fix(desktop): restore missing queue byte counters --- apps/desktop/src/main/lib/terminal-host/client.ts | 1 + apps/desktop/src/main/terminal-host/session.ts | 1 + 2 files changed, 2 insertions(+) diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 51fa67a6f45..a04896a9f83 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -152,6 +152,7 @@ export class TerminalHostClient extends EventEmitter { private connectionState = ConnectionState.DISCONNECTED; private disposed = false; private notifyQueue: string[] = []; + private notifyQueueBytes = 0; private notifyDrainArmed = false; // =========================================================================== diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index e8be10ebdad..ca6252196c1 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -86,6 +86,7 @@ export class Session { private disposed = false; private subprocessDecoder: PtySubprocessFrameDecoder | null = null; private subprocessStdinQueue: Buffer[] = []; + private subprocessStdinQueuedBytes = 0; private subprocessStdinDrainArmed = false; private emulatorWriteQueue: string[] = []; From 0400c86486d20ea24d7d100014eefa78c3f8276b Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 13:43:02 +0200 Subject: [PATCH 36/51] fix(desktop): avoid terminal refresh while hidden Retry focus redraw until container has non-zero size to avoid WebGL glitches on tab switches. --- .../TabsContent/Terminal/Terminal.tsx | 39 ++++++++++++++----- 1 file changed, 30 insertions(+), 9 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index c19b85d3f4a..1930a0c4d77 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -108,18 +108,39 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const scheduleRedraw = useCallback(() => { if (redrawRafRef.current !== null) return; - redrawRafRef.current = requestAnimationFrame(() => { - redrawRafRef.current = null; + let attempt = 0; + const MAX_REDRAW_ATTEMPTS = 5; - const xterm = xtermRef.current; - if (!xterm) return; + const tick = () => { + redrawRafRef.current = requestAnimationFrame(() => { + redrawRafRef.current = null; - const cols = xterm.cols; - const rows = xterm.rows; - if (cols <= 0 || rows <= 0) return; + const xterm = xtermRef.current; + if (!xterm) return; - xterm.refresh(0, rows - 1); - }); + // Avoid refreshing while the terminal is still hidden/laying out (e.g. tab switch), + // as WebGL renderers can glitch when asked to render into a 0×0 container. + const container = terminalRef.current; + const rect = container?.getBoundingClientRect(); + if ( + rect && + (rect.width < 10 || rect.height < 10) && + attempt < MAX_REDRAW_ATTEMPTS + ) { + attempt += 1; + tick(); + return; + } + + const cols = xterm.cols; + const rows = xterm.rows; + if (cols <= 0 || rows <= 0) return; + + xterm.refresh(0, rows - 1); + }); + }; + + tick(); }, []); useEffect(() => { From bd94347f0cead617bb894bb16b36f576d5942372 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 14:06:47 +0200 Subject: [PATCH 37/51] fix(desktop): stabilize terminal rendering on macOS - Default xterm renderer to Canvas on macOS to avoid WebGL corruption on tab switches - Remove focus redraw hacks that were amplifying WebGL glitches --- .../TabsContent/Terminal/Terminal.tsx | 57 +------------------ .../TabsContent/Terminal/helpers.ts | 32 +++++++++++ 2 files changed, 33 insertions(+), 56 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 1930a0c4d77..5a7cd31d64b 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -102,56 +102,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const isFocusedRef = useRef(isFocused); isFocusedRef.current = isFocused; - // Some GPU renderers (notably xterm-webgl) can fail to repaint correctly after - // pane/tab switching until a resize happens. Schedule a lightweight redraw on focus. - const redrawRafRef = useRef(null); - const scheduleRedraw = useCallback(() => { - if (redrawRafRef.current !== null) return; - - let attempt = 0; - const MAX_REDRAW_ATTEMPTS = 5; - - const tick = () => { - redrawRafRef.current = requestAnimationFrame(() => { - redrawRafRef.current = null; - - const xterm = xtermRef.current; - if (!xterm) return; - - // Avoid refreshing while the terminal is still hidden/laying out (e.g. tab switch), - // as WebGL renderers can glitch when asked to render into a 0×0 container. - const container = terminalRef.current; - const rect = container?.getBoundingClientRect(); - if ( - rect && - (rect.width < 10 || rect.height < 10) && - attempt < MAX_REDRAW_ATTEMPTS - ) { - attempt += 1; - tick(); - return; - } - - const cols = xterm.cols; - const rows = xterm.rows; - if (cols <= 0 || rows <= 0) return; - - xterm.refresh(0, rows - 1); - }); - }; - - tick(); - }, []); - - useEffect(() => { - return () => { - if (redrawRafRef.current !== null) { - cancelAnimationFrame(redrawRafRef.current); - redrawRafRef.current = null; - } - }; - }, []); - const paneInitialCommandsRef = useRef(paneInitialCommands); const paneInitialCwdRef = useRef(paneInitialCwd); const clearPaneInitialDataRef = useRef(clearPaneInitialData); @@ -579,13 +529,8 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { useEffect(() => { if (isFocused && xtermRef.current) { xtermRef.current.focus(); - scheduleRedraw(); - void document.fonts?.ready.then(() => { - if (!isFocusedRef.current) return; - scheduleRedraw(); - }); } - }, [isFocused, scheduleRedraw]); + }, [isFocused]); useAppHotkey( "FIND_IN_TERMINAL", diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts index b93770df30e..179fb5d16f7 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts @@ -66,11 +66,34 @@ export type TerminalRenderer = { clearTextureAtlas?: () => void; }; +type PreferredRenderer = TerminalRenderer["kind"] | "auto"; + +function getPreferredRenderer(): PreferredRenderer { + try { + const stored = localStorage.getItem("terminal-renderer"); + if (stored === "webgl" || stored === "canvas" || stored === "dom") { + return stored; + } + } catch { + // ignore + } + + // Default: avoid xterm-webgl on macOS. We've seen repeated corruption/glitching + // when terminals are hidden/shown or switched between panes. + return navigator.userAgent.includes("Macintosh") ? "canvas" : "webgl"; +} + function loadRenderer(xterm: XTerm): TerminalRenderer { let renderer: WebglAddon | CanvasAddon | null = null; let webglAddon: WebglAddon | null = null; let kind: TerminalRenderer["kind"] = "dom"; + const preferred = getPreferredRenderer(); + + if (preferred === "dom") { + return { kind: "dom", dispose: () => {}, clearTextureAtlas: undefined }; + } + const tryLoadCanvas = () => { try { renderer = new CanvasAddon(); @@ -81,6 +104,15 @@ function loadRenderer(xterm: XTerm): TerminalRenderer { } }; + if (preferred === "canvas") { + tryLoadCanvas(); + return { + kind, + dispose: () => renderer?.dispose(), + clearTextureAtlas: undefined, + }; + } + try { webglAddon = new WebglAddon(); From 75b3bd03411d85f183dd1f4524ad1ac50dbabead Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 14:53:53 +0200 Subject: [PATCH 38/51] fix(desktop): address P0/P1 terminal persistence PR feedback - Fix initialCommands race: use waitForReady() instead of setTimeout(100) - Add PTY ready promise in session to signal when subprocess spawned - Add queue limits for both subprocess stdin and client notify queues - Emit terminalError when writeNoAck drops input due to full queue - Complete detachAllListeners: add disconnect: and error: prefixes - Shutdown orphaned daemon when persistence disabled on app startup --- apps/desktop/src/main/index.ts | 6 ++- .../src/main/lib/terminal-host/client.ts | 31 ++++++++++-- .../src/main/lib/terminal/daemon-manager.ts | 7 ++- apps/desktop/src/main/lib/terminal/index.ts | 30 ++++++++++++ apps/desktop/src/main/lib/terminal/manager.ts | 7 ++- .../desktop/src/main/terminal-host/session.ts | 47 +++++++++++++++++++ .../src/main/terminal-host/terminal-host.ts | 22 ++++++--- 7 files changed, 136 insertions(+), 14 deletions(-) diff --git a/apps/desktop/src/main/index.ts b/apps/desktop/src/main/index.ts index 6afdda3832b..b485b5af0f2 100644 --- a/apps/desktop/src/main/index.ts +++ b/apps/desktop/src/main/index.ts @@ -13,7 +13,7 @@ import { initAppState } from "./lib/app-state"; import { authService, handleAuthDeepLink, isAuthDeepLink } from "./lib/auth"; import { setupAutoUpdater } from "./lib/auto-updater"; import { localDb } from "./lib/local-db"; -import { terminalManager } from "./lib/terminal"; +import { shutdownOrphanedDaemon, terminalManager } from "./lib/terminal"; import { MainWindow } from "./windows/main"; // Initialize local SQLite database (runs migrations + legacy data migration on import) @@ -221,6 +221,10 @@ if (!gotTheLock) { await app.whenReady(); await initAppState(); + + // Cleanup any orphaned daemon if persistence is now disabled + await shutdownOrphanedDaemon(); + await authService.initialize(); try { diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index a04896a9f83..83490909734 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -74,6 +74,9 @@ const SPAWN_WAIT_MS = 2000; const REQUEST_TIMEOUT_MS = 30000; const SPAWN_LOCK_TIMEOUT_MS = 10000; // Max time to hold spawn lock +// Queue limits +const MAX_NOTIFY_QUEUE_BYTES = 2_000_000; // 2MB cap to prevent OOM + // ============================================================================= // NDJSON Parser // ============================================================================= @@ -641,18 +644,26 @@ export class TerminalHostClient extends EventEmitter { * Used for high-frequency messages like terminal input, where request/response * overhead can cause timeouts under load and drop data. The daemon may still * send a response for compatibility, but this client will ignore it. + * + * Returns false if queue is full (caller should handle). */ - private sendNotification(type: string, payload: unknown): void { - if (!this.socket) return; + private sendNotification(type: string, payload: unknown): boolean { + if (!this.socket) return false; const id = `notify_${++this.requestCounter}`; const message = `${JSON.stringify({ id, type, payload })}\n`; + const messageBytes = Buffer.byteLength(message, "utf8"); + + // Check queue limit to prevent OOM under backpressure + if (this.notifyQueueBytes + messageBytes > MAX_NOTIFY_QUEUE_BYTES) { + return false; + } // If we're already backpressured, just queue. if (this.notifyDrainArmed || this.notifyQueue.length > 0) { this.notifyQueue.push(message); - this.notifyQueueBytes += Buffer.byteLength(message, "utf8"); - return; + this.notifyQueueBytes += messageBytes; + return true; } const canWrite = this.socket.write(message); @@ -661,6 +672,7 @@ export class TerminalHostClient extends EventEmitter { // subsequent notifications we enqueue. this.notifyDrainArmed = true; } + return true; } private flushNotifyQueue(): void { @@ -715,7 +727,16 @@ export class TerminalHostClient extends EventEmitter { writeNoAck(request: WriteRequest): void { void this.ensureConnected() .then(() => { - this.sendNotification("write", request); + const sent = this.sendNotification("write", request); + if (!sent) { + // Queue full - notify the session so it can surface the error to the user + this.emit( + "terminalError", + request.sessionId, + "Write queue full - input dropped", + "QUEUE_FULL", + ); + } }) .catch((error) => { this.emit( diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index b32eeff4213..bcb22886359 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -458,7 +458,12 @@ export class DaemonTerminalManager extends EventEmitter { detachAllListeners(): void { for (const event of this.eventNames()) { const name = String(event); - if (name.startsWith("data:") || name.startsWith("exit:")) { + if ( + name.startsWith("data:") || + name.startsWith("exit:") || + name.startsWith("disconnect:") || + name.startsWith("error:") + ) { this.removeAllListeners(event); } } diff --git a/apps/desktop/src/main/lib/terminal/index.ts b/apps/desktop/src/main/lib/terminal/index.ts index 8d71a4fcc32..2b564a4a53f 100644 --- a/apps/desktop/src/main/lib/terminal/index.ts +++ b/apps/desktop/src/main/lib/terminal/index.ts @@ -1,5 +1,9 @@ import { settings } from "@superset/local-db"; import { localDb } from "main/lib/local-db"; +import { + disposeTerminalHostClient, + getTerminalHostClient, +} from "main/lib/terminal-host/client"; import { DaemonTerminalManager, getDaemonTerminalManager, @@ -75,3 +79,29 @@ export function getActiveTerminalManager(): } return terminalManager; } + +/** + * Shutdown any orphaned daemon process. + * Should be called on app startup when daemon mode is disabled to clean up + * any daemon left running from a previous session with persistence enabled. + */ +export async function shutdownOrphanedDaemon(): Promise { + if (isDaemonModeEnabled()) { + // Daemon mode is enabled, don't shutdown + return; + } + + try { + const client = getTerminalHostClient(); + // Try to connect and shutdown - if no daemon is running, this will fail + // which is fine (nothing to clean up) + await client.shutdown({ killSessions: true }); + console.log("[TerminalManager] Shutdown orphaned daemon successfully"); + } catch { + // No daemon running or failed to connect - this is expected + console.log("[TerminalManager] No orphaned daemon to shutdown"); + } finally { + // Always dispose the client to clean up any partial state + disposeTerminalHostClient(); + } +} diff --git a/apps/desktop/src/main/lib/terminal/manager.ts b/apps/desktop/src/main/lib/terminal/manager.ts index dc1aeb34563..e85096293ca 100644 --- a/apps/desktop/src/main/lib/terminal/manager.ts +++ b/apps/desktop/src/main/lib/terminal/manager.ts @@ -411,7 +411,12 @@ export class TerminalManager extends EventEmitter { detachAllListeners(): void { for (const event of this.eventNames()) { const name = String(event); - if (name.startsWith("data:") || name.startsWith("exit:")) { + if ( + name.startsWith("data:") || + name.startsWith("exit:") || + name.startsWith("disconnect:") || + name.startsWith("error:") + ) { this.removeAllListeners(event); } } diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index ca6252196c1..a3db6618843 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -37,6 +37,13 @@ import { */ const ATTACH_FLUSH_TIMEOUT_MS = 500; +/** + * Maximum bytes allowed in subprocess stdin queue. + * Prevents OOM if subprocess stdin is backpressured (e.g., slow PTY consumer). + * 2MB is generous - typical large paste is ~50KB. + */ +const MAX_SUBPROCESS_STDIN_QUEUE_BYTES = 2_000_000; + // ============================================================================= // Types // ============================================================================= @@ -89,6 +96,10 @@ export class Session { private subprocessStdinQueuedBytes = 0; private subprocessStdinDrainArmed = false; + // Promise that resolves when PTY is ready to accept writes + private ptyReadyPromise: Promise; + private ptyReadyResolve: (() => void) | null = null; + private emulatorWriteQueue: string[] = []; private emulatorWriteQueuedBytes = 0; private emulatorWriteScheduled = false; @@ -110,6 +121,11 @@ export class Session { this.createdAt = new Date(); this.lastAttachedAt = new Date(); + // Initialize PTY ready promise + this.ptyReadyPromise = new Promise((resolve) => { + this.ptyReadyResolve = resolve; + }); + // Create headless emulator this.emulator = new HeadlessEmulator({ cols: options.cols, @@ -251,6 +267,11 @@ export class Session { console.log( `[Session ${this.sessionId}] PTY spawned with pid ${this.ptyPid}`, ); + // Resolve the ready promise so callers can await PTY readiness + if (this.ptyReadyResolve) { + this.ptyReadyResolve(); + this.ptyReadyResolve = null; + } break; case PtySubprocessIpcType.Data: { @@ -375,6 +396,24 @@ export class Session { if (!this.subprocess?.stdin || this.disposed) return false; const payloadBuffer = payload ?? Buffer.alloc(0); + const frameSize = 5 + payloadBuffer.length; // 5-byte header + payload + + // Check queue limit to prevent OOM under backpressure + if ( + this.subprocessStdinQueuedBytes + frameSize > + MAX_SUBPROCESS_STDIN_QUEUE_BYTES + ) { + console.warn( + `[Session ${this.sessionId}] stdin queue full (${this.subprocessStdinQueuedBytes} bytes), dropping frame`, + ); + this.broadcastEvent("error", { + type: "error", + error: "Write queue full - input dropped", + code: "WRITE_QUEUE_FULL", + } satisfies TerminalErrorEvent); + return false; + } + const header = createFrameHeader(type, payloadBuffer.length); this.subprocessStdinQueue.push(header); @@ -534,6 +573,14 @@ export class Session { return this.subprocess !== null && this.exitCode === null; } + /** + * Wait for PTY to be ready to accept writes. + * Returns immediately if already ready, or waits for Spawned event. + */ + waitForReady(): Promise { + return this.ptyReadyPromise; + } + /** * Get number of attached clients */ diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index b3e9f793fe0..40d5e0f9494 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -66,15 +66,25 @@ export class TerminalHost { env: request.env, }); - // Run initial commands if provided + // Run initial commands if provided (after PTY is ready) if (request.initialCommands && request.initialCommands.length > 0) { - // Wait a bit for shell to initialize, then run commands - setTimeout(() => { + const initialCommands = request.initialCommands; + // Wait for PTY to be ready, then run commands + session.waitForReady().then(() => { + // Double-check session is still alive after await if (session?.isAlive) { - const cmdString = `${request.initialCommands?.join(" && ")}\n`; - session.write(cmdString); + try { + const cmdString = `${initialCommands.join(" && ")}\n`; + session.write(cmdString); + } catch (error) { + // Log but don't crash - initialCommands are best-effort + console.error( + `[TerminalHost] Failed to run initial commands for ${sessionId}:`, + error, + ); + } } - }, 100); + }); } this.sessions.set(sessionId, session); From 6a4deac02eeef8a4b67c0905bbdb03eb05cd2a63 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 15:23:01 +0200 Subject: [PATCH 39/51] refactor(desktop): improve code quality and organization - Extract magic number to SESSION_CLEANUP_DELAY_MS constant in daemon-manager - Move planning docs to docs/ directory - Extract useTerminalConnection hook to encapsulate tRPC mutations and refs - Refactor Terminal.tsx to use the new hook, reducing component complexity --- .../src/main/lib/terminal/daemon-manager.ts | 9 ++- .../TabsContent/Terminal/Terminal.tsx | 36 +++++----- .../TabsContent/Terminal/hooks/index.ts | 2 + .../Terminal/hooks/useTerminalConnection.ts | 67 +++++++++++++++++++ ...rminal-host-daemon-terminal-persistence.md | 0 .../LARGE_PASTE_HANG_ANALYSIS.md | 0 6 files changed, 92 insertions(+), 22 deletions(-) create mode 100644 apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts create mode 100644 apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/useTerminalConnection.ts rename 20251229-1858-terminal-host-daemon-terminal-persistence.md => docs/20251229-1858-terminal-host-daemon-terminal-persistence.md (100%) rename LARGE_PASTE_HANG_ANALYSIS.md => docs/LARGE_PASTE_HANG_ANALYSIS.md (100%) diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index bcb22886359..1bf680c0255 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -20,6 +20,13 @@ import { buildTerminalEnv, getDefaultShell } from "./env"; import { portManager } from "./port-manager"; import type { CreateSessionParams, SessionResult } from "./types"; +// ============================================================================= +// Constants +// ============================================================================= + +/** Delay before removing session from local cache after exit event */ +const SESSION_CLEANUP_DELAY_MS = 5000; + // ============================================================================= // Types // ============================================================================= @@ -93,7 +100,7 @@ export class DaemonTerminalManager extends EventEmitter { // Clean up session after delay setTimeout(() => { this.sessions.delete(paneId); - }, 5000); + }, SESSION_CLEANUP_DELAY_MS); }, ); diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 5a7cd31d64b..a58c23e03f2 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -22,6 +22,7 @@ import { setupResizeHandlers, type TerminalRendererRef, } from "./helpers"; +import { useTerminalConnection } from "./hooks"; import { parseCwd } from "./parseCwd"; import { TerminalSearch } from "./TerminalSearch"; import type { TerminalProps, TerminalStreamEvent } from "./types"; @@ -68,7 +69,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const [isSearchOpen, setIsSearchOpen] = useState(false); const [terminalCwd, setTerminalCwd] = useState(null); const [cwdConfirmed, setCwdConfirmed] = useState(false); - const [connectionError, setConnectionError] = useState(null); const setFocusedPane = useTabsStore((s) => s.setFocusedPane); const setTabAutoTitle = useTabsStore((s) => s.setTabAutoTitle); const updatePaneCwd = useTabsStore((s) => s.updatePaneCwd); @@ -76,6 +76,20 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const addFileViewerPane = useTabsStore((s) => s.addFileViewerPane); const terminalTheme = useTerminalTheme(); + // Terminal connection state and mutations (extracted to hook for cleaner code) + const { + connectionError, + setConnectionError, + workspaceCwd, + refs: { + createOrAttach: createOrAttachRef, + write: writeRef, + resize: resizeRef, + detach: detachRef, + clearScrollback: clearScrollbackRef, + }, + } = useTerminalConnection({ workspaceId }); + // Ref for initial theme to avoid recreating terminal on theme change const initialThemeRef = useRef(terminalTheme); @@ -109,9 +123,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { paneInitialCwdRef.current = paneInitialCwd; clearPaneInitialDataRef.current = clearPaneInitialData; - const { data: workspaceCwd } = - trpc.terminal.getWorkspaceCwd.useQuery(workspaceId); - // Use ref for workspaceCwd to avoid terminal recreation when query loads // (changing from undefined→string triggers useEffect, causing xterm errors) const workspaceCwdRef = useRef(workspaceCwd); @@ -200,23 +211,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const updateCwdRef = useRef(updateCwdFromData); updateCwdRef.current = updateCwdFromData; - const createOrAttachMutation = trpc.terminal.createOrAttach.useMutation(); - const writeMutation = trpc.terminal.write.useMutation(); - const resizeMutation = trpc.terminal.resize.useMutation(); - const detachMutation = trpc.terminal.detach.useMutation(); - const clearScrollbackMutation = trpc.terminal.clearScrollback.useMutation(); - - const createOrAttachRef = useRef(createOrAttachMutation.mutate); - const writeRef = useRef(writeMutation.mutate); - const resizeRef = useRef(resizeMutation.mutate); - const detachRef = useRef(detachMutation.mutate); - const clearScrollbackRef = useRef(clearScrollbackMutation.mutate); - createOrAttachRef.current = createOrAttachMutation.mutate; - writeRef.current = writeMutation.mutate; - resizeRef.current = resizeMutation.mutate; - detachRef.current = detachMutation.mutate; - clearScrollbackRef.current = clearScrollbackMutation.mutate; - const registerClearCallbackRef = useRef( useTerminalCallbacksStore.getState().registerClearCallback, ); diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts new file mode 100644 index 00000000000..7b3a4dcbde0 --- /dev/null +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts @@ -0,0 +1,2 @@ +export { useTerminalConnection } from "./useTerminalConnection"; +export type { UseTerminalConnectionOptions } from "./useTerminalConnection"; diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/useTerminalConnection.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/useTerminalConnection.ts new file mode 100644 index 00000000000..f98bd58276f --- /dev/null +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/useTerminalConnection.ts @@ -0,0 +1,67 @@ +import { useRef, useState } from "react"; +import { trpc } from "renderer/lib/trpc"; + +export interface UseTerminalConnectionOptions { + workspaceId: string; +} + +/** + * Hook to manage terminal connection state and mutations. + * + * Encapsulates: + * - tRPC mutations (createOrAttach, write, resize, detach, clearScrollback) + * - Stable refs to mutation functions (to avoid re-renders) + * - Connection error state + * - Workspace CWD query + * + * NOTE: Stream subscription is intentionally NOT included here because it needs + * direct access to xterm refs for event handling. Keep that in the component. + */ +export function useTerminalConnection({ + workspaceId, +}: UseTerminalConnectionOptions) { + const [connectionError, setConnectionError] = useState(null); + + // tRPC mutations + const createOrAttachMutation = trpc.terminal.createOrAttach.useMutation(); + const writeMutation = trpc.terminal.write.useMutation(); + const resizeMutation = trpc.terminal.resize.useMutation(); + const detachMutation = trpc.terminal.detach.useMutation(); + const clearScrollbackMutation = trpc.terminal.clearScrollback.useMutation(); + + // Query for workspace cwd + const { data: workspaceCwd } = + trpc.terminal.getWorkspaceCwd.useQuery(workspaceId); + + // Stable refs to mutation functions - these don't change identity on re-render + const createOrAttachRef = useRef(createOrAttachMutation.mutate); + const writeRef = useRef(writeMutation.mutate); + const resizeRef = useRef(resizeMutation.mutate); + const detachRef = useRef(detachMutation.mutate); + const clearScrollbackRef = useRef(clearScrollbackMutation.mutate); + + // Keep refs up to date + createOrAttachRef.current = createOrAttachMutation.mutate; + writeRef.current = writeMutation.mutate; + resizeRef.current = resizeMutation.mutate; + detachRef.current = detachMutation.mutate; + clearScrollbackRef.current = clearScrollbackMutation.mutate; + + return { + // Connection error state + connectionError, + setConnectionError, + + // Workspace CWD from query + workspaceCwd, + + // Stable refs to mutation functions (use these in effects/callbacks) + refs: { + createOrAttach: createOrAttachRef, + write: writeRef, + resize: resizeRef, + detach: detachRef, + clearScrollback: clearScrollbackRef, + }, + }; +} diff --git a/20251229-1858-terminal-host-daemon-terminal-persistence.md b/docs/20251229-1858-terminal-host-daemon-terminal-persistence.md similarity index 100% rename from 20251229-1858-terminal-host-daemon-terminal-persistence.md rename to docs/20251229-1858-terminal-host-daemon-terminal-persistence.md diff --git a/LARGE_PASTE_HANG_ANALYSIS.md b/docs/LARGE_PASTE_HANG_ANALYSIS.md similarity index 100% rename from LARGE_PASTE_HANG_ANALYSIS.md rename to docs/LARGE_PASTE_HANG_ANALYSIS.md From ad1347f340f84fd62a0f23ba827fc99fe1c95c46 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Wed, 31 Dec 2025 17:16:30 +0200 Subject: [PATCH 40/51] fix(desktop): avoid spawning daemon during orphan cleanup when persistence disabled Previously, shutdownOrphanedDaemon() would call client.shutdown() which internally calls ensureConnected(), spawning a new daemon just to immediately shut it down. This happened on every app startup when terminal persistence was disabled. Added tryConnectAndAuthenticate() and shutdownIfRunning() methods to TerminalHostClient that only attempt cleanup if a daemon is already running, avoiding wasteful spawn+kill cycles. --- .../src/main/lib/terminal-host/client.ts | 59 +++++++++++++++++++ apps/desktop/src/main/lib/terminal/index.ts | 24 +++++--- 2 files changed, 76 insertions(+), 7 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 83490909734..1096d7c2ebb 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -244,6 +244,44 @@ export class TerminalHostClient extends EventEmitter { } } + /** + * Try to connect and authenticate to an existing daemon without spawning. + * Returns true if successfully connected and authenticated, false if no daemon running. + * This is useful for cleanup operations that should only act on existing daemons. + */ + async tryConnectAndAuthenticate(): Promise { + // Already connected and authenticated + if ( + this.connectionState === ConnectionState.CONNECTED && + this.socket && + this.authenticated + ) { + return true; + } + + // Don't interfere with an in-progress connection + if (this.connectionState === ConnectionState.CONNECTING) { + return false; + } + + this.connectionState = ConnectionState.CONNECTING; + + try { + const connected = await this.tryConnect(); + if (!connected) { + this.connectionState = ConnectionState.DISCONNECTED; + return false; + } + + await this.authenticate(); + this.connectionState = ConnectionState.CONNECTED; + return true; + } catch { + this.connectionState = ConnectionState.DISCONNECTED; + return false; + } + } + /** * Try to connect to the daemon socket. * Returns true if connected, false if daemon not running. @@ -818,6 +856,27 @@ export class TerminalHostClient extends EventEmitter { return response; } + /** + * Shutdown the daemon if it's currently running, without spawning a new one. + * Returns true if daemon was running and shutdown was sent, false if no daemon was running. + * This is useful for cleanup operations that should only affect existing daemons. + */ + async shutdownIfRunning( + request: ShutdownRequest = {}, + ): Promise<{ wasRunning: boolean }> { + const connected = await this.tryConnectAndAuthenticate(); + if (!connected) { + return { wasRunning: false }; + } + + try { + await this.sendRequest("shutdown", request); + } finally { + this.disconnect(); + } + return { wasRunning: true }; + } + /** * Disconnect from daemon (but don't stop it) */ diff --git a/apps/desktop/src/main/lib/terminal/index.ts b/apps/desktop/src/main/lib/terminal/index.ts index 2b564a4a53f..ef80cfb8e00 100644 --- a/apps/desktop/src/main/lib/terminal/index.ts +++ b/apps/desktop/src/main/lib/terminal/index.ts @@ -84,6 +84,8 @@ export function getActiveTerminalManager(): * Shutdown any orphaned daemon process. * Should be called on app startup when daemon mode is disabled to clean up * any daemon left running from a previous session with persistence enabled. + * + * Uses shutdownIfRunning() to avoid spawning a new daemon just to shut it down. */ export async function shutdownOrphanedDaemon(): Promise { if (isDaemonModeEnabled()) { @@ -93,13 +95,21 @@ export async function shutdownOrphanedDaemon(): Promise { try { const client = getTerminalHostClient(); - // Try to connect and shutdown - if no daemon is running, this will fail - // which is fine (nothing to clean up) - await client.shutdown({ killSessions: true }); - console.log("[TerminalManager] Shutdown orphaned daemon successfully"); - } catch { - // No daemon running or failed to connect - this is expected - console.log("[TerminalManager] No orphaned daemon to shutdown"); + // Use shutdownIfRunning to avoid spawning a daemon if none exists + const { wasRunning } = await client.shutdownIfRunning({ + killSessions: true, + }); + if (wasRunning) { + console.log("[TerminalManager] Shutdown orphaned daemon successfully"); + } else { + console.log("[TerminalManager] No orphaned daemon to shutdown"); + } + } catch (error) { + // Unexpected error during shutdown attempt + console.warn( + "[TerminalManager] Error during orphan daemon cleanup:", + error, + ); } finally { // Always dispose the client to clean up any partial state disposeTerminalHostClient(); From 6766b21a85ad4a6c0b38dab783be8efa2e757684 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Thu, 1 Jan 2026 13:02:32 +0200 Subject: [PATCH 41/51] docs(desktop): add terminal reattach/rendering research log --- .../TERMINAL_RENDERING_REATTACH_RESEARCH.md | 253 ++++++++++++++++++ 1 file changed, 253 insertions(+) create mode 100644 apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md diff --git a/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md b/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md new file mode 100644 index 00000000000..624c9871b0e --- /dev/null +++ b/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md @@ -0,0 +1,253 @@ +# Terminal Rendering + Reattach Research Log (Scratchpad) + +This doc is a living scratchpad for understanding and fixing two related UX problems in Superset Desktop terminals: + +1. **TUI corruption after switching away and back** (e.g. OpenCode/vim-like apps). +2. **Jittery resizing** (especially noticeable on macOS with Canvas rendering). + +It’s written for engineers who **do not have the original investigation context**. + +--- + +## TL;DR + +- **Corruption on tab switch** is usually not “random rendering”; it’s a *reattach correctness* problem: TUIs emit **incremental** escape sequences that assume a precise current screen/mode/cursor state. If we detach/unmount the renderer and later rebuild it from a snapshot, any tiny mismatch becomes visible as corruption when the TUI continues sending incremental updates. +- **Resize jitter** is mostly a throughput problem: resizing causes frequent PTY resizes + full-screen repaints from TUIs, and xterm.js processes input in **time-sliced batches** to avoid blocking the UI thread. Under heavy output, it can’t stay at 60fps without aggressive resize coalescing and/or a GPU-first renderer. + +--- + +## Current Architecture (as implemented in this repo) + +High-level data flow: + +``` +Renderer (xterm.js in React) + ↕ TRPC stream/write calls +Electron main + ↕ Unix socket IPC +terminal-host daemon (Node.js) + ↕ stdin/stdout IPC +per-session PTY subprocess (Node.js + node-pty) + ↕ PTY +shell / TUI (opencode, vim, etc.) +``` + +Key concepts: + +- **Daemon owns sessions** so terminals persist across app restarts. +- **Headless emulator** in daemon maintains a model of the terminal state (screen + modes) and produces a snapshot for reattach. +- **Renderer is recreated** on React mount; on “switch away” we may detach/unmount and later reattach to the daemon session. + +Related docs/code: +- Large paste reliability notes: `LARGE_PASTE_HANG_ANALYSIS.md` (repo root). +- Headless emulator: `apps/desktop/src/main/lib/terminal-host/headless-emulator.ts`. +- Renderer creation / GPU renderer selection: `apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts`. + +Related problem area: +- **Large paste reliability** was previously a major source of hangs/dropped input. The current direction is per-PTY subprocess isolation + explicit backpressure handling (treating `EAGAIN` as retry/backoff instead of “drop”). See `LARGE_PASTE_HANG_ANALYSIS.md` for details. + +--- + +## Symptom 1: TUI corruption after switching away and back + +### What we observe + +- Happens when switching away from a terminal and then returning to it. +- Not necessarily tied to full app restart. +- Affects TUIs that are screen-oriented and repaint frequently (OpenCode is a common reproduction). + +### Why this is hard (fundamental) + +Most TUIs do **incremental drawing**: +- move cursor +- rewrite a few cells +- update a small region +- assume a specific active buffer (normal vs alternate screen) +- assume a specific mode state (cursor keys, mouse tracking, bracketed paste, etc.) + +If we “reattach” by creating a new xterm renderer and restoring the screen from a snapshot, then: +- if the snapshot is taken **mid-update** (or we rehydrate in the wrong order), +- or if any output is missed/duplicated around the detach boundary, +- or if modes differ slightly between headless model and the new renderer, + +…the next incremental updates from the TUI apply relative to the wrong baseline and appear as corruption. + +This is not unique to Superset: xterm.js itself historically describes the only reliable way to “set” terminal state via public API as **replaying the commands that produced it**, and points toward headless/serialization as a reconnection primitive. + +### Key point: persistence vs rendering + +- **Persistence feature** increases exposure because it introduces **detach/attach** as a common lifecycle event. +- The corruption itself is typically a combination of: + - **reattach semantics** (state mismatch), and sometimes + - **renderer quirks** (WebGL issues on macOS, hidden/visible transitions). + +If you never detach/unmount the renderer on tab switch, you remove the most failure-prone step. + +--- + +## Symptom 2: Resize feels jittery + +### What we observe + +- Resizing panes feels less “buttery” than modern terminals like Warp. +- Jitter is especially noticeable with TUI output in flight and when using CPU rendering (Canvas). + +### Why this happens (fundamental) + +Resizing is expensive in a terminal for two reasons: + +1) **Logical resize triggers PTY resize → TUIs repaint** +- When cols/rows change, the PTY receives a resize (SIGWINCH on Unix-like systems). +- TUIs often repaint large regions or the entire screen in response. +- That yields a burst of output (escape-sequence heavy) right while we are doing layout work. + +2) **xterm.js has limited throughput and is intentionally time-sliced** +- `term.write()` is non-blocking; xterm buffers data and processes it in chunks designed to stay under ~one frame budget (≈16ms) to avoid blocking the UI thread. +- When producers are “too fast”, the terminal gets sluggish and may stop responding to input; hence flow control/backpressure is required in high-throughput pipelines. + +So “resize jitter” often means: **we’re asking xterm to keep up with heavy output + frequent resizes** faster than it can process/render. + +### Why Warp feels smooth + +Warp’s architecture is built around a GPU-first renderer (Metal on macOS) and careful minimization of bottlenecks (PTY read/parse, render, scroll). + +That doesn’t automatically mean “WebGL fixes it” inside xterm.js; in practice `xterm-webgl` has had regressions and rendering issues, and on macOS we’ve repeatedly seen corruption when hiding/showing terminals or switching panes. + +--- + +## Renderer notes (macOS) + +### WebGL vs Canvas vs DOM + +- **WebGL**: best performance potential, but can be fragile (glyph atlas / context loss / hidden-canvas transitions). +- **Canvas**: more stable but more CPU-bound (often leads to jitter under load). +- **DOM**: typically slowest, mostly a fallback. + +xterm.js’ core rendering and addons list includes WebGL and Serialize, but they come with tradeoffs. + +Current repo approach (as of recent fixes): +- Default to **Canvas on macOS** to avoid WebGL corruption on tab switching. +- Allow overriding for testing via localStorage: + - `localStorage.setItem('terminal-renderer', 'webgl' | 'canvas' | 'dom')` + - `localStorage.removeItem('terminal-renderer')` to revert to default. + +--- + +## Why switching away/back is specifically triggering corruption + +When a terminal is unmounted/hidden and later recreated: + +- A **new xterm instance** is created. +- We restore from daemon snapshot (serialize output + “rehydrate sequences”). +- The TUI process never stopped; it keeps emitting updates based on its own internal model. + +The critical window is the detach/attach boundary: + +- If the daemon snapshot isn’t taken at a stable boundary (e.g. “frame complete”), +- or if output continues while we are capturing/restoring and we apply it in a different order, +- or if we rehydrate modes (alternate screen, cursor modes, mouse tracking, bracketed paste) in the wrong sequence, + +…the restored xterm state can be “close enough” for plain shells but not for screen-oriented TUIs. + +This aligns with how terminal state restoration is generally discussed in the ecosystem: the most robust systems keep an authoritative server-side screen model and redraw it to clients on attach (tmux-style). + +--- + +## Design Options (out-of-the-box) + +These are “shape of the system” ideas, not small bug fixes. + +### Option A — Don’t detach on tab switch (keep renderer alive) + +Make tab switching purely a show/hide operation: +- keep the xterm instance alive in memory (and ideally attached to the session) +- avoid rehydrate/snapshot on routine navigation + +Pros: +- Removes the core “reattach baseline mismatch” failure mode. +- Likely the fastest path to eliminating OpenCode corruption on switch-back. + +Cons: +- More memory/CPU if many terminals are open. +- Might need policies (e.g. keep last N terminals “hot”; hibernate older ones). + +### Option B — tmux-style server authoritative screen diff + +Make the daemon the “truth” for terminal UI: +- daemon maintains the full screen grid and cursor/mode state +- on attach: send full state (grid + modes) +- during run: send diffs/updates to clients + +Pros: +- Reattach becomes robust (clients can come/go without state mismatch). +- Matches how tmux achieves persistence. + +Cons: +- Significant engineering effort: you’re effectively building a multiplexer protocol. +- Must ensure your screen model matches what the client renders (font metrics, wrapping, etc.). + +### Option C — Use tmux/screen as the persistence layer + +Put tmux behind the scenes: +- daemon starts tmux, each terminal is a tmux pane +- renderer is a normal terminal client + +Pros: +- tmux already solved “detach/reattach with a stable screen model”. +- Avoids inventing a custom diff protocol. + +Cons: +- External dependency and platform concerns. +- Integrating with our UX/workspace model could be awkward. + +### Option D — Per-terminal WebContents / BrowserView “view host” + +Instead of recreating terminals in React, host each terminal view in a persistent Electron view: +- switch visibility at the compositor level + +Pros: +- Avoid rehydrate for navigation. +- Strong isolation between terminal views. + +Cons: +- More complex Electron lifecycle; resource usage can rise. + +### Option E — Own the renderer (Warp/WezTerm direction) + +Long-term: a native/GPU-first terminal renderer and more control over resizing. + +Pros: +- Best chance at “buttery” resize + fewer corruption classes. +- Warp shows the ceiling when you own the rendering pipeline. + +Cons: +- Very large scope; essentially building a terminal engine inside the app. + +--- + +## Practical experiment ideas (near-term) + +These are experiments that can confirm root causes quickly: + +1) **Keep renderer alive on tab switch** (no detach/reattach) and see if OpenCode corruption disappears. +2) **Coalesce resizes**: + - “visual resize” during drag (scale), only “logical resize” (PTY cols/rows) on settle. + - lower-frequency resize dispatch (debounce/throttle) to reduce repaint storms. +3) **Force TUI redraw on attach**: + - e.g. synthetic resize nudge or sending a reset sequence (careful: many resets have side effects). + - This is a mitigation, not a root fix. +4) **Instrument attach boundary**: + - capture sequence numbers: last byte processed in emulator vs first byte delivered to client after attach + - detect and log gaps/duplication + - confirm mode parity (alternate screen, bracketed paste, mouse modes) + +--- + +## Reference links + +- xterm.js flow control guide (buffering, time-sliced processing, throughput limits): https://xtermjs.org/docs/guides/flowcontrol/ +- xterm.js issue: “Support saving and restoring of terminal state” (headless + “replay commands” framing): https://github.com/xtermjs/xterm.js/issues/595 +- xterm.js supported terminal sequences (what is/ isn’t supported): https://xtermjs.org/docs/api/vtfeatures/ +- xterm.js WebGL regression example: https://github.com/xtermjs/xterm.js/issues/4665 +- tmux client/server architecture overview (high level): https://www.augmentcode.com/open-source/tmux/tmux +- Warp “How Warp Works” (GPU-first and performance bottlenecks): https://www.warp.dev/blog/how-warp-works From ff19829ae08ec5b030c6bc8bd1e69b1f00013507 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Thu, 1 Jan 2026 14:04:14 +0200 Subject: [PATCH 42/51] chore(desktop): improve code hygiene for PR review - Reframe PtyWriteQueue docstring to accurately describe limitations (reduces event loop starvation, does not prevent blocking) - Rename prototype/ to __tests__/ for conventional test organization --- .../headless-roundtrip.test.ts | 0 .../src/main/lib/terminal/pty-write-queue.ts | 25 +++++++++++++------ 2 files changed, 17 insertions(+), 8 deletions(-) rename apps/desktop/src/main/lib/terminal-host/{prototype => __tests__}/headless-roundtrip.test.ts (100%) diff --git a/apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts b/apps/desktop/src/main/lib/terminal-host/__tests__/headless-roundtrip.test.ts similarity index 100% rename from apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts rename to apps/desktop/src/main/lib/terminal-host/__tests__/headless-roundtrip.test.ts diff --git a/apps/desktop/src/main/lib/terminal/pty-write-queue.ts b/apps/desktop/src/main/lib/terminal/pty-write-queue.ts index f0e35c90a9b..e0e4131bb15 100644 --- a/apps/desktop/src/main/lib/terminal/pty-write-queue.ts +++ b/apps/desktop/src/main/lib/terminal/pty-write-queue.ts @@ -1,18 +1,27 @@ import type { IPty } from "node-pty"; /** - * A write queue for PTY that prevents blocking the event loop. + * A write queue for PTY that reduces event loop starvation. * - * Problem: node-pty's write() is synchronous and blocks when the kernel's - * PTY buffer fills up (~4KB on macOS). Large pastes (e.g., 16KB+) can freeze - * the entire daemon, causing all requests to timeout. + * Context: This is used in the non-daemon (in-process) terminal mode. + * For daemon mode, the real backpressure handling (EAGAIN retry with backoff) + * is implemented in pty-subprocess.ts. * - * Solution: Queue writes and process them in chunks, yielding to the event - * loop between chunks. This keeps the daemon responsive while still delivering - * all data to the PTY. + * Problem: node-pty's write() is synchronous. While the kernel buffer rarely + * fills completely, processing large pastes in a single event loop tick can + * starve other work (IPC handlers, UI updates). + * + * Solution: Queue writes and process them in small chunks, yielding to the + * event loop between chunks via setTimeout. This improves responsiveness + * during large pastes. + * + * Limitations: + * - Does NOT handle true kernel-level backpressure (EAGAIN/EWOULDBLOCK) + * - If node-pty.write() blocks, this cannot prevent it + * - For robust backpressure handling, use daemon mode with subprocess isolation * * Features: - * - Chunked writes to prevent blocking + * - Chunked writes to reduce event loop starvation * - Memory-bounded queue to prevent OOM * - Backpressure signaling when queue is full * - Graceful handling of PTY closure From 5008136ddeca7b3e6a7589913bcc57dc60451205 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Thu, 1 Jan 2026 20:43:09 +0200 Subject: [PATCH 43/51] fix(desktop): resolve TUI corruption on tab switch via SIGWINCH redraw For TUI sessions (alternate screen mode), serialized snapshots render incorrectly due to styled spaces and positioning issues. Instead of trying to perfectly serialize and restore TUI state, we now: 1. Skip writing the broken snapshot for alt-screen sessions 2. Enter alt-screen mode directly 3. Enable streaming first so live PTY output comes through 4. Trigger SIGWINCH via resize down/up - TUI redraws itself Trade-off: Brief visual flash as TUI redraws, but the result is correct. Normal shell sessions still use the snapshot approach which works well. - Add SIGWINCH-based redraw for TUI (alt-screen) session reattach - Remove dead resize nudge code (now handled by SIGWINCH approach) - Clean up verbose debug logging from investigation - Update research doc with final fix documentation - Add snapshot boundary tracking for consistent daemon-side captures --- .../TERMINAL_RENDERING_REATTACH_RESEARCH.md | 227 ++++++++++++++++++ .../lib/terminal-host/headless-emulator.ts | 51 ++++ .../src/main/lib/terminal-host/types.ts | 18 ++ .../src/main/lib/terminal/daemon-manager.ts | 1 + apps/desktop/src/main/lib/terminal/types.ts | 14 ++ .../desktop/src/main/terminal-host/session.ts | 130 +++++++++- .../TabsContent/Terminal/Terminal.tsx | 117 ++++++++- 7 files changed, 543 insertions(+), 15 deletions(-) diff --git a/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md b/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md index 624c9871b0e..951a70f7991 100644 --- a/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md +++ b/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md @@ -243,6 +243,233 @@ These are experiments that can confirm root causes quickly: --- +## Investigation Log (January 2026) + +### Observed Corruption + +When switching workspaces with OpenCode running, the restored terminal shows **missing content**: +- The "opencode" ASCII art logo is completely missing +- The "Ask anything..." input box is missing +- Only partial UI elements remain (agent name, status bar) +- Cursor position is wrong (middle of screen instead of input area) + +This is NOT garbled characters or wrong colors—it's **missing screen regions**, suggesting the snapshot content is incomplete or truncated. + +### Hypotheses Tested and Ruled Out + +| # | Hypothesis | Test | Result | +|---|------------|------|--------| +| 1 | **Live events interleaving with snapshot** - Events arrive before snapshot is applied | Added logging: `PENDING_EVENTS` count at snapshot time | ❌ PENDING_EVENTS=0 in all cases | +| 2 | **Double alt-screen entry** - Manual `\x1b[?1049h` + scrollback's copy | Disabled manual entry, logged if scrollback contains it | ❌ Still corrupted with manual entry disabled | +| 3 | **WebGL renderer issues** - Glyph atlas corruption | Forced Canvas renderer via localStorage | ❌ Still corrupted with Canvas | +| 4 | **Dimension mismatch** - Snapshot written at wrong cols/rows | Logged xterm vs snapshot dimensions | ❌ MATCH=true (106x60 = 106x60) | +| 5 | **Alt-screen buffer mismatch** - modes.altScreen disagrees with scrollback's last transition | Logged lastIndexOf for enter/exit sequences | ❌ CONSISTENT=true | + +### Key Observations from Logs + +``` +APPLYING SNAPSHOT: scrollback=8247 rehydrate=48 altScreen=true PENDING_EVENTS=0 +ALT-SCREEN CHECK: modes.altScreen=true scrollbackHasAlt=true +ALT-SCREEN TRANSITION: lastEnterIdx=275 lastExitIdx=-1 lastTransition=ENTER CONSISTENT=true +DIMENSION CHECK: xterm=106x60 snapshot=106x60 MATCH=true +``` + +- Dimensions match perfectly +- Alt-screen mode is consistent between daemon and scrollback +- No pending events at snapshot time +- rehydrateSequences is only 48 bytes (may be too small for full TUI state?) + +### Remaining Hypotheses (Not Yet Tested) + +1. **Flush timeout during snapshot** - Daemon's `flushEmulatorWrites()` times out under heavy output, capturing incomplete screen state + +2. **Snapshot content is incomplete/stale** - The headless emulator isn't capturing the full screen buffer correctly for alternate screen TUIs + +3. **Missing TUI state in rehydrateSequences** - 48 bytes may not cover all modes TUIs need (scroll region, saved cursor, character sets, etc.) + +4. **Cursor position not in snapshot** - TUI assumes cursor is in input area, but we're not restoring cursor position + +### Next Steps + +1. **Investigate daemon-side snapshot generation** (`headless-emulator.ts`) + - Is the alternate screen buffer being serialized correctly? + - Is cursor position included in the snapshot? + - Does flush timeout occur during capture? + +2. **Log actual snapshot content** - Inspect first/last bytes to see if content is truncated + +3. **Compare headless emulator state vs actual screen** - Hash comparison to detect discrepancies + +### Code Changes Made During Investigation + +Added diagnostic logging to `Terminal.tsx`: +- `APPLYING SNAPSHOT` - scrollback size, rehydrate size, alt screen mode, pending events +- `ALT-SCREEN CHECK` - whether scrollback/rehydrate contain alt-screen sequences +- `ALT-SCREEN TRANSITION` - which transition (enter/exit) came last, consistency check +- `DIMENSION CHECK` - xterm cols/rows vs snapshot cols/rows +- `QUEUING/FLUSHING` - event timing during reattach + +These logs can be removed once the root cause is found. + +--- + +## ROOT CAUSE IDENTIFIED & FIX IMPLEMENTED (January 2026) + +### The Bug: Flush Timeout During Snapshot + +**Location:** `Session.attach()` in `apps/desktop/src/main/terminal-host/session.ts` + +**The Problem Flow:** + +``` +1. User switches tabs, triggering attach() +2. attach() calls flushEmulatorWrites(500ms) to process pending PTY output +3. With continuous TUI output (like OpenCode), the queue NEVER empties in 500ms +4. Promise.race() times out, but emulatorWriteQueue still has unprocessed data +5. attach() immediately calls getSnapshotAsync() +6. Snapshot captures INCOMPLETE state - queued data never made it to xterm! +``` + +**The Data Flow:** +``` +PTY → Session.emulatorWriteQueue → HeadlessEmulator.terminal (xterm) → snapshot + ↑ + STUCK HERE if timeout +``` + +**Why Previous Tests Missed This:** +- Renderer-side logs showed `PENDING_EVENTS=0` - but that's the RENDERER's queue +- The DAEMON's `emulatorWriteQueue` was the culprit +- The bug is invisible from the renderer's perspective + +### The Fix: Snapshot Boundary Tracking + +Instead of waiting for the entire queue to empty (impossible with continuous output), we now: + +1. **Mark a "snapshot boundary"** when attach() is called (current queue length) +2. **Decrement the counter** as items are processed +3. **Resolve when boundary reached** (processed all pre-attach data) +4. **Ignore post-attach data** for snapshot purposes (it will be streamed live) + +**Key Changes:** + +```typescript +// session.ts - New state tracking +private snapshotBoundaryIndex: number | null = null; +private snapshotBoundaryWaiters: Array<() => void> = []; + +// New method: flushToSnapshotBoundary(timeoutMs) +// - Sets boundary = queue.length at call time +// - Waits for that many items to be processed +// - Guarantees consistent point-in-time snapshot + +// attach() now uses: +const reachedBoundary = await this.flushToSnapshotBoundary(ATTACH_FLUSH_TIMEOUT_MS); +// Instead of: +await this.flushEmulatorWrites(ATTACH_FLUSH_TIMEOUT_MS); // OLD - broken +``` + +### Why This Fix Works + +- With continuous output, new data keeps arriving AFTER attach() is called +- We only care about data received BEFORE attach - that's what defines our snapshot point +- By counting items instead of waiting for empty, we get a consistent snapshot +- Post-attach data streams live to the renderer (normal operation) + +### Logging Added for Verification + +**Daemon-side (`session.ts`):** +``` +[Session X] ATTACH FLUSH OK: flushTime=123ms processed=42 items (8192 bytes) +[Session X] ATTACH FLUSH TIMEOUT: flushTime=500ms queueBefore=100 queueAfter=75 +``` + +**Headless emulator (`headless-emulator.ts`):** +``` +[HeadlessEmulator] SNAPSHOT: altScreen=true snapshotSize=12345 rehydrateSize=48 cols=106 rows=60 +``` + +### Testing Needed + +1. Run OpenCode in a terminal +2. Switch to a different workspace tab +3. Switch back +4. Verify: ASCII art logo and input box should now be visible +5. Check logs for "ATTACH FLUSH OK" instead of "ATTACH FLUSH TIMEOUT" + +--- + +## FINAL FIX: SIGWINCH-Based TUI Redraw (January 2026) + +### Why Snapshots Don't Work for TUIs + +After implementing the snapshot boundary fix above, we discovered a **deeper issue**: even with correct snapshots, TUI rendering was still broken. + +**The Problem:** + +1. TUIs use "styled spaces" (spaces with background colors) to create UI elements +2. SerializeAddon captures buffer cell content, but serialization of styled empty cells is inconsistent +3. When restored, the serialized snapshot renders sparsely—missing panels, borders, and UI chrome + +**Diagnostic Data:** +``` +ALT-BUFFER: lines=52 nonEmpty=14 chars=2156 +``` +A full TUI screen (91×52 = 4732 cells) should have far more content. The alt buffer was sparse. + +### The Solution: Skip Snapshot, Trigger SIGWINCH + +Instead of trying to perfectly serialize and restore TUI state, we now: + +1. **Skip writing the broken snapshot** for alt-screen (TUI) sessions +2. **Enter alt-screen mode** directly so TUI output goes to the correct buffer +3. **Enable streaming first** so live PTY output comes through +4. **Trigger SIGWINCH** via resize down/up—TUI redraws itself from scratch + +**Key Code (Terminal.tsx):** +```typescript +if (isAltScreenReattach) { + // Enter alt-screen mode + xterm.write("\x1b[?1049h"); + + // Apply non-alt-screen rehydration sequences + if (result.snapshot?.rehydrateSequences) { ... } + + // Enable streaming BEFORE resize + isStreamReadyRef.current = true; + flushPendingEvents(); + + // Trigger SIGWINCH + resizeRef.current({ paneId, cols, rows: rows - 1 }); + setTimeout(() => { + resizeRef.current({ paneId, cols, rows }); + }, 100); + + return; // Skip normal snapshot flow +} +``` + +### Trade-offs + +| Aspect | Before (Snapshot) | After (SIGWINCH) | +|--------|-------------------|------------------| +| Visual continuity | Broken (sparse/corrupted) | Brief flash as TUI redraws | +| Correctness | Unreliable | Reliable (TUI owns its state) | +| Complexity | High (serialize/deserialize TUI state) | Low (let TUI handle it) | +| Performance | Single write of serialized data | TUI full repaint via stream | + +### Why This Works + +- TUIs maintain their own internal state and can redraw on SIGWINCH +- We're not trying to perfectly capture a moving target (incremental TUI updates) +- The TUI is the authority on its own display—we just trigger a refresh + +### Non-TUI Sessions Unchanged + +Normal shell sessions (not in alternate screen mode) still use the snapshot approach, which works correctly for scrollback history and shell prompts. + +--- + ## Reference links - xterm.js flow control guide (buffering, time-sliced processing, throughput limits): https://xtermjs.org/docs/guides/flowcontrol/ diff --git a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts index 15460908784..02522ad4f54 100644 --- a/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts +++ b/apps/desktop/src/main/lib/terminal-host/headless-emulator.ts @@ -229,6 +229,51 @@ export class HeadlessEmulator { const rehydrateSequences = this.generateRehydrateSequences(); + // Build debug diagnostics + const xtermBufferType = this.terminal.buffer.active.type; + const hasAltScreenEntry = snapshotAnsi.includes("\x1b[?1049h"); + + let altBufferDebug: + | { + lines: number; + nonEmptyLines: number; + totalChars: number; + cursorX: number; + cursorY: number; + sampleLines: string[]; + } + | undefined; + + if (this.modes.alternateScreen || xtermBufferType === "alternate") { + const altBuffer = this.terminal.buffer.alternate; + let nonEmptyLines = 0; + let totalChars = 0; + const sampleLines: string[] = []; + + for (let i = 0; i < altBuffer.length; i++) { + const line = altBuffer.getLine(i); + if (line) { + const lineText = line.translateToString(true); + if (lineText.trim().length > 0) { + nonEmptyLines++; + totalChars += lineText.length; + if (sampleLines.length < 3) { + sampleLines.push(lineText.slice(0, 80)); + } + } + } + } + + altBufferDebug = { + lines: altBuffer.length, + nonEmptyLines, + totalChars, + cursorX: altBuffer.cursorX, + cursorY: altBuffer.cursorY, + sampleLines, + }; + } + return { snapshotAnsi, rehydrateSequences, @@ -237,6 +282,12 @@ export class HeadlessEmulator { cols: this.terminal.cols, rows: this.terminal.rows, scrollbackLines: this.getScrollbackLines(), + debug: { + xtermBufferType, + hasAltScreenEntry, + altBuffer: altBufferDebug, + normalBufferLines: this.terminal.buffer.normal.length, + }, }; } diff --git a/apps/desktop/src/main/lib/terminal-host/types.ts b/apps/desktop/src/main/lib/terminal-host/types.ts index f63303b801b..877e7962db5 100644 --- a/apps/desktop/src/main/lib/terminal-host/types.ts +++ b/apps/desktop/src/main/lib/terminal-host/types.ts @@ -90,6 +90,24 @@ export interface TerminalSnapshot { rows: number; /** Scrollback line count */ scrollbackLines: number; + /** Debug diagnostics for troubleshooting (optional) */ + debug?: { + /** xterm's internal buffer type */ + xtermBufferType: string; + /** Whether serialized output contains alt screen entry */ + hasAltScreenEntry: boolean; + /** Alt buffer stats if in alt screen */ + altBuffer?: { + lines: number; + nonEmptyLines: number; + totalChars: number; + cursorX: number; + cursorY: number; + sampleLines: string[]; + }; + /** Normal buffer line count */ + normalBufferLines: number; + }; } // ============================================================================= diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 1bf680c0255..c591ea17b49 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -247,6 +247,7 @@ export class DaemonTerminalManager extends EventEmitter { cols: response.snapshot.cols, rows: response.snapshot.rows, scrollbackLines: response.snapshot.scrollbackLines, + debug: response.snapshot.debug, }, }; } diff --git a/apps/desktop/src/main/lib/terminal/types.ts b/apps/desktop/src/main/lib/terminal/types.ts index b7d2b4eff29..1c656a7534e 100644 --- a/apps/desktop/src/main/lib/terminal/types.ts +++ b/apps/desktop/src/main/lib/terminal/types.ts @@ -50,6 +50,20 @@ export interface SessionResult { cols: number; rows: number; scrollbackLines: number; + /** Debug diagnostics for troubleshooting */ + debug?: { + xtermBufferType: string; + hasAltScreenEntry: boolean; + altBuffer?: { + lines: number; + nonEmptyLines: number; + totalChars: number; + cursorX: number; + cursorY: number; + sampleLines: string[]; + }; + normalBufferLines: number; + }; }; } diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index a3db6618843..8eec4ed148f 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -105,6 +105,10 @@ export class Session { private emulatorWriteScheduled = false; private emulatorFlushWaiters: Array<() => void> = []; + // Snapshot boundary tracking - allows capturing consistent state with continuous output + private snapshotBoundaryIndex: number | null = null; + private snapshotBoundaryWaiters: Array<() => void> = []; + // Callbacks private onSessionExit?: ( sessionId: string, @@ -355,9 +359,13 @@ export class Session { this.emulatorWriteQueue = []; this.emulatorWriteQueuedBytes = 0; this.emulatorWriteScheduled = false; + this.snapshotBoundaryIndex = null; const waiters = this.emulatorFlushWaiters; this.emulatorFlushWaiters = []; for (const resolve of waiters) resolve(); + const boundaryWaiters = this.snapshotBoundaryWaiters; + this.snapshotBoundaryWaiters = []; + for (const resolve of boundaryWaiters) resolve(); } /** @@ -502,9 +510,13 @@ export class Session { this.emulatorWriteQueue = []; this.emulatorWriteQueuedBytes = 0; this.emulatorWriteScheduled = false; + this.snapshotBoundaryIndex = null; const waiters = this.emulatorFlushWaiters; this.emulatorFlushWaiters = []; for (const resolve of waiters) resolve(); + const boundaryWaiters = this.snapshotBoundaryWaiters; + this.snapshotBoundaryWaiters = []; + for (const resolve of boundaryWaiters) resolve(); return; } @@ -527,9 +539,35 @@ export class Session { chunk = chunk.slice(0, MAX_CHUNK_CHARS); } else { this.emulatorWriteQueue.shift(); + + // Decrement boundary counter if tracking + if (this.snapshotBoundaryIndex !== null) { + this.snapshotBoundaryIndex--; + } } + this.emulatorWriteQueuedBytes -= chunk.length; this.emulator.write(chunk); + + // Check if we've reached the snapshot boundary (processed all items up to it) + if (this.snapshotBoundaryIndex === 0) { + this.snapshotBoundaryIndex = null; + const boundaryWaiters = this.snapshotBoundaryWaiters; + this.snapshotBoundaryWaiters = []; + for (const resolve of boundaryWaiters) resolve(); + // Continue processing remaining items (arrived after boundary was set) + if (this.emulatorWriteQueue.length > 0) { + setImmediate(() => { + this.processEmulatorWriteQueue(); + }); + return; + } + this.emulatorWriteScheduled = false; + const waiters = this.emulatorFlushWaiters; + this.emulatorFlushWaiters = []; + for (const resolve of waiters) resolve(); + return; + } } if (this.emulatorWriteQueue.length > 0) { @@ -540,6 +578,15 @@ export class Session { } this.emulatorWriteScheduled = false; + + // If we've drained the queue, any pending boundary is also reached + if (this.snapshotBoundaryIndex !== null) { + this.snapshotBoundaryIndex = null; + const boundaryWaiters = this.snapshotBoundaryWaiters; + this.snapshotBoundaryWaiters = []; + for (const resolve of boundaryWaiters) resolve(); + } + const waiters = this.emulatorFlushWaiters; this.emulatorFlushWaiters = []; for (const resolve of waiters) resolve(); @@ -566,6 +613,50 @@ export class Session { } } + /** + * Flush emulator writes up to current queue position (snapshot boundary). + * Unlike flushEmulatorWrites, this captures a consistent point-in-time state + * even with continuous output - we only wait for data received BEFORE this call. + * + * The key insight: snapshotBoundaryIndex tracks how many items REMAIN that + * need to be processed. Each time we shift an item, we decrement it. + * When it reaches 0, we've processed everything up to the boundary. + */ + private async flushToSnapshotBoundary(timeoutMs: number): Promise { + // Mark the current queue length as how many items we need to process + const itemsToProcess = this.emulatorWriteQueue.length; + + if (itemsToProcess === 0 && !this.emulatorWriteScheduled) { + return true; // Already flushed + } + + // Set the boundary counter - processEmulatorWriteQueue will decrement this + this.snapshotBoundaryIndex = itemsToProcess; + + const boundaryPromise = new Promise((resolve) => { + this.snapshotBoundaryWaiters.push(resolve); + this.scheduleEmulatorWrite(); + }); + + const timeoutPromise = new Promise((resolve) => + setTimeout(resolve, timeoutMs), + ); + + await Promise.race([boundaryPromise, timeoutPromise]); + + // Check if we actually reached the boundary or timed out + const reachedBoundary = this.snapshotBoundaryIndex === null; + + // Clean up if timed out (boundary wasn't reached) + if (!reachedBoundary) { + this.snapshotBoundaryIndex = null; + // Remove our waiter from the list + this.snapshotBoundaryWaiters = []; + } + + return reachedBoundary; + } + /** * Check if session is alive (PTY running) */ @@ -602,8 +693,39 @@ export class Session { }); this.lastAttachedAt = new Date(); - // Use timeout to prevent indefinite hang with continuous output (e.g., tail -f) - await this.flushEmulatorWrites(ATTACH_FLUSH_TIMEOUT_MS); + // Use snapshot boundary flush for consistent state with continuous output. + // This ensures we capture all data received BEFORE attach was called, + // even if new data continues to arrive during the flush. + const queuedBefore = this.emulatorWriteQueuedBytes; + const queueItemsBefore = this.emulatorWriteQueue.length; + const flushStart = performance.now(); + + const reachedBoundary = await this.flushToSnapshotBoundary( + ATTACH_FLUSH_TIMEOUT_MS, + ); + + const flushTime = performance.now() - flushStart; + const queuedAfter = this.emulatorWriteQueuedBytes; + + // ALWAYS log attach for debugging + const modes = this.emulator.getModes(); + console.log( + `[Session ${this.sessionId}] ATTACH: ` + + `reachedBoundary=${reachedBoundary} ` + + `flushTime=${flushTime.toFixed(0)}ms ` + + `queueBefore=${queueItemsBefore} queueAfter=${this.emulatorWriteQueue.length} ` + + `altScreen=${modes.alternateScreen}`, + ); + + if (!reachedBoundary) { + console.warn( + `[Session ${this.sessionId}] ATTACH FLUSH TIMEOUT: ` + + `flushTime=${flushTime.toFixed(0)}ms ` + + `queueBefore=${queueItemsBefore} items (${queuedBefore} bytes) ` + + `queueAfter=${this.emulatorWriteQueue.length} items (${queuedAfter} bytes)`, + ); + } + return this.emulator.getSnapshotAsync(); } @@ -710,9 +832,13 @@ export class Session { this.emulatorWriteQueue = []; this.emulatorWriteQueuedBytes = 0; this.emulatorWriteScheduled = false; + this.snapshotBoundaryIndex = null; const waiters = this.emulatorFlushWaiters; this.emulatorFlushWaiters = []; for (const resolve of waiters) resolve(); + const boundaryWaiters = this.snapshotBoundaryWaiters; + this.snapshotBoundaryWaiters = []; + for (const resolve of boundaryWaiters) resolve(); this.emulator.dispose(); this.attachedClients.clear(); diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index a58c23e03f2..0f5a736b97e 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -47,6 +47,19 @@ type CreateOrAttachResult = { cols: number; rows: number; scrollbackLines: number; + debug?: { + xtermBufferType: string; + hasAltScreenEntry: boolean; + altBuffer?: { + lines: number; + nonEmptyLines: number; + totalChars: number; + cursorX: number; + cursorY: number; + sampleLines: string[]; + }; + normalBufferLines: number; + }; }; }; @@ -263,12 +276,24 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const flushPendingEvents = useCallback(() => { const xterm = xtermRef.current; if (!xterm) return; - if (pendingEventsRef.current.length === 0) return; + if (pendingEventsRef.current.length === 0) { + console.log( + `[Terminal][${paneId.slice(-8)}] FLUSH: no pending events time=${Date.now()}`, + ); + return; + } const events = pendingEventsRef.current.splice( 0, pendingEventsRef.current.length, ); + const totalBytes = events.reduce( + (sum, e) => sum + (e.type === "data" ? e.data.length : 0), + 0, + ); + console.log( + `[Terminal][${paneId.slice(-8)}] FLUSHING ${events.length} events (${totalBytes} bytes) time=${Date.now()}`, + ); for (const event of events) { if (event.type === "data") { @@ -352,20 +377,81 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } } - // If session was in alternate screen mode, enter it BEFORE writing content. - // rehydrateSequences intentionally excludes alternate screen mode (1049) because - // sending it after content would clear the screen. We must send it first so xterm - // knows to use the alternate buffer, then write content into it. - if (result.snapshot?.modes.alternateScreen) { - xterm.write("\x1b[?1049h"); - } - // Apply rehydration sequences to restore other terminal modes // (app cursor mode, bracketed paste, mouse tracking, etc.) if (result.snapshot?.rehydrateSequences) { xterm.write(result.snapshot.rehydrateSequences); } + // Resize xterm to match snapshot dimensions before applying content. + // The snapshot's cursor positioning assumes specific cols/rows. + const snapshotCols = result.snapshot?.cols; + const snapshotRows = result.snapshot?.rows; + if ( + snapshotCols && + snapshotRows && + (xterm.cols !== snapshotCols || xterm.rows !== snapshotRows) + ) { + xterm.resize(snapshotCols, snapshotRows); + } + + const isAltScreenReattach = + !result.isNew && result.snapshot?.modes.alternateScreen; + + // EXPERIMENTAL: For alt-screen (TUI) sessions, the serialized snapshot often + // renders incorrectly because styled spaces and positioning get lost. + // Instead of writing broken snapshot, enter alt-screen and trigger SIGWINCH + // so the TUI redraws itself via the live stream. + if (isAltScreenReattach) { + console.log( + `[Terminal][${paneId.slice(-8)}] ALT-SCREEN REATTACH: skipping snapshot, triggering SIGWINCH redraw`, + ); + + // Enter alt-screen mode so TUI output goes to correct buffer + xterm.write("\x1b[?1049h"); + + // Apply rehydration sequences for other modes (bracketed paste, etc.) + if (result.snapshot?.rehydrateSequences) { + // Filter out alt-screen sequences since we already entered + const ESC = "\x1b"; + const filteredRehydrate = result.snapshot.rehydrateSequences + .split(ESC + "[?1049h") + .join("") + .split(ESC + "[?47h") + .join(""); + if (filteredRehydrate) { + xterm.write(filteredRehydrate); + } + } + + // Enable streaming BEFORE resize so TUI output comes through + isStreamReadyRef.current = true; + flushPendingEvents(); + + // Fit xterm to container and trigger SIGWINCH + requestAnimationFrame(() => { + if (xtermRef.current !== xterm) return; + fitAddon.fit(); + + const cols = xterm.cols; + const rows = xterm.rows; + if (cols > 0 && rows > 0) { + console.log( + `[Terminal][${paneId.slice(-8)}] ALT-SCREEN SIGWINCH: ${cols}x${rows} -> ${cols}x${rows - 1} -> ${cols}x${rows}`, + ); + // Resize down then up to guarantee SIGWINCH + resizeRef.current({ paneId, cols, rows: rows - 1 }); + setTimeout(() => { + if (xtermRef.current !== xterm) return; + resizeRef.current({ paneId, cols, rows }); + }, 100); + } + }); + + updateCwdRef.current(result.scrollback); + return; // Skip normal snapshot flow + } + // xterm.write() is asynchronous - escape sequences may not be fully // processed when the terminal first renders, causing garbled display. // Force a re-render after write completes to ensure correct display. @@ -417,15 +503,16 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { if (xtermRef.current !== xterm) return; redraw(); }); + + // Enable streaming AFTER xterm has processed the snapshot. + // This prevents live PTY output from interleaving with snapshot replay. + isStreamReadyRef.current = true; + flushPendingEvents(); }); updateCwdRef.current(result.scrollback); } catch (error) { console.error("[Terminal] Restoration failed:", error); } - - // Enable streaming after initial state has been queued into xterm's write buffer. - isStreamReadyRef.current = true; - flushPendingEvents(); }, [flushPendingEvents, paneId]); const handleRetryConnection = useCallback(() => { @@ -465,6 +552,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const handleStreamData = (event: TerminalStreamEvent) => { // Queue events until terminal is ready to prevent data loss if (!xtermRef.current || !isStreamReadyRef.current) { + const dataLen = event.type === "data" ? event.data.length : 0; + console.log( + `[Terminal][${paneId.slice(-8)}] QUEUING event type=${event.type} len=${dataLen} totalQueued=${pendingEventsRef.current.length + 1} time=${Date.now()}`, + ); pendingEventsRef.current.push(event); return; } From 213f5461c1e04f3170956e59622804602b1d9b24 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Thu, 1 Jan 2026 20:55:08 +0200 Subject: [PATCH 44/51] fix(desktop): use position-based alt-screen detection in scrollback fallback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The fallback logic for detecting alternate screen mode was using presence/absence checks (includes) instead of position comparison (lastIndexOf). This caused incorrect detection when a user entered and exited alternate screen multiple times (e.g., opened vim, closed it, opened it again). Changed to use lastIndexOf comparison, matching the pattern already used in updateModesFromData and for bracketed paste detection. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 --- .../TabsContent/Terminal/Terminal.tsx | 21 +++++++++++-------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 0f5a736b97e..8a8ca1eebf9 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -356,15 +356,18 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Also parse scrollback for escape sequences in case snapshot.modes is incomplete // This handles cases where the daemon didn't track the mode but the sequences are in history if (result.scrollback) { - const hasEnterAlt = - result.scrollback.includes("\x1b[?1049h") || - result.scrollback.includes("\x1b[?47h"); - const hasExitAlt = - result.scrollback.includes("\x1b[?1049l") || - result.scrollback.includes("\x1b[?47l"); - // If we see enter without exit, we're likely in alternate screen - if (hasEnterAlt && !hasExitAlt) { - isAlternateScreenRef.current = true; + // Use lastIndexOf to find the final state - handles multiple enter/exit cycles + // (e.g., user opened vim, closed it, opened it again) + const enterAltIndex = Math.max( + result.scrollback.lastIndexOf("\x1b[?1049h"), + result.scrollback.lastIndexOf("\x1b[?47h"), + ); + const exitAltIndex = Math.max( + result.scrollback.lastIndexOf("\x1b[?1049l"), + result.scrollback.lastIndexOf("\x1b[?47l"), + ); + if (enterAltIndex !== -1 || exitAltIndex !== -1) { + isAlternateScreenRef.current = enterAltIndex > exitAltIndex; } // Bracketed paste mode can toggle during a session - use the last seen state. From 063f21d574b89f16cd4c23a0c74efddcac89daf2 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Fri, 2 Jan 2026 08:06:12 +0200 Subject: [PATCH 45/51] docs(desktop): consolidate terminal persistence technical notes Merge 3 separate documentation files into a single comprehensive reference: - TERMINAL_RENDERING_REATTACH_RESEARCH.md (research log) - 20251229-terminal-host-daemon-terminal-persistence.md (exec plan) - LARGE_PASTE_HANG_ANALYSIS.md (bug analysis) New file uses date prefix for chronological sorting. --- ...02-terminal-persistence-technical-notes.md | 239 ++++++++ .../TERMINAL_RENDERING_REATTACH_RESEARCH.md | 480 ---------------- ...rminal-host-daemon-terminal-persistence.md | 512 ------------------ docs/LARGE_PASTE_HANG_ANALYSIS.md | 60 -- 4 files changed, 239 insertions(+), 1052 deletions(-) create mode 100644 apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md delete mode 100644 apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md delete mode 100644 docs/20251229-1858-terminal-host-daemon-terminal-persistence.md delete mode 100644 docs/LARGE_PASTE_HANG_ANALYSIS.md diff --git a/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md b/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md new file mode 100644 index 00000000000..5acd30a22e4 --- /dev/null +++ b/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md @@ -0,0 +1,239 @@ +# Terminal Persistence — Technical Notes + +> **Date**: January 2026 +> **Feature**: Terminal session persistence via daemon process +> **PR**: #541 + +This document captures the technical decisions, debugging investigations, and solutions for the terminal persistence feature. It's intended for engineers who need to understand **why** certain approaches were chosen. + +--- + +## Table of Contents + +1. [Architecture Overview](#architecture-overview) +2. [TUI Restoration: Why SIGWINCH Instead of Snapshots](#tui-restoration-why-sigwinch-instead-of-snapshots) +3. [Large Paste Reliability: Subprocess Isolation + Backpressure](#large-paste-reliability-subprocess-isolation--backpressure) +4. [Renderer Notes: WebGL vs Canvas on macOS](#renderer-notes-webgl-vs-canvas-on-macos) +5. [Design Options Considered](#design-options-considered) +6. [Reference Links](#reference-links) + +--- + +## Architecture Overview + +High-level data flow: + +``` +Renderer (xterm.js in React) + ↕ TRPC stream/write calls +Electron main + ↕ Unix socket IPC +terminal-host daemon (Node.js) + ↕ stdin/stdout IPC (binary framing) +per-session PTY subprocess (Node.js + node-pty) + ↕ PTY +shell / TUI (opencode, vim, etc.) +``` + +Key concepts: + +- **Daemon owns sessions** so terminals persist across app restarts. +- **Headless emulator** in daemon maintains a model of the terminal state (screen + modes) and produces a snapshot for reattach. +- **Per-session subprocess** isolates each PTY so one terminal can't freeze others. +- **Renderer is recreated** on React mount; on "switch away" we detach and later reattach to the daemon session. + +--- + +## TUI Restoration: Why SIGWINCH Instead of Snapshots + +### The Problem + +When switching away from a terminal running a TUI (like opencode, vim, claude) and switching back, we saw visual corruption—missing ASCII art, input boxes, and UI elements. + +### Why Snapshots Don't Work for TUIs + +1. TUIs use "styled spaces" (spaces with background colors) to create UI elements +2. `SerializeAddon` captures buffer cell content, but serialization of styled empty cells is inconsistent +3. When restored, the serialized snapshot renders sparsely—missing panels, borders, and UI chrome + +**Diagnostic data showed the problem:** +``` +ALT-BUFFER: lines=52 nonEmpty=14 chars=2156 +``` +A full TUI screen (91×52 = 4732 cells) should have far more content. The alt buffer was sparse. + +### Investigation Timeline + +| # | Hypothesis | Test | Result | +|---|------------|------|--------| +| 1 | Live events interleaving with snapshot | Added logging for pending events | ❌ PENDING_EVENTS=0 | +| 2 | Double alt-screen entry | Disabled manual entry | ❌ Still corrupted | +| 3 | WebGL renderer issues | Forced Canvas renderer | ❌ Still corrupted | +| 4 | Dimension mismatch | Logged xterm vs snapshot dims | ❌ MATCH=true | +| 5 | Alt-screen buffer mismatch | Logged transition sequences | ❌ CONSISTENT=true | + +### Root Cause: Flush Timeout During Snapshot + +**Location:** `Session.attach()` in `apps/desktop/src/main/terminal-host/session.ts` + +With continuous TUI output (like OpenCode), the emulator write queue NEVER empties in the timeout window. `Promise.race()` times out, but queued data never made it to xterm before snapshot capture. + +### The Solution: Skip Snapshot, Trigger SIGWINCH + +Instead of trying to perfectly serialize and restore TUI state: + +1. **Skip writing the broken snapshot** for alt-screen (TUI) sessions +2. **Enter alt-screen mode** directly so TUI output goes to the correct buffer +3. **Enable streaming first** so live PTY output comes through +4. **Trigger SIGWINCH** via resize down/up—TUI redraws itself from scratch + +```typescript +if (isAltScreenReattach) { + xterm.write("\x1b[?1049h"); // Enter alt-screen + isStreamReadyRef.current = true; + flushPendingEvents(); + + // Trigger SIGWINCH via resize + resizeRef.current({ paneId, cols, rows: rows - 1 }); + setTimeout(() => { + resizeRef.current({ paneId, cols, rows }); + }, 100); +} +``` + +### Trade-offs + +| Aspect | Snapshot Approach | SIGWINCH Approach | +|--------|-------------------|-------------------| +| Visual continuity | Broken (sparse/corrupted) | Brief flash as TUI redraws | +| Correctness | Unreliable | Reliable (TUI owns its state) | +| Complexity | High | Low | + +**Non-TUI sessions** (normal shells) still use the snapshot approach, which works correctly for scrollback history and shell prompts. + +--- + +## Large Paste Reliability: Subprocess Isolation + Backpressure + +### The Problem + +Pasting large blocks of text (e.g. 3k+ lines) into `vi` could: +- Hang the terminal daemon / freeze all terminals, or +- Partially paste and then silently stop (missing chunks) + +Most visible on macOS (small kernel PTY buffer + very high output volume during `vi` repaints). + +### Two Distinct Failure Modes + +**1) CPU saturation on output (daemon side)** + +Large pastes cause `vi` to repaint aggressively, producing huge volumes of escape-sequence-heavy output. If the daemon tries to parse that output in large unbounded chunks, it monopolizes the event loop. + +**2) Backpressure on input (PTY write side)** + +PTY writes must respect backpressure. When writing to a PTY fd in non-blocking mode, the kernel can return `EAGAIN`/`EWOULDBLOCK`. If treated as fatal, paste chunks get dropped. + +### The Solution + +**Process isolation (per terminal)** + +Each PTY runs in its own subprocess (`pty-subprocess.ts`). One terminal hitting backpressure can't freeze the daemon or other terminals. + +**Binary framing (no JSON on hot paths)** + +Subprocess ↔ daemon communication uses length-prefixed binary framing (`pty-subprocess-ipc.ts`) to avoid JSON overhead on escape-heavy output. + +**Output batching + stdout backpressure** + +Subprocess batches PTY output (32ms cadence, 128KB max) and pauses PTY reads when `process.stdout` is backpressured. + +**Input backpressure (retry, don't drop)** + +Subprocess treats `EAGAIN`/`EWOULDBLOCK` as expected backpressure: +- Keeps queued buffers +- Retries with exponential backoff (2ms → 50ms) +- Pauses upstream when backlog exceeds high watermark + +**Daemon responsiveness (time-sliced emulator)** + +The daemon applies PTY output to the headless emulator in time-budgeted slices. + +### Debugging + +Set these env vars and restart the app: +- `SUPERSET_PTY_SUBPROCESS_DEBUG=1` — subprocess batching + PTY input backpressure logs +- `SUPERSET_TERMINAL_EMULATOR_DEBUG=1` — daemon emulator budget/overrun logs + +```bash +ps aux | rg "terminal-host|pty-subprocess" +``` + +--- + +## Renderer Notes: WebGL vs Canvas on macOS + +### The Problem + +Severe corruption/glitching when switching between terminals on macOS with `xterm-webgl`. + +### Current Approach + +- **Default to Canvas on macOS** for stability +- **WebGL on other platforms** for performance +- Allow override for testing via localStorage: + ```javascript + localStorage.setItem('terminal-renderer', 'webgl' | 'canvas' | 'dom') + localStorage.removeItem('terminal-renderer') // revert to default + ``` + +### Why Warp Feels Smoother + +Warp's architecture is GPU-first (Metal on macOS) with careful minimization of bottlenecks. That doesn't automatically mean "WebGL fixes it" inside xterm.js—in practice `xterm-webgl` has had regressions on macOS. + +--- + +## Design Options Considered + +These were evaluated during the design phase: + +### Option A — Don't detach on tab switch (keep renderer alive) + +Make tab switching purely a show/hide operation. Removes the core "reattach baseline mismatch" failure mode. + +**Pros:** Fastest path to eliminating corruption +**Cons:** More memory if many terminals open; needs hibernation policies + +### Option B — tmux-style server authoritative screen diff + +Daemon maintains full screen grid; sends diffs to clients. + +**Pros:** Robust reattach +**Cons:** Significant engineering effort; essentially building a multiplexer + +### Option C — Use tmux/screen as persistence layer + +Put tmux behind the scenes. + +**Pros:** tmux already solved this +**Cons:** External dependency; platform concerns + +### Option D — Per-terminal WebContents/BrowserView + +Host each terminal in a persistent Electron view. + +**Pros:** Avoid rehydrate for navigation +**Cons:** Complex Electron lifecycle + +### What We Chose + +For v1, we implemented a daemon with SIGWINCH-based TUI restoration. This balances correctness (TUI redraws itself) with implementation complexity. + +--- + +## Reference Links + +- [xterm.js flow control guide](https://xtermjs.org/docs/guides/flowcontrol/) — buffering, time-sliced processing +- [xterm.js issue #595](https://github.com/xtermjs/xterm.js/issues/595) — "Support saving and restoring of terminal state" +- [xterm.js VT features](https://xtermjs.org/docs/api/vtfeatures/) — supported sequences +- [xterm.js WebGL issues](https://github.com/xtermjs/xterm.js/issues/4665) — regression examples +- [How Warp Works](https://www.warp.dev/blog/how-warp-works) — GPU-first architecture diff --git a/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md b/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md deleted file mode 100644 index 951a70f7991..00000000000 --- a/apps/desktop/docs/TERMINAL_RENDERING_REATTACH_RESEARCH.md +++ /dev/null @@ -1,480 +0,0 @@ -# Terminal Rendering + Reattach Research Log (Scratchpad) - -This doc is a living scratchpad for understanding and fixing two related UX problems in Superset Desktop terminals: - -1. **TUI corruption after switching away and back** (e.g. OpenCode/vim-like apps). -2. **Jittery resizing** (especially noticeable on macOS with Canvas rendering). - -It’s written for engineers who **do not have the original investigation context**. - ---- - -## TL;DR - -- **Corruption on tab switch** is usually not “random rendering”; it’s a *reattach correctness* problem: TUIs emit **incremental** escape sequences that assume a precise current screen/mode/cursor state. If we detach/unmount the renderer and later rebuild it from a snapshot, any tiny mismatch becomes visible as corruption when the TUI continues sending incremental updates. -- **Resize jitter** is mostly a throughput problem: resizing causes frequent PTY resizes + full-screen repaints from TUIs, and xterm.js processes input in **time-sliced batches** to avoid blocking the UI thread. Under heavy output, it can’t stay at 60fps without aggressive resize coalescing and/or a GPU-first renderer. - ---- - -## Current Architecture (as implemented in this repo) - -High-level data flow: - -``` -Renderer (xterm.js in React) - ↕ TRPC stream/write calls -Electron main - ↕ Unix socket IPC -terminal-host daemon (Node.js) - ↕ stdin/stdout IPC -per-session PTY subprocess (Node.js + node-pty) - ↕ PTY -shell / TUI (opencode, vim, etc.) -``` - -Key concepts: - -- **Daemon owns sessions** so terminals persist across app restarts. -- **Headless emulator** in daemon maintains a model of the terminal state (screen + modes) and produces a snapshot for reattach. -- **Renderer is recreated** on React mount; on “switch away” we may detach/unmount and later reattach to the daemon session. - -Related docs/code: -- Large paste reliability notes: `LARGE_PASTE_HANG_ANALYSIS.md` (repo root). -- Headless emulator: `apps/desktop/src/main/lib/terminal-host/headless-emulator.ts`. -- Renderer creation / GPU renderer selection: `apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/helpers.ts`. - -Related problem area: -- **Large paste reliability** was previously a major source of hangs/dropped input. The current direction is per-PTY subprocess isolation + explicit backpressure handling (treating `EAGAIN` as retry/backoff instead of “drop”). See `LARGE_PASTE_HANG_ANALYSIS.md` for details. - ---- - -## Symptom 1: TUI corruption after switching away and back - -### What we observe - -- Happens when switching away from a terminal and then returning to it. -- Not necessarily tied to full app restart. -- Affects TUIs that are screen-oriented and repaint frequently (OpenCode is a common reproduction). - -### Why this is hard (fundamental) - -Most TUIs do **incremental drawing**: -- move cursor -- rewrite a few cells -- update a small region -- assume a specific active buffer (normal vs alternate screen) -- assume a specific mode state (cursor keys, mouse tracking, bracketed paste, etc.) - -If we “reattach” by creating a new xterm renderer and restoring the screen from a snapshot, then: -- if the snapshot is taken **mid-update** (or we rehydrate in the wrong order), -- or if any output is missed/duplicated around the detach boundary, -- or if modes differ slightly between headless model and the new renderer, - -…the next incremental updates from the TUI apply relative to the wrong baseline and appear as corruption. - -This is not unique to Superset: xterm.js itself historically describes the only reliable way to “set” terminal state via public API as **replaying the commands that produced it**, and points toward headless/serialization as a reconnection primitive. - -### Key point: persistence vs rendering - -- **Persistence feature** increases exposure because it introduces **detach/attach** as a common lifecycle event. -- The corruption itself is typically a combination of: - - **reattach semantics** (state mismatch), and sometimes - - **renderer quirks** (WebGL issues on macOS, hidden/visible transitions). - -If you never detach/unmount the renderer on tab switch, you remove the most failure-prone step. - ---- - -## Symptom 2: Resize feels jittery - -### What we observe - -- Resizing panes feels less “buttery” than modern terminals like Warp. -- Jitter is especially noticeable with TUI output in flight and when using CPU rendering (Canvas). - -### Why this happens (fundamental) - -Resizing is expensive in a terminal for two reasons: - -1) **Logical resize triggers PTY resize → TUIs repaint** -- When cols/rows change, the PTY receives a resize (SIGWINCH on Unix-like systems). -- TUIs often repaint large regions or the entire screen in response. -- That yields a burst of output (escape-sequence heavy) right while we are doing layout work. - -2) **xterm.js has limited throughput and is intentionally time-sliced** -- `term.write()` is non-blocking; xterm buffers data and processes it in chunks designed to stay under ~one frame budget (≈16ms) to avoid blocking the UI thread. -- When producers are “too fast”, the terminal gets sluggish and may stop responding to input; hence flow control/backpressure is required in high-throughput pipelines. - -So “resize jitter” often means: **we’re asking xterm to keep up with heavy output + frequent resizes** faster than it can process/render. - -### Why Warp feels smooth - -Warp’s architecture is built around a GPU-first renderer (Metal on macOS) and careful minimization of bottlenecks (PTY read/parse, render, scroll). - -That doesn’t automatically mean “WebGL fixes it” inside xterm.js; in practice `xterm-webgl` has had regressions and rendering issues, and on macOS we’ve repeatedly seen corruption when hiding/showing terminals or switching panes. - ---- - -## Renderer notes (macOS) - -### WebGL vs Canvas vs DOM - -- **WebGL**: best performance potential, but can be fragile (glyph atlas / context loss / hidden-canvas transitions). -- **Canvas**: more stable but more CPU-bound (often leads to jitter under load). -- **DOM**: typically slowest, mostly a fallback. - -xterm.js’ core rendering and addons list includes WebGL and Serialize, but they come with tradeoffs. - -Current repo approach (as of recent fixes): -- Default to **Canvas on macOS** to avoid WebGL corruption on tab switching. -- Allow overriding for testing via localStorage: - - `localStorage.setItem('terminal-renderer', 'webgl' | 'canvas' | 'dom')` - - `localStorage.removeItem('terminal-renderer')` to revert to default. - ---- - -## Why switching away/back is specifically triggering corruption - -When a terminal is unmounted/hidden and later recreated: - -- A **new xterm instance** is created. -- We restore from daemon snapshot (serialize output + “rehydrate sequences”). -- The TUI process never stopped; it keeps emitting updates based on its own internal model. - -The critical window is the detach/attach boundary: - -- If the daemon snapshot isn’t taken at a stable boundary (e.g. “frame complete”), -- or if output continues while we are capturing/restoring and we apply it in a different order, -- or if we rehydrate modes (alternate screen, cursor modes, mouse tracking, bracketed paste) in the wrong sequence, - -…the restored xterm state can be “close enough” for plain shells but not for screen-oriented TUIs. - -This aligns with how terminal state restoration is generally discussed in the ecosystem: the most robust systems keep an authoritative server-side screen model and redraw it to clients on attach (tmux-style). - ---- - -## Design Options (out-of-the-box) - -These are “shape of the system” ideas, not small bug fixes. - -### Option A — Don’t detach on tab switch (keep renderer alive) - -Make tab switching purely a show/hide operation: -- keep the xterm instance alive in memory (and ideally attached to the session) -- avoid rehydrate/snapshot on routine navigation - -Pros: -- Removes the core “reattach baseline mismatch” failure mode. -- Likely the fastest path to eliminating OpenCode corruption on switch-back. - -Cons: -- More memory/CPU if many terminals are open. -- Might need policies (e.g. keep last N terminals “hot”; hibernate older ones). - -### Option B — tmux-style server authoritative screen diff - -Make the daemon the “truth” for terminal UI: -- daemon maintains the full screen grid and cursor/mode state -- on attach: send full state (grid + modes) -- during run: send diffs/updates to clients - -Pros: -- Reattach becomes robust (clients can come/go without state mismatch). -- Matches how tmux achieves persistence. - -Cons: -- Significant engineering effort: you’re effectively building a multiplexer protocol. -- Must ensure your screen model matches what the client renders (font metrics, wrapping, etc.). - -### Option C — Use tmux/screen as the persistence layer - -Put tmux behind the scenes: -- daemon starts tmux, each terminal is a tmux pane -- renderer is a normal terminal client - -Pros: -- tmux already solved “detach/reattach with a stable screen model”. -- Avoids inventing a custom diff protocol. - -Cons: -- External dependency and platform concerns. -- Integrating with our UX/workspace model could be awkward. - -### Option D — Per-terminal WebContents / BrowserView “view host” - -Instead of recreating terminals in React, host each terminal view in a persistent Electron view: -- switch visibility at the compositor level - -Pros: -- Avoid rehydrate for navigation. -- Strong isolation between terminal views. - -Cons: -- More complex Electron lifecycle; resource usage can rise. - -### Option E — Own the renderer (Warp/WezTerm direction) - -Long-term: a native/GPU-first terminal renderer and more control over resizing. - -Pros: -- Best chance at “buttery” resize + fewer corruption classes. -- Warp shows the ceiling when you own the rendering pipeline. - -Cons: -- Very large scope; essentially building a terminal engine inside the app. - ---- - -## Practical experiment ideas (near-term) - -These are experiments that can confirm root causes quickly: - -1) **Keep renderer alive on tab switch** (no detach/reattach) and see if OpenCode corruption disappears. -2) **Coalesce resizes**: - - “visual resize” during drag (scale), only “logical resize” (PTY cols/rows) on settle. - - lower-frequency resize dispatch (debounce/throttle) to reduce repaint storms. -3) **Force TUI redraw on attach**: - - e.g. synthetic resize nudge or sending a reset sequence (careful: many resets have side effects). - - This is a mitigation, not a root fix. -4) **Instrument attach boundary**: - - capture sequence numbers: last byte processed in emulator vs first byte delivered to client after attach - - detect and log gaps/duplication - - confirm mode parity (alternate screen, bracketed paste, mouse modes) - ---- - -## Investigation Log (January 2026) - -### Observed Corruption - -When switching workspaces with OpenCode running, the restored terminal shows **missing content**: -- The "opencode" ASCII art logo is completely missing -- The "Ask anything..." input box is missing -- Only partial UI elements remain (agent name, status bar) -- Cursor position is wrong (middle of screen instead of input area) - -This is NOT garbled characters or wrong colors—it's **missing screen regions**, suggesting the snapshot content is incomplete or truncated. - -### Hypotheses Tested and Ruled Out - -| # | Hypothesis | Test | Result | -|---|------------|------|--------| -| 1 | **Live events interleaving with snapshot** - Events arrive before snapshot is applied | Added logging: `PENDING_EVENTS` count at snapshot time | ❌ PENDING_EVENTS=0 in all cases | -| 2 | **Double alt-screen entry** - Manual `\x1b[?1049h` + scrollback's copy | Disabled manual entry, logged if scrollback contains it | ❌ Still corrupted with manual entry disabled | -| 3 | **WebGL renderer issues** - Glyph atlas corruption | Forced Canvas renderer via localStorage | ❌ Still corrupted with Canvas | -| 4 | **Dimension mismatch** - Snapshot written at wrong cols/rows | Logged xterm vs snapshot dimensions | ❌ MATCH=true (106x60 = 106x60) | -| 5 | **Alt-screen buffer mismatch** - modes.altScreen disagrees with scrollback's last transition | Logged lastIndexOf for enter/exit sequences | ❌ CONSISTENT=true | - -### Key Observations from Logs - -``` -APPLYING SNAPSHOT: scrollback=8247 rehydrate=48 altScreen=true PENDING_EVENTS=0 -ALT-SCREEN CHECK: modes.altScreen=true scrollbackHasAlt=true -ALT-SCREEN TRANSITION: lastEnterIdx=275 lastExitIdx=-1 lastTransition=ENTER CONSISTENT=true -DIMENSION CHECK: xterm=106x60 snapshot=106x60 MATCH=true -``` - -- Dimensions match perfectly -- Alt-screen mode is consistent between daemon and scrollback -- No pending events at snapshot time -- rehydrateSequences is only 48 bytes (may be too small for full TUI state?) - -### Remaining Hypotheses (Not Yet Tested) - -1. **Flush timeout during snapshot** - Daemon's `flushEmulatorWrites()` times out under heavy output, capturing incomplete screen state - -2. **Snapshot content is incomplete/stale** - The headless emulator isn't capturing the full screen buffer correctly for alternate screen TUIs - -3. **Missing TUI state in rehydrateSequences** - 48 bytes may not cover all modes TUIs need (scroll region, saved cursor, character sets, etc.) - -4. **Cursor position not in snapshot** - TUI assumes cursor is in input area, but we're not restoring cursor position - -### Next Steps - -1. **Investigate daemon-side snapshot generation** (`headless-emulator.ts`) - - Is the alternate screen buffer being serialized correctly? - - Is cursor position included in the snapshot? - - Does flush timeout occur during capture? - -2. **Log actual snapshot content** - Inspect first/last bytes to see if content is truncated - -3. **Compare headless emulator state vs actual screen** - Hash comparison to detect discrepancies - -### Code Changes Made During Investigation - -Added diagnostic logging to `Terminal.tsx`: -- `APPLYING SNAPSHOT` - scrollback size, rehydrate size, alt screen mode, pending events -- `ALT-SCREEN CHECK` - whether scrollback/rehydrate contain alt-screen sequences -- `ALT-SCREEN TRANSITION` - which transition (enter/exit) came last, consistency check -- `DIMENSION CHECK` - xterm cols/rows vs snapshot cols/rows -- `QUEUING/FLUSHING` - event timing during reattach - -These logs can be removed once the root cause is found. - ---- - -## ROOT CAUSE IDENTIFIED & FIX IMPLEMENTED (January 2026) - -### The Bug: Flush Timeout During Snapshot - -**Location:** `Session.attach()` in `apps/desktop/src/main/terminal-host/session.ts` - -**The Problem Flow:** - -``` -1. User switches tabs, triggering attach() -2. attach() calls flushEmulatorWrites(500ms) to process pending PTY output -3. With continuous TUI output (like OpenCode), the queue NEVER empties in 500ms -4. Promise.race() times out, but emulatorWriteQueue still has unprocessed data -5. attach() immediately calls getSnapshotAsync() -6. Snapshot captures INCOMPLETE state - queued data never made it to xterm! -``` - -**The Data Flow:** -``` -PTY → Session.emulatorWriteQueue → HeadlessEmulator.terminal (xterm) → snapshot - ↑ - STUCK HERE if timeout -``` - -**Why Previous Tests Missed This:** -- Renderer-side logs showed `PENDING_EVENTS=0` - but that's the RENDERER's queue -- The DAEMON's `emulatorWriteQueue` was the culprit -- The bug is invisible from the renderer's perspective - -### The Fix: Snapshot Boundary Tracking - -Instead of waiting for the entire queue to empty (impossible with continuous output), we now: - -1. **Mark a "snapshot boundary"** when attach() is called (current queue length) -2. **Decrement the counter** as items are processed -3. **Resolve when boundary reached** (processed all pre-attach data) -4. **Ignore post-attach data** for snapshot purposes (it will be streamed live) - -**Key Changes:** - -```typescript -// session.ts - New state tracking -private snapshotBoundaryIndex: number | null = null; -private snapshotBoundaryWaiters: Array<() => void> = []; - -// New method: flushToSnapshotBoundary(timeoutMs) -// - Sets boundary = queue.length at call time -// - Waits for that many items to be processed -// - Guarantees consistent point-in-time snapshot - -// attach() now uses: -const reachedBoundary = await this.flushToSnapshotBoundary(ATTACH_FLUSH_TIMEOUT_MS); -// Instead of: -await this.flushEmulatorWrites(ATTACH_FLUSH_TIMEOUT_MS); // OLD - broken -``` - -### Why This Fix Works - -- With continuous output, new data keeps arriving AFTER attach() is called -- We only care about data received BEFORE attach - that's what defines our snapshot point -- By counting items instead of waiting for empty, we get a consistent snapshot -- Post-attach data streams live to the renderer (normal operation) - -### Logging Added for Verification - -**Daemon-side (`session.ts`):** -``` -[Session X] ATTACH FLUSH OK: flushTime=123ms processed=42 items (8192 bytes) -[Session X] ATTACH FLUSH TIMEOUT: flushTime=500ms queueBefore=100 queueAfter=75 -``` - -**Headless emulator (`headless-emulator.ts`):** -``` -[HeadlessEmulator] SNAPSHOT: altScreen=true snapshotSize=12345 rehydrateSize=48 cols=106 rows=60 -``` - -### Testing Needed - -1. Run OpenCode in a terminal -2. Switch to a different workspace tab -3. Switch back -4. Verify: ASCII art logo and input box should now be visible -5. Check logs for "ATTACH FLUSH OK" instead of "ATTACH FLUSH TIMEOUT" - ---- - -## FINAL FIX: SIGWINCH-Based TUI Redraw (January 2026) - -### Why Snapshots Don't Work for TUIs - -After implementing the snapshot boundary fix above, we discovered a **deeper issue**: even with correct snapshots, TUI rendering was still broken. - -**The Problem:** - -1. TUIs use "styled spaces" (spaces with background colors) to create UI elements -2. SerializeAddon captures buffer cell content, but serialization of styled empty cells is inconsistent -3. When restored, the serialized snapshot renders sparsely—missing panels, borders, and UI chrome - -**Diagnostic Data:** -``` -ALT-BUFFER: lines=52 nonEmpty=14 chars=2156 -``` -A full TUI screen (91×52 = 4732 cells) should have far more content. The alt buffer was sparse. - -### The Solution: Skip Snapshot, Trigger SIGWINCH - -Instead of trying to perfectly serialize and restore TUI state, we now: - -1. **Skip writing the broken snapshot** for alt-screen (TUI) sessions -2. **Enter alt-screen mode** directly so TUI output goes to the correct buffer -3. **Enable streaming first** so live PTY output comes through -4. **Trigger SIGWINCH** via resize down/up—TUI redraws itself from scratch - -**Key Code (Terminal.tsx):** -```typescript -if (isAltScreenReattach) { - // Enter alt-screen mode - xterm.write("\x1b[?1049h"); - - // Apply non-alt-screen rehydration sequences - if (result.snapshot?.rehydrateSequences) { ... } - - // Enable streaming BEFORE resize - isStreamReadyRef.current = true; - flushPendingEvents(); - - // Trigger SIGWINCH - resizeRef.current({ paneId, cols, rows: rows - 1 }); - setTimeout(() => { - resizeRef.current({ paneId, cols, rows }); - }, 100); - - return; // Skip normal snapshot flow -} -``` - -### Trade-offs - -| Aspect | Before (Snapshot) | After (SIGWINCH) | -|--------|-------------------|------------------| -| Visual continuity | Broken (sparse/corrupted) | Brief flash as TUI redraws | -| Correctness | Unreliable | Reliable (TUI owns its state) | -| Complexity | High (serialize/deserialize TUI state) | Low (let TUI handle it) | -| Performance | Single write of serialized data | TUI full repaint via stream | - -### Why This Works - -- TUIs maintain their own internal state and can redraw on SIGWINCH -- We're not trying to perfectly capture a moving target (incremental TUI updates) -- The TUI is the authority on its own display—we just trigger a refresh - -### Non-TUI Sessions Unchanged - -Normal shell sessions (not in alternate screen mode) still use the snapshot approach, which works correctly for scrollback history and shell prompts. - ---- - -## Reference links - -- xterm.js flow control guide (buffering, time-sliced processing, throughput limits): https://xtermjs.org/docs/guides/flowcontrol/ -- xterm.js issue: “Support saving and restoring of terminal state” (headless + “replay commands” framing): https://github.com/xtermjs/xterm.js/issues/595 -- xterm.js supported terminal sequences (what is/ isn’t supported): https://xtermjs.org/docs/api/vtfeatures/ -- xterm.js WebGL regression example: https://github.com/xtermjs/xterm.js/issues/4665 -- tmux client/server architecture overview (high level): https://www.augmentcode.com/open-source/tmux/tmux -- Warp “How Warp Works” (GPU-first and performance bottlenecks): https://www.warp.dev/blog/how-warp-works diff --git a/docs/20251229-1858-terminal-host-daemon-terminal-persistence.md b/docs/20251229-1858-terminal-host-daemon-terminal-persistence.md deleted file mode 100644 index f3297f4ee3e..00000000000 --- a/docs/20251229-1858-terminal-host-daemon-terminal-persistence.md +++ /dev/null @@ -1,512 +0,0 @@ -# Terminal persistence via Superset-owned terminal host daemon (Desktop) - -This ExecPlan is a living document. The sections `Progress`, `Surprises & Discoveries`, `Decision Log`, and `Outcomes & Retrospective` must be kept up to date as work proceeds. - -No `PLANS.md` file was found in this repository at the time of writing. Follow the ExecPlan template requirements embedded in the prompt for structure, idempotence, and validation. - -## Purpose / Big Picture - -After this change, a Superset Desktop user can enable “terminal session persistence” and then: - -1. Open a terminal pane and start a long-running terminal UI (a “TUI”, e.g. `vim`, `htop`, `opencode`, `less`). -2. Quit Superset Desktop (including via auto-update install flow). -3. Reopen Superset Desktop and see the terminal come back exactly as it was (“perfect resume”): the screen contents match, the cursor/modes match, and interactive input works immediately (arrow keys, mouse, bracketed paste, etc.). -4. While the app was closed, the terminal continued running and its output was captured; reopening shows the up-to-date TUI state and recent scrollback. - -The key implementation change is introducing a long-lived background “terminal host” process (a daemon) that owns the PTYs and maintains terminal emulation state while the Electron app is closed. The Electron main process becomes a client of this daemon and continues to expose the same TRPC terminal interface to the renderer. - -## Assumptions - -1. This work targets `origin/main` and will be implemented on a new branch created from `origin/main` (e.g. `feat/terminal-host-daemon`). -2. macOS is the primary supported platform today; Linux is secondary. Windows support is explicitly deferred but must be feasible with the chosen abstractions. -3. The project continues to use `node-pty` as the PTY implementation for macOS/Linux (current dependency in `apps/desktop/package.json`). -4. The renderer continues to use xterm.js (`@xterm/xterm`) as the visible terminal UI (current implementation under `apps/desktop/src/renderer/.../Terminal`). -5. “Survive app updates” means: installing an update (on macOS via `electron-updater`) does not kill terminal sessions; a newly-launched updated app can attach to the already-running sessions. -6. “Perfect TUI resume” is interpreted strictly: the user should not need to “press a key to redraw” or rely on application-specific repaint behavior; the terminal state must be restored deterministically from the daemon-maintained emulator state. - -If any assumption is wrong, record the correction in `Decision Log` and update all impacted sections. - -## Open Questions - -**All questions resolved.** See Decision Log for details. - -1. ~~Persistence default and UX~~ → **RESOLVED**: Opt-in setting in Behaviors page, default off. -2. ~~Update/version skew policy~~ → **RESOLVED**: (A) Old daemon continues; additive protocol changes only. -3. ~~Output retention bounds~~ → **RESOLVED**: Configurable settings; defaults 10k lines + 4 MB disk per session. -4. ~~Multi-window semantics~~ → **RESOLVED**: Not applicable; single client per session. -5. ~~Security posture~~ → **RESOLVED**: User-only socket + token file. -6. ~~"Perfect resume" acceptance set~~ → **RESOLVED**: Test opencode, claude code, codex. - -## Progress - -- [x] (2025-12-29 18:58 local) Create new branch from `origin/main` and add this ExecPlan. -- [x] (2025-12-29 19:30 local) Implement prototyping harness for headless emulation + snapshot round-trip. **Milestone 1 complete** - 29 tests pass. -- [x] (2025-12-29 19:45 local) Implement daemon entrypoint and IPC framing. **Milestone 2 complete** - 6 tests pass. - - Created daemon entrypoint at `apps/desktop/src/main/terminal-host/index.ts` - - Updated `electron.vite.config.ts` to build daemon as separate bundle - - Implemented NDJSON protocol over Unix domain socket - - Implemented token-based authentication - - All hello/auth tests passing -- [x] (2025-12-29 20:00 local) Implement daemon session manager (PTY + headless emulator + capture). **Milestone 3 substantially complete** - 9 tests pass, 4 skipped (PTY tests). - - Created `Session` class with PTY + HeadlessEmulator integration - - Created `TerminalHost` class for session lifecycle management - - Implemented all IPC handlers (createOrAttach, write, resize, detach, kill, killAll, listSessions, clearScrollback) - - Data/exit event streaming to attached clients implemented - - Note: Some integration tests skipped due to bun/node-pty compatibility issue (see Surprises) - - Output capture to disk (ring buffer) deferred to later milestone -- [x] (2025-12-29 19:30 local) Integrate daemon client into Electron main process and preserve existing TRPC API. **Milestone 4 substantially complete**. - - Created `TerminalHostClient` at `apps/desktop/src/main/lib/terminal-host/client.ts` - - Manages connection to daemon socket - - Spawns daemon if not running (detached process with ELECTRON_RUN_AS_NODE=1) - - Handles authentication and request/response framing - - Forwards data/exit events via EventEmitter - - Created `DaemonTerminalManager` at `apps/desktop/src/main/lib/terminal/daemon-manager.ts` - - Same interface as original `TerminalManager` - - Delegates all operations to `TerminalHostClient` - - Maintains EventEmitter compatibility for TRPC subscriptions - - Updated `apps/desktop/src/main/lib/terminal/index.ts` - - Added `getActiveTerminalManager()` function - - Controlled by `SUPERSET_TERMINAL_DAEMON=1` env var for testing - - Updated TRPC terminal router to: - - Use `getActiveTerminalManager()` for manager selection - - Return snapshot payload in `createOrAttach` response - - Build passes, tests pass (362 pass, 4 skip, 1 fail - pre-existing) - - Note: Manual testing pending - set `SUPERSET_TERMINAL_DAEMON=1` and run `bun dev` -- [ ] Update renderer terminal to apply daemon snapshot + mode rehydration before streaming. -- [ ] Add persistence setting + quit/update behavior changes; add "Stop background sessions" control. -- [ ] Add tests + manual acceptance checklist; document known limitations and recovery steps. -- [ ] Fill in Outcomes & Retrospective; move plan to `.agents/plans/done/` when PR is created. - -## Surprises & Discoveries - -- **bun/node-pty test compatibility issue** (2025-12-29): When running integration tests with real PTYs via bun, there's an internal node-pty error: `this._socket.write is not a function`. This affects PTY write operations in the test environment. The existing TerminalManager tests work around this by mocking node-pty entirely. For the daemon, we've skipped the PTY-dependent integration tests and will rely on manual testing until this is resolved. The core daemon infrastructure (socket, auth, NDJSON protocol) is fully tested. - -## Decision Log - -Add entries here as decisions are made and questions are resolved. - -- **Decision (Q1): Persistence default and UX** — RESOLVED - Setting added to Behaviors settings page with default **off**. - Rationale: Lower risk for v1; users consciously opt-in to background daemon behavior. Can flip to default-on in future release once confidence is high. - Date: 2025-12-29. - -- **Decision (Q2): Update/version skew policy** — RESOLVED - **(A) Old daemon continues running** when app updates. New app speaks old protocol. - Protocol changes must be additive-only. If breaking change required, bump `protocolVersion` and show user prompt to restart terminals. - Rationale: The whole point of persistence is surviving app restarts — updates are the primary restart trigger. - Date: 2025-12-29. - -- **Decision (Q3): Output retention bounds** — RESOLVED - Configurable via Behaviors settings page. Defaults: - - Emulator scrollback: **10,000 lines** (range: 1k–100k) - - Disk ring buffer: **4 MB per session** (range: 1–32 MB) - Rationale: Users may have 100+ terminals; conservative defaults (100 sessions × 4 MB = 400 MB disk) prevent resource exhaustion. Power users can increase via settings. - Date: 2025-12-29. - -- **Decision (Q4): Multi-window attach semantics** — RESOLVED - **Not applicable.** The same terminal pane cannot be visible in multiple windows simultaneously due to app architecture. Implementation assumes single attached client per session — no fanout logic needed. - Rationale: Simplifies protocol and eliminates race conditions. - Date: 2025-12-29. - -- **Decision (Q5): Security posture** — RESOLVED - **User-only socket + token file** is sufficient. - - `SUPERSET_HOME_DIR` created with mode `0700` - - Socket at `~/.superset/terminal-host.sock` inherits directory permissions - - Token file at `~/.superset/terminal-host.token` with mode `0600` - - Token is 32+ bytes from `crypto.randomBytes`, hex-encoded - - Token validated on every `hello` request - Rationale: Local-only threat model; if attacker has same-user access, they can already kill the daemon or read process memory. Token prevents accidental cross-user access. - Date: 2025-12-29. - -- **Decision (Q6): "Perfect resume" acceptance set** — RESOLVED - Test the following AI coding agents (primary use case for Superset users): - - **opencode** - - **claude code** (Anthropic's Claude CLI) - - **codex** (OpenAI Codex CLI) - These stress long-running sessions, bracketed paste, and complex terminal modes — the exact workflows being optimized. - Date: 2025-12-29. - -## Outcomes & Retrospective - -(to be filled as milestones complete) - -## Context and Orientation - -This repository is a Bun + Turborepo monorepo. The Superset Desktop app lives under `apps/desktop/` and is built with Electron + `electron-vite`. - -In Desktop, there are three relevant runtime “sides”: - -1. Main process (Node.js/Electron environment): `apps/desktop/src/main/` - This can use Node.js modules and is responsible for creating BrowserWindows, running the local SQLite DB, managing terminals, etc. -2. Renderer process (browser environment): `apps/desktop/src/renderer/` - This cannot import Node.js modules. It renders the UI and hosts xterm.js terminal UI components. -3. Shared modules: `apps/desktop/src/shared/` - These must not import Node.js modules; they’re used by both main and renderer. - -Today’s terminal architecture (before this change): - -1. Renderer terminal UI: `apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx` - - Creates a visible xterm.js instance. - - Calls TRPC mutations to create/attach a session, write input, resize, detach, clear scrollback. - - Subscribes to a TRPC stream of terminal output events. -2. TRPC terminal router: `apps/desktop/src/lib/trpc/routers/terminal/terminal.ts` - - Exposes `createOrAttach`, `write`, `resize`, `kill`, `detach`, `clearScrollback`, and `stream`. - - Delegates to `terminalManager` in the main process. -3. TerminalManager: `apps/desktop/src/main/lib/terminal/manager.ts` - - Owns `node-pty` processes in-memory and emits `data:` and `exit:` events. - - On app quit, the main process calls `terminalManager.cleanup()` from `apps/desktop/src/main/index.ts`, killing PTYs. -4. Terminal history: `apps/desktop/src/main/lib/terminal-history.ts` - - Writes scrollback to disk under `~/.superset*/terminal-history/...` for recovery within a running app session. - -Why this is insufficient for persistence: - -- A PTY session cannot be “reattached” after the owning process exits. Today, the Electron main process owns the PTYs, so quitting the app necessarily kills sessions. - -New architecture required: - -- Introduce a persistent background process that owns PTYs and the “terminal emulator state” so sessions outlive app restarts and TUIs remain correct even when the renderer is closed. - -Terminology used in this plan (definitions): - -- PTY (pseudo-terminal): the OS interface that lets us run a shell/program as if it’s connected to a terminal. `node-pty` provides a cross-platform-ish API to spawn PTYs. -- TUI: a text-based interactive UI that relies on terminal modes, cursor addressing, alternate screen buffers, mouse tracking, etc. -- Terminal emulator: software that interprets control sequences (ANSI/VT) to maintain a screen buffer and state. xterm.js is one. -- Daemon (terminal host): a background process that continues running after the Electron app exits. -- Snapshot/rehydration: the daemon provides enough information (screen contents + mode state) for the renderer to recreate the exact terminal state on attach. - -## Plan of Work - -This work is intentionally milestone-driven. Each milestone must leave the repository in a runnable/testable state and must be independently verifiable. Do not attempt to “big bang” the whole daemon + UI rewrite in one pass. - -### Milestone 1: Prototyping spike — prove “perfect resume” is achievable - -Goal: demonstrate, in code checked into this repo, that we can: - -1. Feed terminal output into a headless terminal emulator (in Node), keep it running while no UI exists, and -2. Produce a snapshot that can be applied to a fresh xterm.js instance such that interactive input behavior matches (application cursor keys, bracketed paste, mouse tracking). - -Work to do: - -1. Add a prototyping script + tests under `apps/desktop/src/main/lib/terminal-host/prototype/`: - - `apps/desktop/src/main/lib/terminal-host/prototype/headless-roundtrip.test.ts` - - The test should: - - Create a headless emulator instance. - - Apply a sequence of terminal bytes that: - - Enters alternate screen, draws a screen, moves cursor. - - Enables application cursor keys (`CSI ? 1 h`) and bracketed paste (`CSI ? 2004 h`). - - Enables mouse mode (choose one: `CSI ? 1000 h` and SGR `CSI ? 1006 h`). - - Produce a snapshot payload: `{ snapshotAnsi: string, modes: {...} }`. - - Apply it into a fresh xterm.js instance in Node (or a second headless instance) and assert: - - The visible buffer text matches expected lines. - - The emulator’s mode flags are consistent (for flags we explicitly track). -2. Dependency choice: - - Add `@xterm/headless` to `apps/desktop/package.json` (used only in main/daemon code). - - Reuse `@xterm/addon-serialize` (already present) for snapshot generation. -3. Decide “source of truth” for query responses: - - While *no renderer client is attached*, the daemon must send xterm-generated query responses back to the PTY. - - While *a renderer client is attached*, the renderer continues sending xterm’s `onData` to backend (as today), and the daemon must not double-respond. - -Exit criteria / proof: - -- `cd apps/desktop && bun test` includes the new headless round-trip test and it passes. - -If the spike fails (serialize cannot rehydrate required state), update this ExecPlan with a pivot: track mode state explicitly and reapply via control sequences on attach, even if the snapshot only contains screen text. - -### Milestone 2: Add a terminal host daemon entrypoint and IPC framing - -Goal: add a runnable daemon process that can start, accept a connection, and respond to a `hello` request. No PTYs yet. - -Work to do: - -1. Create a new daemon entrypoint: - - `apps/desktop/src/main/terminal-host/index.ts` - This file is executed in a Node context (via Electron with `ELECTRON_RUN_AS_NODE=1`) and must not import any renderer/shared browser-only modules. -2. Update build configuration to produce the daemon bundle: - - In `apps/desktop/electron.vite.config.ts`, add an additional Rollup input for the main build so `dist/main/terminal-host.js` is built alongside `dist/main/index.js`. -3. Implement IPC message framing: - - Use a newline-delimited JSON protocol (NDJSON) over a local socket: - - request: `{ id: string, type: string, payload: object }` - - response: `{ id: string, ok: true, payload: object }` or `{ id: string, ok: false, error: { code: string, message: string } }` - - events: `{ type: "event", event: string, payload: object }` - - This keeps early prototypes simple and debuggable. -4. Socket location: - - macOS/Linux: Unix domain socket at `join(SUPERSET_HOME_DIR, "terminal-host.sock")`. - - Ensure permissions by relying on existing `SUPERSET_HOME_DIR` mode `0700` (created by local-db initialization). If that’s not guaranteed early enough, explicitly `mkdir/chmod` within daemon. -5. Auth token: - - Generate a random token on first run and write to `join(SUPERSET_HOME_DIR, "terminal-host.token")` with `0600`. - - Require the client to send it in `hello`. - -Exit criteria / proof: - -- A small Node script in main can connect and get a valid `hello` response. - -### Milestone 3: Daemon session manager (PTY + headless emulator + capture) - -Goal: daemon can create sessions (spawn PTY), keep them running when no clients are attached, continuously capture output to disk, and provide attach snapshots. - -Work to do: - -1. Define daemon session identity and lifecycle: - - Session ID should be stable across restarts and updates. Use `workspaceId` + `paneId` from existing TRPC inputs. - - Store per-session metadata (cwd, createdAt, lastAttachedAt, cols/rows). -2. Implement a `TerminalHost` in `apps/desktop/src/main/lib/terminal-host/`: - - `TerminalHost` holds a `Map`. - - Each `Session` owns: - - the `node-pty` process - - a headless xterm instance (“emulator of record”) - - a bounded on-disk log (ring buffer) and minimal metadata file - - a set of currently attached clients (0 or more) and their stream subscriptions -3. Emulator responsibilities: - - All PTY output is fed into the headless emulator to maintain state. - - The headless emulator’s `onData` is treated as “terminal-generated responses”. - - If `attachedClients === 0`: write these responses to the PTY (so TUIs keep functioning while app closed). - - If `attachedClients > 0`: do not write (renderer is responsible; avoids duplicate responses). -4. Snapshot API: - - `attach(sessionId, cols, rows)` returns: - - `snapshotAnsi`: serialized screen state string suitable to `xterm.write()`. - - `rehydrateSequences`: a small set of control sequences to restore input-affecting modes (application cursor keys, bracketed paste, mouse reporting, focus reporting, alt-screen, cursor visibility). - - `cwd` (best-effort, derived from OSC-7 parsing in output; see note below). - - `meta` including `attachedAt`, `cols/rows`. - - The daemon must keep mode state explicitly (don’t rely on private xterm internals). - - Track DECSET/DECRST `CSI ? Pm h/l` for the specific mode numbers needed. -5. CWD tracking: - - Move OSC-7 parsing to a shared module under `apps/desktop/src/shared/parse-cwd.ts` (no Node imports). - - The daemon parses PTY output stream to update `session.cwd`. -6. Output capture while closed: - - Write the raw output stream (post-clear-filtering if desired) to a bounded file (ring). - - Also keep emulator scrollback bounded via xterm options. - -Exit criteria / proof: - -- Manual: start daemon, create session, run a TUI, detach client (simulate by closing app window), confirm process continues and output grows in ring file, then reattach and see correct screen. -- Automated: add at least one integration-style test that spawns a short-lived PTY program that uses alternate screen + cursor movement and validate snapshot round-trip. - -### Milestone 4: Electron main integration (client + TRPC compatibility) - -Goal: keep the renderer’s TRPC interface mostly unchanged, but route terminal operations through the daemon instead of owning PTYs in-process. - -Work to do: - -1. Add a `TerminalHostClient` in main: - - `apps/desktop/src/main/lib/terminal-host/client.ts` - - Responsibilities: - - Ensure daemon is running (start if not). - - Maintain a connection pool (or single connection) and reconnect logic. - - Expose typed methods: `createOrAttach`, `write`, `resize`, `detach`, `kill`, `clearScrollback`, `subscribe`. -2. Start/ensure daemon: - - Spawn detached `process.execPath` with `ELECTRON_RUN_AS_NODE=1` and script path pointing at `dist/main/terminal-host.js`. - - In dev, use the built script path in the workspace; in prod, resolve via `app.getAppPath()` + `dist/main/terminal-host.js` equivalent. -3. Preserve `terminalManager` interface: - - Refactor `apps/desktop/src/main/lib/terminal/manager.ts` into a thin adapter that: - - keeps the existing EventEmitter (`data:`, `exit:`) - - delegates operations to `TerminalHostClient` - - no longer spawns `node-pty` directly (that code moves into daemon). -4. Update TRPC router: - - `apps/desktop/src/lib/trpc/routers/terminal/terminal.ts` should continue to work with the same calls, but `createOrAttach` must return the daemon snapshot payload. - - Add a backwards-compatible response shape by adding optional fields rather than breaking existing ones, then migrate renderer. - -Exit criteria / proof: - -- `bun dev` for Desktop works; opening a terminal shows output; basic typing works. - -### Milestone 5: Renderer rehydration path (snapshot + mode restore + streaming) - -Goal: on attach, the renderer restores a perfect terminal state before streaming live output. - -Work to do: - -1. Update `apps/desktop/src/renderer/.../Terminal/Terminal.tsx`: - - Replace “write `result.scrollback`” with: - - apply `result.rehydrateSequences` first (these are control sequences that update xterm mode state) - - apply `result.snapshotAnsi` next - - only then enable subscription consumption (`subscriptionEnabled = true`) and flush queued events. -2. Ensure user input is sent unchanged: - - Keep using `xterm.onData` and send to backend via TRPC `write`. - - This includes query responses; daemon must ignore responses while attached (per Milestone 3). -3. Handle resize: - - On resize, send `resize` to daemon; daemon resizes PTY and also updates emulator dimensions. -4. Recovery UI: - - If attach fails due to daemon mismatch or missing session, show a small UI affordance: - - “Session ended” (if PTY exited) - - “Restart terminal” (creates new session) - -Exit criteria / proof: - -- Manual acceptance: pick a TUI, quit app, reopen, resume and immediately interact with correct behavior. - -### Milestone 6: Persistence setting + quit/update behavior + “stop daemon” control - -Goal: make persistence user-controlled, safe by default, and compatible with auto-update install flow. - -Work to do: - -1. Local DB settings: - - Add to local DB schema (`packages/local-db/src/schema/schema.ts`): - - `terminalPersistenceEnabled` boolean (default: false) - - `terminalScrollbackLines` integer (default: 10000, range: 1000–100000) - - `terminalDiskBufferMb` integer (default: 4, range: 1–32) - - Expose via settings TRPC router (`apps/desktop/src/lib/trpc/routers/settings/index.ts`) with optimistic UI patterns consistent with existing settings. -2. Behavior settings UI: - - Add under behavior settings in the renderer: - - Toggle: "Enable terminal persistence" (default off) — Keep terminal sessions alive when Superset is closed - - Number input: "Scrollback lines" (default 10000) — Lines of history kept per terminal - - Number input: "Disk buffer per terminal" (default 4 MB) — Output captured while app is closed - - Add an explicit button: "Stop background terminal sessions": - - Calls daemon `killAll` and stops daemon (or marks it idle and allows exit). -3. App quit behavior: - - When persistence is enabled, do not kill sessions on quit. The app should simply detach/disconnect. - - When persistence is disabled, keep the current behavior (cleanup kills PTYs). -4. Auto-update install behavior: - - Ensure the “install update” path does not kill sessions even if it triggers a forced quit. - -Exit criteria / proof: - -- Toggle on → sessions survive quit/reopen. -- Toggle off → quitting kills sessions (existing behavior). -- Update install flow (manual) does not kill sessions. - -### Milestone 7: Hardening, tests, and future-proofing (Windows) - -Goal: reduce operational risk and lay groundwork for Windows. - -Work to do: - -1. Orphan cleanup: - - On app start, compare current panes (from app state) with daemon sessions; kill sessions not referenced after a grace period. -2. Crash recovery: - - If daemon crashes, main should detect and show “sessions lost; restart terminal” rather than hanging. -3. Protocol compatibility: - - Establish a stable protocol version (`protocolVersion: 1`) and enforce additive changes only. - - Add a compatibility test that simulates missing optional fields. -4. Windows groundwork (no implementation yet): - - Abstract socket path selection so future named pipe support can be plugged in without rewriting the daemon. - - Identify the Windows-specific risks (ConPTY differences, process detachment semantics) and document them in-code. - -Exit criteria / proof: - -- `cd apps/desktop && bun test` passes. -- Manual acceptance checklist completed and recorded in PR description (not in this ExecPlan). - -## Concrete Steps - -All commands are from repo root unless stated otherwise. - -1. Create work branch: - - - `cd /Users/andreasasprou/Documents/superset` - - `git checkout -b feat/terminal-host-daemon origin/main` - -2. Run Desktop tests while iterating: - - - `cd apps/desktop` - - `bun test` - - Expected: existing tests pass; new tests added by this plan should fail before their implementation and pass after. - -3. Run Desktop dev build: - - - `cd /Users/andreasasprou/Documents/superset` - - `bun dev` - - Expected: Electron app launches; terminals function. - -4. Manual persistence demo (post-implementation): - - - Enable persistence toggle in Settings → Behavior. - - Open a terminal pane and run one of the target AI agents: `opencode`, `claude`, or `codex`. - - Interact with the agent (start a conversation, let it generate code). - - Quit the app (Cmd+Q). - - Reopen the app and verify: - - Screen content matches pre-quit state exactly. - - Cursor is in correct position. - - Arrow keys work correctly (not printing escape codes). - - Can immediately continue interacting without redraw. - - While app is closed, optionally run a command that prints periodically (e.g. `watch date`) and confirm it progressed when reattached. - -## Validation and Acceptance - -Acceptance is met when all of the following are true: - -1. Persistence disabled (default): quitting Superset kills terminal sessions (current behavior). -2. Persistence enabled: terminal sessions survive app quit/reopen; output continues to be captured while app is closed. -3. Perfect TUI resume: the following AI coding agents resume with correct screen state and correct interactive input semantics immediately on reopen: - - **opencode** - - **claude code** (Anthropic's Claude CLI) - - **codex** (OpenAI Codex CLI) -4. Update survival: using the in-app update install flow does not kill persistent sessions; reopening the updated app can attach to existing sessions. -5. Automated tests exist for the headless snapshot round-trip and pass in CI-equivalent `bun test` runs. - -## Idempotence and Recovery - -This plan should be safe to apply incrementally: - -- Each milestone adds functionality behind stable interfaces and can be rerun. -- Socket + token files under `SUPERSET_HOME_DIR` must be created with safe permissions and should not be overwritten unexpectedly. If regeneration is needed (e.g. token compromised), provide an explicit “reset daemon” action and document it. -- If the daemon fails to start or protocol mismatch occurs, the app must fail gracefully: show a recoverable error and allow “Restart terminal” (non-persistent) rather than hanging. - -Rollback strategy (if needed): - -- Keep the old in-process `TerminalManager` path behind a feature flag during migration (temporary). -- If daemon integration is unstable, disable the persistence toggle and fall back to in-process PTY ownership. - -## Artifacts and Notes - -When implementing, capture short evidence snippets here (examples, not code fences): - -- Example of successful daemon handshake log output. -- Example of a snapshot payload size and attach timing. -- Example of a TUI resume manual checklist with timestamps. - -## Interfaces and Dependencies - -### New dependencies (Desktop app) - -In `apps/desktop/package.json`, add: - -- `@xterm/headless` (Node-only headless emulator in daemon) - -Reuse existing: - -- `@xterm/addon-serialize` (snapshot generation) -- `node-pty` (PTY spawning in daemon) - -### Required modules and types - -Create `apps/desktop/src/main/lib/terminal-host/types.ts` with stable protocol shapes: - - export interface TerminalHostHelloRequest { token: string; protocolVersion: 1 } - export interface TerminalHostHelloResponse { protocolVersion: 1; daemonVersion: string } - - export interface AttachResult { - snapshotAnsi: string; - rehydrateSequences: string; - cwd: string | null; - } - - export type TerminalHostRequest = - | { type: "hello"; payload: TerminalHostHelloRequest } - | { type: "createOrAttach"; payload: { sessionId: string; cols: number; rows: number; cwd?: string; env?: Record } } - | { type: "write"; payload: { sessionId: string; data: string } } - | { type: "resize"; payload: { sessionId: string; cols: number; rows: number } } - | { type: "detach"; payload: { sessionId: string } } - | { type: "kill"; payload: { sessionId: string } } - | { type: "killAll"; payload: {} }; - -Daemon must implement these and keep them backwards compatible (additive changes only). - -### Main process integration points - -Files that will change: - -- `apps/desktop/electron.vite.config.ts` (build daemon entry) -- `apps/desktop/src/main/index.ts` (quit behavior based on setting; ensure daemon survival on quit/update) -- `apps/desktop/src/main/lib/terminal/manager.ts` (delegate to daemon client) -- `apps/desktop/src/lib/trpc/routers/terminal/terminal.ts` (return snapshot payload; stream from daemon) -- `apps/desktop/src/renderer/.../Terminal/Terminal.tsx` (apply snapshot/rehydrate) -- `packages/local-db/src/schema/schema.ts` and migrations (new setting) -- `apps/desktop/src/lib/trpc/routers/settings/index.ts` + renderer settings UI (toggle + “stop daemon”) - -Windows future: - -- Design IPC so it can swap UDS for named pipes without changing higher-level interfaces. - diff --git a/docs/LARGE_PASTE_HANG_ANALYSIS.md b/docs/LARGE_PASTE_HANG_ANALYSIS.md deleted file mode 100644 index 3006a8f353d..00000000000 --- a/docs/LARGE_PASTE_HANG_ANALYSIS.md +++ /dev/null @@ -1,60 +0,0 @@ -# Large Paste into `vi` — Postmortem & Fix - -## Problem -Pasting large blocks of text (e.g. 3k+ lines) into `vi` inside Superset Desktop’s persistent terminal could: -- hang the terminal daemon / freeze all terminals, or -- partially paste and then silently stop (missing chunks). - -This was most visible on macOS (small kernel PTY buffer + very high output volume during `vi` repaints). - -## What Was Actually Happening -There were two distinct failure modes. - -### 1) CPU saturation on output (daemon side) -Large pastes cause `vi` to repaint aggressively, producing huge volumes of escape-sequence-heavy output. If the daemon tries to parse and apply that output to the headless xterm emulator in large, unbounded chunks, it can monopolize the event loop and trigger request timeouts / “frozen terminals”. - -### 2) Backpressure on input (PTY write side) -PTY writes must respect backpressure. When writing directly to a PTY file descriptor in non-blocking mode, the kernel can return: -- `EAGAIN` / `EWOULDBLOCK` (normal: PTY buffer full) - -If `EAGAIN` is treated as fatal (or if the queue is cleared on error), paste chunks get dropped. - -## Final Fix (Working) -The solution is end-to-end flow control + isolation. - -### Process isolation (per terminal) -Each PTY runs in its own subprocess (`apps/desktop/src/main/terminal-host/pty-subprocess.ts`). One terminal hitting backpressure can’t freeze the daemon or other terminals. - -### Binary framing (no JSON/NDJSON on hot paths) -Subprocess ↔ daemon communication uses a small length-prefixed binary framing protocol (`apps/desktop/src/main/terminal-host/pty-subprocess-ipc.ts`) to avoid JSON stringify/parse overhead on escape-heavy output. - -### Output batching + stdout backpressure -Subprocess batches PTY output (32ms cadence, 128KB max) and pauses PTY reads when `process.stdout` is backpressured. - -### Input backpressure (retry, don’t drop) -Subprocess writes to the PTY fd via async `fs.write()` (when fd is available) and treats `EAGAIN`/`EWOULDBLOCK` as expected backpressure: -- keeps the queued buffers -- retries with exponential backoff (2ms → 50ms) -- pauses upstream `stdin` when backlog exceeds a high watermark and resumes once drained - -### Daemon responsiveness (time-sliced emulator) -The daemon applies PTY output to the headless emulator in time-budgeted slices to avoid long single-tick stalls during heavy output bursts. - -### Renderer paste behavior -Renderer wraps clipboard pastes with bracketed paste sequences and chunks large payloads to reduce burstiness. - -## Debugging / Observability -Set these env vars and restart the app: -- `SUPERSET_PTY_SUBPROCESS_DEBUG=1` — subprocess batching + PTY input backpressure logs -- `SUPERSET_TERMINAL_EMULATOR_DEBUG=1` — daemon emulator budget/overrun logs - -Helpful process inspection: -```bash -ps aux | rg "terminal-host|pty-subprocess" -n -``` - -## Repro / Verification -1. Start the desktop app (`apps/desktop`). -2. Open a terminal, run `vi tmp.txt` and enter insert mode (`i`). -3. Paste ~3000+ lines. -4. Verify `vi` receives all lines (save to disk and check line count) and other terminals remain responsive. From b82b78d71fe6e8b1bfc2dc493cacaf5b51edf1e6 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Fri, 2 Jan 2026 11:12:05 +0200 Subject: [PATCH 46/51] fix(desktop): resolve orphan PTY processes on workspace deletion MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit - Add escalation watchdog in handleKill: SIGTERM → SIGKILL → force exit node-pty's onExit callback doesn't fire reliably after pty.kill(SIGTERM) - Fix dispose() async bug: capture subprocess ref before nullifying - Add diagnostic logging throughout kill flow for debugging - Fix Terminal.tsx hook dependency warnings with targeted biome-ignore - Add TERMINAL_HOST_RUNBOOK.md for daemon debugging/testing --- apps/desktop/docs/TERMINAL_HOST_RUNBOOK.md | 138 ++++++++++++++++++ .../src/lib/trpc/routers/terminal/terminal.ts | 9 ++ .../src/main/lib/terminal-host/client.ts | 16 +- .../src/main/lib/terminal/daemon-manager.ts | 37 ++++- .../src/main/terminal-host/pty-subprocess.ts | 72 ++++++++- .../desktop/src/main/terminal-host/session.ts | 82 +++++++++-- .../src/main/terminal-host/terminal-host.ts | 114 +++++++++++++-- .../TabsContent/Terminal/Terminal.tsx | 22 ++- 8 files changed, 452 insertions(+), 38 deletions(-) create mode 100644 apps/desktop/docs/TERMINAL_HOST_RUNBOOK.md diff --git a/apps/desktop/docs/TERMINAL_HOST_RUNBOOK.md b/apps/desktop/docs/TERMINAL_HOST_RUNBOOK.md new file mode 100644 index 00000000000..e4bd90796d0 --- /dev/null +++ b/apps/desktop/docs/TERMINAL_HOST_RUNBOOK.md @@ -0,0 +1,138 @@ +# Terminal Host Daemon — Operations Runbook + +Quick reference for debugging and testing the terminal persistence daemon. + +--- + +## File Locations + +| Environment | Directory | Socket | PID | Logs | +|-------------|-----------|--------|-----|------| +| **Development** | `~/.superset-dev/` | `terminal-host.sock` | `terminal-host.pid` | `daemon.log` | +| **Production** | `~/.superset/` | `terminal-host.sock` | `terminal-host.pid` | None by default | + +--- + +## Common Commands + +```bash +# === STATUS === +# Check if daemon is running +cat ~/.superset-dev/terminal-host.pid && ps -p $(cat ~/.superset-dev/terminal-host.pid) + +# View daemon logs (dev only) +cat ~/.superset-dev/daemon.log +tail -f ~/.superset-dev/daemon.log # Live follow + +# === RESTART DAEMON === +# Kill daemon (required to pick up code changes) +kill -9 $(cat ~/.superset-dev/terminal-host.pid) +# Daemon auto-restarts when app connects + +# === FIND ORPHANS === +# Dev orphan subprocesses +ps aux | grep "pty-subprocess.*persistent-terminals" | grep -v grep + +# Production orphan subprocesses +ps aux | grep "Superset.app.*pty-subprocess" | grep -v grep + +# All terminal-related processes +ps aux | grep -E "terminal-host|pty-subprocess" | grep -v grep + +# === CLEANUP ORPHANS === +# Kill all dev subprocesses +pkill -9 -f "persistent-terminals.*pty-subprocess" + +# Kill all production subprocesses (careful!) +pkill -9 -f "Superset.app.*pty-subprocess" +``` + +--- + +## Testing Kill Flow + +1. **Kill existing daemon** (picks up code changes): + ```bash + kill -9 $(cat ~/.superset-dev/terminal-host.pid) + ``` + +2. **Clear logs** (optional): + ```bash + > ~/.superset-dev/daemon.log + ``` + +3. **Start dev server**, create workspace with terminals + +4. **Delete the workspace** + +5. **Check results**: + ```bash + # View kill flow in logs + cat ~/.superset-dev/daemon.log | grep -E "handleKill|onExit|EXIT frame|Force disposing" + + # Verify no orphans + ps aux | grep "pty-subprocess.*persistent-terminals" | grep -v grep + ``` + +### Expected Log Flow (Success) +``` +handleKill: calling pty.kill(SIGTERM) +handleKill: escalating to SIGKILL # After 2s if needed +onExit fired: exitCode=0, signal=9 +onExit: EXIT frame sent +Received EXIT frame +Subprocess exited with code 0 +``` + +### Failure Indicators +- `Force disposing stuck session after 5000ms` — onExit never fired, fallback kicked in +- Orphan `pty-subprocess` processes after workspace delete + +--- + +## Architecture + +``` +App (Renderer) + ↓ tRPC +Electron Main + ↓ Unix Socket +terminal-host daemon ← ~/.superset[-dev]/ + ↓ stdin/stdout IPC +pty-subprocess (per session) ← Owns the PTY + ↓ +shell (zsh/bash) +``` + +**Key insight**: Daemon persists across app restarts. Code changes require daemon restart. + +--- + +## Known Issues + +### node-pty `onExit` doesn't fire after `pty.kill(SIGTERM)` + +**Symptom**: Subprocess stays alive, session stuck until 5s timeout. + +**Solution** (implemented): Escalation watchdog in `handleKill()`: +- 0s: Send SIGTERM +- +2s: Escalate to SIGKILL if still alive +- +3s: Force exit if onExit still hasn't fired + +**Files**: `src/main/terminal-host/pty-subprocess.ts` + +--- + +## Adding Diagnostic Logging + +Daemon logs go to `~/.superset-dev/daemon.log`. To add logging: + +```typescript +// In pty-subprocess.ts (subprocess stderr → daemon.log) +console.error(`[pty-subprocess] your message`); + +// In session.ts or terminal-host.ts (daemon stdout → daemon.log) +console.log(`[Session ${id}] your message`); +``` + +Remember: **Kill daemon after code changes** to pick up new logging. diff --git a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts index 3baf541f31d..ab2f441fcd7 100644 --- a/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts +++ b/apps/desktop/src/lib/trpc/routers/terminal/terminal.ts @@ -108,6 +108,15 @@ export const createTerminalRouter = () => { } catch (error) { const message = error instanceof Error ? error.message : "Write failed"; + + // If session is gone, emit exit instead of error. + // This completes the subscription cleanly and prevents error toast floods + // when workspaces with terminals are deleted. + if (message.includes("not found or not alive")) { + terminalManager.emit(`exit:${input.paneId}`, 0, "SIGTERM"); + return; + } + terminalManager.emit(`error:${input.paneId}`, { error: message, code: "WRITE_FAILED", diff --git a/apps/desktop/src/main/lib/terminal-host/client.ts b/apps/desktop/src/main/lib/terminal-host/client.ts index 1096d7c2ebb..5e44172f35b 100644 --- a/apps/desktop/src/main/lib/terminal-host/client.ts +++ b/apps/desktop/src/main/lib/terminal-host/client.ts @@ -14,6 +14,7 @@ import { EventEmitter } from "node:events"; import { existsSync, mkdirSync, + openSync, readFileSync, unlinkSync, writeFileSync, @@ -587,10 +588,23 @@ export class TerminalHostClient extends EventEmitter { `[TerminalHostClient] Spawning daemon with execPath: ${process.execPath}`, ); + // Open log file for daemon output (helps debug daemon-side issues) + const logPath = join(SUPERSET_HOME_DIR, "daemon.log"); + let logFd: number; + try { + logFd = openSync(logPath, "a"); + } catch (error) { + console.warn( + `[TerminalHostClient] Failed to open daemon log file: ${error}`, + ); + // Fall back to ignoring output if we can't open log file + logFd = -1; + } + // Spawn daemon as detached process const child = spawn(process.execPath, [daemonScript], { detached: true, - stdio: "ignore", + stdio: logFd >= 0 ? ["ignore", logFd, logFd] : "ignore", env: { ...process.env, ELECTRON_RUN_AS_NODE: "1", diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index c591ea17b49..04f82bbae9f 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -326,12 +326,18 @@ export class DaemonTerminalManager extends EventEmitter { }): Promise { const { paneId, deleteHistory = false } = params; - await this.client.kill({ sessionId: paneId, deleteHistory }); - + // Emit exit event BEFORE killing so tRPC subscriptions complete cleanly. + // This prevents WRITE_FAILED errors when the daemon kills the session + // but React components are still mounted with active subscriptions. + // The daemon will also emit an exit event, but duplicate events are + // harmless since emit.complete() has already been called. const session = this.sessions.get(paneId); - if (session) { + if (session?.isAlive) { session.isAlive = false; + this.emit(`exit:${paneId}`, 0, "SIGTERM"); } + + await this.client.kill({ sessionId: paneId, deleteHistory }); } detach(params: { paneId: string }): void { @@ -412,23 +418,40 @@ export class DaemonTerminalManager extends EventEmitter { return { killed: 0, failed: 0 }; } + console.log( + `[DaemonTerminalManager] Killing ${paneIdsToKill.size} sessions for workspace ${workspaceId}`, + ); + let killed = 0; let failed = 0; for (const paneId of paneIdsToKill) { try { - await this.client.kill({ sessionId: paneId, deleteHistory: true }); - // Clean up local state if it exists + // Emit exit event BEFORE killing so tRPC subscriptions complete cleanly. + // This prevents WRITE_FAILED error toast floods when deleting workspaces. const session = this.sessions.get(paneId); - if (session) { + if (session?.isAlive) { session.isAlive = false; + this.emit(`exit:${paneId}`, 0, "SIGTERM"); } + + await this.client.kill({ sessionId: paneId, deleteHistory: true }); killed++; - } catch { + } catch (error) { + console.error( + `[DaemonTerminalManager] Failed to kill session ${paneId}:`, + error, + ); failed++; } } + if (failed > 0) { + console.warn( + `[DaemonTerminalManager] killByWorkspaceId: killed=${killed}, failed=${failed}`, + ); + } + return { killed, failed }; } diff --git a/apps/desktop/src/main/terminal-host/pty-subprocess.ts b/apps/desktop/src/main/terminal-host/pty-subprocess.ts index fc7bf5db4a6..1edc71f78cb 100644 --- a/apps/desktop/src/main/terminal-host/pty-subprocess.ts +++ b/apps/desktop/src/main/terminal-host/pty-subprocess.ts @@ -299,16 +299,24 @@ function handleSpawn(payload: Buffer): void { }); ptyProcess.onExit(({ exitCode, signal }) => { + console.error( + `[pty-subprocess] onExit fired: exitCode=${exitCode}, signal=${signal}`, + ); flushOutput(); const exitPayload = Buffer.allocUnsafe(8); exitPayload.writeInt32LE(exitCode ?? 0, 0); exitPayload.writeInt32LE(signal ?? 0, 4); send(PtySubprocessIpcType.Exit, exitPayload); + console.error("[pty-subprocess] onExit: EXIT frame sent"); ptyProcess = null; ptyFd = null; - setTimeout(() => process.exit(0), 100); + console.error("[pty-subprocess] onExit: scheduling process.exit(0)"); + setTimeout(() => { + console.error("[pty-subprocess] onExit: calling process.exit(0)"); + process.exit(0); + }, 100); }); const pidPayload = Buffer.allocUnsafe(4); @@ -343,13 +351,67 @@ function handleResize(payload: Buffer): void { } function handleKill(payload: Buffer): void { - if (!ptyProcess) return; + const signal = payload.length > 0 ? payload.toString("utf8") : "SIGTERM"; + console.error( + `[pty-subprocess] handleKill: ptyProcess=${!!ptyProcess}, pid=${ptyProcess?.pid}, signal=${signal}`, + ); + + if (!ptyProcess) { + console.error("[pty-subprocess] handleKill: no ptyProcess to kill"); + return; + } + + const pid = ptyProcess.pid; + + // Step 1: Send the requested signal (usually SIGTERM for graceful shutdown) try { - const signal = payload.length > 0 ? payload.toString("utf8") : undefined; + console.error( + `[pty-subprocess] handleKill: calling pty.kill(${signal}) on pid ${pid}`, + ); ptyProcess.kill(signal); - } catch { - // Ignore + console.error("[pty-subprocess] handleKill: pty.kill() returned"); + } catch (error) { + console.error( + `[pty-subprocess] handleKill: pty.kill() threw: ${error instanceof Error ? error.message : String(error)}`, + ); } + + // Step 2: Escalate to SIGKILL if still alive after 2 seconds + // node-pty's onExit callback may not fire reliably after pty.kill() + const escalationTimer = setTimeout(() => { + if (!ptyProcess) return; // Already exited via onExit + + console.error( + `[pty-subprocess] handleKill: escalating to SIGKILL for pid ${pid}`, + ); + try { + ptyProcess.kill("SIGKILL"); + } catch { + // Process may already be dead + } + + // Step 3: Force completion if onExit still hasn't fired after another 1 second + // This ensures the subprocess exits even if node-pty never emits onExit + const forceExitTimer = setTimeout(() => { + if (!ptyProcess) return; // Finally exited via onExit + + console.error( + `[pty-subprocess] handleKill: forcing exit, onExit never fired for pid ${pid}`, + ); + + // Synthesize Exit frame since onExit won't fire + const exitPayload = Buffer.allocUnsafe(8); + exitPayload.writeInt32LE(-1, 0); // Unknown exit code + exitPayload.writeInt32LE(9, 4); // SIGKILL signal number + send(PtySubprocessIpcType.Exit, exitPayload); + + ptyProcess = null; + ptyFd = null; + process.exit(0); + }, 1000); + forceExitTimer.unref(); + }, 2000); + escalationTimer.unref(); } function handleDispose(): void { diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index 8eec4ed148f..47113dae7b5 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -91,6 +91,7 @@ export class Session { private lastAttachedAt: Date; private exitCode: number | null = null; private disposed = false; + private terminatingAt: number | null = null; private subprocessDecoder: PtySubprocessFrameDecoder | null = null; private subprocessStdinQueue: Buffer[] = []; private subprocessStdinQueuedBytes = 0; @@ -294,6 +295,9 @@ export class Session { case PtySubprocessIpcType.Exit: { const exitCode = payload.length >= 4 ? payload.readInt32LE(0) : 0; const signal = payload.length >= 8 ? payload.readInt32LE(4) : 0; + console.log( + `[Session ${this.sessionId}] Received EXIT frame: exitCode=${exitCode}, signal=${signal}`, + ); this.exitCode = exitCode; this.broadcastEvent("exit", { @@ -483,8 +487,18 @@ export class Session { } private sendKillToSubprocess(signal?: string): boolean { + console.log( + `[Session ${this.sessionId}] sendKillToSubprocess(${signal}): subprocess.stdin=${!!this.subprocess?.stdin}, disposed=${this.disposed}`, + ); const payload = signal ? Buffer.from(signal, "utf8") : undefined; - return this.sendFrameToSubprocess(PtySubprocessIpcType.Kill, payload); + const result = this.sendFrameToSubprocess( + PtySubprocessIpcType.Kill, + payload, + ); + console.log( + `[Session ${this.sessionId}] sendKillToSubprocess(): sendFrameToSubprocess returned ${result}`, + ); + return result; } private sendDisposeToSubprocess(): boolean { @@ -664,6 +678,24 @@ export class Session { return this.subprocess !== null && this.exitCode === null; } + /** + * Check if session is in the process of terminating. + * A terminating session has received a kill signal but hasn't exited yet. + */ + get isTerminating(): boolean { + return this.terminatingAt !== null; + } + + /** + * Check if session can be attached to. + * A session is attachable if it's alive and not terminating. + * This prevents race conditions where createOrAttach is called + * immediately after kill but before the PTY has actually exited. + */ + get isAttachable(): boolean { + return this.isAlive && !this.isTerminating; + } + /** * Wait for PTY to be ready to accept writes. * Returns immediately if already ready, or waits for Spawned event. @@ -791,20 +823,45 @@ export class Session { } /** - * Kill the PTY process + * Kill the PTY process. + * Marks the session as terminating immediately (idempotent). + * The actual PTY termination is async - use isTerminating to check state. */ kill(signal: string = "SIGTERM"): void { + console.log( + `[Session ${this.sessionId}] kill(): terminatingAt=${this.terminatingAt}, subprocess=${!!this.subprocess}, subprocessReady=${this.subprocessReady}, ptyPid=${this.ptyPid}`, + ); + + // Idempotent: if already terminating, don't send another signal + if (this.terminatingAt !== null) { + console.log( + `[Session ${this.sessionId}] kill(): already terminating, skipping`, + ); + return; + } + + // Mark as terminating immediately to prevent race conditions + this.terminatingAt = Date.now(); + if (this.subprocess && this.subprocessReady) { - this.sendKillToSubprocess(signal); + const sent = this.sendKillToSubprocess(signal); + console.log( + `[Session ${this.sessionId}] kill(): sendKillToSubprocess(${signal}) returned ${sent}`, + ); return; } // If the subprocess isn't ready yet, fall back to killing the subprocess itself - // so session termination is reliable ( differentiation isn't meaningful pre-spawn). + // so session termination is reliable (differentiation isn't meaningful pre-spawn). + console.log( + `[Session ${this.sessionId}] kill(): subprocess not ready, using direct kill`, + ); try { this.subprocess?.kill(signal as NodeJS.Signals); - } catch { - // Ignore + } catch (error) { + console.log( + `[Session ${this.sessionId}] kill(): direct kill failed: ${error}`, + ); } } @@ -816,11 +873,18 @@ export class Session { this.disposed = true; if (this.subprocess) { + // Capture reference before nullifying - the timeout needs it + const subprocess = this.subprocess; this.sendDisposeToSubprocess(); - // Force kill after timeout - setTimeout(() => { - this.subprocess?.kill("SIGKILL"); + // Force kill after timeout if dispose frame didn't terminate it + const killTimer = setTimeout(() => { + try { + subprocess.kill("SIGKILL"); + } catch { + // Process may already be dead + } }, 1000); + killTimer.unref(); // Don't keep daemon alive for this timer this.subprocess = null; } this.subprocessReady = false; diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index 40d5e0f9494..1451af4e91a 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -27,8 +27,12 @@ import { createSession, type Session } from "./session"; // TerminalHost Class // ============================================================================= +/** Timeout for force-disposing sessions that don't exit after kill */ +const KILL_TIMEOUT_MS = 5000; + export class TerminalHost { private sessions: Map = new Map(); + private killTimers: Map = new Map(); /** * Create or attach to a terminal session @@ -42,6 +46,19 @@ export class TerminalHost { let session = this.sessions.get(sessionId); let isNew = false; + // If session is terminating (kill was called but PTY hasn't exited yet), + // force-dispose it and create a fresh session. This prevents race conditions + // where createOrAttach is called immediately after kill. + if (session?.isTerminating) { + console.log( + `[TerminalHost] Session ${sessionId} is terminating, force-disposing for fresh start`, + ); + session.dispose(); + this.sessions.delete(sessionId); + this.clearKillTimer(sessionId); + session = undefined; + } + // If session exists but is dead, dispose it and create a new one if (session && !session.isAlive) { session.dispose(); @@ -112,19 +129,21 @@ export class TerminalHost { } /** - * Write data to a terminal session + * Write data to a terminal session. + * Throws if session is not found or is terminating. */ write(request: WriteRequest): EmptyResponse { - const session = this.getSession(request.sessionId); + const session = this.getActiveSession(request.sessionId); session.write(request.data); return { success: true }; } /** - * Resize a terminal session + * Resize a terminal session. + * Throws if session is not found or is terminating. */ resize(request: ResizeRequest): EmptyResponse { - const session = this.getSession(request.sessionId); + const session = this.getActiveSession(request.sessionId); session.resize(request.cols, request.rows); return { success: true }; } @@ -146,14 +165,42 @@ export class TerminalHost { } /** - * Kill a terminal session + * Kill a terminal session. + * The session is marked as terminating immediately (non-attachable). + * A fail-safe timer ensures cleanup even if the PTY never exits. */ kill(request: KillRequest): EmptyResponse { - const session = this.sessions.get(request.sessionId); - if (session) { - session.kill(); - // Session will be removed on exit event + const { sessionId } = request; + const session = this.sessions.get(sessionId); + + console.log( + `[TerminalHost] kill(${sessionId}): found=${!!session}, isTerminating=${session?.isTerminating}, isAlive=${session?.isAlive}`, + ); + + if (!session) { + return { success: true }; } + + session.kill(); + console.log(`[TerminalHost] kill(${sessionId}): session.kill() called`); + + // Set up fail-safe timer to force-dispose if exit never fires. + // This prevents zombie sessions if the PTY process hangs. + if (!this.killTimers.has(sessionId)) { + const timer = setTimeout(() => { + const s = this.sessions.get(sessionId); + if (s?.isTerminating) { + console.warn( + `[TerminalHost] Force disposing stuck session ${sessionId} after ${KILL_TIMEOUT_MS}ms`, + ); + s.dispose(); + this.sessions.delete(sessionId); + } + this.killTimers.delete(sessionId); + }, KILL_TIMEOUT_MS); + this.killTimers.set(sessionId, timer); + } + return { success: true }; } @@ -169,14 +216,17 @@ export class TerminalHost { } /** - * List all sessions + * List all sessions. + * Note: isAlive reports isAttachable (alive AND not terminating) to prevent + * race conditions where killByWorkspaceId sees a session as alive while + * it's actually in the process of being killed. */ listSessions(): ListSessionsResponse { const sessions = Array.from(this.sessions.values()).map((session) => ({ sessionId: session.sessionId, workspaceId: session.workspaceId, paneId: session.paneId, - isAlive: session.isAlive, + isAlive: session.isAttachable, // Use isAttachable to prevent kill/attach races attachedClients: session.clientCount, })); @@ -184,10 +234,11 @@ export class TerminalHost { } /** - * Clear scrollback for a session + * Clear scrollback for a session. + * Throws if session is not found or is terminating. */ clearScrollback(request: ClearScrollbackRequest): EmptyResponse { - const session = this.getSession(request.sessionId); + const session = this.getActiveSession(request.sessionId); session.clearScrollback(); return { success: true }; } @@ -211,6 +262,13 @@ export class TerminalHost { * Clean up all sessions on shutdown */ dispose(): void { + // Clear all kill timers + for (const timer of this.killTimers.values()) { + clearTimeout(timer); + } + this.killTimers.clear(); + + // Dispose all sessions for (const session of this.sessions.values()) { session.dispose(); } @@ -232,6 +290,22 @@ export class TerminalHost { return session; } + /** + * Get an active (attachable) session by ID. + * Throws if session doesn't exist or is terminating. + * Use this for mutating operations (write, resize, clearScrollback). + */ + private getActiveSession(sessionId: string): Session { + const session = this.sessions.get(sessionId); + if (!session) { + throw new Error(`Session not found: ${sessionId}`); + } + if (!session.isAttachable) { + throw new Error(`Session not attachable: ${sessionId}`); + } + return session; + } + /** * Handle session exit */ @@ -240,11 +314,25 @@ export class TerminalHost { _exitCode: number, _signal?: number, ): void { + // Clear the kill timer since session exited normally + this.clearKillTimer(sessionId); + // Keep session around for a bit so clients can see exit status // Then clean up (reschedule if clients still attached) this.scheduleSessionCleanup(sessionId); } + /** + * Clear the kill timeout for a session + */ + private clearKillTimer(sessionId: string): void { + const timer = this.killTimers.get(sessionId); + if (timer) { + clearTimeout(timer); + this.killTimers.delete(sessionId); + } + } + /** * Schedule cleanup of a dead session * Reschedules if clients are still attached diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 8a8ca1eebf9..7ebaeb3a71f 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -331,8 +331,10 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } } } - }, []); + // biome-ignore lint/correctness/useExhaustiveDependencies: refs used intentionally to avoid recreating callback + }, [paneId, setConnectionError]); + // biome-ignore lint/correctness/useExhaustiveDependencies: refs (resizeRef, updateCwdRef, rendererRef) used intentionally to read latest values without recreating callback const maybeApplyInitialState = useCallback(() => { if (!didFirstRenderRef.current) return; const result = pendingInitialStateRef.current; @@ -518,6 +520,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } }, [flushPendingEvents, paneId]); + // biome-ignore lint/correctness/useExhaustiveDependencies: createOrAttachRef used intentionally to read latest value without recreating callback const handleRetryConnection = useCallback(() => { setConnectionError(null); const xterm = xtermRef.current; @@ -550,7 +553,13 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }, }, ); - }, [paneId, workspaceId, maybeApplyInitialState, flushPendingEvents]); + }, [ + paneId, + workspaceId, + maybeApplyInitialState, + flushPendingEvents, + setConnectionError, + ]); const handleStreamData = (event: TerminalStreamEvent) => { // Queue events until terminal is ready to prevent data loss @@ -629,6 +638,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { [isFocused], ); + // biome-ignore lint/correctness/useExhaustiveDependencies: refs (writeRef, resizeRef, detachRef, clearScrollbackRef, createOrAttachRef) used intentionally to read latest values without resubscribing useEffect(() => { const container = terminalRef.current; if (!container) return; @@ -901,7 +911,13 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { searchAddonRef.current = null; rendererRef.current = null; }; - }, [paneId, workspaceId, flushPendingEvents, maybeApplyInitialState]); + }, [ + paneId, + workspaceId, + flushPendingEvents, + maybeApplyInitialState, + setConnectionError, + ]); useEffect(() => { const xterm = xtermRef.current; From 0db2ec60f29621b1ec3c5107c84e5394918dd851 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Fri, 2 Jan 2026 11:21:47 +0200 Subject: [PATCH 47/51] chore(desktop): remove verbose diagnostic logging from kill flow Keep essential warnings (force exit, attach timeout, force dispose stuck session). Remove step-by-step debugging logs that are too noisy for production. --- .../src/main/terminal-host/pty-subprocess.ts | 25 +------- .../desktop/src/main/terminal-host/session.ts | 64 ++----------------- .../src/main/terminal-host/terminal-host.ts | 5 -- 3 files changed, 8 insertions(+), 86 deletions(-) diff --git a/apps/desktop/src/main/terminal-host/pty-subprocess.ts b/apps/desktop/src/main/terminal-host/pty-subprocess.ts index 1edc71f78cb..5d3321e952a 100644 --- a/apps/desktop/src/main/terminal-host/pty-subprocess.ts +++ b/apps/desktop/src/main/terminal-host/pty-subprocess.ts @@ -299,22 +299,16 @@ function handleSpawn(payload: Buffer): void { }); ptyProcess.onExit(({ exitCode, signal }) => { - console.error( - `[pty-subprocess] onExit fired: exitCode=${exitCode}, signal=${signal}`, - ); flushOutput(); const exitPayload = Buffer.allocUnsafe(8); exitPayload.writeInt32LE(exitCode ?? 0, 0); exitPayload.writeInt32LE(signal ?? 0, 4); send(PtySubprocessIpcType.Exit, exitPayload); - console.error("[pty-subprocess] onExit: EXIT frame sent"); ptyProcess = null; ptyFd = null; - console.error("[pty-subprocess] onExit: scheduling process.exit(0)"); setTimeout(() => { - console.error("[pty-subprocess] onExit: calling process.exit(0)"); process.exit(0); }, 100); }); @@ -352,12 +346,8 @@ function handleResize(payload: Buffer): void { function handleKill(payload: Buffer): void { const signal = payload.length > 0 ? payload.toString("utf8") : "SIGTERM"; - console.error( - `[pty-subprocess] handleKill: ptyProcess=${!!ptyProcess}, pid=${ptyProcess?.pid}, signal=${signal}`, - ); if (!ptyProcess) { - console.error("[pty-subprocess] handleKill: no ptyProcess to kill"); return; } @@ -365,15 +355,9 @@ function handleKill(payload: Buffer): void { // Step 1: Send the requested signal (usually SIGTERM for graceful shutdown) try { - console.error( - `[pty-subprocess] handleKill: calling pty.kill(${signal}) on pid ${pid}`, - ); ptyProcess.kill(signal); - console.error("[pty-subprocess] handleKill: pty.kill() returned"); - } catch (error) { - console.error( - `[pty-subprocess] handleKill: pty.kill() threw: ${error instanceof Error ? error.message : String(error)}`, - ); + } catch { + // Process may already be dead } // Step 2: Escalate to SIGKILL if still alive after 2 seconds @@ -381,9 +365,6 @@ function handleKill(payload: Buffer): void { const escalationTimer = setTimeout(() => { if (!ptyProcess) return; // Already exited via onExit - console.error( - `[pty-subprocess] handleKill: escalating to SIGKILL for pid ${pid}`, - ); try { ptyProcess.kill("SIGKILL"); } catch { @@ -396,7 +377,7 @@ function handleKill(payload: Buffer): void { if (!ptyProcess) return; // Finally exited via onExit console.error( - `[pty-subprocess] handleKill: forcing exit, onExit never fired for pid ${pid}`, + `[pty-subprocess] Force exit: onExit never fired for pid ${pid}`, ); // Synthesize Exit frame since onExit won't fire diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index 47113dae7b5..1202df489ea 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -258,9 +258,6 @@ export class Session { switch (type) { case PtySubprocessIpcType.Ready: this.subprocessReady = true; - console.log( - `[Session ${this.sessionId}] Subprocess ready, spawning PTY`, - ); if (this.pendingSpawn) { this.sendSpawnToSubprocess(this.pendingSpawn); this.pendingSpawn = null; @@ -269,9 +266,6 @@ export class Session { case PtySubprocessIpcType.Spawned: this.ptyPid = payload.length >= 4 ? payload.readUInt32LE(0) : null; - console.log( - `[Session ${this.sessionId}] PTY spawned with pid ${this.ptyPid}`, - ); // Resolve the ready promise so callers can await PTY readiness if (this.ptyReadyResolve) { this.ptyReadyResolve(); @@ -295,9 +289,6 @@ export class Session { case PtySubprocessIpcType.Exit: { const exitCode = payload.length >= 4 ? payload.readInt32LE(0) : 0; const signal = payload.length >= 8 ? payload.readInt32LE(4) : 0; - console.log( - `[Session ${this.sessionId}] Received EXIT frame: exitCode=${exitCode}, signal=${signal}`, - ); this.exitCode = exitCode; this.broadcastEvent("exit", { @@ -487,18 +478,8 @@ export class Session { } private sendKillToSubprocess(signal?: string): boolean { - console.log( - `[Session ${this.sessionId}] sendKillToSubprocess(${signal}): subprocess.stdin=${!!this.subprocess?.stdin}, disposed=${this.disposed}`, - ); const payload = signal ? Buffer.from(signal, "utf8") : undefined; - const result = this.sendFrameToSubprocess( - PtySubprocessIpcType.Kill, - payload, - ); - console.log( - `[Session ${this.sessionId}] sendKillToSubprocess(): sendFrameToSubprocess returned ${result}`, - ); - return result; + return this.sendFrameToSubprocess(PtySubprocessIpcType.Kill, payload); } private sendDisposeToSubprocess(): boolean { @@ -728,33 +709,13 @@ export class Session { // Use snapshot boundary flush for consistent state with continuous output. // This ensures we capture all data received BEFORE attach was called, // even if new data continues to arrive during the flush. - const queuedBefore = this.emulatorWriteQueuedBytes; - const queueItemsBefore = this.emulatorWriteQueue.length; - const flushStart = performance.now(); - const reachedBoundary = await this.flushToSnapshotBoundary( ATTACH_FLUSH_TIMEOUT_MS, ); - const flushTime = performance.now() - flushStart; - const queuedAfter = this.emulatorWriteQueuedBytes; - - // ALWAYS log attach for debugging - const modes = this.emulator.getModes(); - console.log( - `[Session ${this.sessionId}] ATTACH: ` + - `reachedBoundary=${reachedBoundary} ` + - `flushTime=${flushTime.toFixed(0)}ms ` + - `queueBefore=${queueItemsBefore} queueAfter=${this.emulatorWriteQueue.length} ` + - `altScreen=${modes.alternateScreen}`, - ); - if (!reachedBoundary) { console.warn( - `[Session ${this.sessionId}] ATTACH FLUSH TIMEOUT: ` + - `flushTime=${flushTime.toFixed(0)}ms ` + - `queueBefore=${queueItemsBefore} items (${queuedBefore} bytes) ` + - `queueAfter=${this.emulatorWriteQueue.length} items (${queuedAfter} bytes)`, + `[Session ${this.sessionId}] Attach flush timeout after ${ATTACH_FLUSH_TIMEOUT_MS}ms`, ); } @@ -828,15 +789,8 @@ export class Session { * The actual PTY termination is async - use isTerminating to check state. */ kill(signal: string = "SIGTERM"): void { - console.log( - `[Session ${this.sessionId}] kill(): terminatingAt=${this.terminatingAt}, subprocess=${!!this.subprocess}, subprocessReady=${this.subprocessReady}, ptyPid=${this.ptyPid}`, - ); - // Idempotent: if already terminating, don't send another signal if (this.terminatingAt !== null) { - console.log( - `[Session ${this.sessionId}] kill(): already terminating, skipping`, - ); return; } @@ -844,24 +798,16 @@ export class Session { this.terminatingAt = Date.now(); if (this.subprocess && this.subprocessReady) { - const sent = this.sendKillToSubprocess(signal); - console.log( - `[Session ${this.sessionId}] kill(): sendKillToSubprocess(${signal}) returned ${sent}`, - ); + this.sendKillToSubprocess(signal); return; } // If the subprocess isn't ready yet, fall back to killing the subprocess itself // so session termination is reliable (differentiation isn't meaningful pre-spawn). - console.log( - `[Session ${this.sessionId}] kill(): subprocess not ready, using direct kill`, - ); try { this.subprocess?.kill(signal as NodeJS.Signals); - } catch (error) { - console.log( - `[Session ${this.sessionId}] kill(): direct kill failed: ${error}`, - ); + } catch { + // Process may already be dead } } diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index 1451af4e91a..57d199c253c 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -173,16 +173,11 @@ export class TerminalHost { const { sessionId } = request; const session = this.sessions.get(sessionId); - console.log( - `[TerminalHost] kill(${sessionId}): found=${!!session}, isTerminating=${session?.isTerminating}, isAlive=${session?.isAlive}`, - ); - if (!session) { return { success: true }; } session.kill(); - console.log(`[TerminalHost] kill(${sessionId}): session.kill() called`); // Set up fail-safe timer to force-dispose if exit never fires. // This prevents zombie sessions if the PTY process hangs. From 48d116207ce942b4fc655309d9726ce5d7a555bb Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Fri, 2 Jan 2026 17:17:25 +0200 Subject: [PATCH 48/51] fix(desktop): keep terminals mounted to eliminate white screen on workspace switch When terminal persistence is enabled, render all tabs from all workspaces and use visibility:hidden for inactive ones. This eliminates the unmount/remount cycle that caused race conditions during TUI reattach. Changes: - TabsContent: query terminalPersistence setting, render all tabs when enabled - TerminalSettings: add memory warning copy - Terminal.tsx: remove debug logging, add comments clarifying SIGWINCH as fallback - Technical notes: document the approach and trade-offs --- ...02-terminal-persistence-technical-notes.md | 104 ++++++++++++++++- .../SettingsView/TerminalSettings.tsx | 9 +- .../TabsContent/Terminal/Terminal.tsx | 110 ++++++++---------- .../ContentView/TabsContent/index.tsx | 54 ++++++++- .../CONTINUITY_CLAUDE-tui-white-screen.md | 57 +++++++++ .../auto-handoff-2026-01-02T12-58-19.md | 31 +++++ .../auto-handoff-2026-01-02T14-14-50.md | 31 +++++ 7 files changed, 324 insertions(+), 72 deletions(-) create mode 100644 thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md create mode 100644 thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T12-58-19.md create mode 100644 thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T14-14-50.md diff --git a/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md b/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md index 5acd30a22e4..9b7bf2ff3da 100644 --- a/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md +++ b/apps/desktop/docs/2026-01-02-terminal-persistence-technical-notes.md @@ -12,10 +12,12 @@ This document captures the technical decisions, debugging investigations, and so 1. [Architecture Overview](#architecture-overview) 2. [TUI Restoration: Why SIGWINCH Instead of Snapshots](#tui-restoration-why-sigwinch-instead-of-snapshots) -3. [Large Paste Reliability: Subprocess Isolation + Backpressure](#large-paste-reliability-subprocess-isolation--backpressure) -4. [Renderer Notes: WebGL vs Canvas on macOS](#renderer-notes-webgl-vs-canvas-on-macos) -5. [Design Options Considered](#design-options-considered) -6. [Reference Links](#reference-links) +3. [Keeping Terminals Mounted Across Workspace Switches](#keeping-terminals-mounted-across-workspace-switches) +4. [Large Paste Reliability: Subprocess Isolation + Backpressure](#large-paste-reliability-subprocess-isolation--backpressure) +5. [Renderer Notes: WebGL vs Canvas on macOS](#renderer-notes-webgl-vs-canvas-on-macos) +6. [Design Options Considered](#design-options-considered) +7. [Future Improvements](#future-improvements) +8. [Reference Links](#reference-links) --- @@ -113,6 +115,58 @@ if (isAltScreenReattach) { --- +## Keeping Terminals Mounted Across Workspace Switches + +### The Problem + +Even with SIGWINCH-based TUI restoration working correctly, switching between workspaces still caused intermittent white screen issues for TUI apps. Manual window resize would fix it, but the experience was jarring. + +**Root cause:** When switching workspaces, React unmounts the `Terminal` component entirely, destroying the xterm.js instance. On return, a new xterm instance must be created and reattached to the existing PTY session. Despite correct SIGWINCH timing, race conditions between xterm initialization and PTY output caused blank/white screens. + +### The Solution: Keep All Terminals Mounted + +Instead of unmounting Terminal components on workspace/tab switch: + +1. **Render all tabs from all workspaces** simultaneously in `TabsContent` +2. **Hide inactive tabs with CSS** (`visibility: hidden; pointer-events: none;`) +3. **Show only the active tab** for the active workspace + +**Implementation:** `TabsContent/index.tsx` renders `allTabs` with visibility toggling instead of conditional rendering. + +### Why `visibility: hidden` Instead of `display: none` + +Using `visibility: hidden` (not `display: none`) is critical: +- `display: none` removes the element from layout, giving it 0×0 dimensions +- xterm.js and FitAddon expect non-zero dimensions to function correctly +- `visibility: hidden` preserves the element's layout dimensions while hiding it visually + +### Why This Works + +- xterm.js instances persist across navigation—no recreation needed +- No state reconstruction, no reattach timing issues +- The terminal stays exactly as it was when hidden +- The complex SIGWINCH/snapshot restoration code becomes a fallback path only (used for app restart recovery) + +### Trade-offs + +| Aspect | Impact | Mitigation | +|--------|--------|------------| +| Memory | Each terminal holds scrollback buffer + xterm render state | See Future Improvements: LRU hibernation | +| CPU | Hidden terminals still process PTY output | See Future Improvements: buffer output | +| DOM nodes | Many elements even when hidden | `visibility: hidden` is cheap; browser optimizes | + +### When This Applies + +This optimization is **only enabled when Terminal Persistence is ON** in Settings. When persistence is disabled, the original behavior (unmount on switch) is used. + +### Fallback Path + +The SIGWINCH-based restoration logic remains in `Terminal.tsx` as a fallback for: +- **App restart recovery** — fresh xterm must reattach to daemon's PTY session +- **Edge cases** — any scenario where the Terminal component truly remounts + +--- + ## Large Paste Reliability: Subprocess Isolation + Backpressure ### The Problem @@ -228,6 +282,48 @@ Host each terminal in a persistent Electron view. For v1, we implemented a daemon with SIGWINCH-based TUI restoration. This balances correctness (TUI redraws itself) with implementation complexity. +**Update (v1.1):** We discovered that keeping xterm instances mounted (Option A) eliminates the reattach timing issues that caused white screen flashes during workspace/tab switches. When terminal persistence is enabled, we now render all tabs and toggle visibility instead of unmounting. The SIGWINCH restoration logic remains as a fallback for app restart recovery when a fresh xterm instance must reattach to an existing PTY session. + +--- + +## Future Improvements + +These are documented for future work. They are not blocking for the current implementation. + +### 1. Buffer PTY Output for Hidden Terminals + +Currently, hidden terminals continue processing PTY output through xterm.js. For users with many terminals producing continuous output, this wastes CPU cycles. + +**Proposed solution:** +- When a terminal becomes hidden, pause writes to xterm +- Buffer PTY events in memory (or discard if not in alt-screen mode) +- On show, flush buffered events to xterm + +### 2. LRU Terminal Hibernation + +For users with many workspaces (10+), keeping all terminals alive may use excessive memory. + +**Proposed solution:** +- Track terminal last-active timestamps +- When memory pressure is detected, hibernate oldest inactive terminals +- Hibernation = dispose xterm instance, keep PTY alive in daemon +- On reactivation, create new xterm and run normal restore flow + +### 3. Reduce Scrollback for Hidden Terminals + +Each terminal's scrollback buffer can be large (default 10,000 lines). + +**Proposed solution:** +- Reduce `scrollback` option for inactive terminals +- Restore full scrollback on activation (daemon has full history) + +### 4. Memory Usage Metrics + +Add observability to understand real-world memory usage patterns: +- Track number of terminals per user session +- Track memory per terminal (xterm buffers + DOM) +- Surface warnings if approaching problematic thresholds + --- ## Reference Links diff --git a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx index c93d97fe9d1..4e4e6cafe78 100644 --- a/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx +++ b/apps/desktop/src/renderer/screens/main/components/SettingsView/TerminalSettings.tsx @@ -55,8 +55,13 @@ export function TerminalSettings() { Terminal persistence

- Keep terminal sessions alive across app restarts. TUI apps like - Claude Code will resume exactly where you left off. + Keep terminal sessions alive across app restarts and workspace + switches. TUI apps like Claude Code will resume exactly where you + left off. +

+

+ May use more memory with many terminals open. Disable if you + notice performance issues.

Requires app restart to take effect. diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 7ebaeb3a71f..38e85535c07 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -276,24 +276,12 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const flushPendingEvents = useCallback(() => { const xterm = xtermRef.current; if (!xterm) return; - if (pendingEventsRef.current.length === 0) { - console.log( - `[Terminal][${paneId.slice(-8)}] FLUSH: no pending events time=${Date.now()}`, - ); - return; - } + if (pendingEventsRef.current.length === 0) return; const events = pendingEventsRef.current.splice( 0, pendingEventsRef.current.length, ); - const totalBytes = events.reduce( - (sum, e) => sum + (e.type === "data" ? e.data.length : 0), - 0, - ); - console.log( - `[Terminal][${paneId.slice(-8)}] FLUSHING ${events.length} events (${totalBytes} bytes) time=${Date.now()}`, - ); for (const event of events) { if (event.type === "data") { @@ -332,7 +320,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } } // biome-ignore lint/correctness/useExhaustiveDependencies: refs used intentionally to avoid recreating callback - }, [paneId, setConnectionError]); + }, [setConnectionError]); // biome-ignore lint/correctness/useExhaustiveDependencies: refs (resizeRef, updateCwdRef, rendererRef) used intentionally to read latest values without recreating callback const maybeApplyInitialState = useCallback(() => { @@ -403,54 +391,56 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const isAltScreenReattach = !result.isNew && result.snapshot?.modes.alternateScreen; - // EXPERIMENTAL: For alt-screen (TUI) sessions, the serialized snapshot often - // renders incorrectly because styled spaces and positioning get lost. - // Instead of writing broken snapshot, enter alt-screen and trigger SIGWINCH - // so the TUI redraws itself via the live stream. + // For alt-screen (TUI) sessions, the serialized snapshot often renders + // incorrectly because styled spaces and positioning get lost. Instead of + // writing broken snapshot, enter alt-screen and trigger SIGWINCH so the + // TUI redraws itself via the live stream. + // NOTE: This is primarily a fallback path for app restart recovery. + // During normal workspace/tab switching with persistence enabled, + // terminals stay mounted and this code path is not triggered. if (isAltScreenReattach) { - console.log( - `[Terminal][${paneId.slice(-8)}] ALT-SCREEN REATTACH: skipping snapshot, triggering SIGWINCH redraw`, - ); - - // Enter alt-screen mode so TUI output goes to correct buffer - xterm.write("\x1b[?1049h"); - - // Apply rehydration sequences for other modes (bracketed paste, etc.) - if (result.snapshot?.rehydrateSequences) { - // Filter out alt-screen sequences since we already entered - const ESC = "\x1b"; - const filteredRehydrate = result.snapshot.rehydrateSequences - .split(ESC + "[?1049h") - .join("") - .split(ESC + "[?47h") - .join(""); - if (filteredRehydrate) { - xterm.write(filteredRehydrate); + // Enter alt-screen mode and WAIT for xterm to process it before proceeding. + // xterm.write() is async - if we trigger SIGWINCH before alt-screen is entered, + // the TUI receives SIGWINCH in normal mode, ignores it, then xterm switches + // buffers and we get a white screen. + xterm.write("\x1b[?1049h", () => { + // Apply rehydration sequences for other modes (bracketed paste, etc.) + if (result.snapshot?.rehydrateSequences) { + // Filter out alt-screen sequences since we already entered + const ESC = "\x1b"; + const filteredRehydrate = result.snapshot.rehydrateSequences + .split(ESC + "[?1049h") + .join("") + .split(ESC + "[?47h") + .join(""); + if (filteredRehydrate) { + xterm.write(filteredRehydrate); + } } - } - - // Enable streaming BEFORE resize so TUI output comes through - isStreamReadyRef.current = true; - flushPendingEvents(); - // Fit xterm to container and trigger SIGWINCH - requestAnimationFrame(() => { - if (xtermRef.current !== xterm) return; - fitAddon.fit(); + // NOW safe to enable streaming and flush pending events + isStreamReadyRef.current = true; + flushPendingEvents(); - const cols = xterm.cols; - const rows = xterm.rows; - if (cols > 0 && rows > 0) { - console.log( - `[Terminal][${paneId.slice(-8)}] ALT-SCREEN SIGWINCH: ${cols}x${rows} -> ${cols}x${rows - 1} -> ${cols}x${rows}`, - ); - // Resize down then up to guarantee SIGWINCH - resizeRef.current({ paneId, cols, rows: rows - 1 }); - setTimeout(() => { - if (xtermRef.current !== xterm) return; - resizeRef.current({ paneId, cols, rows }); - }, 100); - } + // Fit xterm to container and trigger SIGWINCH + requestAnimationFrame(() => { + if (xtermRef.current !== xterm) return; + + fitAddon.fit(); + const cols = xterm.cols; + const rows = xterm.rows; + + if (cols > 0 && rows > 0) { + // Resize down then up to guarantee SIGWINCH + resizeRef.current({ paneId, cols, rows: rows - 1 }); + setTimeout(() => { + if (xtermRef.current !== xterm) return; + resizeRef.current({ paneId, cols, rows }); + // Force xterm to repaint after SIGWINCH completes + xterm.refresh(0, rows - 1); + }, 100); + } + }); }); updateCwdRef.current(result.scrollback); @@ -564,10 +554,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const handleStreamData = (event: TerminalStreamEvent) => { // Queue events until terminal is ready to prevent data loss if (!xtermRef.current || !isStreamReadyRef.current) { - const dataLen = event.type === "data" ? event.data.length : 0; - console.log( - `[Terminal][${paneId.slice(-8)}] QUEUING event type=${event.type} len=${dataLen} totalQueued=${pendingEventsRef.current.length + 1} time=${Date.now()}`, - ); pendingEventsRef.current.push(event); return; } diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/index.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/index.tsx index fb3908f55f4..8e1331e6ee0 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/index.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/index.tsx @@ -6,19 +6,65 @@ import { TabView } from "./TabView"; export function TabsContent() { const { data: activeWorkspace } = trpc.workspaces.getActive.useQuery(); + const { data: terminalPersistence } = + trpc.settings.getTerminalPersistence.useQuery(); const activeWorkspaceId = activeWorkspace?.id; const allTabs = useTabsStore((s) => s.tabs); const panes = useTabsStore((s) => s.panes); const activeTabIds = useTabsStore((s) => s.activeTabIds); + const activeTabId = activeWorkspaceId + ? activeTabIds[activeWorkspaceId] + : null; + + // Get all tabs for current workspace (for fallback/empty check) + const currentWorkspaceTabs = useMemo(() => { + if (!activeWorkspaceId) return []; + return allTabs.filter((tab) => tab.workspaceId === activeWorkspaceId); + }, [activeWorkspaceId, allTabs]); + const tabToRender = useMemo(() => { - if (!activeWorkspaceId) return null; - const activeTabId = activeTabIds[activeWorkspaceId]; if (!activeTabId) return null; - return allTabs.find((tab) => tab.id === activeTabId) || null; - }, [activeWorkspaceId, activeTabIds, allTabs]); + }, [activeTabId, allTabs]); + + // When terminal persistence is enabled, keep all terminals mounted across + // workspace/tab switches. This prevents TUI white screen issues by avoiding + // the unmount/remount cycle that requires complex reattach/rehydration logic. + // Uses visibility:hidden (not display:none) to preserve xterm dimensions. + if (terminalPersistence) { + // Show empty view only if current workspace has no tabs + if (currentWorkspaceTabs.length === 0) { + return ; + } + + return ( +

+ {allTabs.map((tab) => { + // A tab is visible only if: + // 1. It belongs to the active workspace AND + // 2. It's the active tab for that workspace + const isVisible = + tab.workspaceId === activeWorkspaceId && tab.id === activeTabId; + + return ( +
+ +
+ ); + })} +
+ ); + } + // Original behavior when persistence disabled: only render active tab if (!tabToRender) { return ; } diff --git a/thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md b/thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md new file mode 100644 index 00000000000..f9ee095e214 --- /dev/null +++ b/thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md @@ -0,0 +1,57 @@ +--- +created: 2026-01-02T21:00:00Z +last_updated: 2026-01-02T11:15:00Z +session_count: 3 +status: COMPLETED +--- + +# Session: TUI White Screen on Workspace Switch + +## Goal +Fix the remaining white screen issue when switching back to a workspace with an active TUI (vim, opencode, claude). Currently requires manual resize to fix. + +## Constraints +- Must not regress the original fix (gibberish text on tab switch) +- Must work with Canvas renderer (macOS default) +- Should minimize visual flash during reattach + +## Key Decisions +- Decision 1: Using SIGWINCH approach instead of snapshots for TUI restoration (snapshots don't capture styled spaces) +- Decision 2: Need to ensure alt-screen is fully entered before flushing pending events +- Decision 3: **FINAL** - Keep terminals mounted instead of unmount/remount cycle (Oracle insight: "The moment you create a *new* xterm on remount, you lose emulator state") + +## State +- Done: [x] Captured problem statement + prior fix summary +- Done: [x] Identified alt-screen reattach path in Terminal.tsx +- Done: [x] Analyzed timing of current reattach flow +- Done: [x] Identified 3 likely root causes (ranked by probability) +- Done: [x] Consulted Oracle - discovered fundamental issue with unmount/remount +- Done: [x] Implemented "keep terminals mounted" solution +- Done: [x] Added memory warning to settings +- Done: [x] Removed debug logging +- Done: [x] Updated technical documentation +- Done: [x] User verified: "omg everything feels buttery smooth now!" + +- Complete: [✓] **BUG RESOLVED** + +## Resolution Summary + +**Root Cause:** The SIGWINCH approach was fundamentally fragile. React unmounts Terminal components on workspace switch, destroying xterm.js instances. New xterm on remount loses all emulator state - race conditions were inevitable. + +**Solution:** Keep all terminal components mounted across workspace/tab switches. Use CSS `visibility: hidden` for inactive tabs. Gate behind `terminalPersistence` setting. + +**Files Modified:** +- `TabsContent/index.tsx` - Render all tabs, hide inactive with CSS +- `TerminalSettings.tsx` - Added memory warning +- `Terminal.tsx` - Removed debug logging, kept SIGWINCH as fallback for app restart +- `2026-01-02-terminal-persistence-technical-notes.md` - Documented approach + +## Open Questions (Answered) +- ~~Is xterm.write("\x1b[?1049h") async issue the primary cause?~~ **No - fundamental unmount issue** +- ~~Are container dimensions 0 during workspace switch?~~ **Moot - terminals stay mounted** +- ~~Does xterm.refresh() help after SIGWINCH?~~ **Moot - no more remount cycle** + +## Working Set +- Branch: `persistent-terminals` +- PR: #541 +- Status: Changes ready to commit diff --git a/thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T12-58-19.md b/thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T12-58-19.md new file mode 100644 index 00000000000..e7423bb6d51 --- /dev/null +++ b/thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T12-58-19.md @@ -0,0 +1,31 @@ +--- +type: auto-handoff +date: 2026-01-02T12:58:19.863Z +session_name: tui-white-screen +trigger: pre-compact (opencode) +--- + +# Auto-Handoff: [→] Implement diagnostic logging to confirm root cause + +This handoff was automatically created before context compaction. + +## In Progress + +[→] Implement diagnostic logging to confirm root cause + +## Recent Completed + +[x] Captured problem statement + prior fix summary +- Done: [x] Identified alt-screen reattach path in Terminal.tsx +- Done: [x] Analyzed timing of current reattach flow +- Done: [x] Identified 3 likely root causes (ranked by probability) + +## Resume Instructions + +1. Read this handoff to understand current state +2. Check the ledger for full context: thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md +3. Continue from where you left off + +## Source Ledger + +/Users/andreasasprou/.superset/worktrees/superset/persistent-terminals/thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md diff --git a/thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T14-14-50.md b/thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T14-14-50.md new file mode 100644 index 00000000000..e038ed0c66e --- /dev/null +++ b/thoughts/shared/handoffs/tui-white-screen/auto-handoff-2026-01-02T14-14-50.md @@ -0,0 +1,31 @@ +--- +type: auto-handoff +date: 2026-01-02T14:14:50.011Z +session_name: tui-white-screen +trigger: pre-compact (opencode) +--- + +# Auto-Handoff: [→] Implement diagnostic logging to confirm root cause + +This handoff was automatically created before context compaction. + +## In Progress + +[→] Implement diagnostic logging to confirm root cause + +## Recent Completed + +[x] Captured problem statement + prior fix summary +- Done: [x] Identified alt-screen reattach path in Terminal.tsx +- Done: [x] Analyzed timing of current reattach flow +- Done: [x] Identified 3 likely root causes (ranked by probability) + +## Resume Instructions + +1. Read this handoff to understand current state +2. Check the ledger for full context: thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md +3. Continue from where you left off + +## Source Ledger + +/Users/andreasasprou/.superset/worktrees/superset/persistent-terminals/thoughts/ledgers/CONTINUITY_CLAUDE-tui-white-screen.md From 2ab9fa38719b32c5b1641e71547ce74e132cb68f Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Fri, 2 Jan 2026 17:52:40 +0200 Subject: [PATCH 49/51] perf(desktop): remove duplicate scrollback payload in daemon mode MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In daemon mode, both scrollback and snapshot.snapshotAnsi contained identical ANSI content, doubling IPC payload size (~500KB → 1MB). Changes: - daemon-manager: set scrollback to empty string in daemon mode - Terminal.tsx: use initialAnsi variable preferring snapshot.snapshotAnsi - Terminal.tsx: use snapshot.cwd directly instead of parsing ANSI - Terminal.tsx: only run escape scanning when snapshot.modes unavailable - types.ts: add JSDoc clarifying daemon mode behavior ~50% reduction in IPC payload for terminal sessions. --- .../src/main/lib/terminal/daemon-manager.ts | 6 ++- apps/desktop/src/main/lib/terminal/types.ts | 5 +++ .../TabsContent/Terminal/Terminal.tsx | 39 ++++++++++++------- 3 files changed, 35 insertions(+), 15 deletions(-) diff --git a/apps/desktop/src/main/lib/terminal/daemon-manager.ts b/apps/desktop/src/main/lib/terminal/daemon-manager.ts index 04f82bbae9f..c67ee3644cf 100644 --- a/apps/desktop/src/main/lib/terminal/daemon-manager.ts +++ b/apps/desktop/src/main/lib/terminal/daemon-manager.ts @@ -236,8 +236,10 @@ export class DaemonTerminalManager extends EventEmitter { return { isNew: response.isNew, - // For backwards compatibility, provide scrollback from snapshot - scrollback: response.snapshot.snapshotAnsi, + // In daemon mode, snapshot.snapshotAnsi is the canonical content source. + // We set scrollback to empty to avoid duplicating the payload over IPC. + // The renderer should prefer snapshot.snapshotAnsi when available. + scrollback: "", wasRecovered: response.wasRecovered, snapshot: { snapshotAnsi: response.snapshot.snapshotAnsi, diff --git a/apps/desktop/src/main/lib/terminal/types.ts b/apps/desktop/src/main/lib/terminal/types.ts index 1c656a7534e..eebd65bc949 100644 --- a/apps/desktop/src/main/lib/terminal/types.ts +++ b/apps/desktop/src/main/lib/terminal/types.ts @@ -39,6 +39,11 @@ export type TerminalEvent = TerminalDataEvent | TerminalExitEvent; export interface SessionResult { isNew: boolean; + /** + * Initial terminal content (ANSI). + * In daemon mode, this is empty - prefer `snapshot.snapshotAnsi` when available. + * In non-daemon mode, this contains the recovered scrollback content. + */ scrollback: string; wasRecovered: boolean; /** Snapshot from daemon (if using daemon mode) */ diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 38e85535c07..791240221de 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -337,33 +337,36 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { const restoreSequence = ++restoreSequenceRef.current; try { + // Canonical initial content: prefer snapshot (daemon mode) over scrollback (non-daemon) + // In daemon mode, scrollback is empty to avoid duplicating the payload over IPC. + const initialAnsi = result.snapshot?.snapshotAnsi ?? result.scrollback; + // Track alternate screen mode from snapshot for our own reference // (xterm.buffer.active.type is unreliable after HMR/recovery) isAlternateScreenRef.current = !!result.snapshot?.modes.alternateScreen; isBracketedPasteRef.current = !!result.snapshot?.modes.bracketedPaste; modeScanBufferRef.current = ""; - // Also parse scrollback for escape sequences in case snapshot.modes is incomplete - // This handles cases where the daemon didn't track the mode but the sequences are in history - if (result.scrollback) { + // Fallback: parse initialAnsi for escape sequences when snapshot.modes is unavailable. + // This handles non-daemon mode and edge cases where daemon didn't track the mode. + if (initialAnsi && result.snapshot?.modes === undefined) { // Use lastIndexOf to find the final state - handles multiple enter/exit cycles // (e.g., user opened vim, closed it, opened it again) const enterAltIndex = Math.max( - result.scrollback.lastIndexOf("\x1b[?1049h"), - result.scrollback.lastIndexOf("\x1b[?47h"), + initialAnsi.lastIndexOf("\x1b[?1049h"), + initialAnsi.lastIndexOf("\x1b[?47h"), ); const exitAltIndex = Math.max( - result.scrollback.lastIndexOf("\x1b[?1049l"), - result.scrollback.lastIndexOf("\x1b[?47l"), + initialAnsi.lastIndexOf("\x1b[?1049l"), + initialAnsi.lastIndexOf("\x1b[?47l"), ); if (enterAltIndex !== -1 || exitAltIndex !== -1) { isAlternateScreenRef.current = enterAltIndex > exitAltIndex; } // Bracketed paste mode can toggle during a session - use the last seen state. - const bracketEnableIndex = result.scrollback.lastIndexOf("\x1b[?2004h"); - const bracketDisableIndex = - result.scrollback.lastIndexOf("\x1b[?2004l"); + const bracketEnableIndex = initialAnsi.lastIndexOf("\x1b[?2004h"); + const bracketDisableIndex = initialAnsi.lastIndexOf("\x1b[?2004l"); if (bracketEnableIndex !== -1 || bracketDisableIndex !== -1) { isBracketedPasteRef.current = bracketEnableIndex > bracketDisableIndex; @@ -443,7 +446,12 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { }); }); - updateCwdRef.current(result.scrollback); + // Use snapshot.cwd if available, otherwise parse from content + if (result.snapshot?.cwd) { + updateCwdRef.current(result.snapshot.cwd); + } else { + updateCwdRef.current(initialAnsi); + } return; // Skip normal snapshot flow } @@ -452,7 +460,7 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Force a re-render after write completes to ensure correct display. // (Symptom: restored terminals show corrupted text until resized) // Use fitAddon.fit() and (when using WebGL) clear the glyph atlas to force a full repaint. - xterm.write(result.scrollback, () => { + xterm.write(initialAnsi, () => { const redraw = () => { requestAnimationFrame(() => { try { @@ -504,7 +512,12 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { isStreamReadyRef.current = true; flushPendingEvents(); }); - updateCwdRef.current(result.scrollback); + // Use snapshot.cwd if available, otherwise parse from content + if (result.snapshot?.cwd) { + updateCwdRef.current(result.snapshot.cwd); + } else { + updateCwdRef.current(initialAnsi); + } } catch (error) { console.error("[Terminal] Restoration failed:", error); } From ee78b8fffbc7a5baf808c325a5e087c86e91e9c1 Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Fri, 2 Jan 2026 18:53:51 +0200 Subject: [PATCH 50/51] chore(desktop): remove unused code and fix style issues - Remove unused ptyPid property from Session - Remove unused flushEmulatorWrites method (superseded by flushEmulatorWritesUpTo) - Remove unused getSession method (superseded by getActiveSession) - Fix template literal style in Terminal.tsx - Fix export ordering in hooks/index.ts --- .../desktop/src/main/terminal-host/session.ts | 22 ------------------- .../src/main/terminal-host/terminal-host.ts | 15 ------------- .../TabsContent/Terminal/Terminal.tsx | 5 ++--- .../TabsContent/Terminal/hooks/index.ts | 2 +- 4 files changed, 3 insertions(+), 41 deletions(-) diff --git a/apps/desktop/src/main/terminal-host/session.ts b/apps/desktop/src/main/terminal-host/session.ts index 1202df489ea..9b7c95276c7 100644 --- a/apps/desktop/src/main/terminal-host/session.ts +++ b/apps/desktop/src/main/terminal-host/session.ts @@ -83,7 +83,6 @@ export class Session { private subprocess: ChildProcess | null = null; private subprocessReady = false; - private ptyPid: number | null = null; private emulator: HeadlessEmulator; private attachedClients: Map = new Map(); private clientSocketsWaitingForDrain: Set = new Set(); @@ -587,27 +586,6 @@ export class Session { for (const resolve of waiters) resolve(); } - private async flushEmulatorWrites(timeoutMs?: number): Promise { - if (this.emulatorWriteQueue.length === 0 && !this.emulatorWriteScheduled) { - return; - } - - const flushPromise = new Promise((resolve) => { - this.emulatorFlushWaiters.push(resolve); - this.scheduleEmulatorWrite(); - }); - - if (timeoutMs !== undefined) { - // Race against timeout to prevent indefinite hang with continuous output - await Promise.race([ - flushPromise, - new Promise((resolve) => setTimeout(resolve, timeoutMs)), - ]); - } else { - await flushPromise; - } - } - /** * Flush emulator writes up to current queue position (snapshot boundary). * Unlike flushEmulatorWrites, this captures a consistent point-in-time state diff --git a/apps/desktop/src/main/terminal-host/terminal-host.ts b/apps/desktop/src/main/terminal-host/terminal-host.ts index 57d199c253c..5fb7f49c667 100644 --- a/apps/desktop/src/main/terminal-host/terminal-host.ts +++ b/apps/desktop/src/main/terminal-host/terminal-host.ts @@ -270,21 +270,6 @@ export class TerminalHost { this.sessions.clear(); } - // =========================================================================== - // Private Methods - // =========================================================================== - - /** - * Get a session by ID, throw if not found - */ - private getSession(sessionId: string): Session { - const session = this.sessions.get(sessionId); - if (!session) { - throw new Error(`Session not found: ${sessionId}`); - } - return session; - } - /** * Get an active (attachable) session by ID. * Throws if session doesn't exist or is terminating. diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx index 791240221de..91a6fb34247 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/Terminal.tsx @@ -319,7 +319,6 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { } } } - // biome-ignore lint/correctness/useExhaustiveDependencies: refs used intentionally to avoid recreating callback }, [setConnectionError]); // biome-ignore lint/correctness/useExhaustiveDependencies: refs (resizeRef, updateCwdRef, rendererRef) used intentionally to read latest values without recreating callback @@ -412,9 +411,9 @@ export const Terminal = ({ tabId, workspaceId }: TerminalProps) => { // Filter out alt-screen sequences since we already entered const ESC = "\x1b"; const filteredRehydrate = result.snapshot.rehydrateSequences - .split(ESC + "[?1049h") + .split(`${ESC}[?1049h`) .join("") - .split(ESC + "[?47h") + .split(`${ESC}[?47h`) .join(""); if (filteredRehydrate) { xterm.write(filteredRehydrate); diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts index 7b3a4dcbde0..dc089375c36 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/Terminal/hooks/index.ts @@ -1,2 +1,2 @@ -export { useTerminalConnection } from "./useTerminalConnection"; export type { UseTerminalConnectionOptions } from "./useTerminalConnection"; +export { useTerminalConnection } from "./useTerminalConnection"; From fa8a9d57eb11e33ad73d45139a98ff58fac3cb6d Mon Sep 17 00:00:00 2001 From: Andreas Asprou Date: Sat, 3 Jan 2026 10:29:37 +0200 Subject: [PATCH 51/51] feat(desktop): add 3-color workspace status indicators MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implements workspace status indicators showing agent lifecycle states: - Amber (pulsing): Agent actively processing - Red (pulsing): Agent blocked, needs user input - Green (static): Agent completed, ready for review Key features: - Status aggregation: workspace shows highest-priority status across all panes - Click behavior: review → idle, permission → working, working unchanged - App restart: stale 'working' status cleared on startup - Migration: old needsAttention boolean migrated to status enum Dev/prod separation hardening: - Removed global OpenCode plugin write (was causing cross-talk) - Added startup cleanup for stale global plugins - Server ignores unknown event types (forward compatibility) - notify.sh no longer defaults to 'Stop' on parse failure - Added SUPERSET_ENV and SUPERSET_HOOK_VERSION to terminal environment - Server validates environment and logs mismatches --- apps/desktop/docs/EXTERNAL_FILES.md | 99 +++++++++++++ .../src/lib/trpc/routers/notifications.ts | 19 +-- .../main/lib/agent-setup/agent-wrappers.ts | 57 ++++++-- .../desktop/src/main/lib/agent-setup/index.ts | 4 + .../src/main/lib/agent-setup/notify-hook.ts | 19 ++- .../src/main/lib/notifications/server.test.ts | 41 ++++++ .../src/main/lib/notifications/server.ts | 134 ++++++++++++++++-- .../desktop/src/main/lib/terminal/env.test.ts | 12 ++ apps/desktop/src/main/lib/terminal/env.ts | 18 ++- apps/desktop/src/main/windows/main.ts | 11 +- .../TopBar/WorkspaceTabs/WorkspaceItem.tsx | 50 +++++-- .../WorkspaceListItem/WorkspaceListItem.tsx | 50 +++++-- .../TabsContent/GroupStrip/GroupStrip.tsx | 49 +++++-- .../Sidebar/TabsView/TabItem/index.tsx | 39 ++++- .../desktop/src/renderer/stores/tabs/store.ts | 85 ++++++++--- .../desktop/src/renderer/stores/tabs/types.ts | 14 +- .../stores/tabs/useAgentHookListener.ts | 37 +++-- apps/desktop/src/shared/constants.ts | 2 +- apps/desktop/src/shared/tabs-types.ts | 11 +- 19 files changed, 630 insertions(+), 121 deletions(-) create mode 100644 apps/desktop/docs/EXTERNAL_FILES.md create mode 100644 apps/desktop/src/main/lib/notifications/server.test.ts diff --git a/apps/desktop/docs/EXTERNAL_FILES.md b/apps/desktop/docs/EXTERNAL_FILES.md new file mode 100644 index 00000000000..9e3f5d0fca9 --- /dev/null +++ b/apps/desktop/docs/EXTERNAL_FILES.md @@ -0,0 +1,99 @@ +# External Files Written by Superset Desktop + +This document lists all files written by the Superset desktop app outside of user projects. +Understanding these files is critical for maintaining dev/prod separation and avoiding conflicts. + +## Environment-Specific Directories + +The app uses different home directories based on environment: +- **Development**: `~/.superset-dev/` +- **Production**: `~/.superset/` + +This separation prevents dev and prod from interfering with each other. + +## Files in `~/.superset[-dev]/` + +### `bin/` - Agent Wrapper Scripts + +| File | Purpose | +|------|---------| +| `claude` | Wrapper for Claude Code CLI that injects notification hooks | +| `codex` | Wrapper for Codex CLI that injects notification hooks | +| `opencode` | Wrapper for OpenCode CLI that sets `OPENCODE_CONFIG_DIR` | + +These wrappers are added to `PATH` via shell integration, allowing them to intercept +agent commands and inject Superset-specific configuration. + +### `hooks/` - Notification Hook Scripts + +| File | Purpose | +|------|---------| +| `notify.sh` | Shell script called by agents when they complete or need input | +| `claude-settings.json` | Claude Code settings file with hook configuration | +| `opencode/plugin/superset-notify.js` | OpenCode plugin for lifecycle events | + +### `zsh/` and `bash/` - Shell Integration + +| File | Purpose | +|------|---------| +| `init.zsh` | Zsh initialization script (sources .zshrc, sets up PATH) | +| `init.bash` | Bash initialization script (sources .bashrc, sets up PATH) | + +## Global Files (AVOID ADDING NEW ONES) + +**DO NOT write to global locations** like `~/.config/`, `~/Library/`, etc. +These cause dev/prod conflicts when both environments are running. + +### Known Issues with Global Files + +Previously, the OpenCode plugin was written to `~/.config/opencode/plugin/superset-notify.js`. +This caused severe issues: +1. Dev would overwrite prod's plugin with incompatible protocol +2. Prod terminals would send events that dev's server couldn't handle +3. Users received spam notifications for every agent message + +**Solution**: The global plugin is no longer written. On startup, any stale global plugin +with our marker is deleted to prevent conflicts from older versions. + +## Shell RC File Modifications + +The app modifies shell RC files to add the Superset bin directory to PATH: + +| Shell | RC File | Modification | +|-------|---------|--------------| +| Zsh | `~/.zshrc` | Prepends `~/.superset[-dev]/bin` to PATH | +| Bash | `~/.bashrc` | Prepends `~/.superset[-dev]/bin` to PATH | + +## Terminal Environment Variables + +Each terminal session receives these environment variables: + +| Variable | Purpose | +|----------|---------| +| `SUPERSET_PANE_ID` | Unique identifier for the terminal pane | +| `SUPERSET_TAB_ID` | Identifier for the containing tab | +| `SUPERSET_WORKSPACE_ID` | Identifier for the workspace | +| `SUPERSET_WORKSPACE_NAME` | Human-readable workspace name | +| `SUPERSET_WORKSPACE_PATH` | Filesystem path to the workspace | +| `SUPERSET_ROOT_PATH` | Root path of the project | +| `SUPERSET_PORT` | Port for the notification server | +| `SUPERSET_ENV` | Environment (`development` or `production`) | +| `SUPERSET_HOOK_VERSION` | Hook protocol version for compatibility | + +## Adding New External Files + +Before adding new files outside of `~/.superset[-dev]/`: + +1. **Consider if it's necessary** - Can you use the environment-specific directory instead? +2. **Check for conflicts** - Will dev and prod overwrite each other? +3. **Update this document** - Add the file to the appropriate section +4. **Add cleanup logic** - If migrating from global to local, clean up the old location + +## Debugging Cross-Environment Issues + +If you suspect dev/prod cross-talk: + +1. Check logs for "Environment mismatch" warnings +2. Verify `SUPERSET_ENV` and `SUPERSET_PORT` are set correctly in terminal +3. Delete stale global files: `rm -rf ~/.config/opencode/plugin/superset-notify.js` +4. Restart both dev and prod apps to regenerate hooks diff --git a/apps/desktop/src/lib/trpc/routers/notifications.ts b/apps/desktop/src/lib/trpc/routers/notifications.ts index eb539b8122a..f90d264b6f6 100644 --- a/apps/desktop/src/lib/trpc/routers/notifications.ts +++ b/apps/desktop/src/lib/trpc/routers/notifications.ts @@ -1,6 +1,6 @@ import { observable } from "@trpc/server/observable"; import { - type AgentCompleteEvent, + type AgentLifecycleEvent, type NotificationIds, notificationsEmitter, } from "main/lib/notifications/server"; @@ -9,8 +9,8 @@ import { publicProcedure, router } from ".."; type NotificationEvent = | { - type: typeof NOTIFICATION_EVENTS.AGENT_COMPLETE; - data?: AgentCompleteEvent; + type: typeof NOTIFICATION_EVENTS.AGENT_LIFECYCLE; + data?: AgentLifecycleEvent; } | { type: typeof NOTIFICATION_EVENTS.FOCUS_TAB; data?: NotificationIds }; @@ -18,21 +18,24 @@ export const createNotificationsRouter = () => { return router({ subscribe: publicProcedure.subscription(() => { return observable((emit) => { - const onComplete = (data: AgentCompleteEvent) => { - emit.next({ type: NOTIFICATION_EVENTS.AGENT_COMPLETE, data }); + const onLifecycle = (data: AgentLifecycleEvent) => { + emit.next({ type: NOTIFICATION_EVENTS.AGENT_LIFECYCLE, data }); }; const onFocusTab = (data: NotificationIds) => { emit.next({ type: NOTIFICATION_EVENTS.FOCUS_TAB, data }); }; - notificationsEmitter.on(NOTIFICATION_EVENTS.AGENT_COMPLETE, onComplete); + notificationsEmitter.on( + NOTIFICATION_EVENTS.AGENT_LIFECYCLE, + onLifecycle, + ); notificationsEmitter.on(NOTIFICATION_EVENTS.FOCUS_TAB, onFocusTab); return () => { notificationsEmitter.off( - NOTIFICATION_EVENTS.AGENT_COMPLETE, - onComplete, + NOTIFICATION_EVENTS.AGENT_LIFECYCLE, + onLifecycle, ); notificationsEmitter.off(NOTIFICATION_EVENTS.FOCUS_TAB, onFocusTab); }; diff --git a/apps/desktop/src/main/lib/agent-setup/agent-wrappers.ts b/apps/desktop/src/main/lib/agent-setup/agent-wrappers.ts index 0ced8cdacb6..349cdf2895c 100644 --- a/apps/desktop/src/main/lib/agent-setup/agent-wrappers.ts +++ b/apps/desktop/src/main/lib/agent-setup/agent-wrappers.ts @@ -12,7 +12,7 @@ import { export const WRAPPER_MARKER = "# Superset agent-wrapper v1"; export const CLAUDE_SETTINGS_FILE = "claude-settings.json"; export const OPENCODE_PLUGIN_FILE = "superset-notify.js"; -export const OPENCODE_PLUGIN_MARKER = "// Superset opencode plugin v3"; +export const OPENCODE_PLUGIN_MARKER = "// Superset opencode plugin v4"; const REAL_BINARY_RESOLVER = `find_real_binary() { local name="$1" @@ -72,6 +72,7 @@ export function getOpenCodeGlobalPluginPath(): string { export function getClaudeSettingsContent(notifyPath: string): string { const settings = { hooks: { + UserPromptSubmit: [{ hooks: [{ type: "command", command: notifyPath }] }], Stop: [{ hooks: [{ type: "command", command: notifyPath }] }], PermissionRequest: [ { matcher: "*", hooks: [{ type: "command", command: notifyPath }] }, @@ -144,7 +145,7 @@ export function getOpenCodePluginContent(notifyPath: string): string { " * Superset Notification Plugin for OpenCode", " *", " * This plugin sends desktop notifications when OpenCode sessions need attention.", - " * It hooks into session.idle, session.error, and permission.ask events.", + " * It hooks into session.status (busy/idle), session.error, and permission.ask events.", " *", " * IMPORTANT: Subagent/Background Task Filtering", " * --------------------------------------------", @@ -164,8 +165,8 @@ export function getOpenCodePluginContent(notifyPath: string): string { " * @see https://github.com/sst/opencode/blob/dev/packages/app/src/context/notification.tsx", " */", "export const SupersetNotifyPlugin = async ({ $, client }) => {", - " if (globalThis.__supersetOpencodeNotifyPluginV3) return {};", - " globalThis.__supersetOpencodeNotifyPluginV3 = true;", + " if (globalThis.__supersetOpencodeNotifyPluginV4) return {};", + " globalThis.__supersetOpencodeNotifyPluginV4 = true;", "", " // Only run inside a Superset terminal session", " if (!process?.env?.SUPERSET_TAB_ID) return {};", @@ -216,16 +217,29 @@ export function getOpenCodePluginContent(notifyPath: string): string { "", " return {", " event: async ({ event }) => {", - " // Handle session completion events", - ' if (event.type === "session.idle" || event.type === "session.error") {', + " // Handle session status changes (busy = working, idle = done)", + ' if (event.type === "session.status") {', " const sessionID = event.properties?.sessionID;", + " const status = event.properties?.status;", "", " // Skip notifications for child/subagent sessions", - " // This prevents notification spam when background agents complete", " if (await isChildSession(sessionID)) {", " return;", " }", "", + ' if (status?.type === "busy") {', + ' await notify("Start");', + ' } else if (status?.type === "idle") {', + ' await notify("Stop");', + " }", + " }", + "", + " // Handle session errors (also means session stopped)", + ' if (event.type === "session.error") {', + " const sessionID = event.properties?.sessionID;", + " if (await isChildSession(sessionID)) {", + " return;", + " }", ' await notify("Stop");', " }", " },", @@ -275,24 +289,43 @@ export function createCodexWrapper(): void { } /** - * Creates OpenCode plugin file with notification hooks + * Creates OpenCode plugin file with notification hooks. + * Only writes to environment-specific path - NOT the global path. + * Global path causes dev/prod conflicts when both are running. */ export function createOpenCodePlugin(): void { const pluginPath = getOpenCodePluginPath(); const notifyPath = getNotifyScriptPath(); const content = getOpenCodePluginContent(notifyPath); fs.writeFileSync(pluginPath, content, { mode: 0o644 }); + console.log("[agent-setup] Created OpenCode plugin"); +} + +/** + * Cleans up stale global OpenCode plugin that may have been written by older versions. + * Only removes if the file contains our marker to avoid deleting user-installed plugins. + * This prevents dev/prod cross-talk when both environments are running. + */ +export function cleanupGlobalOpenCodePlugin(): void { try { const globalPluginPath = getOpenCodeGlobalPluginPath(); - fs.mkdirSync(path.dirname(globalPluginPath), { recursive: true }); - fs.writeFileSync(globalPluginPath, content, { mode: 0o644 }); + if (!fs.existsSync(globalPluginPath)) return; + + const content = fs.readFileSync(globalPluginPath, "utf-8"); + // Check for any version of our marker (v1, v2, v3, v4, etc.) + if (content.includes("// Superset opencode plugin")) { + fs.unlinkSync(globalPluginPath); + console.log( + "[agent-setup] Removed stale global OpenCode plugin to prevent dev/prod conflicts", + ); + } } catch (error) { + // Ignore errors - this is best-effort cleanup console.warn( - "[agent-setup] Failed to write global OpenCode plugin:", + "[agent-setup] Failed to cleanup global OpenCode plugin:", error, ); } - console.log("[agent-setup] Created OpenCode plugin"); } /** diff --git a/apps/desktop/src/main/lib/agent-setup/index.ts b/apps/desktop/src/main/lib/agent-setup/index.ts index d0ac5cb3ea4..e2ca3b6c82a 100644 --- a/apps/desktop/src/main/lib/agent-setup/index.ts +++ b/apps/desktop/src/main/lib/agent-setup/index.ts @@ -1,5 +1,6 @@ import fs from "node:fs"; import { + cleanupGlobalOpenCodePlugin, createClaudeWrapper, createCodexWrapper, createOpenCodePlugin, @@ -34,6 +35,9 @@ export function setupAgentHooks(): void { fs.mkdirSync(BASH_DIR, { recursive: true }); fs.mkdirSync(OPENCODE_PLUGIN_DIR, { recursive: true }); + // Clean up stale global plugins that may cause dev/prod conflicts + cleanupGlobalOpenCodePlugin(); + // Create scripts createNotifyScript(); createClaudeWrapper(); diff --git a/apps/desktop/src/main/lib/agent-setup/notify-hook.ts b/apps/desktop/src/main/lib/agent-setup/notify-hook.ts index c583486a9a5..6940eca38f4 100644 --- a/apps/desktop/src/main/lib/agent-setup/notify-hook.ts +++ b/apps/desktop/src/main/lib/agent-setup/notify-hook.ts @@ -26,17 +26,26 @@ else fi # Extract event type - Claude uses "hook_event_name", Codex uses "type" -EVENT_TYPE=$(echo "$INPUT" | grep -o '"hook_event_name":"[^"]*"' | cut -d'"' -f4) +# Use flexible pattern to handle optional whitespace: "key": "value" or "key":"value" +EVENT_TYPE=$(echo "$INPUT" | grep -oE '"hook_event_name"[[:space:]]*:[[:space:]]*"[^"]*"' | grep -oE '"[^"]*"$' | tr -d '"') if [ -z "$EVENT_TYPE" ]; then # Check for Codex "type" field (e.g., "agent-turn-complete") - CODEX_TYPE=$(echo "$INPUT" | grep -o '"type":"[^"]*"' | cut -d'"' -f4) + CODEX_TYPE=$(echo "$INPUT" | grep -oE '"type"[[:space:]]*:[[:space:]]*"[^"]*"' | grep -oE '"[^"]*"$' | tr -d '"') if [ "$CODEX_TYPE" = "agent-turn-complete" ]; then EVENT_TYPE="Stop" fi fi -# Default to "Stop" if not found -[ -z "$EVENT_TYPE" ] && EVENT_TYPE="Stop" +# NOTE: We intentionally do NOT default to "Stop" if EVENT_TYPE is empty. +# Parse failures should not trigger completion notifications. +# The server will ignore requests with missing eventType (forward compatibility). + +# Map UserPromptSubmit to Start for simpler handling +[ "$EVENT_TYPE" = "UserPromptSubmit" ] && EVENT_TYPE="Start" + +# If no event type was found, skip the notification +# This prevents parse failures from causing false completion notifications +[ -z "$EVENT_TYPE" ] && exit 0 # Timeouts prevent blocking agent completion if notification server is unresponsive curl -sG "http://127.0.0.1:\${SUPERSET_PORT:-${PORTS.NOTIFICATIONS}}/hook/complete" \\ @@ -45,6 +54,8 @@ curl -sG "http://127.0.0.1:\${SUPERSET_PORT:-${PORTS.NOTIFICATIONS}}/hook/comple --data-urlencode "tabId=$SUPERSET_TAB_ID" \\ --data-urlencode "workspaceId=$SUPERSET_WORKSPACE_ID" \\ --data-urlencode "eventType=$EVENT_TYPE" \\ + --data-urlencode "env=$SUPERSET_ENV" \\ + --data-urlencode "version=$SUPERSET_HOOK_VERSION" \\ > /dev/null 2>&1 `; } diff --git a/apps/desktop/src/main/lib/notifications/server.test.ts b/apps/desktop/src/main/lib/notifications/server.test.ts new file mode 100644 index 00000000000..94e095508e9 --- /dev/null +++ b/apps/desktop/src/main/lib/notifications/server.test.ts @@ -0,0 +1,41 @@ +import { describe, expect, it } from "bun:test"; +import { mapEventType } from "./server"; + +describe("notifications/server", () => { + describe("mapEventType", () => { + it("should map 'Start' to 'Start'", () => { + expect(mapEventType("Start")).toBe("Start"); + }); + + it("should map 'UserPromptSubmit' to 'Start'", () => { + expect(mapEventType("UserPromptSubmit")).toBe("Start"); + }); + + it("should map 'Stop' to 'Stop'", () => { + expect(mapEventType("Stop")).toBe("Stop"); + }); + + it("should map 'agent-turn-complete' to 'Stop'", () => { + expect(mapEventType("agent-turn-complete")).toBe("Stop"); + }); + + it("should map 'PermissionRequest' to 'PermissionRequest'", () => { + expect(mapEventType("PermissionRequest")).toBe("PermissionRequest"); + }); + + it("should return null for unknown event types (forward compatibility)", () => { + expect(mapEventType("UnknownEvent")).toBeNull(); + expect(mapEventType("FutureEvent")).toBeNull(); + expect(mapEventType("SomeNewHook")).toBeNull(); + }); + + it("should return null for undefined eventType (not default to Stop)", () => { + // This is critical: missing eventType should NOT trigger a completion notification + expect(mapEventType(undefined)).toBeNull(); + }); + + it("should return null for empty string eventType", () => { + expect(mapEventType("")).toBeNull(); + }); + }); +}); diff --git a/apps/desktop/src/main/lib/notifications/server.ts b/apps/desktop/src/main/lib/notifications/server.ts index a27398d46f0..3c72e753a1f 100644 --- a/apps/desktop/src/main/lib/notifications/server.ts +++ b/apps/desktop/src/main/lib/notifications/server.ts @@ -1,6 +1,15 @@ import { EventEmitter } from "node:events"; import express from "express"; import { NOTIFICATION_EVENTS } from "shared/constants"; +import { env } from "shared/env.shared"; +import { appState } from "../app-state"; + +/** + * The environment this server is running in. + * Used to validate incoming hook requests and detect cross-environment issues. + */ +const SERVER_ENV = + env.NODE_ENV === "development" ? "development" : "production"; export interface NotificationIds { paneId?: string; @@ -8,8 +17,8 @@ export interface NotificationIds { workspaceId?: string; } -export interface AgentCompleteEvent extends NotificationIds { - eventType: "Stop" | "PermissionRequest"; +export interface AgentLifecycleEvent extends NotificationIds { + eventType: "Start" | "Stop" | "PermissionRequest"; } export const notificationsEmitter = new EventEmitter(); @@ -29,20 +38,127 @@ app.use((req, res, next) => { next(); }); -// Agent completion hook +/** + * Maps incoming event types to canonical lifecycle events. + * Handles variations from different agent CLIs. + * + * Returns null for unknown events - caller should ignore these gracefully + * to maintain forward compatibility with newer hook versions. + * + * Note: We no longer default missing eventType to "Stop" to prevent + * parse failures from being treated as completions. + * + * @internal Exported for testing + */ +export function mapEventType( + eventType: string | undefined, +): "Start" | "Stop" | "PermissionRequest" | null { + if (!eventType) { + return null; // Missing eventType should be ignored, not treated as Stop + } + if (eventType === "Start" || eventType === "UserPromptSubmit") { + return "Start"; + } + if (eventType === "PermissionRequest") { + return "PermissionRequest"; + } + if (eventType === "Stop" || eventType === "agent-turn-complete") { + return "Stop"; + } + return null; // Unknown events are ignored for forward compatibility +} + +/** + * Resolves paneId from tabId or workspaceId using synced tabs state. + * Falls back to focused pane in active tab. + */ +function resolvePaneId( + paneId: string | undefined, + tabId: string | undefined, + workspaceId: string | undefined, +): string | undefined { + if (paneId) return paneId; + + try { + const tabsState = appState.data.tabsState; + if (!tabsState) return undefined; + + // Try to resolve from tabId + if (tabId) { + const focusedPaneId = tabsState.focusedPaneIds?.[tabId]; + if (focusedPaneId) return focusedPaneId; + } + + // Try to resolve from workspaceId + if (workspaceId) { + const activeTabId = tabsState.activeTabIds?.[workspaceId]; + if (activeTabId) { + const focusedPaneId = tabsState.focusedPaneIds?.[activeTabId]; + if (focusedPaneId) return focusedPaneId; + } + } + } catch { + // App state not initialized yet, ignore + } + + return undefined; +} + +// Agent lifecycle hook app.get("/hook/complete", (req, res) => { - const { paneId, tabId, workspaceId, eventType } = req.query; + const { + paneId, + tabId, + workspaceId, + eventType, + env: clientEnv, + version, + } = req.query; + + // Environment validation: detect dev/prod cross-talk + // We still return success to not block the agent, but log a warning + if (clientEnv && clientEnv !== SERVER_ENV) { + console.warn( + `[notifications] Environment mismatch: received ${clientEnv} request on ${SERVER_ENV} server. ` + + `This may indicate a stale hook or misconfigured terminal. Ignoring request.`, + ); + return res.json({ success: true, ignored: true, reason: "env_mismatch" }); + } + + // Log version for debugging (helpful when troubleshooting hook issues) + if (version && version !== "2") { + console.log( + `[notifications] Received hook v${version} request (server expects v2)`, + ); + } + + const mappedEventType = mapEventType(eventType as string | undefined); + + // Unknown or missing eventType: return success but don't process + // This ensures forward compatibility and doesn't block the agent + if (!mappedEventType) { + if (eventType) { + console.log("[notifications] Ignoring unknown eventType:", eventType); + } + return res.json({ success: true, ignored: true }); + } + + const resolvedPaneId = resolvePaneId( + paneId as string | undefined, + tabId as string | undefined, + workspaceId as string | undefined, + ); - const event: AgentCompleteEvent = { - paneId: paneId as string | undefined, + const event: AgentLifecycleEvent = { + paneId: resolvedPaneId, tabId: tabId as string | undefined, workspaceId: workspaceId as string | undefined, - eventType: eventType === "PermissionRequest" ? "PermissionRequest" : "Stop", + eventType: mappedEventType, }; - notificationsEmitter.emit(NOTIFICATION_EVENTS.AGENT_COMPLETE, event); + notificationsEmitter.emit(NOTIFICATION_EVENTS.AGENT_LIFECYCLE, event); - res.json({ success: true, paneId, tabId }); + res.json({ success: true, paneId: resolvedPaneId, tabId }); }); // Health check diff --git a/apps/desktop/src/main/lib/terminal/env.test.ts b/apps/desktop/src/main/lib/terminal/env.test.ts index f8fb5b1e5fd..57946088e55 100644 --- a/apps/desktop/src/main/lib/terminal/env.test.ts +++ b/apps/desktop/src/main/lib/terminal/env.test.ts @@ -177,5 +177,17 @@ describe("env", () => { expect(result.SUPERSET_PORT).toBeDefined(); expect(typeof result.SUPERSET_PORT).toBe("string"); }); + + it("should include SUPERSET_ENV for dev/prod separation", () => { + const result = buildTerminalEnv(baseParams); + expect(result.SUPERSET_ENV).toBeDefined(); + expect(["development", "production"]).toContain(result.SUPERSET_ENV); + }); + + it("should include SUPERSET_HOOK_VERSION for protocol versioning", () => { + const result = buildTerminalEnv(baseParams); + expect(result.SUPERSET_HOOK_VERSION).toBeDefined(); + expect(result.SUPERSET_HOOK_VERSION).toBe("2"); + }); }); }); diff --git a/apps/desktop/src/main/lib/terminal/env.ts b/apps/desktop/src/main/lib/terminal/env.ts index d5931a908f1..d491f215d91 100644 --- a/apps/desktop/src/main/lib/terminal/env.ts +++ b/apps/desktop/src/main/lib/terminal/env.ts @@ -2,8 +2,16 @@ import { execSync } from "node:child_process"; import os from "node:os"; import defaultShell from "default-shell"; import { PORTS } from "shared/constants"; +import { env } from "shared/env.shared"; import { getShellEnv } from "../agent-setup/shell-wrappers"; +/** + * Current hook protocol version. + * Increment when making breaking changes to the hook protocol. + * The server logs this for debugging version mismatches. + */ +export const HOOK_PROTOCOL_VERSION = "2"; + export const FALLBACK_SHELL = os.platform() === "win32" ? "cmd.exe" : "/bin/sh"; export const SHELL_CRASH_THRESHOLD_MS = 1000; @@ -86,7 +94,7 @@ export function buildTerminalEnv(params: { const shellEnv = getShellEnv(shell); const locale = getLocale(baseEnv); - const env: Record = { + const terminalEnv: Record = { ...baseEnv, ...shellEnv, TERM_PROGRAM: "Superset", @@ -100,9 +108,13 @@ export function buildTerminalEnv(params: { SUPERSET_WORKSPACE_PATH: workspacePath || "", SUPERSET_ROOT_PATH: rootPath || "", SUPERSET_PORT: String(PORTS.NOTIFICATIONS), + // Environment identifier for dev/prod separation + SUPERSET_ENV: env.NODE_ENV === "development" ? "development" : "production", + // Hook protocol version for forward compatibility + SUPERSET_HOOK_VERSION: HOOK_PROTOCOL_VERSION, }; - delete env.GOOGLE_API_KEY; + delete terminalEnv.GOOGLE_API_KEY; - return env; + return terminalEnv; } diff --git a/apps/desktop/src/main/windows/main.ts b/apps/desktop/src/main/windows/main.ts index 966e84614c1..ba393a6208a 100644 --- a/apps/desktop/src/main/windows/main.ts +++ b/apps/desktop/src/main/windows/main.ts @@ -13,7 +13,7 @@ import { appState } from "../lib/app-state"; import { createApplicationMenu, registerMenuHotkeyUpdates } from "../lib/menu"; import { playNotificationSound } from "../lib/notification-sound"; import { - type AgentCompleteEvent, + type AgentLifecycleEvent, notificationsApp, notificationsEmitter, } from "../lib/notifications/server"; @@ -78,10 +78,13 @@ export async function MainWindow() { }, ); - // Handle agent completion notifications + // Handle agent lifecycle notifications (Stop = completion, PermissionRequest = needs input) notificationsEmitter.on( - NOTIFICATION_EVENTS.AGENT_COMPLETE, - (event: AgentCompleteEvent) => { + NOTIFICATION_EVENTS.AGENT_LIFECYCLE, + (event: AgentLifecycleEvent) => { + // Only notify on Stop (completion) and PermissionRequest - not on Start + if (event.eventType === "Start") return; + if (Notification.isSupported()) { const isPermissionRequest = event.eventType === "PermissionRequest"; diff --git a/apps/desktop/src/renderer/screens/main/components/TopBar/WorkspaceTabs/WorkspaceItem.tsx b/apps/desktop/src/renderer/screens/main/components/TopBar/WorkspaceTabs/WorkspaceItem.tsx index b98e36c98c2..e8980dd352d 100644 --- a/apps/desktop/src/renderer/screens/main/components/TopBar/WorkspaceTabs/WorkspaceItem.tsx +++ b/apps/desktop/src/renderer/screens/main/components/TopBar/WorkspaceTabs/WorkspaceItem.tsx @@ -56,8 +56,8 @@ export function WorkspaceItem({ const closeSettings = useCloseSettings(); const tabs = useTabsStore((s) => s.tabs); const panes = useTabsStore((s) => s.panes); - const clearWorkspaceAttention = useTabsStore( - (s) => s.clearWorkspaceAttention, + const clearWorkspaceAttentionStatus = useTabsStore( + (s) => s.clearWorkspaceAttentionStatus, ); const rename = useWorkspaceRename(id, title); @@ -65,17 +65,30 @@ export function WorkspaceItem({ const { showDeleteDialog, setShowDeleteDialog, handleDeleteClick } = useWorkspaceDeleteHandler(); - // Check if any pane in tabs belonging to this workspace needs attention (agent notifications) + // Derive aggregate status from panes in this workspace + // Priority: permission (red) > working (amber) > review (green) const workspaceTabs = tabs.filter((t) => t.workspaceId === id); const workspacePaneIds = new Set( workspaceTabs.flatMap((t) => extractPaneIdsFromLayout(t.layout)), ); - const hasPaneAttention = Object.values(panes) - .filter((p) => workspacePaneIds.has(p.id)) - .some((p) => p.needsAttention); + const workspacePanes = Object.values(panes).filter((p) => + workspacePaneIds.has(p.id), + ); + + const hasPermission = workspacePanes.some((p) => p.status === "permission"); + const hasWorking = workspacePanes.some((p) => p.status === "working"); + const hasReview = workspacePanes.some((p) => p.status === "review"); - // Show indicator if workspace is manually marked as unread OR has pane-level attention - const needsAttention = isUnread || hasPaneAttention; + // Aggregate status for the workspace (priority order) + const aggregateStatus = hasPermission + ? "permission" + : hasWorking + ? "working" + : hasReview + ? "review" + : isUnread + ? "review" // isUnread maps to review color + : null; const [{ isDragging }, drag] = useDrag( () => ({ @@ -128,7 +141,7 @@ export function WorkspaceItem({ if (!rename.isRenaming) { closeSettings(); setActive.mutate({ id }); - clearWorkspaceAttention(id); + clearWorkspaceAttentionStatus(id); } }} onDoubleClick={isBranchWorkspace ? undefined : rename.startRename} @@ -208,10 +221,23 @@ export function WorkspaceItem({ > {title} - {needsAttention && ( + {aggregateStatus && ( - - + {aggregateStatus === "permission" && ( + <> + + + + )} + {aggregateStatus === "working" && ( + <> + + + + )} + {aggregateStatus === "review" && ( + + )} )} diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceSidebar/WorkspaceListItem/WorkspaceListItem.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceSidebar/WorkspaceListItem/WorkspaceListItem.tsx index 9a1ca16b45d..804bbf7e098 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceSidebar/WorkspaceListItem/WorkspaceListItem.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceSidebar/WorkspaceListItem/WorkspaceListItem.tsx @@ -73,8 +73,8 @@ export function WorkspaceListItem({ const rename = useWorkspaceRename(id, name); const tabs = useTabsStore((s) => s.tabs); const panes = useTabsStore((s) => s.panes); - const clearWorkspaceAttention = useTabsStore( - (s) => s.clearWorkspaceAttention, + const clearWorkspaceAttentionStatus = useTabsStore( + (s) => s.clearWorkspaceAttentionStatus, ); const utils = trpc.useUtils(); const openInFinder = trpc.external.openInFinder.useMutation(); @@ -97,22 +97,35 @@ export function WorkspaceListItem({ }, ); - // Check if any pane in tabs belonging to this workspace needs attention (agent notifications) + // Derive aggregate status from panes in this workspace + // Priority: permission (red) > working (amber) > review (green) const workspaceTabs = tabs.filter((t) => t.workspaceId === id); const workspacePaneIds = new Set( workspaceTabs.flatMap((t) => extractPaneIdsFromLayout(t.layout)), ); - const hasPaneAttention = Object.values(panes) - .filter((p) => workspacePaneIds.has(p.id)) - .some((p) => p.needsAttention); + const workspacePanes = Object.values(panes).filter((p) => + workspacePaneIds.has(p.id), + ); + + const hasPermission = workspacePanes.some((p) => p.status === "permission"); + const hasWorking = workspacePanes.some((p) => p.status === "working"); + const hasReview = workspacePanes.some((p) => p.status === "review"); - // Show indicator if workspace is manually marked as unread OR has pane-level attention - const needsAttention = isUnread || hasPaneAttention; + // Aggregate status for the workspace (priority order) + const aggregateStatus = hasPermission + ? "permission" + : hasWorking + ? "working" + : hasReview + ? "review" + : isUnread + ? "review" // isUnread maps to review color + : null; const handleClick = () => { if (!rename.isRenaming) { setActiveWorkspace.mutate({ id }); - clearWorkspaceAttention(id); + clearWorkspaceAttentionStatus(id); } }; @@ -214,10 +227,23 @@ export function WorkspaceListItem({ {pr && ( )} - {needsAttention && ( + {aggregateStatus && ( - - + {aggregateStatus === "permission" && ( + <> + + + + )} + {aggregateStatus === "working" && ( + <> + + + + )} + {aggregateStatus === "review" && ( + + )} )} diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/GroupStrip/GroupStrip.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/GroupStrip/GroupStrip.tsx index 77790ae7b88..4159ed7bb7f 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/GroupStrip/GroupStrip.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/ContentView/TabsContent/GroupStrip/GroupStrip.tsx @@ -5,13 +5,13 @@ import { useMemo } from "react"; import { HiMiniPlus, HiMiniXMark } from "react-icons/hi2"; import { trpc } from "renderer/lib/trpc"; import { useTabsStore } from "renderer/stores/tabs/store"; -import type { Tab } from "renderer/stores/tabs/types"; +import type { PaneStatus, Tab } from "renderer/stores/tabs/types"; import { getTabDisplayName } from "renderer/stores/tabs/utils"; interface GroupItemProps { tab: Tab; isActive: boolean; - needsAttention: boolean; + status: PaneStatus | null; onSelect: () => void; onClose: () => void; } @@ -19,7 +19,7 @@ interface GroupItemProps { function GroupItem({ tab, isActive, - needsAttention, + status, onSelect, onClose, }: GroupItemProps) { @@ -42,10 +42,23 @@ function GroupItem({ {displayName} - {needsAttention && ( + {status && status !== "idle" && ( - - + {status === "permission" && ( + <> + + + + )} + {status === "working" && ( + <> + + + + )} + {status === "review" && ( + + )} )} @@ -104,12 +117,24 @@ export function GroupStrip() { ? activeTabIds[activeWorkspaceId] : null; - // Check which tabs have panes that need attention - const tabsWithAttention = useMemo(() => { - const result = new Set(); + // Compute aggregate status per tab (priority: permission > working > review) + const tabStatusMap = useMemo(() => { + const result = new Map(); for (const pane of Object.values(panes)) { - if (pane.needsAttention) { - result.add(pane.tabId); + if (!pane.status || pane.status === "idle") continue; + + const currentStatus = result.get(pane.tabId); + // Priority: permission > working > review + if (pane.status === "permission") { + result.set(pane.tabId, "permission"); + } else if (pane.status === "working" && currentStatus !== "permission") { + result.set(pane.tabId, "working"); + } else if ( + pane.status === "review" && + currentStatus !== "permission" && + currentStatus !== "working" + ) { + result.set(pane.tabId, "review"); } } return result; @@ -144,7 +169,7 @@ export function GroupStrip() { handleSelectGroup(tab.id)} onClose={() => handleCloseGroup(tab.id)} /> diff --git a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/Sidebar/TabsView/TabItem/index.tsx b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/Sidebar/TabsView/TabItem/index.tsx index 07a860bed16..774ee9a9061 100644 --- a/apps/desktop/src/renderer/screens/main/components/WorkspaceView/Sidebar/TabsView/TabItem/index.tsx +++ b/apps/desktop/src/renderer/screens/main/components/WorkspaceView/Sidebar/TabsView/TabItem/index.tsx @@ -31,9 +31,15 @@ export function TabItem({ tab, index, isActive }: TabItemProps) { const setActiveTab = useTabsStore((s) => s.setActiveTab); const renameTab = useTabsStore((s) => s.renameTab); const panes = useTabsStore((s) => s.panes); - const needsAttention = useTabsStore((s) => - Object.values(s.panes).some((p) => p.tabId === tab.id && p.needsAttention), - ); + + // Derive aggregate status from panes in this tab (priority: permission > working > review) + const aggregateStatus = useTabsStore((s) => { + const tabPanes = Object.values(s.panes).filter((p) => p.tabId === tab.id); + if (tabPanes.some((p) => p.status === "permission")) return "permission"; + if (tabPanes.some((p) => p.status === "working")) return "working"; + if (tabPanes.some((p) => p.status === "review")) return "review"; + return null; + }); const paneCount = useMemo( () => Object.values(panes).filter((p) => p.tabId === tab.id).length, @@ -190,15 +196,34 @@ export function TabItem({ tab, index, isActive }: TabItemProps) {
{displayName} - {needsAttention && ( + {aggregateStatus && ( - - + {aggregateStatus === "permission" && ( + <> + + + + )} + {aggregateStatus === "working" && ( + <> + + + + )} + {aggregateStatus === "review" && ( + + )} - Agent completed + + {aggregateStatus === "permission" + ? "Needs input" + : aggregateStatus === "working" + ? "Agent working" + : "Ready for review"} + )}
diff --git a/apps/desktop/src/renderer/stores/tabs/store.ts b/apps/desktop/src/renderer/stores/tabs/store.ts index 6e6823d33e0..a9df51456fa 100644 --- a/apps/desktop/src/renderer/stores/tabs/store.ts +++ b/apps/desktop/src/renderer/stores/tabs/store.ts @@ -4,7 +4,12 @@ import { create } from "zustand"; import { devtools, persist } from "zustand/middleware"; import { trpcTabsStorage } from "../../lib/trpc-storage"; import { movePaneToNewTab, movePaneToTab } from "./actions/move-pane"; -import type { AddFileViewerPaneOptions, TabsState, TabsStore } from "./types"; +import type { + AddFileViewerPaneOptions, + PaneStatus, + TabsState, + TabsStore, +} from "./types"; import { type CreatePaneOptions, createFileViewerPane, @@ -199,14 +204,22 @@ export const useTabsStore = create()( ]; } - // Clear needsAttention for the focused pane in the tab being activated - const focusedPaneId = state.focusedPaneIds[tabId]; + // Clear attention status for panes in the selected tab + const tabPaneIds = extractPaneIdsFromLayout(tab.layout); const newPanes = { ...state.panes }; - if (focusedPaneId && newPanes[focusedPaneId]?.needsAttention) { - newPanes[focusedPaneId] = { - ...newPanes[focusedPaneId], - needsAttention: false, - }; + let hasChanges = false; + for (const paneId of tabPaneIds) { + const currentStatus = newPanes[paneId]?.status; + if (currentStatus === "review") { + // User acknowledged completion + newPanes[paneId] = { ...newPanes[paneId], status: "idle" }; + hasChanges = true; + } else if (currentStatus === "permission") { + // Assume permission granted, agent is now working + newPanes[paneId] = { ...newPanes[paneId], status: "working" }; + hasChanges = true; + } + // "working" status is NOT cleared by click - persists until Stop } set({ @@ -218,7 +231,7 @@ export const useTabsStore = create()( ...state.tabHistoryStacks, [workspaceId]: newHistoryStack, }, - panes: newPanes, + ...(hasChanges ? { panes: newPanes } : {}), }); }, @@ -504,20 +517,11 @@ export const useTabsStore = create()( const pane = state.panes[paneId]; if (!pane || pane.tabId !== tabId) return; - // Clear needsAttention for the pane being focused - const newPanes = pane.needsAttention - ? { - ...state.panes, - [paneId]: { ...pane, needsAttention: false }, - } - : state.panes; - set({ focusedPaneIds: { ...state.focusedPaneIds, [tabId]: paneId, }, - panes: newPanes, }); }, @@ -532,18 +536,18 @@ export const useTabsStore = create()( })); }, - setNeedsAttention: (paneId, needsAttention) => { + setPaneStatus: (paneId, status) => { set((state) => ({ panes: { ...state.panes, [paneId]: state.panes[paneId] - ? { ...state.panes[paneId], needsAttention } + ? { ...state.panes[paneId], status } : state.panes[paneId], }, })); }, - clearWorkspaceAttention: (workspaceId) => { + clearWorkspaceAttentionStatus: (workspaceId) => { const state = get(); const workspaceTabs = state.tabs.filter( (t) => t.workspaceId === workspaceId, @@ -559,10 +563,17 @@ export const useTabsStore = create()( const newPanes = { ...state.panes }; let hasChanges = false; for (const paneId of workspacePaneIds) { - if (newPanes[paneId]?.needsAttention) { - newPanes[paneId] = { ...newPanes[paneId], needsAttention: false }; + const currentStatus = newPanes[paneId]?.status; + if (currentStatus === "review") { + // User acknowledged completion + newPanes[paneId] = { ...newPanes[paneId], status: "idle" }; + hasChanges = true; + } else if (currentStatus === "permission") { + // Assume permission granted, Claude is now working + newPanes[paneId] = { ...newPanes[paneId], status: "working" }; hasChanges = true; } + // "working" status is NOT cleared by click - persists until Stop } if (hasChanges) { @@ -774,7 +785,35 @@ export const useTabsStore = create()( }), { name: "tabs-storage", + version: 2, storage: trpcTabsStorage, + migrate: (persistedState, version) => { + const state = persistedState as TabsState; + if (version < 2 && state.panes) { + // Migrate needsAttention → status + for (const pane of Object.values(state.panes)) { + // biome-ignore lint/suspicious/noExplicitAny: migration from old schema + const legacyPane = pane as any; + if (legacyPane.needsAttention === true) { + pane.status = "review"; + } + delete legacyPane.needsAttention; + } + } + return state; + }, + merge: (persistedState, currentState) => { + const persisted = persistedState as TabsState; + // Clear stale "working" status on startup - agent can't be working if app just started + if (persisted.panes) { + for (const pane of Object.values(persisted.panes)) { + if (pane.status === "working") { + pane.status = "idle"; + } + } + } + return { ...currentState, ...persisted }; + }, }, ), { name: "TabsStore" }, diff --git a/apps/desktop/src/renderer/stores/tabs/types.ts b/apps/desktop/src/renderer/stores/tabs/types.ts index 64a298ab958..33c01dfceb6 100644 --- a/apps/desktop/src/renderer/stores/tabs/types.ts +++ b/apps/desktop/src/renderer/stores/tabs/types.ts @@ -1,9 +1,15 @@ import type { MosaicBranch, MosaicNode } from "react-mosaic-component"; import type { ChangeCategory } from "shared/changes-types"; -import type { BaseTab, BaseTabsState, Pane, PaneType } from "shared/tabs-types"; +import type { + BaseTab, + BaseTabsState, + Pane, + PaneStatus, + PaneType, +} from "shared/tabs-types"; // Re-export shared types -export type { Pane, PaneType }; +export type { Pane, PaneStatus, PaneType }; /** * A Tab is a container that holds one or more Panes in a Mosaic layout. @@ -69,8 +75,8 @@ export interface TabsStore extends TabsState { removePane: (paneId: string) => void; setFocusedPane: (tabId: string, paneId: string) => void; markPaneAsUsed: (paneId: string) => void; - setNeedsAttention: (paneId: string, needsAttention: boolean) => void; - clearWorkspaceAttention: (workspaceId: string) => void; + setPaneStatus: (paneId: string, status: PaneStatus) => void; + clearWorkspaceAttentionStatus: (workspaceId: string) => void; updatePaneCwd: ( paneId: string, cwd: string | null, diff --git a/apps/desktop/src/renderer/stores/tabs/useAgentHookListener.ts b/apps/desktop/src/renderer/stores/tabs/useAgentHookListener.ts index 0b158830c49..033e152796d 100644 --- a/apps/desktop/src/renderer/stores/tabs/useAgentHookListener.ts +++ b/apps/desktop/src/renderer/stores/tabs/useAgentHookListener.ts @@ -8,7 +8,7 @@ import { resolveNotificationTarget } from "./utils/resolve-notification-target"; /** * Hook that listens for notification events via tRPC subscription. - * Handles agent completions and focus requests from native notifications. + * Handles agent lifecycle events (Start, Stop, PermissionRequest) and focus requests. */ export function useAgentHookListener() { const setActiveWorkspace = useSetActiveWorkspace(); @@ -28,17 +28,36 @@ export function useAgentHookListener() { const { paneId, workspaceId } = target; - if (event.type === NOTIFICATION_EVENTS.AGENT_COMPLETE) { + if (event.type === NOTIFICATION_EVENTS.AGENT_LIFECYCLE) { if (!paneId) return; - const activeTabId = state.activeTabIds[workspaceId]; - const focusedPaneId = activeTabId && state.focusedPaneIds[activeTabId]; - const isAlreadyActive = - activeWorkspaceRef.current?.id === workspaceId && - focusedPaneId === paneId; + const lifecycleEvent = event.data; + if (!lifecycleEvent) return; - if (!isAlreadyActive) { - state.setNeedsAttention(paneId, true); + const { eventType } = lifecycleEvent; + + if (eventType === "Start") { + // Agent started working - always set to working + state.setPaneStatus(paneId, "working"); + } else if (eventType === "PermissionRequest") { + // Agent needs permission - always set to permission (overrides working) + state.setPaneStatus(paneId, "permission"); + } else if (eventType === "Stop") { + // Agent completed - only mark as review if not currently active + const activeTabId = state.activeTabIds[workspaceId]; + const focusedPaneId = + activeTabId && state.focusedPaneIds[activeTabId]; + const isAlreadyActive = + activeWorkspaceRef.current?.id === workspaceId && + focusedPaneId === paneId; + + if (isAlreadyActive) { + // User is watching - go straight to idle + state.setPaneStatus(paneId, "idle"); + } else { + // User not watching - mark for review + state.setPaneStatus(paneId, "review"); + } } } else if (event.type === NOTIFICATION_EVENTS.FOCUS_TAB) { const appState = useAppStore.getState(); diff --git a/apps/desktop/src/shared/constants.ts b/apps/desktop/src/shared/constants.ts index 35c6207de41..4a9dca35899 100644 --- a/apps/desktop/src/shared/constants.ts +++ b/apps/desktop/src/shared/constants.ts @@ -40,7 +40,7 @@ export const CONFIG_TEMPLATE = `{ }`; export const NOTIFICATION_EVENTS = { - AGENT_COMPLETE: "agent-complete", + AGENT_LIFECYCLE: "agent-lifecycle", FOCUS_TAB: "focus-tab", } as const; diff --git a/apps/desktop/src/shared/tabs-types.ts b/apps/desktop/src/shared/tabs-types.ts index d38ce4c4284..f55cd73ceaa 100644 --- a/apps/desktop/src/shared/tabs-types.ts +++ b/apps/desktop/src/shared/tabs-types.ts @@ -10,6 +10,15 @@ import type { ChangeCategory } from "./changes-types"; */ export type PaneType = "terminal" | "webview" | "file-viewer"; +/** + * Pane status for agent lifecycle indicators + * - idle: No indicator shown (default) + * - working: Agent actively processing (amber) + * - permission: Agent blocked, needs user action (red) + * - review: Agent completed, ready for review (green) + */ +export type PaneStatus = "idle" | "working" | "permission" | "review"; + /** * File viewer display modes */ @@ -49,7 +58,7 @@ export interface Pane { type: PaneType; name: string; isNew?: boolean; - needsAttention?: boolean; + status?: PaneStatus; initialCommands?: string[]; initialCwd?: string; url?: string; // For webview panes