fix/tmux resurrect nixos

[shunkakinoki]

• fix: tmux resurrect/continuum restore on NixOS
• fix: load resurrect before continuum in plugin order

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Summary by cubic

Fixes reliable tmux session restore on NixOS by loading resurrect before continuum and resolving the restore script after the server starts. Moves plugin options into per-plugin extraConfig so hooks run with the correct settings and lets continuum manage status-right.

• Bug Fixes

  • Start a tmux server in _two_function.fish so plugins load, then read @resurrect-restore-script-path (fallback to key scan) and run restore.
  • Load resurrect before continuum to enable auto-restore.
  • Use grep -P in the post-save hook to correctly match tab-separated fields.

• Refactors

  • Move plugin options from tmux.conf to per-plugin extraConfig in default.nix (resurrect, continuum, extrakto, tmux-thumbs, tmux-sessionx).
  • Set status-right and its length in continuum extraConfig so it can prepend its save trigger; remove duplicates from tmux.conf.

^{Written for commit fcec1ba. Summary will update on new commits.}

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[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 284f2e36-89a9-453d-97c9-8569c0b87fd1

📥 Commits

Reviewing files that changed from the base of the PR and between c93a1b7 and fcec1ba.

📒 Files selected for processing (3)

• home-manager/programs/fish/functions/_two_function.fish
• home-manager/programs/tmux/default.nix
• home-manager/programs/tmux/tmux.conf

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📝 Walkthrough

Summary by CodeRabbit

• New Features

  • Enhanced tmux plugin configuration with customized keybindings: Extrakto (Tab), Thumbs (Space), and Sessionx (o).
  • Improved session restoration with selective process resurrection and automatic state persistence.

• Bug Fixes

  • Optimized session resurrection detection and fallback resolution logic.

• Configuration

  • Adjusted tmux status bar sizing and layout for better display consistency.

Walkthrough

Configuration refactoring moves tmux plugin options from static .conf file to Nix module extraConfig declarations, while reordering fish function logic to detect the resurrect restore script after bootstrapping a temporary tmux server instead of before.

Changes

Cohort / File(s)	Summary
Fish function logic home-manager/programs/fish/functions/_two_function.fish	Reordered restore-script resolution to occur after _bootstrap tmux server startup. Changed detection strategy to query tmux show-options first, then fall back to tmux list-keys lookup if empty. Removed delay comment.
Tmux plugin configuration migration home-manager/programs/tmux/default.nix, home-manager/programs/tmux/tmux.conf	Moved tmux plugin options from static .conf to Nix extraConfig declarations. Added per-plugin configuration for extrakto, resurrect (with pane content capture, process allowlist, post-save hook), continuum (restore enabled, 3-second save interval), tmux-sessionx, and tmux-thumbs. Removed explicit status bar sizing and status-right format from .conf.

Sequence Diagram

sequenceDiagram
    participant Fish as Fish Function
    participant Bootstrap as _bootstrap<br/>tmux server
    participant ShowOpts as tmux show-options
    participant ListKeys as tmux list-keys
    participant Resurrect as Resurrect<br/>Restore Script

    rect rgba(200, 150, 255, 0.5)
    Note over Fish,Resurrect: Old Flow (eager detection)
    Fish->>ListKeys: Query `@resurrect-restore-script-path`
    activate ListKeys
    ListKeys-->>Fish: path or fallback
    deactivate ListKeys
    Fish->>Resurrect: Execute restore
    end

    rect rgba(150, 200, 255, 0.5)
    Note over Fish,Resurrect: New Flow (deferred detection)
    Fish->>Bootstrap: Start _bootstrap tmux server<br/>(if no sessions exist)
    activate Bootstrap
    Bootstrap-->>Fish: Server ready
    deactivate Bootstrap
    Fish->>ShowOpts: Query `@resurrect-restore-script-path`
    activate ShowOpts
    ShowOpts-->>Fish: path or empty
    deactivate ShowOpts
    alt Option set
        Fish->>Resurrect: Execute restore
    else Option empty
        Fish->>ListKeys: Fall back to list-keys lookup
        activate ListKeys
        ListKeys-->>Fish: path
        deactivate ListKeys
        Fish->>Resurrect: Execute restore
    end
    end

Loading

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• feat(tmux): auto-save on detach/close and fix restore timing #1287: Modifies the same _two_function.fish to address resurrect restore timing by deferring script detection until after tmux server bootstrap.
• fix: tmux Wayland clipboard and serena mutable config #786: Modifies tmux configuration including status bar formatting and option declarations that this PR relocates to Nix module.
• feat(tmux): fix resurrect and add 3rd tab to tmuxinator configs #1285: Updates tmux Resurrect/Continuum configuration with post-save hooks and process restrictions similar to those now in default.nix extraConfig.

Poem

🐰 Hop-hop, configurations now align,
Fish and tmux dance in perfect time,
Bootstrap first, then restore with care,
Options migrate through the Nix-y air! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/tmux-resurrect-nixos

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[mesa-dot-dev]

Mesa Description

TL;DR

Fixes tmux resurrect/continuum restore on NixOS.

What changed?

• fix: tmux resurrect/continuum restore on NixOS
• fix: load resurrect before continuum in plugin order

^{Description generated by Mesa. Update settings}

[gemini-code-assist]

Code Review

This pull request refactors the tmux configuration by migrating plugin-specific settings from tmux.conf to default.nix using Home Manager's plugin attribute sets. It also updates the _two_function.fish script to more reliably locate the tmux-resurrect restore script by checking tmux options before falling back to key bindings. Feedback was provided to harden the resurrect-hook-post-save-all hook by using absolute Nix store paths for system utilities like grep and readlink, ensuring the hook remains robust across different environments.

[gemini-code-assist]

The resurrect-hook-post-save-all hook is somewhat fragile as it relies on the user's PATH for commands like grep, readlink, and mv. In a Nix environment, it's more robust to use absolute paths from pkgs. Additionally, using $HOME instead of ~ and adding a check for the existence of the last symlink improves reliability.

          set -g @resurrect-hook-post-save-all 'd=$HOME/.tmux/resurrect; [ -L "$d/last" ] && f="$d/$(${pkgs.coreutils}/bin/readlink "$d/last")" && ${pkgs.gnugrep}/bin/grep -P "^(pane|window)\twork\t" "$f" > "$f.tmp" && ${pkgs.coreutils}/bin/printf "state\twork\n" >> "$f.tmp" && ${pkgs.coreutils}/bin/mv "$f.tmp" "$f"'