ci(ios): batch scheduled TestFlight uploads by commit count and age - #13706
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📝 WalkthroughWalkthroughThe workflows now batch scheduled iOS uploads by commit count and age. They use shallow checkouts, bounded TestFlight history fetching, and prebuilt GhosttyKit downloads with source-build fallbacks. New tests validate the batching, checkout, history, and workflow wiring. ChangesScheduled Upload Batching
Lean iOS Upload Checkout
Priority: ➖ Normal Estimated code review effort: 4 (Complex) | ~60 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant ScheduledWorkflow
participant BatchDecision
participant GitHistory
participant UploadJob
ScheduledWorkflow->>BatchDecision: Run with thresholds and prior upload SHA
BatchDecision->>GitHistory: Read first-parent relevant commits
GitHistory-->>BatchDecision: Return commit times and changed paths
BatchDecision-->>ScheduledWorkflow: Write upload or skip decision
ScheduledWorkflow->>UploadJob: Start upload when decision is true
sequenceDiagram
participant TestFlightUpload
participant NotesHistoryFetcher
participant GitRemote
participant GhosttyKitProvisioning
TestFlightUpload->>NotesHistoryFetcher: Fetch the previous upload range
NotesHistoryFetcher->>GitRemote: Deepen shallow checkout within bounds
GitRemote-->>NotesHistoryFetcher: Return reachable history
TestFlightUpload->>GhosttyKitProvisioning: Download prebuilt GhosttyKit
GhosttyKitProvisioning-->>TestFlightUpload: Report available or use source fallback
Merge Risk: 🟡 Moderate · up to Setting a batching threshold to 0 does not disable it as documented. It either falls back to the default or triggers an upload on every scheduled poll. Separately, unusual file names can hide relevant iOS commits, and some histories can repeat earlier changes in TestFlight notes. Align the zero-threshold behavior with the documented contract before merging. Important Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional. ❌ Failed checks (1 error, 1 warning)
✅ Passed checks (23 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 15.07% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 73 functions across 5 files. (4 skipped: 4 unsupported.) Full details: Cmux Algorithmic ComplexityExplanation The new production shell script rescans the growing Git history on every deepening round. In Resolution Use one incremental traversal or cached boundary/count metadata across deepening rounds. Do not rerun full ✨ Finishing Touches🧪 Generate unit tests (beta)
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Triage note — confirming the stack, and flagging one review risk. You state this is stacked on #13703, but the pull request's base is Sequencing: #13703 first. No conflict between them, and reviewing this one first means reading #13703's diff twice. The risk worth a test. #13703 introduces The simulation table (INTERNAL 13→4, official 16→8 on a 122-merge day) is the strongest scheduling evidence in the CI backlog, and it is measured against real first-parent history rather than modelled. Please keep that table in the description if this gets rebased. |
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@scripts/ci/ios_upload_batch_decision.py`:
- Around line 137-140: Update the Git history parsing around the log invocation
and touches() so output uses NUL-delimited records via git log -z, then parse
commit metadata and pathname fields explicitly without relying on Git quoting.
Preserve exact special-character paths for prefix classification, and add a
regression test covering a pathname containing a control character such as a
newline.
- Around line 80-81: Update scripts/ci/ios_upload_batch_decision.py lines 80-81
so parse accepts zero for min_commits, and update the decision logic at lines
101-104 to evaluate count and age conditions only when their thresholds are
greater than zero. In tests/test_ios_upload_batching.py lines 90-104, replace
the invalid-zero expectation with independent and combined coverage for disabled
thresholds.
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.github/workflows/ci-guards.yml.github/workflows/ios-appstore-upload.yml.github/workflows/ios-testflight.ymlios/scripts/fetch-testflight-notes-history.shscripts/ci/ios_upload_batch_decision.pyscripts/ci/workflow_guard_groups.pytests/test-execution.tomltests/test_ios_upload_batching.pytests/test_ios_upload_lean_checkout.py
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…oads The two macOS upload jobs (ios-testflight.yml, ios-appstore-upload.yml) cloned with fetch-depth 0 + recursive submodules (~12 min) and installed zig unconditionally (~6 min) before any build. - Checkout is fetch-depth 1 with no submodules and no tags. The iOS archive links only GhosttyKit.xcframework; bonsplit and homebrew-cmux are macOS/release-only, and the ghostty source is needed only for the from-source fallback. - The pinned prebuilt GhosttyKit is downloaded first, keyed by the ghostty gitlink (git rev-parse HEAD:ghostty). Only if that fails does the job fetch ghostty at depth 1, install zig, and run ensure-ghosttykit.sh from source (the reload-build.yml pattern). - The CMUX INTERNAL notes range (last_uploaded_sha..HEAD) is fetched by ios/scripts/fetch-testflight-notes-history.sh: base at depth 1, then --shallow-since one day before it, then bounded deepening. All fetches are blobless (--filter=blob:none), which the path-limited notes log does not need and which makes deepening ~10x cheaper. The official lane reads no history (changelog notes, timestamp build numbers). - main has merge commits, so the ancestor check alone is not enough: a merged side branch can hold commits older than the --shallow-since cutoff. The script keeps deepening while <base>..HEAD still has a shallow boundary in it, or a range commit is no newer than a boundary of the base's own history, and repairs .git/shallow after every fetch (a --shallow-since fetch can record a boundary it never sent, and the base can stay marked shallow after its parents arrive). On the real case head 11396c3 / base 3337293 the notes went 4 lines -> 21, identical to a full clone, in ~20 s and 320/320 range commits. - A force-pushed-away base now stops as soon as <base>..HEAD has no shallow boundary left (or every boundary is more than a week older than the cutoff) instead of running the deepen budget out, and the step carries timeout-minutes: 5 plus continue-on-error: true. Every script path still exits 0. - tests/test_ios_upload_lean_checkout.py pins the policy and exercises the fetch script against real shallow clones, including a merge whose side branch predates the cutoff and a force-pushed base; wired into ci-guards (release-ios) and tests/test-execution.toml. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
On a busy day nearly every poll finds an iOS-relevant merge, so CMUX INTERNAL uploaded about every 20 minutes and official cmux.app every hour, each a cold Release archive on the macOS pool PR CI shares. A scheduled poll that the existing rules would upload now also needs (pending relevant commits >= N) OR (oldest pending relevant commit >= T minutes old), with at least one pending. Manual dispatch always uploads; the twice-daily DEMO lane is not batched. Every existing skip rule is unchanged. - INTERNAL: IOS_TESTFLIGHT_INTERNAL_MIN_COMMITS (default 5) and IOS_TESTFLIGHT_INTERNAL_MAX_AGE_MINUTES (default 180); relevant means the workflow's own iosRelevantPaths array, read from the workflow. - Official: IOS_APPSTORE_MIN_COMMITS (default 10) and IOS_APPSTORE_MAX_AGE_MINUTES (default 360); this lane has no path filter, so every main commit counts. Its "unchanged" check now also requires the last completed upload (the upload marker artifact) to be HEAD, because a batch-skipped poll also concludes successfully. - scripts/ci/ios_upload_batch_decision.py holds the rule. It counts main's first-parent commits (one per merged PR) from a blobless sparse checkout deepened by fetch-testflight-notes-history.sh, so no extra REST calls for INTERNAL and one for official. History it cannot read fails open to an upload. The reason goes to the step summary. - tests/test_ios_upload_batching.py covers the rule, the git reader on a real repository with a merge, and the wiring; registered in ci-guards (release-ios) and the guard ownership manifest. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
A persistent failure in the checkout or batch step (missing script, runner without python3, renamed path) failed the whole decide job and stopped scheduled uploads. The steps now continue on error, so their output stays empty and the job keeps decide's upload answer. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Both batch steps shell out to ios/scripts/fetch-testflight-notes-history.sh, which deepens history in a loop. The upload job already wraps that same script in timeout-minutes: 5; the batch steps had no bound, so a pathological deepen would hold a Linux runner for the decide job's 360-minute budget. Both steps are continue-on-error, so a timeout falls back to the decide job's answer and uploads proceed -- the same fail-open path every other error in these steps already takes. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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# Conflicts: # .github/workflows/ci-guards.yml # tests/test-execution.toml
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Also reproduced the incomplete first-parent-history concern: a shallow boundary can leave the upload base reachable through the second parent while truncating main's history. Test-only commit 4e0217b fails against the prior implementation; 16e1817 requires the first-parent walk to reach the upload base and falls back to uploading otherwise. All 25 batching tests pass. — BasaltUnwind g1 🗝️ |
1 participant
Adds configurable batching to scheduled iOS uploads. The checkout prerequisite #13703 has merged; this PR is based on current main.
Problem
Both iOS upload workflows poll main: CMUX INTERNAL every 20 minutes, official cmux.app every hour. Their decide jobs skip only when main is unchanged, when no iOS path changed (INTERNAL), or, since #13660, when the last attempt failed and no iOS path changed since then. On a busy day (~100 merges) nearly every poll finds something, so INTERNAL uploads about every 20 minutes and official about every hour. Each upload is a cold Release archive on a Blacksmith macOS runner, and PR CI uses the same pool, where queues already run 30–60 minutes.
Rule
A scheduled poll that the existing rules would already upload now also has to pass a batching check. It uploads when
workflow_dispatchalways uploads, as today.skipped: 2/5 iOS commits, oldest 45/180 minorupload: 1/5 iOS commits, oldest 181/180 min (age reached)."Commits" means main's first-parent commits, one per merged PR, each diffed against its first parent. A commit's age is its committer date, which is when the PR landed on main.
Defaults and tuning
IOS_TESTFLIGHT_INTERNAL_MIN_COMMITS= 5IOS_TESTFLIGHT_INTERNAL_MAX_AGE_MINUTES= 180IOS_APPSTORE_MIN_COMMITS= 10IOS_APPSTORE_MAX_AGE_MINUTES= 360Set them under Settings → Secrets and variables → Actions → Variables. If a variable is unset or empty, the in-workflow default applies. An invalid value logs a warning and falls back to the default, so a typo can't stop uploads. Zero disables only that threshold:
MIN_COMMITS=0uses age alone, andMAX_AGE_MINUTES=0uses count alone. Set both to zero to disable batching and upload any pending change.MIN_COMMITS=1also uploads any pending relevant commit.What counts as relevant
iosRelevantPathsarray. The script reads that array fromios-testflight.ymlitself, so the list still lives in one place, with the same prefix/exact matching.How it works
scripts/ci/ios_upload_batch_decision.pyholds the rule (puredecide()plus the git reader).ios/scripts/fetch-testflight-notes-history.sh <last upload>(from ci(ios): shallow checkout and zig only on fallback for TestFlight uploads #13703), which deepens to the base, followed by the script.steps.batch.outputs.X || steps.decide.outputs.X, so every other path keeps the decide script's answer.actions/artifacts?name=cmux-app-testflight-upload, which gives the SHA of the last completed upload.Expected upload counts
Simulated on real main first-parent history, 2026-09-08 → 09-22, with polls at the real cron offsets. The old column models only the "any relevant change" rule.
Every relevant change still ships: at the latest one poll after T (≤ 3 h 20 min for INTERNAL, ≤ 7 h for official), and sooner once N pile up.
Tests
tests/test_ios_upload_batching.py, 20 tests.--no-ffmerge: first-parent counting and merge diffs.ci-guards.yml(release-ios) and inPATH_OWNERSinscripts/ci/workflow_guard_groups.py.tests/test_ios_*.pytests/test_ci_linux_guard_routing.py,tests/test_ci_release_guard_structure.py,tests/test_ci_guard_workflow_structure.pyactionlint -config-file .github/actionlint.yaml🤖 Generated with Claude Code
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Batches the scheduled iOS TestFlight uploads (CMUX INTERNAL every 20 min, cmux.app hourly) by pending commit count and age, and shrinks their macOS checkout to free up the shared runner pool.
Batching rule
Lean macOS checkout
Written for commit 16e1817. Summary will update on new commits.
Summary by CodeRabbit
New Features
Bug Fixes
Performance