fix: exit once the action settles and time out the runtime version listing

[okisdev]

closes #69

a failed store restore left the step running until the job timeout. the bundled @actions/cache rejects the download on its first failed block without cancelling the blocks still in flight, and because the entry never exits, those requests keep node alive after main() settles.

• src/index.ts exits once main() settles. process.exit() reads process.exitCode, so a run setFailed marked still exits 1, and a clean run exits 0 even with requests left dangling, the way actions/cache exits after its restore.
• the pnpm list --global child behind getInstalledRuntimeVersions gets a 60 second timeout. that listing only refines outputs and the cache key, so a stuck child now falls back to the requested selector with a warning, like any other failure there, and the error names the signal that stopped it.

dist/index.js is rebuilt with pnpm run build, and pnpm test passes (55).

Summary by CodeRabbit

• Bug Fixes
  • Setup processes now flush pending output before exiting, including when setup fails.
  • Failed setup processes now exit cleanly instead of remaining stuck.
  • Runtime installation commands stop after 60 seconds if they do not complete.
  • Error messages for unsuccessful commands now include termination details when available.

[coderabbitai]

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ℹ️ Recent review info

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Configuration used: Organization UI

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Reviewing files that changed from the base of the PR and between 4363586 and 6ab309b.

⛔ Files ignored due to path filters (1)

• dist/index.js is excluded by !**/dist/**

📒 Files selected for processing (5)

• package.json
• src/flush-and-exit.test.mjs
• src/flush-and-exit.ts
• src/index.ts
• src/install-runtime/installed-versions.test.mjs

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⏰ Context from checks skipped due to timeout. (1)

• GitHub Check: Greptile Review

🔇 Additional comments (5)

src/flush-and-exit.ts (1)

1-17: LGTM!

src/index.ts (1)

4-4: LGTM!

Also applies to: 95-95, 101-101

src/flush-and-exit.test.mjs (1)

1-85: LGTM!

src/install-runtime/installed-versions.test.mjs (1)

1-75: LGTM!

package.json (1)

7-7: LGTM!

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📝 Walkthrough

Walkthrough

The action flushes stdout and stderr before exiting after main() settles. The pnpm output helper now has a 60-second timeout and includes terminating signals in errors for unsuccessful exits.

Changes

Action process lifecycle

Layer / File(s)	Summary
Flush streams before action exit src/flush-and-exit.ts, src/index.ts, src/flush-and-exit.test.mjs	flushAndExit() waits for stdout and stderr write callbacks before calling process.exit(). The main() promise chain calls it after fulfillment or rejection. Child-process tests cover queued output, preserved exit code 1, and exit despite an active interval.
pnpm subprocess timeout and errors src/install-runtime/index.ts, src/install-runtime/installed-versions.test.mjs, package.json	runPnpmForOutput applies a 60-second timeout and includes a terminating signal in errors for unsuccessful exits. Tests cover signal termination, exit code 3, and a successful runtime listing. The test script discovers src/*.test.mjs files.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Severity of issue fixed: Medium

Sequence Diagram(s)

sequenceDiagram
  participant MainPromise
  participant flushAndExit
  participant Stdout
  participant Stderr
  MainPromise->>flushAndExit: settle and invoke exit handling
  flushAndExit->>Stdout: write empty chunk
  flushAndExit->>Stderr: write empty chunk
  Stdout->>flushAndExit: report write completion
  Stderr->>flushAndExit: report write completion
  flushAndExit->>flushAndExit: call process.exit

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Suggested reviewers: zkochan

Merge Risk: ⚪ Minimal · up to 6ab30

No merge-blocking issue is established. The changes preserve action output and exit status while bounding runtime-version listing failures. Merge after normal checks pass.

Security Architecture Review

Security architecture risk: 🔵 Low · up to 6ab30

The change preserves failure status and cache publication safeguards without expanding installation authority. Remaining uncertainty concerns subprocesses that resist termination and whether the deployed bundle matches the reviewed source.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The demonstrated effect is scoped to the action process, its listing child, workflow-visible completion and output, and subsequent cache publication. The inspected changes do not demonstrate expanded tenant reach or additional credential authority.

Trust Boundaries and Controls

• observed — The rejection handler establishes failure status before termination. The exit helper does not overwrite that status, and cache saving separately requires a finalized primary key.

Resilience and Maintainability Implications

• inferred — The new timeout does not guarantee a hard completion bound. Settlement still depends on the child close event, with no explicit escalation or descendant cleanup. A child ignoring termination or a descendant retaining stdout could prevent main from settling and therefore prevent the exit helper from running. The previous implementation was also unbounded, so this is a residual limitation rather than an established PR regression.

Hardening Proposals

• proposed — If a strict completion deadline is required, define an independent deadline and termination-escalation policy, including descendant pipe ownership, and verify recovery when termination is ignored.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 5 files. (1 skipped: 1…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes both primary changes: exiting after the action settles and timing out runtime version listing.
Linked Issues check	✅ Passed	PR #70 meets the coding requirements in directly linked issue #69. src/index.ts calls flushAndExit() after main() settles, including rejected runs, and preserves the exit code set by setFailed…
Out of Scope Changes check	✅ Passed	The reported changes stay within issue #69. The flush-and-exit helper addresses dangling requests after action completion. The subprocess timeout and error details address the runtime-version listing …

Full details: Docstring Coverage

Explanation

Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 5 files. (1 skipped: 1 unsupported.)

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_{A rabbit watched the streams run dry,
Then saw the action wave goodbye.
The pnpm clock now counts to sixty,
Its signal errors tell us swiftly.
The tests catch output, code, and flow,
Then hop away through fields of snow.}

_{Comment @coderabbitai help to get the list of available commands.}

[qodo-code-review]

PR Summary by Qodo

Exit after the action settles and time out runtime version listing

🐞 Bug fix 🕐 10-20 Minutes

AI Description

• Exit when the action settles so failed cache downloads cannot keep the step running.
• Time out runtime version listing after 60 seconds and fall back to requested selectors.

Diagram

graph TD
  Start["Main action"] --> Cache["Cache restore"] --> Runtime["Runtime install"] --> List["Version listing"] -->|"result or fallback"| Output["Outputs and cache"] --> Exit(["Process exit"])
  Cache -->|"rejection"| Failure["Mark failure"] --> Exit

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High-Level Assessment

The following are alternative approaches to this PR:

1. Cancel outstanding cache downloads

• ➕ Cleans up in-flight requests rather than terminating the process around them.
• ➖ Requires a change to or replacement of bundled @actions/cache behavior and would not bound a stuck runtime-listing subprocess.

Recommendation: The PR's action-level exit is a pragmatic fix for requests the action cannot cancel, while the subprocess timeout separately bounds optional version discovery. Upstream cache cancellation would be cleaner but is not a practical substitute for this fix.

Files changed (3) +12 / -7

Bug fix (3) +12 / -7

index.jsRebuild the distributable with exit and timeout fixes +1/-1

Rebuild the distributable with exit and timeout fixes

• The bundled action now exits after its main promise settles. Its bundled pnpm version-listing subprocess also has a 60-second timeout and reports a terminating signal.

dist/index.js

index.tsExit when the action's main promise settles +8/-4

Exit when the action's main promise settles

• Adds a finalizer that exits after either the main or post action completes, including after its rejection handler calls setFailed. This prevents leftover cache download requests from keeping the step alive.

src/index.ts

index.tsBound and diagnose pnpm runtime version listing +3/-2

Bound and diagnose pnpm runtime version listing

• Adds a 60-second timeout to the pnpm subprocess used to read installed runtime versions. Its error now identifies a termination signal, allowing the existing warning and selector fallback to handle timeouts.

src/install-runtime/index.ts

[greptile-apps]

Confidence Score: 4/5

[Medium risk] Adds process exit handling and timeout to runtime version listing.

The PR should satisfy the repository’s comment requirement and add timeout-path coverage before merging.

_{Reviews (2) · Last reviewed commit: "fix: flush the action output before exit..."}

[greptile-apps]

Timeout path lacks coverage The runtime tests only exercise resolveRuntimeRequests, so they do not check whether this new timeout falls back or produces the expected warning. A regression in the hang-prevention path could pass the test suite unnoticed. Add a child-process test for the timeout and signal path.

[okisdev]

covered in 6ab309b by src/install-runtime/installed-versions.test.mjs, which drives getInstalledRuntimeVersions against a fake pnpm on binDest: one that signals itself, one that exits non-zero, and one that prints a listing. the first pins the signal in the warning and fails without this change, since the old message always read code null.

a timeout surfaces through that same path, because node's spawn timeout kills the child with killSignal and the close handler then reports the signal. testing the 60 second wait itself would mean either a 60 second test or a timeout seam that exists only for the test, so i left it at the observable it produces.

[coderabbitai]

Actionable comments posted: 1

---

• 🪄 Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @src/index.ts:
- Around line 95-100: Update the `main()` promise’s `.finally()` handler to wait
for pending stdout writes before forcing process exit, so the error annotation
emitted by `setFailed(error)` reaches the GitHub Actions runner. Preserve the
existing exit behavior after the stdout flush completes.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: d1ce5ed4-9cdc-42b5-8467-6f8b6fc5e1f2

📥 Commits

Reviewing files that changed from the base of the PR and between fbda4c8 and 4363586.

⛔ Files ignored due to path filters (1)

• dist/index.js is excluded by !**/dist/**

📒 Files selected for processing (2)

• src/index.ts
• src/install-runtime/index.ts

Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 1 remain after this review.

📜 Review details

⏰ Context from checks skipped due to timeout. (1)

• GitHub Check: Greptile Review

🔇 Additional comments (2)

src/install-runtime/index.ts (1)

216-216: LGTM!

Also applies to: 224-224, 228-228

src/index.ts (1)

93-100: LGTM!

[greptile-apps]

Comment narrates exit behavior The opening sentence restates what flushAndExit does, which its name and implementation already make clear. The repository requires comments not to narrate code; please satisfy that requirement before merging.

Context Used: Comments and docs in code are suspicious. Is test coverage not sufficient the reason why a comment was added? Comments should not replace tests. Comments should also not narrate code. Is the code hard to understand? Then it should be refactored to ma... (source)

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