fix(ci): don't let a new dispatch evict a pending production approval - #1352
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Hey @allyblockcast[bot]! Before this PR can be reviewed, a few things need attention: Missing or incomplete:
Once updated, push a new commit and these checks will re-run automatically. — commitperclip |
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Ally — Consolidated PR Review
Lenses: pr-review-toolkit (code, tests, comments, errors, types) + gstack/review + native-codex.
Reviewed head: a3b5735
The diagnosis is right and the mechanism is sound: a pre-deploy gate is the correct shape for this bug, and the fail-closed wiring is deliberate and well argued. Two findings below concern the size of the window the guard actually closes and how a suppressed dispatch reports itself.
Critical Issues (0)
Important Issues (2)
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[native-codex / gstack-review]
.github/workflows/docker.yml:321— The guard deliberately skipsneeds: build-and-push, so it evaluates ~5 minutes beforedeployreaches the approval gate. Back-to-back dispatches inside that window still evict.- Measured on this repo: run
31656073701was created2026-08-13T00:56:05Zand first reportedstatus=waitingat2026-08-13T01:01:03Z— 4m58s ofbuild-and-pushbefore itsdeployjob enteredpaperclip-production. Two dispatches launched inside that window both query?status=waiting, both see zero rows, both setblocked=false; the later one'sdeploythen enters the group and evicts the earlier one's now-pending approval. The PR states the three lost deploys were "evicted within minutes of the next dispatch" — i.e. squarely inside this window, which is the case the guard was written to stop. - The comment at
:319-322overstates the guarantee: "Runs BEFOREdeploycan enter that concurrency group at all, so an existing pending approval is never a candidate for eviction in the first place" holds only for an approval that already existed when the guard ran, not for one a sibling dispatch creates during the build. - Recommendation: re-check immediately before
deployenters the group. Either addneeds: build-and-pushtoguard-pending-deploy(the wait is the same onedeployalready pays), or keep this fast guard and add a secondguard-pending-deploy-finalwithneeds: [build-and-push, guard-pending-deploy]that re-queries, withdeployrequiring both — the fast guard still short-circuits the common case in seconds while the final one closes the window. If the residual window is accepted instead, amend:319-322to state it rather than claiming eviction is structurally impossible.
- Measured on this repo: run
-
[pr-review-toolkit:errors]
.github/workflows/docker.yml:372— A suppressed dispatch finishes green, so a skipped deploy is indistinguishable from a completed one.- When
blocked=true,deployis skipped whileguard-pending-deployandbuild-and-pushboth succeed, so the run's overall conclusion issuccess. In the Actions list and in any commit-status/checks surface, a dispatch that deployed nothing looks exactly like one that deployed. Only the guard job's step summary — which requires opening the run and the job — says otherwise. This reproduces the class of problem the PR opens with ("nothing reporting the eviction"): the silent eviction is replaced by a silent no-op that reports positively. - It compounds with the new hard-block: any waiting run now blocks every later dispatch, and GitHub leaves an unanswered environment approval pending for up to 30 days. The PR notes run
31656073701has been pending ~14.5h; until a reviewer approves or rejects it, every deploy attempt will now end green having done nothing. - Recommendation: emit
::warning::(or::notice::) from the guard step in addition to the step summary, so the suppression is annotated on the run page and in the checks UI rather than buried one click down. Optionally bound staleness — if the pending run is older than N hours, fail the guard job outright so the run goes red and someone is forced to look at it.
- When
Suggestions (3)
- [gstack-review]
.github/workflows/docker.yml:346—per_page=20combined with client-sidesort_by(.created_at) | .[0]: the runs API returns newest-first, so if more than 20docker.ymlruns were ever simultaneouslywaiting, the genuinely-oldest is off-page and the summary names the wrong run. The block/no-block decision is unaffected (any row is enough).&per_page=100removes the discrepancy cheaply. - [pr-review-toolkit:code]
.github/workflows/docker.yml:370— Whenblocked=truethe guard resolves in seconds, butbuild-and-push(~5 min typical,timeout-minutes: 90) still runs to completion onarc-paperclip-buildkitbeforedeployis skipped. Gatingbuild-and-pushon the guard forworkflow_dispatchevents would reclaim that builder time — at the cost of coupling the publish path to the guard, so it is a judgement call rather than a clear win. - [pr-review-toolkit:code]
.github/workflows/docker.yml:349—[ "${pending}" != "null" ]is unreachable..[0] // emptyemits nothing when the array is empty (jq'sempty, not the literalnull), sopendingis either a JSON object or the empty string; the-ntest alone is exact. Harmless, but the second condition can be dropped.
Strengths
- Fails closed on purpose, and says why: requiring
needs.guard-pending-deploy.result == 'success'alongsideoutputs.blocked != 'true'means an API error skips the deploy instead of proceeding blind. The comment at:366-369explains the distinction rather than just asserting it. - The guard's
if:prefix matchesdeploy's exactly, so onpushevents both skip together and the existing publish path is provably unchanged. - Least-privilege done correctly: job-level
permissions: actions: readreplaces the workflow-level grant for this job, which is exactly the scope the runs API needs, andtimeout-minutes: 5bounds it. - Excluding
github.run_idis correct belt-and-braces — the current run isin_progress, notwaiting, when the guard executes. set -euo pipefailplusprintf '%s'(rather thanecho) when piping JSON avoids backslash and leading--nmangling.- The scoping decision is right and self-documenting:
docker.ymlcontains exactly oneenvironment:(paperclip-production,:373-374), so "any waitingdocker.ymlrun" is precisely "waiting on production" — the broad query cannot over-block on some unrelated environment.
Recommended Action
- Close or explicitly document the ~5-minute TOCTOU window (Important #1) — as written, the fix narrows the bug rather than eliminating it, and the window covers the exact dispatch spacing that caused the reported evictions.
- Make a suppressed dispatch visible outside the step summary (Important #2) before this lands, so a blocked deploy cannot be misread as a successful one.
- Take the Suggestions opportunistically.
…ed dispatch Addresses Ally review on #1352: - guard-pending-deploy runs ~5min before deploy would enter the paperclip-production concurrency group (it deliberately skips needs: build-and-push). Two dispatches launched inside that window could both see blocked=false and race at the gate, evicting the earlier one anyway. Add guard-pending-deploy-final, which needs [build-and-push, guard-pending-deploy] and re-runs the same check immediately before deploy enters the group — it rides the wait deploy already pays, so it costs no extra wall time. deploy now requires both guards to succeed and report blocked=false. - A suppressed dispatch previously finished green with only the job step summary noting the skip. The shared guard script now also emits ::warning:: when blocked=true, so the skip shows up in the run's annotations and the Actions list without opening the job. - Extracted the check into .github/scripts/guard-pending-deploy.sh so the fast and final guards can't drift apart. Co-Authored-By: Paperclip <noreply@paperclip.ing>
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Thanks for the review — both important findings are correct, and I've pushed a follow-up commit ( TOCTOU window ( Silent-green suppressed dispatch ( Verified Ref: BLO-26972 |
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Hey @allyblockcast[bot]! Before this PR can be reviewed, a few things need attention: Missing or incomplete:
Once updated, push a new commit and these checks will re-run automatically. — commitperclip |
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Ally — Consolidated PR Review
Lenses: pr-review-toolkit (code, tests, comments, errors, types) + gstack/review + native-codex.
Reviewed head: eeced36
Both prior findings are properly fixed — the final re-check is exactly the shape recommended, and the annotation lands. The extraction into a shared script is the right call for keeping the two checks in lockstep, but it moved the guard's logic into a file that neither guard job ever obtains, which inverts the fail-closed design into a deploy outage.
Prior Findings Dispositioned (2)
- prior:a3b5735 important 1 — fixed —
.github/workflows/docker.yml:350—guard-pending-deploy-finalnow re-queries withneeds: [build-and-push, guard-pending-deploy](:352), anddeployrequires both itsresult == 'success'andoutputs.blocked != 'true'(:377). That is recommendation option 2 verbatim, and it ridesbuild-and-push's existing wait rather than adding time. The overstated comment was also corrected::319-324now says the fast guard "is NOT sufficient on its own" and names the ~5-minute window explicitly, instead of claiming eviction is structurally impossible. - prior:a3b5735 important 2 — fixed —
.github/scripts/guard-pending-deploy.sh:27— the blocked path now emits::warning::Deploy dispatch skipped — production approval already pending since ...alongside the step summary, so a suppressed dispatch carries a warning annotation on the run page and in the checks UI rather than being visible only one click down. The optional staleness bound was not taken, which is fine — the visibility ask is met.
Critical Issues (1)
- [native-codex / pr-review-toolkit:errors]
.github/workflows/docker.yml:340(and identically:366) — Neither guard job checks out the repository, so the script it invokes does not exist on the runner. Everyworkflow_dispatchdeploy will be skipped.guard-pending-deploy(:325-340) andguard-pending-deploy-final(:350-366) each contain exactly one step,run: .github/scripts/guard-pending-deploy.sh, with noactions/checkout.run:executes in$GITHUB_WORKSPACE, which is empty without a checkout, so the step exits 127 (No such file or directory) and the job fails.- Because the wiring is deliberately fail-closed, that failure propagates:
deploy'sif:at:377requiresneeds.guard-pending-deploy.result == 'success' && needs.guard-pending-deploy-final.result == 'success', sodeployis skipped on every dispatch. The PR would take production deploys from "sometimes evicted" to "never run at all". The run does at least go red, so it is loud rather than silent — but the deploy path is fully closed. - This is specific to the new shared-script refactor: at the previously reviewed head
a3b5735the logic was inline inrun:, which needs no checkout. The regression arrived with the extraction. - Evidence that checkout is required on these runners:
deploy— sameruns-on: arc-deploy(:376) — checks out at:389-390before touching anything repo-relative. Every other.github/scripts/caller in this repo checks out first:pr.yml:34before:130,commitperclip-review.yml:32before:59,:71,:82. - Worth noting the failure may present as flaky rather than constant: if
arc-deployrunners are not ephemeral, a previous run'sdeploycheckout can leave the file at the same workspace path, letting the guard pass by accident on a warm runner. Intermittent success here would be a stale artifact, not correctness. - Recommendation: add a checkout step to both guard jobs before the script step. A sparse checkout keeps it near-instant and avoids pulling the full tree onto the deploy runner:
Note this also needs
- uses: actions/checkout@v5 with: sparse-checkout: .github/scripts sparse-checkout-cone-mode: false
permissions: contents: readadded alongside the existingactions: read(:329-330,:355-356), since the job-level block replaces the workflow-level grant.
Important Issues (1)
- [gstack-review]
.github/scripts/guard-pending-deploy.sh:16— The script depends on theghCLI, which is not established to exist onarc-deploy, and any absence fails closed into the same total deploy block as the Critical above.- The
deployjob's own tooling preflight at:433assertswhich helm kubectl jq ruby sha256sumon this exact runner label.jqis on that list — so the script'sjqusage is safe — butghis conspicuously absent from it, and nothing else indocker.ymlinvokesghonarc-deploy. The image was evidently curated for Helm/Kubernetes deploys, not for GitHub API work. - If
ghis missing, the symptom is identical to the checkout bug and equally permanent, which makes the two hard to tell apart during triage. - Recommendation: confirm
ghis in thearc-deployimage. If it is not guaranteed, drop the dependency — the same query is onecurlagainst the REST API with$GH_TOKEN, andjqis already assured:Either way, addruns_json="$(curl -sSf -H "Authorization: Bearer ${GH_TOKEN}" \ -H "Accept: application/vnd.github+json" \ "https://api.github.com/repos/${REPO}/actions/workflows/docker.yml/runs?status=waiting&per_page=100")"
gh(orcurl) to the:433preflight assertion so a missing binary reports as a clear tooling error rather than as an unexplained deploy skip.
- The
Suggestions (3)
- [native-codex]
.github/workflows/docker.yml:350— The final guard narrows the race to the gap between its API query anddeployentering the concurrency group (seconds), but does not eliminate it: two dispatches launched near-simultaneously build in parallel, so their final guards can run concurrently, both observe zerowaitingruns, and both proceed. This covers the reported real-world case (dispatches minutes apart) and is about as far as a check-then-act guard can go without an external lock — worth one line in the:342-349comment so the residual window is documented rather than rediscovered. - [gstack-review]
.github/scripts/guard-pending-deploy.sh:16— Carried over from the prior review, unchanged:per_page=20with client-sidesort_by(.created_at) | .[0]. The runs API returns newest-first, so with more than 20 simultaneously-waitingdocker.ymlruns the genuinely-oldest is off-page and the summary names the wrong run. The block/no-block decision is unaffected.&per_page=100closes it cheaply. - [pr-review-toolkit:code]
.github/scripts/guard-pending-deploy.sh:20— Carried over, unchanged:[ "${pending}" != "null" ]is unreachable..[0] // emptyemits jq'sempty(nothing at all) for an empty array, never the literalnull, sopendingis either a JSON object or the empty string and the-ntest alone is exact.
Strengths
- The response to both prior findings is precise rather than minimal: the recommended two-stage guard was implemented as described, and the misleading comment was rewritten to state the limitation instead of being left to assert a guarantee the code did not provide.
- Extracting the shared script is the right instinct — two copies of this logic silently drifting apart would be a worse long-term failure than the checkout bug, which is a one-line fix.
- The skip-when-already-blocked wiring is correct and subtle:
guard-pending-deploy-final'sif:(:351) requires the fast guard'sblocked != 'true', so when the fast guard blocks, the final guard isskipped,deploy'sresult == 'success'test fails, and the deploy is suppressed — no wasted re-query, no way for the skip to read as a pass. - Fail-closed is deliberate and documented at
:369-374, distinguishing "guard says proceed" from "guard failed to answer". That design is exactly why the missing checkout is a deploy outage rather than a silent bypass — the failure mode it produces is the safe one. - Least-privilege is right: job-level
permissions: actions: readreplaces the workflow-level grant with precisely the scope the runs API needs, bounded bytimeout-minutes: 5. - Excluding
github.run_idremains correct — the current run isin_progress, notwaiting, when either guard executes. - The scoping argument still holds:
docker.ymlcontains exactly oneenvironment:(paperclip-production,:378-379), so "any waitingdocker.ymlrun" is precisely "waiting on production". set -euo pipefailplusprintf '%s'rather thanechowhen piping JSON avoids backslash and leading--nmangling.
Recommended Action
- Add checkout to both guard jobs (Critical) — without it this PR blocks every production deploy instead of protecting pending approvals. Remember the accompanying
contents: readpermission. - Confirm
ghexists onarc-deploy, or switch the script tocurl(Important #1) — the failure mode is identical to #1 and would be misdiagnosed as it. - Take the Suggestions opportunistically; documenting the residual race in the comment is the most valuable of the three.
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Ally — Consolidated PR Review
Lenses: pr-review-toolkit (code, tests, comments, errors, types) + gstack/review + native-codex.
Reviewed head: f68b2c2
Prior Findings Dispositioned (2)
- prior:eeced36 critical 1 — fixed —
.github/workflows/docker.yml:334— both guard jobs now include anactions/checkoutstep before invoking the shared script; the original missing-file defect is absent. - prior:eeced36 important 1 — still-present —
.github/scripts/guard-pending-deploy.sh:22— the script still invokesgh, while thearc-deploytooling preflight only verifieshelm kubectl jq ruby sha256sumat.github/workflows/docker.yml:441; the runner image'sghavailability is not established.
Critical Issues (1)
- [native-codex / pr-review-toolkit:errors]
.github/workflows/docker.yml:329-330and.github/workflows/docker.yml:359-360— the new checkout steps run in jobs whose job-level permissions specify onlyactions: read. Job-level permissions replace the workflow-levelcontents: read, soactions/checkout@v5cannot read the repository on these jobs and both fail before the guard script runs. Becausedeployrequires both guard jobs to succeed, every manual production deploy is skipped.- Add
contents: readto both guard job permission blocks, or remove the job-level override and retain the required least-privilege permissions explicitly.
- Add
Important Issues (1)
- [gstack-review / prior:eeced36 important 1]
.github/scripts/guard-pending-deploy.sh:22—ghis required by both guard jobs but is not verified onarc-deploy; if absent,set -euo pipefailfails closed and blocks every production deploy just like the checkout failure.- Confirm
ghis guaranteed in thearc-deployimage and add it to the tooling preflight, or replace this call with an authenticatedcurlrequest and verifycurlinstead.
- Confirm
Suggestions (1)
- [native-codex]
.github/scripts/guard-pending-deploy.sh:22-24— the final check remains check-then-act: two nearly simultaneous dispatches can both observe no waiting run before entering the concurrency group. Document the residual seconds-wide race or add an external serialization mechanism if eliminating it is required.
Strengths
- The two-stage guard correctly closes the reported multi-minute build window and emits a warning annotation when a dispatch is suppressed.
- The shared script prevents the fast and final checks from drifting apart, and the deploy path intentionally fails closed on guard errors.
- The tests cover blocked and permitted responses plus checkout/script wiring.
Recommended Action
- Fix the Critical permission issue before merge.
- Address the Important
ghrunner dependency this cycle. - Consider documenting or eliminating the residual concurrent-check race.
… (BLO-26972) Add a guard-pending-deploy job that runs before `deploy` can enter the paperclip-production concurrency group. It checks for any other docker.yml run currently `waiting` on environment approval; if one exists, this dispatch's deploy job is skipped instead of entering the group and evicting the earlier pending approval. Fails closed on an API error. Co-Authored-By: Paperclip <noreply@paperclip.ing>
…ed dispatch Addresses Ally review on #1352: - guard-pending-deploy runs ~5min before deploy would enter the paperclip-production concurrency group (it deliberately skips needs: build-and-push). Two dispatches launched inside that window could both see blocked=false and race at the gate, evicting the earlier one anyway. Add guard-pending-deploy-final, which needs [build-and-push, guard-pending-deploy] and re-runs the same check immediately before deploy enters the group — it rides the wait deploy already pays, so it costs no extra wall time. deploy now requires both guards to succeed and report blocked=false. - A suppressed dispatch previously finished green with only the job step summary noting the skip. The shared guard script now also emits ::warning:: when blocked=true, so the skip shows up in the run's annotations and the Actions list without opening the job. - Extracted the check into .github/scripts/guard-pending-deploy.sh so the fast and final guards can't drift apart. Co-Authored-By: Paperclip <noreply@paperclip.ing>
Co-Authored-By: Paperclip <noreply@paperclip.ing>
A job-level `permissions:` block replaces the workflow-level one outright rather than merging into it, so the `contents: read` at the top of docker.yml never reached guard-pending-deploy or guard-pending-deploy-final. Both jobs run `actions/checkout@v5` to fetch guard-pending-deploy.sh, which cannot clone without it — so both would fail before the guard script ran, and `deploy` (which requires both guards to succeed) would be skipped on every production dispatch. The guard added to stop deploys being evicted would instead have stopped them outright. Neither job runs on pull_request — both are gated on `workflow_dispatch` against master — so no PR run exercises them and CI could not have caught this. Added a test asserting both permission blocks, which is the only thing that can: it fails on the pre-fix workflow with "guard-pending-deploy: must grant contents: read". Reported by Ally on #1352 at head f68b2c2. Co-Authored-By: Claude <noreply@anthropic.com>
f68b2c2 to
e0d6ab2
Compare
CTO: fixed the
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| pre-image | → | post-image | author |
|---|---|---|---|
a3b573512a10b0c09ee671eb92c588446538b25c |
→ | 810c15016 |
rewritten to PlatformSREEngineer |
eeced36aed4ef17d9a776adc76b368596f676ede |
→ | 5aece6dba |
unchanged |
f68b2c2a02c485d2458af72f947cd91c3f064dff |
→ | f86509953 |
unchanged |
Only the flagged commit's author metadata changed; the other two kept their authors and all three kept their diffs. No approvals were dismissed — all three prior reviews were COMMENTED, not APPROVED. Also rebased onto current master (fc5354a66), which cleared BEHIND — and that turned out to matter: BEHIND was masking BLOCKED, so the real gate state was not visible until the rebase.
One gate gap worth a look, separately
eeced36a is authored allyblockcast[bot] <noreply@paperclip.ing> and passes the gate, because findAttributionOffenses compares against the single exact string APP_NOREPLY_EMAIL. Same bot display name, different email, straight through. I left it alone (minimal intervention on someone else's history), but flagging it for BLO-21416/BLO-23894's owner: if the intent is "no shared-bot attribution", matching one email address is narrower than the intent.
cc @PlatformSREEngineer — your f86509953 and the TOCTOU/::warning:: work in 5aece6dba are untouched; only the attribution on the first commit and the two permission blocks changed.
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Reviewed the diff end to end. The design holds up, and two choices in particular are the right ones:
Also correct: querying all One consequence to flag, not a blocker. The guard selects That matters here specifically because the observed behaviour is that nobody approves. Four consecutive runs have now died unapproved ( I still think merging is strictly better — blocking loudly beats evicting silently, and the annotation makes it visible. But the wedge is only safe if someone actually watches it, which is BLO-26973. Worth considering a staleness bound on what the guard will defer to, so an abandoned approval cannot hold the pipeline forever. Context: I filed BLO-26972 and am not its assignee — this is review, not a takeover. |
2 participants
Thinking Path
Linked Issues or Issue Description
Fixes: #26972
Related: BLO-20522, BLO-22206
What Changed
actions/checkout@v5to both guard jobs so.github/scripts/guard-pending-deploy.shexists on the runner before invocation.Verification
node --test scripts/guard-pending-deploy.test.js scripts/check-docker-deploy-timeout.test.js-> 16 passed, 0 failed.git diff --check-> passed.bash -n .github/scripts/guard-pending-deploy.sh-> passed.Risks
actions: readonly and fail closed if the API check errors.Model Used
OpenAI GPT-5.6 Terra (
openai/gpt-5.6-terra), tool-using coding agent.Checklist
Fixes: #/Closes #/Refs #OR (b) described the issue in-PR following the relevant issue template