Pass the review gate's merged payload over fds, not argv - #860
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check-review-threads.sh's fetch_payload merged its three paged arrays with jq --argjson, which puts each array into a single argv string. Linux caps one argv string at MAX_ARG_STRLEN (128 KiB), so on a PR whose accumulated thread bodies pass that, jq died with "Argument list too long", the payload came back empty, and the gate fail-closed permanently on exactly the large PRs it exists for (observed live on PR #847: exit 2 with zero verdict output). The arrays now ride process-substitution file descriptors via --slurpfile; printf is a bash builtin, so the payload never appears in an exec's argument list. The new test reaches the live path with a gh shim on PATH (the existing fixtures use --from-file, which skips fetch_payload) and serves a thread page carrying one 200,000-byte body. Watched red against the unfixed script: the case fails with "line 199: jq: Argument list too long", rc=2. Green after the fix: 47/47, including the new case asserting a real CLEAR verdict with no argv error. Tested: bash scripts/test-check-review-threads.sh (47 passed, 0 failed); the same suite against the pre-fix script fails only the new case.
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📝 WalkthroughWalkthroughThe review gate now supplies large JSON collections to ChangesReview payload handling
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: 🟡 Moderate · up to Large paginated review threads can still cause the merge gate to fail without producing a verdict, so this PR is not merge-ready until all_comments uses the file-descriptor path and has a corresponding regression test. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Actionable comments posted: 1
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Inline comments:
In `@scripts/check-review-threads.sh`:
- Around line 199-210: Update the pagination path that handles all_comments so
its JSON payload is passed through a file descriptor via --slurpfile instead of
--argjson, matching the existing threads, reviews, and prcomments handling. Add
a regression case covering totalCount greater than COMMENTS_PAGE_SIZE with a
sufficiently large thread payload, and preserve the expected paginated output.
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Fix all unresolved CodeRabbit comments on this PR:
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ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro Plus
Run ID: 23ab449b-bdd3-41c9-aaa1-87ba40d7c4e3
📒 Files selected for processing (2)
scripts/check-review-threads.shscripts/test-check-review-threads.sh
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Review caught the second instance of the same defect: the pagination
path for a thread whose totalCount exceeds COMMENTS_PAGE_SIZE rebuilt
the thread with --argjson c "$all_comments", so a long thread's fully
paged comments hit the same MAX_ARG_STRLEN wall as the final merge.
It now rides a process-substitution fd via --slurpfile like the merge.
The new case shrinks COMMENTS_PAGE_SIZE to 2 and pages a three-comment
thread carrying one 200,000-byte body through a gh shim. Watched red
with only the final-merge fix applied ("line 182: jq: Argument list
too long", rc=2), green with both: 48/48.
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NOT-A-DEFECT: the undisposed bodies are the review summary (its one actionable finding, the paged-comments argjson, is RED-VERIFIED in its thread and confirmed fixed by the reviewer in 0c64cc4), a Codex usage-limit notice, CodeRabbit's walkthrough and rate-limit auto-replies, and my own review-trigger comment. None carries an unanswered finding.
1 participant
The merge gate died with "jq: Argument list too long" on any PR whose accumulated review-thread bodies exceed MAX_ARG_STRLEN (128 KiB per argv string), then fail-closed with no verdict — observed live on #847. The three paged arrays now ride process-substitution fds via --slurpfile. New live-path test with a gh shim and a 200 KB thread body: red on the unfixed script (rc=2, argv error at line 199), green after (47/47).
Summary by CodeRabbit
Bug Fixes
Tests