chore(ci): pass workflow_run PR lookup inputs via env - #538
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Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe coverage and leaderboard comment workflows now pass pull request repository and branch values through step-level environment variables. They also pin artifact download and GitHub Script actions to commit SHAs. ChangesWorkflow hardening
Merge Risk: ⚪ Minimal · up to The workflows now pass PR lookup values through step environment variables while preserving lookup behavior; no actionable merge-blocking risk remains after normal checks and review. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
✨ Simplify code
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Actionable comments posted: 1
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Inline comments:
In @.github/workflows/coverage-comment.yml:
- Around line 29-31: Pin every actions/download-artifact reference (v7 and v4)
and both actions/github-script v9 references to their full immutable commit
SHAs. Apply this in .github/workflows/coverage-comment.yml lines 29-31 and
.github/workflows/leaderboard-comment.yml lines 26-28; both sites require the
action-reference updates.
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.github/workflows/coverage-comment.yml.github/workflows/leaderboard-comment.yml
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Keep the current major versions, but reference download-artifact and github-script by commit SHA so those versions cannot drift under the floating tags. Co-authored-by: Cursor <cursoragent@cursor.com>
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@jwm4 please take a look at this PR. |
jwm4
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jwm4
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Full disclosure: I knew basically nothing about this topic when I started reviewing this PR, so I went and learned as I went.
A few things I picked up along the way that helped me understand what this fix is doing:
- The
${{ ... }}expressions in a workflow aren't like normal variables. The runner pastes their value straight into the shell script text before bash runs it. So the value becomes part of the script itself, not just data the script reads. - A branch name (
head_branch) is chosen by whoever opens the PR, including someone from a fork, and git allows characters like`and$( )in branch names. So a branch named something like$(...)gets pasted into the script and executed. That's the code injection. - It's especially risky here because these
workflow_runjobs run in the upstream repo's context with write permissions, so injected code would run with real access.
The fix moves those untrusted values into the step's env: block instead. That way bash reads them as plain environment variables (already quoted in the script), so a malicious branch name is just treated as text and never runs as code. From what I read, that's the standard recommended way to handle this.
I also ran actionlint and a YAML parse check on both files locally and they pass, and I confirmed the shell steps only use the quoted variables now. I also see CodeRabbit's suggestion to pin the actions to commit SHAs was already addressed in the branch.
So while I'm definitely not an expert on this, this fix looks good to me and I think it will solve the problem. Thanks for the clear write-up.
(This comment is from Bill Murdock, with assistance from Claude Code.)
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🎉 This PR is included in version 2.52.1 🎉 The release is available on GitHub release Your semantic-release bot 📦🚀 |
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Summary
Pass
workflow_runPR lookup inputs through stepenv:in the coverage and leaderboard comment workflows, instead of embedding GitHub expressions in the shell script body.This is a small future-proofing change so those values are treated as data by the runner, not as part of the generated bash text. PR lookup behavior is unchanged: same-repo vs fork
gh pr viewqueries still work the same way, and job permissions are unchanged.Changes
.github/workflows/coverage-comment.yml—HEAD_REPO,HEAD_BRANCH, andTARGET_REPOcome fromenv:.github/workflows/leaderboard-comment.yml— same patternTest plan
pr_infostep still uses quoted shell variablesactionlinton the updated workflows when available111 passed, 3 skippedontests/unit/cli/test_main.pyandtests/unit/test_models.py)AI-Attribution: AIA PAI Nc Hin R gpt-5.4 v1.0
AI-Interpretation: https://aiattribution.github.io/statements/AIA-PAI-Nc-Hin-R-?model=gpt-5.4
Summary by CodeRabbit