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ci: look up fork PRs via the head repository in type-diff-comment #410

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Merged
TooTallNate merged 1 commit into from
Jul 6, 2026
Merged

ci: look up fork PRs via the head repository in type-diff-comment #410

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22 changes: 14 additions & 8 deletions .github/workflows/type-diff-comment.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -46,22 +46,28 @@ jobs:
const run = context.payload.workflow_run;

// Resolve the PR number. `workflow_run.pull_requests` is empty
// for fork PRs, so fall back to looking up open PRs by the run's
// head SHA. For `pull_request`-triggered runs the head SHA is the
// PR branch tip, but also match `merge_commit_sha` defensively in
// case it is the synthetic merge commit.
// for fork PRs, so fall back to looking up PRs by the run's head
// SHA. The commit lives in the HEAD repository (the fork), so the
// commit→PRs lookup must be done there — querying the base repo
// returns nothing for fork commits. Filter to PRs that target
// this repo and whose head is exactly the run's head SHA.
let prNumber = run.pull_requests?.[0]?.number;
if (!prNumber) {
const headOwner =
run.head_repository?.owner?.login ?? context.repo.owner;
const headRepo = run.head_repository?.name ?? context.repo.repo;
const { data: prs } =
await github.rest.repos.listPullRequestsAssociatedWithCommit({
owner: context.repo.owner,
repo: context.repo.repo,
owner: headOwner,
repo: headRepo,
commit_sha: run.head_sha,
});
const baseFullName = `${context.repo.owner}/${context.repo.repo}`;
const pr = prs.find(
(p) =>
p.head.sha === run.head_sha ||
p.merge_commit_sha === run.head_sha,
p.base.repo.full_name === baseFullName &&
(p.head.sha === run.head_sha ||
p.merge_commit_sha === run.head_sha),
);
prNumber = pr?.number;
}
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