cleanup-stale-bot-prs.yml

name: Cleanup Stale Bot PRs

on:
  schedule:
    - cron: '0 6 * * 1'  # Weekly on Mondays
  workflow_dispatch:

permissions:
  pull-requests: write
  issues: write

jobs:
  cleanup:
    runs-on: ubuntu-latest
    steps:
      - name: Close stale automated PRs
        uses: actions/github-script@v7
        with:
          script: |
            const STALE_DAYS = 30;
            const staleDate = new Date(Date.now() - STALE_DAYS * 24 * 60 * 60 * 1000);

            // Use Search API to find PRs with the label
            // pulls.list doesn't support labels parameter
            const searchQuery = `repo:${context.repo.owner}/${context.repo.repo} is:pr is:open label:automated-bug-fix`;
            const { data: searchResults } = await github.rest.search.issuesAndPullRequests({
              q: searchQuery,
              per_page: 100
            });
            const prs = searchResults.items;

            for (const pr of prs) {
              const createdAt = new Date(pr.created_at);
              const updatedAt = new Date(pr.updated_at);

              // Only close if both created AND last updated over STALE_DAYS ago
              if (createdAt < staleDate && updatedAt < staleDate) {
                // Check if there are recent comments or review activity
                // Use 'since' parameter to let server filter comments, avoiding pagination issues
                const { data: comments } = await github.rest.issues.listComments({
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  issue_number: pr.number,
                  since: staleDate.toISOString(),
                  per_page: 100
                });

                // If any comments were returned, there's recent activity
                const hasRecentActivity = comments.length > 0;

                if (!hasRecentActivity) {
                  // Add stale label before closing
                  await github.rest.issues.addLabels({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: pr.number,
                    labels: ['stale', 'auto-closed']
                  });

                  await github.rest.issues.createComment({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    issue_number: pr.number,
                    body: `Closing this automated PR as it has been open for ${STALE_DAYS}+ days without activity or merge. The bug hunter may re-detect and fix this issue in a future run if still relevant.`
                  });

                  await github.rest.pulls.update({
                    owner: context.repo.owner,
                    repo: context.repo.repo,
                    pull_number: pr.number,
                    state: 'closed'
                  });

                  core.info(`Closed stale PR #${pr.number}`);
                } else {
                  core.info(`Skipping PR #${pr.number} - has recent activity`);
                }
              }
            }