name: pixeltext-review
on: pull_request_target
jobs:
  comment:
    runs-on: ubuntu-latest
    steps:
      - name: Clone
        uses: actions/checkout@v2
      - name: Look for changed reference images
        uses: actions/github-script@v4
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            const { execSync } = require('child_process');

            function get_path_sha(root, path) {
               execSync('git fetch --depth=1 origin ' + root);
               const val = execSync('git rev-parse --verify --quiet ' + root + ':' + path + '|| true');
               return val.toString().trim();
            }

            const head = context.payload.pull_request.head.sha;
            const base = context.payload.pull_request.base.sha;

            const head_test_reference = get_path_sha(head, 'test/reference');
            const base_test_reference = get_path_sha(base, 'test/reference');

            core.info("shas: " + head_test_reference + ", " + base_test_reference);

            if (head_test_reference != base_test_reference) {
              core.info("commenting");
              github.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: 'Pixel test references have changed in ' + head + '.  You can review them [here](/cockpit-project/pixel-test-reference/compare/' + (base_test_reference || "empty") + '..' + (head_test_reference || "empty") + ').'
              })
            }