name: Staleness tests

on:
  schedule:
    # Run daily at 10 AM UTC (2 AM PDT)
    - cron: 0 10 * * *
  workflow_call:
    inputs:
      safe-checkout:
        required: false
        description: "The SHA key for the commit we want to run over"
        type: string
  workflow_dispatch:

permissions: {}
jobs:
  test:
    strategy:
      fail-fast: false
      matrix:
        branch: [main, 22.x, 23.x, 24.x]
        os: [{ name: Linux, value: ubuntu-latest}]

    name: Test staleness ${{ matrix.os.name }} ${{ github.head_ref && 'PR' || matrix.branch }}
    runs-on: ${{ matrix.os.value }}
    if: ${{ github.event.repository.full_name == 'protocolbuffers/protobuf' }}
    steps:
      - name: Checkout ${{ github.head_ref && 'PR' || matrix.branch }}
        uses: protocolbuffers/protobuf-ci/checkout@v2
        with:
          ref: ${{ inputs.safe-checkout || github.head_ref || matrix.branch }}

      - name: Mark runs associated with commits
        if: ${{ github.event_name != 'schedule' && github.event_name != 'workflow_dispatch' }}
        run: echo "COMMIT_TRIGGERED_RUN=1" >> $GITHUB_ENV

      - name: Mark runs from the main branch
        if: ${{ github.base_ref == 'main' || github.ref == 'refs/heads/main' }}
        run: echo "MAIN_RUN=1" >> $GITHUB_ENV

      - name: Run all staleness tests
        # Run all tests if either of the following is true, otherwise simply run the query to make
        # sure it continues to work:
        # 1) If this is not a commit-based run it means it's scheduled or manually dispatched. In
        #    this case we want to make sure there are no stale files.
        # 2) Release branches don't work with automated commits (see b/287117570).  Until this is
        #    fixed, we want to run the tests to force manual regeneration when necessary.
        #
        # In branches where automatic updates work as post-submits, we don't want to run staleness
        # tests along with user changes.  Any stale files will be automatically fixed in a follow-up
        # commit.
        run: |
          if [[ -z $COMMIT_TRIGGERED_RUN || -z $MAIN_RUN ]]; then
            bazel query 'attr(tags, "staleness_test", //...)' | xargs bazel test $BAZEL_FLAGS || \
              echo "Please run ./regenerate_stale_files.sh to regenerate stale files"
          else
            bazel query 'attr(tags, "staleness_test", //...)'
          fi
