timeline-check.yml

name: timeline-check

on:
  pull_request:
    types: [labeled, unlabeled, opened, synchronize, reopened]
  merge_group:
permissions:
  contents: write

jobs:
  assign-pr-number:
    if: |
      !contains(github.event.pull_request.labels.*.name, 'skip:changelog')
      && !contains(fromJSON('["flow:merge-queue", "flow:hotfix"]'), github.event.label.name)
      && github.event.pull_request.number != null
      && github.event.pull_request.merged == false
      && github.event.pull_request.draft == false
    uses: ./.github/workflows/assign-pr-number.yml
    secrets:
      WORKFLOW_PAT: ${{ secrets.OCTODOG }}

  towncrier:
    needs: [assign-pr-number]
    runs-on: ubuntu-latest
    steps:
    - name: Get PR's fetch depth
      run: echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 1 ))" >> "${GITHUB_ENV}"
    - name: Checkout the revision
      uses: actions/checkout@v4
      with:
        lfs: false
        fetch-depth: ${{ env.PR_FETCH_DEPTH }}
        sparse-checkout: |
          changes
          tools
    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: "3.12"
        check-latest: true
    - name: Install dependencies
      run: |
        python -m pip install -U pip setuptools
        python -m pip install -U -r tools/towncrier-requirements.txt
    - name: Check existence of news fragment
      run: |
        BASE_COMMIT=$(git rev-list --first-parent --max-parents=0 --max-count=1 HEAD)
        BASE_TIMESTAMP=$(git log --format=%ct "${BASE_COMMIT}")
        git fetch --no-tags --shallow-since "${BASE_TIMESTAMP}" origin "${BASE_REF}"
        python -m towncrier.check --compare-with=origin/${BASE_REF}
      env:
        BASE_REF: ${{ github.event.pull_request.base.ref }}
        PR_NUMBER: ${{ github.event.pull_request.number }}