# GitHub Action that uses Black to reformat the Python code in an incoming pull request.
# If all Python code in the pull request is complient with Black then this Action does nothing.
# Othewrwise, Black is run and its changes are committed back to the incoming pull request.
# https://github.com/cclauss/autoblack

name: autoblack
on: [pull_request]
jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      max-parallel: 1
      matrix:
        python-version: [3.7]
    steps:
      - uses: actions/checkout@v1
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v1
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install psf/black
        run: pip install black
      - name: Run black --check .
        run: black --check .
      - name: If needed, commit black changes to the pull request
        if: failure()
        run: |
          black .
          git config --global user.name 'autoblack'
          git config --global user.email 'cclauss@users.noreply.github.com'
          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/$GITHUB_REPOSITORY
          git checkout $GITHUB_HEAD_REF
          git commit -am "fixup: Format Python code with psf/black"
          git push