esp-idf/.github/workflows/pre_commit_check.yml

name: Check pre-commit rules

on:
  pull_request:

jobs:
  pre_commit_check:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Fetch head and base refs
        # This is necessary for pre-commit to check the changes in the PR branch
        run: |
          git fetch origin ${GITHUB_BASE_REF}
          git fetch origin ${GITHUB_HEAD_REF}
      - name: Set up Python environment
        uses: actions/setup-python@master
        with:
          python-version: v3.7
      - name: Install python packages
        run: |
          pip install pre-commit
          pre-commit install-hooks
      - name: Run pre-commit and check for any changes
        run: |
          if ! pre-commit run --from-ref "origin/${GITHUB_BASE_REF}" --to-ref "origin/${GITHUB_HEAD_REF}" --show-diff-on-failure ; then
            echo ""
            echo "::notice::It looks like the commits in this PR have been made without having pre-commit hooks installed."
            echo "::notice::Please see https://docs.espressif.com/projects/esp-idf/en/latest/esp32/contribute/install-pre-commit-hook.html for instructions."
            echo ""
            exit 1
          fi