.github/workflows/lint.yml

name: lint and format

on: [push, pull_request]

permissions: {}

jobs:
  lint:
    # We want to run on external PRs, but not on our own internal PRs as they'll be run
    # by the push to the branch. Without this if check, checks are duplicated since
    # internal PRs match both the push and pull_request events.
    if:
      github.event_name == 'push' || github.event.pull_request.head.repo.full_name !=
      github.repository

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

      - name: Assert PR target is main
        if: github.event_name == 'pull_request' && github.repository == 'psf/black'
        run: |
          if [ "$GITHUB_BASE_REF" != "main" ]; then
              echo "::error::PR targeting '$GITHUB_BASE_REF', please refile targeting 'main'." && exit 1
          fi

      - name: Set up Python
        uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
        with:
          python-version: "3.14"
          pip-version: "25.3"
          pip-install: -e . --group tox

      - name: Run pre-commit hooks
        uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1

      - name: Format ourselves
        run: tox -e run_self

      - name: Regenerate schema
        run: |
          tox -e generate_schema
          git diff --exit-code