commit-lint.yml

name: Commit Lint

on:
  pull_request:
    branches: [ main ]
    types: [ opened, reopened, synchronize ]

permissions:
  contents: read

jobs:
  commits:
    name: Commit messages
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"

      - name: Install commitlint
        run: |
          npm install --no-save \
            @commitlint/cli \
            @commitlint/config-conventional

      - name: Write commitlint config
        run: |
          cat > commitlint.config.cjs <<'EOF'
          module.exports = {
            extends: ['@commitlint/config-conventional'],
            rules: {
              'subject-case': [2, 'never', ['upper-case', 'pascal-case', 'start-case']],
              'header-max-length': [2, 'always', 100],
              'body-max-line-length': [2, 'always', 100],
              'footer-max-line-length': [2, 'always', 100],
            },
          };
          EOF

      - name: Lint commits in PR range
        run: |
          npx commitlint \
            --from "${{ github.event.pull_request.base.sha }}" \
            --to "${{ github.event.pull_request.head.sha }}" \
            --verbose