commitlint.yml

name: Commitlint

on:
  pull_request:
    branches: [main]

permissions:
  contents: read

jobs:
  commitlint:
    name: Validate commit messages
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v7
        with:
          fetch-depth: 0

      # Reuses .githooks/commit-msg so there is a single source of truth for
      # the Conventional Commits rule — no Node/commitlint install required,
      # so this works the same for every language this template is used for.
      - name: Check commit messages
        run: |
          set -e
          chmod +x .githooks/commit-msg
          FAILED=0
          for sha in $(git rev-list "${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }}"); do
            git log -1 --format=%B "$sha" > /tmp/commit-msg
            if ! .githooks/commit-msg /tmp/commit-msg; then
              echo "::error::Commit $sha does not follow Conventional Commits"
              FAILED=1
            fi
          done
          exit "$FAILED"