commitlint.yml

name: Commitlint

on:
  pull_request:
    types: [opened, edited, synchronize]

jobs:
  commitlint:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v5
        with:
          fetch-depth: 0

      - name: Check PR title
        env:
          PR_TITLE: ${{ github.event.pull_request.title }}
        run: |
          # Conventional commit pattern: type(scope)?: description
          pattern='^(feat|fix|docs|style|refactor|perf|test|chore|ci|build|revert)(\([a-z0-9-]+\))?: .+'
          
          if [[ ! "$PR_TITLE" =~ $pattern ]]; then
            echo "❌ PR title does not follow conventional commits format"
            echo ""
            echo "Expected: <type>: <description>"
            echo "Got: $PR_TITLE"
            echo ""
            echo "Valid types: feat, fix, docs, style, refactor, perf, test, chore, ci, build, revert"
            echo ""
            echo "Examples:"
            echo "  feat: add new feature"
            echo "  fix: resolve memory leak"
            echo "  feat(parser): add ruby support"
            exit 1
          fi
          
          echo "✅ PR title follows conventional commits: $PR_TITLE"