# .github/workflows/gitlint.yml
# GitHub Actions workflow to validate commit messages in PRs

name: Gitlint

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

jobs:
  gitlint:
    name: Validate Commit Messages
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          # Fetch full history to access all commits in the PR
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Python
        uses: actions/setup-python@v4
        with:
          python-version: '3.11'

      - name: Install gitlint
        run: |
          pip install gitlint==0.19.1

      - name: Get PR commit range
        id: get-range
        run: |
          # Get the commit range for this PR
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          HEAD_SHA="${{ github.event.pull_request.head.sha }}"
          echo "base-sha=${BASE_SHA}" >> $GITHUB_OUTPUT
          echo "head-sha=${HEAD_SHA}" >> $GITHUB_OUTPUT
          echo "Commit range: ${BASE_SHA}..${HEAD_SHA}"

      - name: List commits to be validated
        run: |
          echo "📝 Commits in this PR:"
          git log --oneline ${{ steps.get-range.outputs.base-sha }}..${{ steps.get-range.outputs.head-sha }}

      - name: Validate commit messages
        run: |
          echo "🔍 Validating commit messages with gitlint..."

          # Validate each commit in the PR
          gitlint --commits ${{ steps.get-range.outputs.base-sha }}..${{ steps.get-range.outputs.head-sha }}

          echo "✅ All commit messages are valid!"

      - name: Provide feedback on failure
        if: failure()
        run: |
          echo ""
          echo "❌ Some commit messages don't follow our guidelines!"
          echo ""
          echo "📖 Please check our commit message format:"
          echo "   type(scope): description"
          echo ""
          echo "🏷️  Valid types: feat, fix, docs, style, refactor, test, chore, ci, perf, build"
          echo ""
          echo "✅ Good examples:"
          echo "   feat(nodepool): add support for spot instances"
          echo "   fix(errors): replace HTTP status literals with constants"
          echo "   docs: update installation instructions"
          echo "   test(provider): add unit tests for instance creation"
          echo ""
          echo "🔗 See CONTRIBUTING.md for detailed guidelines."
          echo ""
          exit 1