format.yml

name: Format Code

on:
  pull_request:
    branches: [main, test]

jobs:
  format:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.repo.full_name == github.repository && github.head_ref || '' }}
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: "20"
          cache: "npm"

      - name: Install dependencies
        run: npm ci

      - name: Run Prettier
        run: npm run format

      - name: Run ESLint Fix
        run: npm run lint:fix

      - name: Check for changes
        id: changes
        run: |
          if [ -n "$(git status --porcelain)" ]; then
            echo "has_changes=true" >> $GITHUB_OUTPUT
          else
            echo "has_changes=false" >> $GITHUB_OUTPUT
          fi

      # Auto-commit for internal PRs
      - name: Commit formatting changes
        if: steps.changes.outputs.has_changes == 'true' && github.event.pull_request.head.repo.full_name == github.repository
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git add -A
          git commit -m "style: auto-format code with prettier/eslint

          🤖 Automated formatting by GitHub Actions"
          git push

      # Fail for fork PRs so contributors know to run formatting locally
      - name: Require formatted code (fork PRs)
        if: steps.changes.outputs.has_changes == 'true' && github.event.pull_request.head.repo.full_name != github.repository
        run: |
          echo "::error::Code is not formatted. Please run these commands locally and push:"
          echo "  npm run format"
          echo "  npm run lint:fix"
          exit 1