prettier.yml

name: Run Prettier

permissions:
  contents: write

on:
  push:
    branches: [main]

jobs:
  check:
    runs-on: ubuntu-20.04
    concurrency:
      group: ${{ github.workflow }}-${{ github.ref }}
      cancel-in-progress: true
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Setup Node
        uses: actions/setup-node@v2
        with:
          node-version-file: .node-version

      - name: Install Prettier
        run: |
          PRETTIER_VERSION="$(node -p "require('./package.json').devDependencies.prettier")"
          npm install --global "prettier@$PRETTIER_VERSION"

      - name: Check Formatting
        id: check
        run: prettier --check .

      - name: Reformat & Commit
        if: ${{ failure() && steps.check.conclusion == 'failure' }}
        run: |
          prettier --list-different --write .
          prettier --check .
          if [[ $? -eq 0 ]]; then
            echo "Looks good, pushing changes..."
            git config --local user.email "github-actions[bot]@users.noreply.github.com"
            git config --local user.name "GitHub Actions"
            git add .
            git commit -m "Reformat using Prettier"
            git push
          else
            echo "Prettier failed to produce stable output, skipping!"
            exit 1
          fi