on-pr-dart-auto-format.yml

name: Auto Format Dart code
on:
  pull_request:
    branches: [main]

env:
  GITHUB_BASE_REF: ${{github.base_ref}}

jobs:
  pr-auto-format:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3

      - name: Setup Dart
        uses: dart-lang/setup-dart@v1
        with:
          sdk: 2.19.3

      - name: Auto Format Changed Dart Files
        continue-on-error: true
        shell: bash
        run: |
          # Fetch the base branch for diffing
          git fetch origin $GITHUB_BASE_REF:$GITHUB_BASE_REF
          # Format the changed dart files
          git diff --name-only $GITHUB_BASE_REF..HEAD | grep "\.dart" | xargs --no-run-if-empty dart format

      - name: Check for modified files
        id: git-check
        shell: bash
        run: |
          echo "modified=$(if git diff-index --quiet HEAD --; then echo "false"; else echo "true"; fi)" >> $GITHUB_OUTPUT

      - name: Commit and push if files changed
        if: steps.git-check.outputs.modified == 'true'
        uses: stefanzweifel/git-auto-commit-action@v4
        with:
          commit_message: "Auto format dart files in #${{ github.event.pull_request.number }}"