code_metrics.yml

name: Code metrics

# Controls when the workflow will run
on:
  # Triggers the workflow on pull request events but only for the master branch
  pull_request:
    branches: [main]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:

jobs:
  code_metrics:
    name: "Code Metrics"
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2.4.2

      - name: Setup Flutter
        uses: subosito/flutter-action@v2.6.2

      - name: Cache dependencies
        uses: actions/cache@v3.0.8
        with:
          path: |
            $PUB_CACHE
          key: ${{ runner.os }}-pub-${{ hashFiles('**/pubspec.lock') }}
          restore-keys: |
            ${{ runner.os }}-pub-

      - name: Get dependencies
        run: flutter pub get

      - name: Check for unused files and code
        run: |
          dart run dart_code_metrics:metrics check-unused-files lib || exit 1
          dart run dart_code_metrics:metrics check-unused-code lib || exit 1