.github/workflows/dcm-weekly-checks.yaml

name: Weekly DCM Checks

on:
  pull_request: # Temporary for testing. Remove before merging.
  schedule:
    - cron: '0 8 * * 1' # Every Monday at 8am
  workflow_dispatch:

permissions: read-all

jobs:
  flutter-prep:
    uses: ./.github/workflows/flutter-prep.yaml

  dcm_check:
    needs: flutter-prep
    runs-on: ubuntu-latest
    permissions:
      issues: write
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Load Cached Flutter SDK
        uses: actions/cache@8b402f58fbc84540c8b491a91e594a4576fec3d7
        with:
          path: |
            ./tool/flutter-sdk
          key: flutter-sdk-${{ runner.os }}-${{ needs.flutter-prep.outputs.latest_flutter_candidate }}

      - name: Setup PATHs
        run: |
          echo "$(pwd)/tool/flutter-sdk/bin" >> $GITHUB_PATH
          echo "$(pwd)/tool/flutter-sdk/bin/cache/dart-sdk/bin" >> $GITHUB_PATH

      - name: Install DCM
        run: |
          sudo apt-get update
          wget -qO- https://dcm.dev/pgp-key.public | sudo gpg --dearmor -o /usr/share/keyrings/dcm.gpg
          echo 'deb [signed-by=/usr/share/keyrings/dcm.gpg arch=amd64] https://dcm.dev/debian stable main' | sudo tee /etc/apt/sources.list.d/dart_stable.list
          sudo apt-get update
          sudo apt-get install dcm=1.38.1-1
          sudo chmod +x /usr/bin/dcm
          echo "$(dcm --version)"
          
      - name: Install dependencies
        run: |
          dart pub get
          cd packages/devtools_app && flutter pub get
          cd ../devtools_app_shared && flutter pub get
          cd ../devtools_extensions && flutter pub get
          cd ../devtools_shared && dart pub get
          cd ../devtools_test && flutter pub get
          
      - name: Run DCM unused checks
        run: |
          echo "Running check-unused-code..."
          dcm check-unused-code -c packages/devtools_app/lib/src/framework/scaffold/status_line.dart > raw_unused_code.txt || echo "found_code=true" >> $GITHUB_ENV
          grep '^• ' raw_unused_code.txt | sed 's/^• /- [ ] /' > unused_code.txt || true
          
          echo "Running check-unused-files..."
          dcm check-unused-files -c packages/devtools_app/lib/src/framework/scaffold/status_line.dart > raw_unused_files.txt || echo "found_files=true" >> $GITHUB_ENV
          grep '^• ' raw_unused_files.txt | sed 's/^• /- [ ] /' > unused_files.txt || true

      - name: Create Issue if findings
        if: env.found_code == 'true' || env.found_files == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          echo "The weekly DCM checks found unused code or files. Please review the findings below." > issue_body.md
          echo "" >> issue_body.md
          echo "### How to run locally" >> issue_body.md
          echo "To run these checks locally, you can use the following commands from the root of the repository:" >> issue_body.md
          echo "\`\`\`sh" >> issue_body.md
          echo "dcm check-unused-code packages/devtools_app/" >> issue_body.md
          echo "dcm check-unused-files packages/devtools_app/" >> issue_body.md
          echo "\`\`\`" >> issue_body.md
          echo "" >> issue_body.md
          
          if [ "$found_code" == "true" ]; then
            echo "### Unused Code" >> issue_body.md
            cat unused_code.txt >> issue_body.md
          fi
          
          if [ "$found_files" == "true" ]; then
            echo "### Unused Files" >> issue_body.md
            cat unused_files.txt >> issue_body.md
          fi
          
          gh issue create \
            --title "Weekly DCM Checks: Unused code or files found" \
            --body-file issue_body.md \
            --label "cleanup"