name: Java Google Checkstyle

permissions:
  contents: read
  pull-request: write

on: [pull_request]

jobs:
  checkstyle:
    name: 'Checkstyle Linter'
    runs-on: ubuntu-latest
    env:
      CHECKSTYLE_VERSION: '13.0.0'
      REVIEWDOG_VERSION: 'latest'
      REVIEWDOG_GITEA_API_TOKEN: ${{ secrets.REVIEWDOG_TOKEN }}
      GITEA_ADDRESS: http://gitea:3000
    steps:
      - name: 'Pull code'
        uses: actions/checkout@v6

      - name: 'Find changed Java files'
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          files: |
            **.java

      - name: 'Setup Java JDK'
        uses: actions/setup-java@v4
        with:
          java-version: '22'
          distribution: 'zulu'

      - name: 'Setup Reviewdog'
        uses: reviewdog/action-setup@v1
        with:
          reviewdog_version: latest
#          reviewdog_version: ${{ env.REVIEWDOG_VERSION }}

      - name: 'Run Checkstyle with Reviewdog'
        if: steps.changed-files.outputs.any_changed == 'true'
        run: |
          wget https://github.com/checkstyle/checkstyle/releases/download/checkstyle-${{ env.CHECKSTYLE_VERSION }}/checkstyle-${{ env.CHECKSTYLE_VERSION }}-all.jar
          
          echo "Changed files:"
          echo "${{ steps.changed-files.outputs.all_changed_files }}"

          java -jar checkstyle-${{ env.CHECKSTYLE_VERSION }}-all.jar -c ./style_guide.xml -f xml ${{ steps.changed-files.outputs.all_changed_files }} \
          | reviewdog -f=checkstyle \
          -name="Checkstyle" \
          -reporter="gitea-pr-review" \
          -level="warning" \
          -fail-on-error="true"