github_ci.yml

name: Java CI

on:
  pull_request:
  workflow_dispatch:

jobs:
  build:
    name: Build
    strategy:
      matrix:
        os: [ubuntu-latest, windows-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: 'temurin'
      - name: Build with Gradle
        run: ./gradlew assemble

  check:
    name: Check files
    outputs:
        tests_changed: ${{ steps.check_files.outputs.tests_changed }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
      - name: Check modified files
        id: check_files
        run: |
          git diff --name-only origin/master HEAD > files.txt
          tests_changed=false
          while IFS= read -r file; do
            if [[ $file == */test/* ]]; then
              tests_changed=true
              break
            fi
          done < files.txt
          echo "tests_changed=$tests_changed" >> $GITHUB_OUTPUT

  junit_test_changed:
    name: JUnit (matrix build)
    needs: [build, check]
    if: ${{ needs.check.outputs.tests_changed == 'true' }}
    strategy:
      matrix:
        os: [windows-latest, macos-latest]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: 'temurin'
      - name: JUnit
        run: ./gradlew test

  junit:
    name: JUnit (Linux only)
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: 'temurin'
      - name: JUnit
        run: ./gradlew test

  spotless:
    name: Spotless
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: 'temurin'
      - name: Spotless
        run: ./gradlew spotlessJavaCheck

  checkstyle:
    name: Checkstyle
    needs: build
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Set up JDK 21
        uses: actions/setup-java@v4
        with:
          java-version: '21'
          distribution: 'temurin'
      - name: Checkstyle
        run: ./gradlew checkstyleMain checkstyleTest