maven.yml

name: Build

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        java: [ 6, 8, 11, 17 ]
    name: Build with Java ${{ matrix.java }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up JDK 6
        if: ${{ matrix.java == '6'}}
        # We use v1 as newer versions do not seem to support Java 6
        # Inspired by https://github.com/junit-team/junit4/blob/main/.github/workflows/main.yml
        uses: actions/setup-java@v1
        with:
          java-version: ${{ matrix.java }}
          mvn-toolchain-id: ${{ matrix.java }}
      - name: Set up toolchains.xml for Java 6
        # We need to manually set up toolchains.xml as setup-java@v1 does not seem to support toolchains.xml
        if: ${{ matrix.java == '6'}}
        run: |
          echo "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" >> $HOME/.m2/toolchains.xml
          echo "<toolchains>" >> $HOME/.m2/toolchains.xml
          echo "  <toolchain>" >> $HOME/.m2/toolchains.xml
          echo "    <type>jdk</type>" >> $HOME/.m2/toolchains.xml
          echo "    <provides>" >> $HOME/.m2/toolchains.xml
          echo "      <version>6</version>" >> $HOME/.m2/toolchains.xml
          echo "    </provides>" >> $HOME/.m2/toolchains.xml
          echo "    <configuration>" >> $HOME/.m2/toolchains.xml
          echo "      <jdkHome>${JAVA_HOME_6_0_119_X64}</jdkHome>" >> $HOME/.m2/toolchains.xml
          echo "    </configuration>" >> $HOME/.m2/toolchains.xml
          echo "  </toolchain>" >> $HOME/.m2/toolchains.xml
          echo "</toolchains>" >> $HOME/.m2/toolchains.xml
          cat $HOME/.m2/toolchains.xml
      - name: Set up JDK
        if: ${{ matrix.java != '6'}}
        uses: actions/setup-java@v3
        with:
          java-version: ${{ matrix.java }}
          mvn-toolchain-id: ${{ matrix.java }}
          distribution: temurin
          cache: maven
      - name: Set up JDK 17
        # Set up JDK 17 as the last step before building so it becomes default and Maven would use it
        uses: actions/setup-java@v3
        with:
          java-version: 17
          mvn-toolchain-id: 17
          distribution: temurin
          cache: maven

      - name: Build on Java 6, run tests with Java 17
        # Java 6 is special case, we need to activate a profile on it
        if: ${{ matrix.java == '6'}}
        run: |
          chmod +x mvnw
          ./mvnw -ntp -B -P java6 -DtestJdk=17 test

      - name: Build on Java 8, run tests with Java 17
        # Java 8 is also a special case, we need to activate a profile on it
        if: ${{ matrix.java == '8'}}
        run: |
          chmod +x mvnw
          ./mvnw -ntp -B -P java8 -DtestJdk=17 test

      - name: Build and test on Java ${{ matrix.java }}
        # More modern JDKs support specifying a target JDK release for the compiler
        if: ${{ matrix.java != '6' && matrix.java != '8' }}
        run: |
          chmod +x mvnw
          ./mvnw -ntp -B -DmainJdk=${{ matrix.java }} verify package
          mkdir upload && cp target/*.jar upload

      - uses: actions/upload-artifact@v3
        with:
          name: Upload artifacts
          path: upload