.github/workflows/maven.yml

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name: Java CI

on: [ push, pull_request ]

jobs:
  build:

    strategy:
      matrix:
        os: [ ubuntu-latest, windows-latest, macOS-latest ]
        java: [ 8, 11, 17 ]
      fail-fast: false

    runs-on: ${{ matrix.os }}

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up cache for ~./m2/repository
        uses: actions/cache@v3
        with:
          path: ~/.m2/repository
          key: maven-${{ matrix.os }}-java${{ matrix.java }}-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            maven-${{ matrix.os }}-java${{ matrix.java }}-
            maven-${{ matrix.os }}-
      - name: Install Toolchain JDK
        if: ${{ matrix.java == '8' }}
        uses: AdoptOpenJDK/install-jdk@v1.1.1
        with:
          version: '11'
          targets: 'TOOLCHAIN_JDK'
          impl: 'openj9'
      - name: Set up Toolchain
        if: ${{ matrix.java == '8' }}
        shell: bash
        run: |
          mkdir -p $HOME/.m2 \
          && cat << EOF > $HOME/.m2/toolchains.xml
          <?xml version="1.0" encoding="UTF8"?>
          <toolchains>
            <toolchain>
              <type>jdk</type>
                <provides>
                  <version>11</version>
                  <vendor>adopt</vendor>
                </provides>
                <configuration>
                  <jdkHome>${{ env.TOOLCHAIN_JDK }}</jdkHome>
                </configuration>
            </toolchain>
          </toolchains>
          EOF
      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          distribution: 'temurin'
          java-version: ${{ matrix.java }}
          cache: 'maven'

      - name: Build with Maven
        run: mvn verify -e -B -V -Prun-its