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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 ]
        dist: [ 'temurin', 'adopt-openj9' ]
        exclude:
        - os: macos-latest
          dist: 'adopt-openj9'

      fail-fast: false

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

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

# https://github.com/actions/setup-java/blob/main/docs/advanced-usage.md#modifying-maven-toolchains
      - name: Install Toolchain JDK
        if: ${{ matrix.java == '8' }}
        uses: actions/setup-java@v3
        with:
          distribution: ${{ matrix.dist }}
          java-version: 11
          cache: 'maven'

      - name: Set up JDK
        uses: actions/setup-java@v3
        with:
          distribution: ${{ matrix.dist }}
          java-version: ${{ matrix.java }}
          cache: 'maven'

      - name: Build with Maven
        run: mvn verify --errors --batch-mode --show-version -Prun-its