backend.yml

# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven

# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

name: CI Backend (Java/Maven)

on:
  workflow_dispatch: 
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' && !contains(github.event.pull_request.labels.*.name, 'ci:full') }}

jobs:
  build:
    runs-on: ubuntu-latest
    timeout-minutes: 15
    strategy:
      fail-fast: false
      matrix:
        # jdk: ['11']
        # # temurin is Eclipse/AdoptOpenJDK/Adoptium
        # # 'liberica' is a preferred Spring SDK
        # # zulu has 2030 EOL for JDK 8
        # distribution: ['zulu']
        # experimental: [false]
        include:
          - jdk: '17'
            distribution: temurin
            experimental: true
          - jdk: '21'
            distribution: liberica
            experimental: true
          - jdk: '23'
            # current, can test on Oracle JDK while it's supported for 6mo
            distribution: oracle
            experimental: true
          - jdk: '24-ea'
            distribution: zulu
            experimental: true
    continue-on-error: ${{ matrix.experimental }}

    steps:
    - uses: actions/checkout@v4
    - name: Set up JDK
      uses: actions/setup-java@v4
      with:
        java-version: ${{ matrix.jdk }}
        distribution: ${{ matrix.distribution }}
        cache: maven
    - uses: actions/cache@v4
      with:
        path: ~/.m2/repository
        key: ${{ runner.os }}-${{ matrix.jdk }}_${{ matrix.distribution }}-maven-${{ hashFiles('**/pom.xml') }}
        restore-keys: |
          ${{ runner.os }}-${{ matrix.jdk }}_${{ matrix.distribution }}-maven-
    - name: Build with Maven
      run: |
        cd backend
        mvn -B clean verify

    - name: Build the Docker image
      working-directory: backend
      run: docker build .