name: "Main / Pull requests build"
on:
    pull_request:
        paths-ignore:
            - '.txt'
            - 'LICENSE'
            - 'docs/**'
        branches: [ main ]
    push:
        branches:
            - main

jobs:
    build:
        runs-on: ${{ matrix.os }}
        strategy:
            fail-fast: true
            matrix:
                os: [ windows-latest, ubuntu-latest, macos-13 ]
            max-parallel: 1
        steps:
            -   uses: actions/checkout@v4.1.6
            -   name: Set up JDK 21
                uses: actions/setup-java@v4.2.1
                with:
                    distribution: 'temurin'
                    java-version: 21
                    architecture: x64
            -   name: Cache Maven packages
                uses: actions/cache@v4.0.2
                with:
                    path: ~/.m2
                    key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
                    restore-keys: ${{ runner.os }}-m2-
            -   name: Build with Maven
                run: mvn --no-transfer-progress verify