.github/workflows/maven.yml

name: Java Test Coverage with Maven, Coveralls

on:
    pull_request:
    push:
        branches: [ master ]
    workflow_dispatch:

env:
    MAVEN_OPTS: -Xmx4g -Xms1g
    repo_token: ${{secrets.coveralls_token}}

jobs:
    build:
        name: Build, Test, Coverage
        runs-on: ubuntu-latest
        
        steps:
        - name: "Checkout ${{ github.ref }} ( ${{ github.sha }} )"
          uses: actions/checkout@v2
          with:
              persist-credentials: false

        - name: Cache local Maven repository
          uses: actions/cache@v2
          with:
              path: ~/.m2/repository
              key: build-${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
              restore-keys: build-${{ runner.os }}-maven-

        - name: Install JDK
          uses: AdoptOpenJDK/install-jdk@v1
          with:
              version: '8'
              architecture: x64
              impl: hotspot
              targets: 'JDK_8;JAVA_HOME'

        - name: Install Dependencies
          run: >
              mvn clean install -B -V -q
              -DskipTests=true
              -Dmaven.javadoc.skip=true
              -Dgpg.skip=true
              --toolchains .github/workflows/.toolchains.xml
        
        - name: Test & Report
          if: ${{ success() }}
          run: >
              mvn verify coveralls:report -B -V -q
              -Dcoveralls-repo-token=${repo_token}
              -Dmaven.javadoc.skip=true
              -Dgpg.skip=true
              --toolchains .github/workflows/.toolchains.xml