.gitlab-ci.yml

image: ubuntu

stages:          # List of stages for jobs, and their order of execution
  - build

workflow:        # Rule to execute only on merge requests.
  rules:
    - if: $CI_PIPELINE_SOURCE == 'merge_request_event'

all-in-one-job:       # This job does all there is to be done, including testing, apparently. https://stackoverflow.com/a/17123957/14406682
  stage: build
  script:
    # Add g++ repository and update repositories.
    - echo "Starting maven execution..."
    - apt update
    - apt install -y software-properties-common
    - add-apt-repository ppa:ubuntu-toolchain-r/test
    - apt update

    # Install Java 17, Maven 3.8.6, JavaFX, g++ and xvfb.
    # wget and tar are for maven 3.8.6 installation.
    # xvfb is to run CI/CD in a virtual framebuffer server or something, so that javafx works. https://stackoverflow.com/a/58724982/14406682
    - apt install -y openjdk-17-jre openjdk-17-jdk wget tar openjfx make g++-11 xvfb
    - wget https://dlcdn.apache.org/maven/maven-3/3.8.6/binaries/apache-maven-3.8.6-bin.tar.gz
    - mkdir -p /usr/local/apache-maven
    - mv apache-maven-3.8.6-bin.tar.gz /usr/local/apache-maven
    - tar -xzvf /usr/local/apache-maven/apache-maven-3.8.6-bin.tar.gz --directory /usr/local/apache-maven

    - export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
    - export M2_HOME=/usr/local/apache-maven/apache-maven-3.8.6
    - export M2=$M2_HOME/bin
    - export MAVEN_OPTS="-Xms256m -Xmx512m"
    - export PATH=$M2:$PATH
    - export PATH_TO_FX=/usr/share/openjfx/lib
    - source ~/.profile

    # Check versions
    - update-alternatives --config java
    - mv /usr/bin/g++-11 /usr/bin/g++

    # Install
    - xvfb-run mvn clean install -B -Dstyle.color=always
    - echo "Maven execution complete."