README.md

GitLab CI template for Maven

This project implements a generic GitLab CI template for Maven.

It provides several features, usable in different modes (by configuration).

Usage

In order to include this template in your project, add the following to your gitlab-ci.yml:

include:
  - project: 'to-be-continuous/maven'
    ref: '2.1.3'
    file: '/templates/gitlab-ci-maven.yml'

Global configuration

The Maven template uses some global configuration used throughout all jobs.

Name	description	default value
MAVEN_IMAGE	The Docker image used to run Maven ⚠️ set the version required by your project	maven:latest
MAVEN_CFG_DIR	The Maven configuration directory	.m2
MAVEN_OPTS	Global Maven options	-Dhttps.protocols=TLSv1.2 -Dmaven.repo.local=${MAVEN_CFG_DIR}/repository -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true
MAVEN_CLI_OPTS	Additional Maven options used on the command line	--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true

About $MAVEN_CFG_DIR

This variable is used to define the Maven configuration directory. It is used for 2 purposes:

• in case a Maven settings file (settings.xml) is found, the template automatically uses it (using the -s option on command line),
• the cache policy declares the ${MAVEN_CFG_DIR}/repository directory as cached (not to download Maven dependencies over and over again).

If you have a good reason to do differently, you'll have to override the MAVEN_CLI_OPTS variable as well as the cache policy.

Jobs

mvn-build job

The Maven template features a job mvn-build that performs build and tests at once. This stage is performed in a single job for optimization purpose (it saves time) and also for test jobs dependency reasons (some test jobs such as SONAR analysis have a dependency on test results).

It uses the following variable:

Name	description	default value
MAVEN_BUILD_ARGS	Maven arguments for the build & test job	org.jacoco:jacoco-maven-plugin:prepare-agent verify org.jacoco:jacoco-maven-plugin:report

About Code Coverage

With its default arguments, the GitLab CI template for Maven forces the use of JaCoCo Maven Plugin to compute code coverage during unit tests execution.