CI experiments

.gitlab-ci.yml

 image: maven:3-jdk-8
 
-
-variables:
-  # This will supress any download for dependencies and plugins or upload messages which would clutter the console log.
-  # `showDateTime` will show the passed time in milliseconds. You need to specify `--batch-mode` to make this work.
-  MAVEN_OPTS: "-Dmaven.repo.local=.m2/repository -Dorg.slf4j.simpleLogger.log.org.apache.maven.cli.transfer.Slf4jMavenTransferListener=WARN -Dorg.slf4j.simpleLogger.showDateTime=true -Djava.awt.headless=true"
-  # As of Maven 3.3.0 instead of this you may define these options in `.mvn/maven.config` so the same config is used
-  # when running from the command line.
-  # `installAtEnd` and `deployAtEnd` are only effective with recent version of the corresponding plugins.
-  MAVEN_CLI_OPTS: "--batch-mode --errors --fail-at-end --show-version -DinstallAtEnd=true -DdeployAtEnd=true"
-
 # Cache downloaded dependencies and plugins between builds.
-# To keep cache across branches add 'key: "$CI_JOB_REF_NAME"'
 cache:
   paths:
     - .m2/repository
 
 build:
-  script: mvn $MAVEN_CLI_OPTS clean verify
+  script: mvn -Dmaven.repo.local=.m2/repository --show-version clean verify