Exmaple project for the Automating Semantig Versioning blog post.
All commands are found in the .gitlab-ci.yml file.
You can test the different commands locally by simply executing them in any shell.
You don't need maven to try out the different commands, the repository comes with maven wrapper (just execute ./mvnw instead).
The project can be taken and uploaded to Gitlab as is to test out the different pipeline jobs.