The old naive check fails if an argument starts with '-B'. Now we use a
regular expression, which should correctly match if batch mode was
already supplied, and add it if not.
Disable download logs in Maven by default
This commit adds a flag to Maven by default, which disables the messages
like "Downloading from central".
The logger is set to level "warn", so errors will still be visible, but
successful messages won't clutter logs anymore.
This option is also set by default in the GitLab CI template file for
maven.
See [1] for reference on the option.
1: https://stackoverflow.com/a/35653426/8843830
* Make commit of new version optional in `artifactSetVersion` step
You might not want to add a new commit for each version, when versions
are automatically created. This commit makes this feature optional, but
enabled by default to maintain API compatibility.
* Set `gitCommitId` if null
* Improve documentation of `commitVersion` parameter
* Allow to operate in a code checkout without `.git` directory
Florian WilhelmandGitHub
