liferay/liferay-maven-support — comment on commit 189e0a405fdb336780fad429a2b4f771bdbe6c48
File:  line 0
By mikakoivisto:

Those are left intentionally without any default value so that someone using the plugin can define value for all the parameter or just set one of the baseDir parameters. I'll add a check if it's not configured properly it'll throw a meaningful error.