[Kotlin] Support description extraction for Kotlin Mojos

[DreierF]

The Maven Tools plugin used to extract the description entries for the plugin.xml only supports Java Code at the moment.

It would be great if this information could also be extracted from Kotlin files. The original maven-plugin-plugin allows to add third-party extractors such as kotlin-maven-plugin-tools for this purpose. Maybe this can be done similarly for this Gradle plugin or you could replace it entirely with this library as it claims to also support extracting the data from Java files.

[britter]

I'm not sure I fully understand the issue. Are you asking for a way to specify and register additional extractors? That shouldn't be too difficult actually.

[DreierF]

In the abstract I'm asking for a way to keep the description nodes in the plugin.xml, when implementing a Maven Plugin in Kotlin instead of Java.

Exposing a way to add a custom extractor or baking support for this directly into the plugin would just be two ideas on how to achieve this. You can judge better which approach makes more sense from the viewpoint of the project.