[Maven-plugins-developer] Adding plugin:help info - how?

[Holger H. <hol...@go...>]

Hi,

I noticed that some plugins give meaningful information when the
plugin:help goal is invoked. I've been looking to add this information to
an existing plugin, but cannot for the life of me figure out how. I've
looked at the sources of the eclipse and versions plugins, and simply
cannot find how the help texts are provided.
Can someone please point me in the right way?

thanks.
Holger