When doing a "mvn compile" the karaf-maven-plugin causes a IOException

If a user is building a project using the "karaf-maven-plugin" and is simply running "mvn compile" the "features-generate-descriptor" fails with an IOException as in "getManifest" the code is expecting the dependency to be a jar-file which is a directory in this case. 

I see two solutions for this issue:

a) Shift the execution of the plugin to a phase in which the jar is known to exist (I shifted it to the package phase)

b) (preffered) Make the getManifest method to check if it's a directory or a jar and to use a directory scanner instead of a jar scanner if it's a directory.

I could probably whip up a patch quite easily, if this is not been addressed yet ... Not being able to do a mvn compile in a project using this plugin is quite a drawback and it took me quite some time to find out what was going on with the build at the user that was reporting this.