Remap jar task overwrites any copy functionality provided by/to Gradle

[ghost]

The RemapJarTask executes two actions:

1. Jar#copy method which copies the whole jar including any user defined copy specs.
2. RemapJarTask#doTask method which copies and transforms the input jar and overwrites the previous actions' output.

This prevents the use of user defined copy specs, for example:

remapJar {
  from('LICENSE')
}

Potential Solutions

1. Don't implement Jar and copy desirable properties from it and parent classes e.g. archive classifiers.
2. Ideally the task would be converted to a CopySpec however binary transformations are currently not possible however it seems they were intended to be. (blocked by) https://github.com/gradle/gradle/issues/4010

If anyone can think of any better fixes feel free to comment.

[Juuxel]

IMO it should be done like @Chocohead's RemappingJar does it (iirc): remap the output from this jar task with a custom task action. The input property would be replaced by Gradle's own methods for zips.

[modmuss50]

Im not too sure this is easily fixable, I rewrote the jar remapping in 0.11 and had a quick go at using this as an input without much success. If anyone has any ideas please let me know.