Make the eclipse plugin honour encoding options for Java/Groovy source folders

If I set the following in my build.gradle:

apply plugin: 'java'
compileJava.options.encoding = 'UTF-8'

I would expect that, when I invoke 'gradle eclipse', the generated project has the necessary project-specific settings to use the 'UTF-8' encoding on the Java source folders.
Instead, no encoding is currently set on the generated project and all the folders (including the Java source folders) have just the "Inherited from container" encoding option set.

The same applies to Groovy source sets for a project that applies the groovy plugin.

This improvement would be extremely appreciated.