Ideally, we would like to add a task for downloading all the source jars for the first level and transitive dependencies of our project. Is there a way to do that?
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Piohen's comment above should be it's own answer (since it was the only solution that worked for me)
And to get this into the Gradle Eclipse plugin (so you don't need to do it manually every time):
Why is Eclipse not attaching 3rd party libs source files to a WTP-faceted Gradle project?