zk already have osgi binary version. so anyone can build a p2 from this distribute.
but source code is hasn't osgi metadata.
so hard to create p2 repository with source.
i think it's worth to add osgi metadata to source bundle

just a MANIFEST.MF with below content

Bundle-SymbolicName: zcommon.source
Bundle-Version: 8.0.1.1
Eclipse-SourceBundle: zcommon;version="8.0.1.1";roots:="."