1)

compcomm-plugins
-- po
-- src
----- group (including metadata)
----- winrules
----- ...

2)

compcomm-plugins
-- po
-- group
----- src
----- metadata
-- ...

3)

compcomm-plugins
-- po
-- plugins
----- group
-------- src
-------- metadata
----- winrules
-------- src
-------- metadata

4)

compcomm-plugins
-- po
-- plugins
----- group (source + metadata)
----- winrules