Konrad Hinsen recently posted some ideas for handling namespaces
There are a lot of good ideas in there, and right now I'd like to talk specifically about the proposed :like & :clone clauses. I have a bit of a different approach.
Supposed we add a new project file, namespace_config.clj. It would be a basic rules engine for configuring namespaces. I'm thinking there would be a macro, extend-ns, that is roughly defined as follows. The exact implementation needs work.
This lets us set up a series of predicates & resulting actions that would be applied to each ns in the project. Everything would be done in one central location, so (hopefully) that would cut down on maintenance.