Repo-Types - Awesome !

Hi, I was looking for a way to add the repository location to .cabal files. I found the existing implementation. However it's very likely that this new feature is missed. So what about showing a note when runinng sdist or such? Eg Note: You haven't specified a repository location. You should specify a repository location so that others can check latest changes before writing a patch. Duplicating efforts can be avoided. Try ./setup --repo-help to print some examples which you can copy into your cabal file. I really appreciate this new repository location feature! Thank you for adding it! Marc Weber