[darcs-users] Merging multi-project repos: Can it be done?

[Tom Moertel]

Hi!

When I first started using Darcs, I put all my work files into the root 
of the my repos:

     /path/to/ProjectA/
         _darcs/
         Makefile
         other
         files
         here

I have noticed that more experienced users often use this layout:

     /path/to/repo/
         _darcs/
         ProjectX/
             Makefile
             other
             files
             here

My hunch is that the second layout is preferred because it avoids 
conflicts in the event that two separate projects having a similar 
internal structure are pushed to the same remote repo.  Each project's 
files are partitioned off by its enclosing project directory.

For example, if I had a ProjectB with this layout:

     /path/to/ProjectB/
         _darcs/
         Makefile

and I pushed it to a remote repo that also had ProjectA on it, I would 
expect to get conflicts regarding the Makefile.  However, if I also had 
a ProjectY with this layout:

     /path/to/repo2/
         _darcs/
         ProjectY/
             Makefile

I *could* push both it and ProjectX to the same remote repo without 
problems.  Is that right?

Okay, now on to my real questions:

1.  Is there any way to reliably convert repos having the first layout 
into the second layout?

While I could use "darcs mv", I do not think that this would prevent 
conflicts in the case that projects having similar internal structures 
were pushed to the same remote repo.  Earlier patches would still likely 
conflict because they use the pre-mv file locations, right?

(I was thinking about using a Perl script to rewrite the file locations 
in the patches.  Would this work?)

2.  Assuming that I had pushed both ProjectX and ProjectY to a remote 
repo, is there any way to "get" just one of the projects?  For example, 
could I get ProjectX from the shared-project repo without also getting 
ProjectY?

Thanks for your help!

Cheers,
Tom