[darcs-users] multiple libraries question

[zooko at zooko.com]

> I have project P.  It uses a library L.  I want to maintain the source for L
> separately from P, since L is shared by other projects.
> 
> I suppose the simple approach is that I need to fetch L and then fetch P if
> I want to build the latest P.
> 
> Is there a better way?  Namely, a way that fetching P would automatically
> update L?

I have a directory for the project: $P, and then a subdirectory named "libs",
and then "libs/$L".  The way I set this up is to go into your L repository and
"darcs mv" everything in it into a subdirectory named "$L".

Then go into P and pull all the patches from L into P.  Everything will be in a
subdirectory named $P/$L.  Now mkdir libs, darcs add libs, darcs mv $L libs.

There is one potential problem: if at some point in the past, there existed a
file in the L repository named "./$F", for any filename F, and there also
existed a file in the P repository named "./$F", then pulling the two repos
together will cause a merge conflict and possibly a lock-up, even though L's F
*now* lives in "./$L/$F".

That is why for *all* darcs repositories that I ever create (and that is a
lot), I never "darcs add" any file in the root directory.

Regards,

Zooko