Would branching across repositories be theoretically possible?

Hello,

I'm playing around with LLVM sources and would like to make local tweaks
while keeping track with ongoing development in the trunk. I tried
issuing the command:

  svn copy http://llvm.org/svn/llvm-project/llvm/trunk
svn+ssh://username@myserver.net/usr/data/llvm-local

to which SVN responds:

  svn: E200007: Source and destination URLs appear not to point to the
same repository.

My question is this: Is there a compelling technical reason why
branching must occur within the same repository? I'm tempted to try my
hand in adding cross-repository branching to SVN, but would like to make
sure first that this is not impossible. For example, I have read-only
access to the LLVM repository (like most mere mortals), so if branching
requires that some metadata be written there, then this would be a
no-go.

Many thanks,

--Zem
Received on 2012-12-31 14:07:27 CET