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Date: Wed, 10 Aug 2011 23:31:12 -0500
From: Stephen Montgomery-Smith <stephen@missouri.edu>
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Subject: Re: SVN repo
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On 08/09/2011 07:49 AM, Chris Rees wrote:
> Hi Stephen,
>
> Have you any plans to start distributing the subversion repo? I keep
> hearing little hints about the Other Two Trees being moved too... If
> you need any more hands on it I'll be happy to help.
>
> Chris


OK, I think I have figured out how to do this, at least in principle.

svn has all its data organized into revisions.  These are numbered, 
starting at 1, and going on up to something like 224771.  Every time 
someone commits to the svn repository, the revision number is incremented.

There is the command:

svnadmin dump whereever-the-repository-is \
   -r 224703:224771 --incremental --deltas > afile

so that if someone else has a repository going up to revision 224702, 
then they can update to revision 224771 with the command:

svnadmin load whereever-the-other-one-is < afile.

Furthermore, afile will just contain diffs needed to go from 224702 to 
224771, and so it is not going to be larger than it needs to be.

Obviously a wrapper can be written around these commands so that afile 
is sent out be email, and ctm and mkCTM can be written so that svn 
updates can be sent out by CTM.

I'm still experimenting with this.  And I don't think I will work 
seriously on this until the FreeBSD project gets close to abandoning cvs 
altogether.  But I think that with some work, this can be made to work.

Stephen