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Creating a subversion "tag change summary".

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I know this isn't strictly Java, but I'm using SVNKIT, which is Java :-)

Our deployment process includes building a tag in SVN, which is "mostly" 
the contents of an old tag, but with a couple of files copied from the 
trunk instead.

I'm trying to build a tool which will do two things: One, it will list 
the files that differ between trunk and the "source" tag.  This is easy 
with SVNKIT, just use the SVNDiffClient.doDiffStatus().

The second part seems to be more difficult.  I want to produce a list of 
commits that are different. Basically, I want to warn someone if are two 
or more authors committed to the file that's being deployed, and also 
give them a quick change-log.

I've written code that does this, which basically does a svn log of the 
file both in the source tag and trunk, and then which trunk revisions 
aren't already present in the tag.  The problem is that this is a really 
slow process, taking up to 30 seconds per file.

I'm using SVNKIT, I was using version 1.3.2, and recently upgraded to 
1.7.4, which is somewhat faster, but still to slow.

Our current setup only allows http(s) connections to the repository (not 
svn: or direct file access), so I'm not sure if that accounts for some 
of the speed, but I doubt thats the entire problem.  I don't have shell 
access to the SVN server, so I can't really see whats going on there 
without involving our admins.

The current revision number is r788228, so we have a lot of revisions.

Short of moving the revision history into my own DB (to cache the data), 
is there any other approach you might consider taking to solve this 
problem? Even questions/ideas I can take to our admins are fine, but 
this is kind of a side-project for me, so I wouldn't expect a lot from them.

Thanks,
Daniel.

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Thread

Creating a subversion "tag change summary". Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-04-15 14:44 -0700
  Re: Creating a subversion "tag change summary". Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-04-15 15:11 -0700
    Re: Creating a subversion "tag change summary". "John B. Matthews" <nospam@nospam.invalid> - 2012-04-16 01:51 -0400
      Re: Creating a subversion "tag change summary". Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-04-16 10:12 -0700
        Re: Creating a subversion "tag change summary". "John B. Matthews" <nospam@nospam.invalid> - 2012-04-16 20:54 -0400
          Re: Creating a subversion "tag change summary". Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-04-17 09:25 -0700
  Re: Creating a subversion "tag change summary". Steven Simpson <ss@domain.invalid> - 2012-04-16 08:10 +0100
    Re: Creating a subversion "tag change summary". Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-04-16 10:16 -0700

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