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Nice one – dump part of SVN repo

January 26th, 2011 Leave a comment Go to comments

Today at work at Fronde I needed to create a dump of a ‘project’ inside a repository. Our SVN setup is to have one repo per team and then within there have a folder for each client/project. In this case I was providing the backup to a client so it was vital that I gave them just their code and not the whole repo.
So my SVN repo was like this:

To dump the clientA history into a portable, re-creatable format, I used svnadmin dump, like this:
svnadmin dump [path to repo] > repo.dump

Which creates a dump of the entire repository into a file called repo.dump. This took about 10 mins with 1000 versions and used 100% CPU so it would be best to perform this outside of normal work hours. You have been warned!
I then used svndumpfilter (tutorial) to filter just for the ClientA folder (see folder tree above):
svndumpfilter include clientA < repo.dump > clientA.dump

If you have nested repositories, then it breaks with a syntax error. To get around this you need to run the dump multiple times using the ‘exclude’ directive until you have what you want:
svndumpfilter exclude clientB < repo.dump >> clientA.dump
svndumpfilter exclude clientC < repo.dump >> clientA.dump

This didn’t take very long and at the end I had a full svn repository that could be re-created anywhere. To prove the point I installed SVN on my mac and created the repository. I then loaded the dump file into it and it worked beautifully
svnadmin create /Users/Dave/ClientA
svnadmin load /Users/Dave/ClientA < ClientA.bak
mkdir /Users/Dave/ClientA-checkout
svn co file:///Users/Dave/ClientA clientA-checkout/

Now that you have checked it, you can delete the whole repo backup file (mine was massive) Repo.svn-dump in my case.
Easy as pie once you know how. The fact that you can’t specify the filter at dump-time is non-intutative, clunky and frankly a waste of space. However if you only need to do it once it works and produces a very nice result. Open Source and Open Standards FTW

Taken from: http://daveharris.wordpress.com/2008/08/05/svn-dump-parts-of-a-repository/

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