Subversion backup script (multiple repos, unlimited directory depth)

[Ulf Benjaminsson]

I had Lukas Sandström develop a bashscript for me to help with backing up
all my SVN-repos. It's built on Vincent Danen's "Automate subversion
backups<http://www.builderau.com.au/program/linux/soa/Automate-subversion-backups/0,339028299,339281519,00.htm>",
but is fitted to my needs: nightly full backups, descending into subdirs &
logged output. Hopefully someone else finds this useful too. Realeased under
a BSD-license, here's what it can do for you:

 * compressed (tar.bz2) hotcopy of *every repo in the basedir and any subdir
of basedir*
 * archives are named in the format: repodirname-date-revision.tar.bz2
 * creates new copy *only if revision has changed* since last run
 * loggfile in the output directory
 * optional: do incremental backups (*untested*)

*Suggested improvements: *
Logg a timestamp when starting a repo backup (to see how long compression
etc. took)
Some clean up might be nice if you're short on space
A more robust way to identify repo root directories. (current way: look for
the file "format", though not if it's found in the dir "db/" - this is what
my repos look like <http://share.ulfben.com/svndirstruct.png>)

Happy hacking!

//Ulf Benjaminsson
www.ulfben.com
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