In need of CVS/SVN checkout script for Production servers

Semi-off-topic, but I'm pretty sure you all are faced with this same challenge, I figured it's worth a shot and maybe some flaming. I'm looking for a script (bash or php) that I would run on my production web server that would do this or close to it: 1. do a CVS/SVN checkout to a new timestamped directory 2. change the symlink from the old directory 3. change permissions to www-data:www-data on new directory 4. and possibly tarball up the old directory. I'm assuming this is a fairly common task, and I actually wrote one of these at my previous job, but I can't find the script anymore. I remember it's not quite as trivial as it sounds and took a few hours to perfect, so I thought I'd try to save myself some time. :) I have some other useful SVN scripts here if anyone is interested: http://daevid.com/content/examples/snippets.php