I have a pre-commit hook that stores its configuration inside your repository. You'll need access to the Subversion server to set it up, but once it's setup, you can control access by checking out the control file from the repository, making your changes, and then checking it back in.
This is a modification of a hook that I've been using for years. Originally, the control file was kept on the server -- usually inside the hooks directory. However, that meant logging onto the server, and that was getting too difficult to do all the time. Besides, this way, I can track who changed the control file and why. What prevents anyone from changing the control file? The control file is configured, so only the administrators can modify it. You can take a look at it at https://github.com/qazwart/SVN-Precommit-Kitchen-Sink-Hook. (Yes, a Subversion hook is stored in GitHub). If you need any further help, contact me at da...@weintraub.name, and I'll see what I can do. -- David Weintraub qazw...@gmail.com