SVNChecker is a framework for Subversion pre-commit hooks in order to 
implement checks of the to be commited files before they are commited. 
For example, you can check for the code style or unit tests. The output 
of the checks can be send by mail or be written into a file or simply 
print to the console.

See http://svnchecker.tigris.org

replacer https://github.com/DLR-SC/RepoGuard