repsys is the tool used to manage RPM packages in a subversion repository.
It is used to create, tag releases, generate .src.rpm, generate changelog,
and request new package releases for build. It mostly acts as a interface
to svn(1) commands and small task scripts run that on the build system side
over ssh(1).

For more information, see repsys(8) and
http://wiki.mandriva.com/en/Development/Packaging/RepositorySystem

The discussion on the development of repsys takes place on the
"maintainers" mailing list:
http://wiki.mandriva.com/en/Development/Mailinglists