Anyone know of a tool that will "prune" old rpms from a directory?  What I'm
referring to is something that will cruise through the /usr/src/redhat/RPMS and
/usr/src/redhat/SRPMS and remove all but the newest files.

After build rpms, you end up with things like:

kernel-2.4.7-10.i686.rpm
kernel-2.4.7-19.i686.rpm
kernel-2.4.9-21.i686.rpm
kernel-2.4.9-31.i686.rpm
kernel-2.4.18-22.i686.rpm

Ditto in the SRPMS directory.

So something that would remove all but the kernel-2.4.18-22.i686.rpm would be
nice.