mock and fc5/fe5 and comps pain

[seth vidal]

Hi,
 As some of you are aware the comps changes that anaconda wanted changed
how comps works in yum which nicely BROKE Fedora Extras rawhide builds
once the comps.xml changes landed in rawhide. So what do we do to fix
it? 

 Jeremy and I tossed around a couple of ideas - none of them terribly
attractive but we settled on this, I'd like to hear some input:

  - make three packages and put them in the buildgroups repo:
    http://fedoraproject.org/buildgroups/
    The packages would have no real payload but would have only
    a requires list that matches the 3 groups listed in:
    http://fedoraproject.org/buildgroups/4/i386/buildroots.xml

  - modify mock to act on those packages instead of on group names.
Possibly 
    making that act be something you configure so we don't break
everyone with 
    the mock update.
  
  - no longer have to worry about groups-file-format-changes screwing up
mock and 
    extras builds

So what do y'all think? That sound like a plan?
Would someone like to make the packages for us while I go futz with
mock?

thanks,
-sv