Building your own rpm/apt/yum repository

[Clif Smith]

As usual, I'm probably over-complicating the issue...

Here's my dilemma.  I need to QA software against various versions of my
own company's software.  Being that the versions come out at different
times, I need to be able to build system1 with all updates as of
software version1's release and then build system2 with all updates as
of software version2's release.  While I could image/clone/ghost/etc.
systems various ways, I'd rather be able to build from scratch if needed
as I get newer hardware from time to time which makes having a constant
image a hassle.

So, I'm thinking of magical apt/yum repositories which I could call on
to do the heavy lifting.  I'm assuming apt or yum as they'll handle the
various dependencies so that everything is installed in the right order
without a lot of trial and error.

Ideas?

cjs