Simple way to update kickstart RPM files?

[Jake Vickers]

  On 10/01/2010 01:50 AM, whitivery wrote:
> I have a kickstart server with the files copied from the CentOS
> 5.5 DVD's "CentOS" directory to a "CentOS" directory on the
> server, accessed by ftp during kickstart.
>
> On a target built by this system, I did a yum update, and over
> 100 packages were updated.
>
> I would like to merge the updates back to the kickstart server.
>
> But I don't see a simple way to just throw the *.rpm files (as
> grabbed from yum's cache) into some "updates" directory and the
> kickstart will do the right thing and resolve dependencies and
> install the latest.
>
> I would rather the updates just get installed in the first place,
> instead of having to take a second pass to do some kind of yum
> update method.
>
> Is there an elegant way?

I usually do an install into a VM from my ISO, enable the yum cache, and 
then perform an update. Once that is complete, I gzip the updates and 
get them back onto my build machine. This process is a little tedious, 
but you copy the updates into the package folder for your ISO build and 
then delete the old versions that are in there. Then just run:
rm -rf /ISO-Build-Dir/.olddata
discinfo=`head -1 /ISO-Build-Dir/.discinfo`
createrepo -u “media://$discinfo” -g repodata/comps.xml /ISO-Build-Dir