How to install a bunch of RPMS if some are already installed?

[Alan Hagge <ahagge wbfa com>]

Hi all,

Hopefully this is easy and I've just overlooked something, but I've
checked man pages, mailing lists, FAQs, etc. to no avail.  Here's what I
want to do:

I have a directory with a collection of RPMS in it.  I need to install
ALL of these RPMS on my machine.  The caveat is that SOME are already
installed.  So the behavior I'm looking for is:

- If a package isn't installed, install it.
- If a package is installed, but is older, upgrade it.
- If a package is installed and the same version as the one in the
directory, do nothing.

What rpm command can give this behavior?  rpm -i or -U will complain
that some packages are already installed and refuse to install the
others.  rpm -F won't install/upgrade anything that's not already
installed.  And I can't find an option to tell -i or -U to continue even
if some packages are already installed.

Any hints, suggestions, workarounds, etc. GREATLY appreciated.

Thanks in advance,

Alan Hagge