Re: pairwise dependency script anyone?

[Jeff Johnson <n3npq jbj gmail com>]

On May 1, 2006, at 9:36 PM, Christian Goetze wrote:

> Does anyone have a script which queries an existing rpm db and  
> spits out the dependencies expressed as dependencies between rpms?
>
> This would require matching up the --provides and --requires of all  
> rpms, using the proper version matching used by rpm - so it's a  
> little more complex than a naive perl script.

You essentially want a computation of what I call the "contains"  
relationship, which package "contains"
the Provides: that satisfies a given Requires:. The basic primitive  
is a --whatprovides query, better can be done
with the RPMTAG_PROVIDENAME through, say, a python match iterator.

> My ultimate goal is: given a set of rpms, list me the minimal set  
> of rpms required to satisfy the dependencies of the given rpms.

Hint: Multiple packages that satisfy a given Provide: need to be  
figured for "minimal set" and that
needs additional information, like affinities that group containing  
packages.

Good luck!

73 de Jeff