Alternate package implementation (how can I provide and conflict with the same package?)

[Valery Reznic]

--- On Wed, 6/15/11, Gene Hightower <gene at digilicious.com> wrote:

> From: Gene Hightower <gene at digilicious.com>
> Subject: Alternate package implementation (how can I provide and conflict with the same package?)
> To: rpm-list at lists.rpm.org
> Date: Wednesday, June 15, 2011, 5:45 AM
> I would like to put an alternate
> implementation of a package into my
> repository and be able to switch it in and out of use.
> 
> Lets say there is a standard package "foo" and I want to
> swap it out for
> my own package "myfoo", but be able to swap back the
> original package
> with ease.
> 
> If I say my package both provides "foo" and obsoletes "foo"
> I can
> switch from "foo" to "myfoo" just fine.  My new
> "myfoo" package can be
> installed replacing "foo".  But switching back is not
> as easy as
> installing "foo" since "foo" is now obsolete.
> 
> I would like to have each package obsolete the other when
> it is
> installed.
> 
> I have control over "myfoo" since I build it myself, but
> the "foo"
> package is provided by another.
Even if you not build this package you can easily manipulate it's metadata (add conflict/obsolete/whatever else you like) using rpmrebuild - http://rpmrebuild.sf.net

Valery.

> 
> I want to replace one package with the other, but be able
> to switch
> back with ease.
> 
> The alternatives (UPDATE-ALTERNATIVES(8)) system seems like
> a
> nightmare of symlinks.  Not exactly what I'm after.
> 
> Playing tricks with version numbers seemed like a bad idea
> also.
> 
> I'm told this can be done with aptitude on Debian.
> 
> How would I do it with RPM / Yum?
> 
> 
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> 
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