how to have yum prefer one dependency over others
matyas at cs.wisc.edu
Mon Sep 19 16:05:47 UTC 2011
Matthew Garrett wrote on Mon, Sep 19, 2011 at 05:00:28PM +0100:
> On Mon, Sep 19, 2011 at 10:51:26AM -0500, Matyas Selmeci wrote:
> > Kevin Kofler wrote on Mon, Sep 19, 2011 at 01:02:26PM +0200:
> > > Michael Schroeder wrote:
> > > > Sounds like you want weak dependencies (i.e. "Suggests" et al).
> > >
> > > In this case, I think disjunctive dependencies (default | virtual), as
> > > Matthew Garrett pointed out, are the right solution, not soft dependencies
> > > (though those would also be nice).
> > >
> > > Kevin Kofler
> > Functionally speaking, what is the difference between a soft dependency
> > and a disjunctive dependency? How can you satisfy a soft dependency if
> > you don't know what virtual dependency it is being used to provide?
> If we have:
> Requires: phonon-backend
> Suggests: phonon-backend-gstreamer
> What would you expect the outcome to be on a system that has
> phonon-backend-xine? I'd have thought that phonon-backend-gstreamer
> would get installed, even if you can later remove it. That's not the
> desired outcome.
I see. So 'Suggests' means it gets automatically installed (unless it
explicitly conflicts with something already install I presume?), but
can be removed without breaking the package it was brought in for
(unless no other package provides the phonon-backend dependency).
Do I have that right?
More information about the devel