how to have yum prefer one dependency over others
skvidal at fedoraproject.org
Fri Sep 16 16:36:34 UTC 2011
On Fri, 2011-09-16 at 11:33 -0500, Matyas Selmeci wrote:
> Hi all,
> Hope it's okay to ask for general RPM/Yum advice here.
> We have several packages that require grid CA certificates to be
> installed. There are multiple sets of grid certificates, and we want to
> leave up to individual sites which set to install. We also want to give
> the sites the option to install none of them if they know what they are
> doing and want to manage certificates by themselves.
> So what we do is we add to each package that requires grid certificates
> a 'Requires: grid-certificates' line, and to each package that provides
> grid certificates a 'Provides: grid-certificates' line. We also create a
> dummy package, called 'no-ca-certs' that does nothing but provide the
> grid-certificates dependency.
> We want to set it up so that one of these certs packages is preferred
> over the others, so that if the user doesn't explicitly choose which one
> to install, then that package is installed by default. How can we do
> that? We tried having the packages provide different versions of the
> grid-certificates virtual dependency (i.e. no-ca-certs would have
> 'Provides: grid-certificates = 1', osg-ca-certs (which we prefer) would
> have 'Provides: grid-certificates = 2') in hopes that yum would pick the
> one with the highest version, but it didn't help. Any ideas?
Here is how yum does comparison between multiple package providing the
if you follow that as your guide you can probably make one of them be
the default choice.
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