On Fri, 21 Jul 2017, Matthew Miller wrote:

On Fri, Jul 21, 2017 at 04:19:20PM +0100, Phil Perry wrote:

...

Say a package has a dependency for libfoo.so.1, and 2 (or more) packages provide libfoo.so.1, how does yum decide which package to install to meet the dependency?

It has a series of heuristics:

http://yum.baseurl.org/wiki/CompareProviders

That's fabulous. You mean Phil could have fixed my issue by renaming the package priiiiiimus so that the name was longer than mesa-libGL ;)

jh

On 21/07/17 17:10, Matthew Miller wrote:

On Fri, Jul 21, 2017 at 05:00:35PM +0100, John Hodrien wrote:

...

...

...

Say a package has a dependency for libfoo.so.1, and 2 (or more) packages provide libfoo.so.1, how does yum decide which package to install to meet the dependency?

It has a series of heuristics: http://yum.baseurl.org/wiki/CompareProviders

Many thanks Matthew, that's a great overview.

...

That's fabulous. You mean Phil could have fixed my issue by renaming the package priiiiiimus so that the name was longer than mesa-libGL ;)

Tragically possible. :)

In this case, working through the logic, it would appear that primus probably won the battle on the basis of pulling in fewer deps than mesa-libGL, but what else is already installed on the system would clearly have an effect here.

Still, nice to know the logic involved.