commit ae2d51ba77db4a4855912d9c33565ef2f4203803

Author: Michal Domonkos <mdomonko@redhat.com>

Date:   Wed Jun 20 17:43:44 2018 +0200

    depsolve: filter out conflicting provider. BZ 1480065

    When there are multiple providers available for a requirement, yum would

    happily pick the one that the requiring package also has a "Conflicts:"

    on (via another virtual provide), failing to resolve the transaction.

    Example:

    - foo requires bar and conflicts my-bar

    - bax provides bar

    - bay provides bar, my-bar

    Yum might decide to pick bay, only to fail due to the conflict with foo

    later in the process.

    This commit fixes that by dropping such a provider from the candidate

    list when depsolving.

diff --git a/yum/depsolve.py b/yum/depsolve.py

index 3453456c..26369b7b 100644

--- a/yum/depsolve.py

+++ b/yum/depsolve.py

@@ -1556,6 +1556,13 @@ class Depsolve(object):

                 continue

             unique_nevra_pkgs[pkg.pkgtup] = pkg

         pkgs = unique_nevra_pkgs.values()

+

+        # Do a conflict filtering; get rid of those pkgs that reqpo conflicts

+        # with

+        if reqpo is not None:

+            pkgs = [pkg for pkg in pkgs

+                        if not any(pkg.checkPrco('provides', conflict)

+                                   for conflict in reqpo.conflicts)]

         pkgresults = {}