base: Add obsoleters of only latest versions

Resolves situations where a package is in older version obsoleted, but
there is newer (not obsoleted) version available.
This patch covers installation of group packages and arch specific
packages. The rest is in hawkey library.

Relevant bugs:
https://bugzilla.redhat.com/show_bug.cgi?id=2183279
https://bugzilla.redhat.com/show_bug.cgi?id=2176263

dnf/base.py

@@ -1690,7 +1690,16 @@ def trans_install(query, remove_query, comps_pkg, strict):
  sltr.set(provides="({} if {})".format(comps_pkg.name, comps_pkg.requires))
  else:
  if self.conf.obsoletes:
- query = query.union(self.sack.query().filterm(obsoletes=query))
+ # If there is no installed package in the pkgs_list, add only
+ # obsoleters of the latest versions. Otherwise behave
+ # consistently with upgrade and add all obsoleters.
+ # See https://bugzilla.redhat.com/show_bug.cgi?id=2176263
+ # for details of the problem.
+ if query.installed():
+ query = query.union(self.sack.query().filterm(obsoletes=query))
+ else:
+ query = query.union(self.sack.query().filterm(
+ obsoletes=query.filter(latest_per_arch_by_priority=True)))
  sltr.set(pkg=query)
  self._goal.install(select=sltr, optional=not strict)
  return remove_query
@@ -1927,7 +1936,11 @@ def _install_multiarch(self, query, reponame=None, strict=True):
  sltr = dnf.selector.Selector(self.sack)
  q = self.sack.query().filterm(pkg=packages)
  if self.conf.obsoletes:
- q = q.union(self.sack.query().filterm(obsoletes=q))
+ # use only obsoletes of the latest versions
+ # See https://bugzilla.redhat.com/show_bug.cgi?id=2176263
+ # for details of the problem.
+ q = q.union(self.sack.query().filterm(
+ obsoletes=q.filter(latest_per_arch_by_priority=True)))
  sltr = sltr.set(pkg=q)
  if reponame is not None:
  sltr = sltr.set(reponame=reponame)