depgraph: prefer highest priority repo more often

Prefer the highest priority repo, even when the ebuild from the higher
priority repo requires USE adjustments due to USE deps or REQUIRED_USE.
This will fix bug #350254.

2 files changed, 17 insertions, 0 deletions

diff --git a/pym/_emerge/Package.py b/pym/_emerge/Package.py
index 0b3375edc..c80bad3ac 100644
--- a/pym/_emerge/Package.py
+++ b/pym/_emerge/Package.py
@@ -352,6 +352,13 @@ class Package(Task):
 		return self.metadata['repository']
 
 	@property
+	def repo_priority(self):
+		repo_info = self.root_config.settings.repositories.prepos.get(self.repo)
+		if repo_info is None:
+			return None
+		return repo_info.priority
+
+	@property
 	def use(self):
 		if self._use is None:
 			self.metadata._init_use()
diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index badbb506d..f62af31b8 100644
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -2877,12 +2877,22 @@ class depgraph(object):
 						# list only contains unbuilt ebuilds since USE can't
 						# be changed for built packages.
 						higher_version_rejected = False
+						repo_priority = pkg.repo_priority
 						for rejected in packages_with_invalid_use_config:
 							if rejected.cp != pkg.cp:
 								continue
 							if rejected > pkg:
 								higher_version_rejected = True
 								break
+							if portage.dep.cpvequal(rejected.cpv, pkg.cpv):
+								# If version is identical then compare
+								# repo priority (see bug #350254).
+								rej_repo_priority = rejected.repo_priority
+								if rej_repo_priority is not None and \
+									(repo_priority is None or
+									rej_repo_priority > repo_priority):
+									higher_version_rejected = True
+									break
 						if higher_version_rejected:
 							continue