From ef125a7885f4f5a614265f3f8a97803f6a8c1264 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Mon, 4 Mar 2013 16:56:28 -0800
Subject: [PATCH] Fix bug #460304.

---
 pym/_emerge/depgraph.py                     | 26 +++++++++++++++++++
 pym/portage/tests/resolver/test_slot_abi.py | 28 ++++++++++++++++++++-
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index dddada072..90332851a 100644
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -1189,6 +1189,8 @@ class depgraph(object):
 		for replacement_parent in self._iter_similar_available(dep.parent,
 			dep.parent.slot_atom):
 
+			selected_atoms = None
+
 			for atom in replacement_parent.validated_atoms:
 				if not atom.slot_operator == "=" or \
 					atom.blocker or \
@@ -1198,6 +1200,7 @@ class depgraph(object):
 				# Discard USE deps, we're only searching for an approximate
 				# pattern, and dealing with USE states is too complex for
 				# this purpose.
+				unevaluated_atom = atom.unevaluated_atom
 				atom = atom.without_use
 
 				if replacement_parent.built and \
@@ -1247,6 +1250,17 @@ class depgraph(object):
 						# slot conflict).
 						insignificant = True
 
+					if not insignificant:
+						# Evaluate USE conditionals and || deps, in order
+						# to see if this atom is really desirable, since
+						# otherwise we may trigger an undesirable rebuild
+						# as in bug #460304.
+						if selected_atoms is None:
+							selected_atoms = self._select_atoms_probe(
+								dep.child.root, replacement_parent)
+						if unevaluated_atom not in selected_atoms:
+							continue
+
 					if debug:
 						msg = []
 						msg.append("")
@@ -1393,6 +1407,18 @@ class depgraph(object):
 
 		return available_pkg is not None
 
+	def _select_atoms_probe(self, root, pkg):
+		selected_atoms = []
+		use = self._pkg_use_enabled(pkg)
+		for k in pkg._dep_keys:
+			v = pkg._metadata.get(k)
+			if not v:
+				continue
+			selected_atoms.extend(self._select_atoms(
+				root, v, myuse=use, parent=pkg)[pkg])
+		return frozenset(x.unevaluated_atom for
+			x in selected_atoms)
+
 	def _iter_similar_available(self, graph_pkg, atom):
 		"""
 		Given a package that's in the graph, do a rough check to
diff --git a/pym/portage/tests/resolver/test_slot_abi.py b/pym/portage/tests/resolver/test_slot_abi.py
index ca3662d6d..7263504b8 100644
--- a/pym/portage/tests/resolver/test_slot_abi.py
+++ b/pym/portage/tests/resolver/test_slot_abi.py
@@ -290,7 +290,33 @@ class SlotAbiTestCase(TestCase):
 				["@world"],
 				options = {"--update": True, "--deep": True},
 				success = True,
-				mergelist = ["net-misc/networkmanager-0.9.6.4-r1"]),
+				mergelist = []),
+
+		)
+
+		playground = ResolverPlayground(ebuilds=ebuilds,
+			installed=installed, user_config=user_config, world=world,
+			debug=False)
+		try:
+			for test_case in test_cases:
+				playground.run_TestCase(test_case)
+				self.assertEqual(test_case.test_success, True, test_case.fail_msg)
+		finally:
+			playground.cleanup()
+
+		user_config = {
+			"make.conf" : ("USE=\"-wimax\"",)
+		}
+
+		test_cases = (
+
+			# Demonstrate bug #460304 again, but with inverted USE
+			# settings this time.
+			ResolverPlaygroundTestCase(
+				["@world"],
+				options = {"--update": True, "--deep": True},
+				success = True,
+				mergelist = ['dev-libs/libnl-3.2.14', 'net-misc/networkmanager-0.9.6.4-r1']),
 
 		)
 
-- 
2.26.2