commit:     390f90c2bee92ee5c845cdd765824b48ed6718ad
Author:     Zac Medico <zmedico <AT> gentoo <DOT> org>
AuthorDate: Sun Nov 16 04:32:43 2014 +0000
Commit:     Zac Medico <zmedico <AT> gentoo <DOT> org>
CommitDate: Sun Nov 16 08:58:53 2014 +0000
URL:        
http://sources.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=390f90c2

_slot_operator_update_probe: fix bug #528610

This fixes a case inside _slot_operator_update_probe where it would
select an inappropriate replacement_parent of a lower version than
desired. The problem is solved by rejecting replacement_parent if its
version is lower than the existing parent, and a downgrade is not
desired.

X-Gentoo-Bug: 528610
X-Gentoo-Bug-URL: https://bugs.gentoo.org/show_bug.cgi?id=528610
Acked-by: Brian Dolbec <dolsen <AT> gentoo.org>

---
 pym/_emerge/depgraph.py                            |  8 +++
 ..._slot_operator_update_probe_parent_downgrade.py | 68 ++++++++++++++++++++++
 2 files changed, 76 insertions(+)

diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index 94eaed8..2a839d0 100644
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -1659,6 +1659,7 @@ class depgraph(object):
                debug = "--debug" in self._frozen_config.myopts
                selective = "selective" in self._dynamic_config.myparams
                want_downgrade = None
+               want_downgrade_parent = None
 
                def check_reverse_dependencies(existing_pkg, candidate_pkg,
                        replacement_parent=None):
@@ -1706,6 +1707,13 @@ class depgraph(object):
                for replacement_parent in 
self._iter_similar_available(dep.parent,
                        dep.parent.slot_atom, 
autounmask_level=autounmask_level):
 
+                       if replacement_parent < dep.parent:
+                               if want_downgrade_parent is None:
+                                       want_downgrade_parent = 
self._downgrade_probe(
+                                               dep.parent)
+                               if not want_downgrade_parent:
+                                       continue
+
                        if not check_reverse_dependencies(dep.parent, 
replacement_parent):
                                continue
 

diff --git 
a/pym/portage/tests/resolver/test_slot_operator_update_probe_parent_downgrade.py
 
b/pym/portage/tests/resolver/test_slot_operator_update_probe_parent_downgrade.py
new file mode 100644
index 0000000..2ec15b6
--- /dev/null
+++ 
b/pym/portage/tests/resolver/test_slot_operator_update_probe_parent_downgrade.py
@@ -0,0 +1,68 @@
+# Copyright 2014 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+from portage.tests import TestCase
+from portage.tests.resolver.ResolverPlayground import \
+       ResolverPlayground, ResolverPlaygroundTestCase
+
+class SlotOperatorUpdateProbeParentDowngradeTestCase(TestCase):
+
+       def testSlotOperatorUpdateProbeParentDowngrade(self):
+
+               ebuilds = {
+                       "net-nds/openldap-2.4.40-r3": {
+                               "EAPI": "5",
+                               "RDEPEND": "<sys-libs/db-6.0:= " + \
+                                       "|| ( sys-libs/db:5.3 sys-libs/db:5.1 )"
+                       },
+                       "net-nds/openldap-2.4.40": {
+                               "EAPI": "5",
+                               "RDEPEND": "sys-libs/db"
+                       },
+                       "sys-libs/db-6.0": {
+                               "SLOT": "6.0",
+                       },
+                       "sys-libs/db-5.3": {
+                               "SLOT": "5.3",
+                       },
+               }
+
+               installed = {
+                       "net-nds/openldap-2.4.40-r3": {
+                               "EAPI": "5",
+                               "RDEPEND": "<sys-libs/db-6.0:5.3/5.3= " + \
+                                       "|| ( sys-libs/db:5.3 sys-libs/db:5.1 )"
+                       },
+                       "sys-libs/db-6.0": {
+                               "SLOT": "6.0",
+                       },
+                       "sys-libs/db-5.3": {
+                               "SLOT": "5.3",
+                       },
+               }
+
+               world = (
+                       "net-nds/openldap",
+               )
+
+               test_cases = (
+                       # bug 528610 - openldap rebuild was triggered
+                       # inappropriately, due to slot_operator_update_probe
+                       # selecting an inappropriate replacement parent of
+                       # a lower version than desired.
+                       ResolverPlaygroundTestCase(
+                               ["@world"],
+                               success = True,
+                               options = { "--update": True, "--deep": True },
+                               mergelist = []),
+               )
+
+               playground = ResolverPlayground(ebuilds=ebuilds,
+                       installed=installed, 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()

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