Inside depgraph.validate_blockers(), prevent false positives in PROVIDE

virtual blocker matches that can occur for packages for packages that don't
actual have the appropriate value in PROVIDE (triggered by profile 'virtuals'
settings). Thanks to Ned Ludd <solar@g.o> for reporting.

svn path=/main/trunk/; revision=13248

1 files changed, 14 insertions, 5 deletions

diff --git a/pym/_emerge/__init__.py b/pym/_emerge/__init__.py
index 0a0ab3414..4fa46dbc1 100644
--- a/pym/_emerge/__init__.py
+++ b/pym/_emerge/__init__.py
@@ -6754,10 +6754,15 @@ class depgraph(object):
 			final_db = self.mydbapi[myroot]
 			
 			provider_virtual = False
-			if blocker.cp in virtuals and \
+			if blocker.cp.startswith('virtual/') and \
 				not self._have_new_virt(blocker.root, blocker.cp):
 				provider_virtual = True
 
+			# Use this to check PROVIDE for each matched package
+			# when necessary.
+			atom_set = InternalPackageSet(
+				initial_atoms=[blocker.atom])
+
 			if provider_virtual:
 				atoms = []
 				for provider_entry in virtuals[blocker.cp]:
@@ -6768,13 +6773,17 @@ class depgraph(object):
 			else:
 				atoms = [blocker.atom]
 
-			blocked_initial = []
+			blocked_initial = set()
 			for atom in atoms:
-				blocked_initial.extend(initial_db.match_pkgs(atom))
+				for pkg in initial_db.match_pkgs(atom):
+					if atom_set.findAtomForPackage(pkg):
+						blocked_initial.add(pkg)
 
-			blocked_final = []
+			blocked_final = set()
 			for atom in atoms:
-				blocked_final.extend(final_db.match_pkgs(atom))
+				for pkg in final_db.match_pkgs(atom):
+					if atom_set.findAtomForPackage(pkg):
+						blocked_final.add(pkg)
 
 			if not blocked_initial and not blocked_final:
 				parent_pkgs = self._blocker_parents.parent_nodes(blocker)