From a39124fb6af38c7bd00f09556490fe8f15e8f84c Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Fri, 6 Jul 2007 23:07:01 +0000
Subject: When depgraph updates preferences for old-style virtuals, also update
 them in the global config so that they are consistent everywhere.  Optimize
 config.setinst() to minimize the work done. (trunk r7185)

svn path=/main/branches/2.1.2/; revision=7186
---
 bin/emerge     |  7 ++++++-
 pym/portage.py | 21 ++++++++++++++-------
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/bin/emerge b/bin/emerge
index 011b0469a..9f1c34472 100755
--- a/bin/emerge
+++ b/bin/emerge
@@ -1745,9 +1745,14 @@ class depgraph:
 			if p_status == "merge":
 				# Update old-style virtuals if this package provides any.
 				# These are needed for dep_virtual calls inside dep_check.
-				p_db = self.trees[p_root][self.pkg_tree_map[p_type]].dbapi
+				p_db = self.mydbapi[p_root] # contains cached metadata
 				try:
 					self.pkgsettings[p_root].setinst(p_key, p_db)
+					# For consistency, also update the global virtuals.
+					settings = self.roots[p_root].settings
+					settings.unlock()
+					settings.setinst(p_key, p_db)
+					settings.lock()
 				except portage_exception.InvalidDependString, e:
 					provide = p_db.aux_get(p_key, ["PROVIDE"])[0]
 					show_invalid_depstring_notice(myparent, provide, str(e))
diff --git a/pym/portage.py b/pym/portage.py
index f651ddc59..ec36ede34 100644
--- a/pym/portage.py
+++ b/pym/portage.py
@@ -1813,22 +1813,29 @@ class config:
 			self.getvirtuals()
 		# Grab the virtuals this package provides and add them into the tree virtuals.
 		provides = mydbapi.aux_get(mycpv, ["PROVIDE"])[0]
+		if not provides:
+			return
 		if isinstance(mydbapi, portdbapi):
+			self.setcpv(mycpv, mydb=mydbapi)
 			myuse = self["USE"]
 		else:
 			myuse = mydbapi.aux_get(mycpv, ["USE"])[0]
 		virts = flatten(portage_dep.use_reduce(portage_dep.paren_reduce(provides), uselist=myuse.split()))
 
+		modified = False
 		cp = dep_getkey(mycpv)
 		for virt in virts:
 			virt = dep_getkey(virt)
-			if not self.treeVirtuals.has_key(virt):
-				self.treeVirtuals[virt] = []
-			# XXX: Is this bad? -- It's a permanent modification
-			if cp not in self.treeVirtuals[virt]:
-				self.treeVirtuals[virt].append(cp)
-
-		self.virtuals = self.__getvirtuals_compile()
+			providers = self.treeVirtuals.get(virt)
+			if providers is None:
+				providers = []
+				self.treeVirtuals[virt] = providers
+			if cp not in providers:
+				providers.append(cp)
+				modified = True
+
+		if modified:
+			self.virtuals = self.__getvirtuals_compile()
 
 
 	def regenerate(self,useonly=0,use_cache=1):
-- 
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