From 1f3d3626d0fb716f1566b0cafab738a8008d3881 Mon Sep 17 00:00:00 2001
From: Zac Medico <zmedico@gentoo.org>
Date: Tue, 27 Mar 2012 18:49:59 -0700
Subject: [PATCH] varexpand: don't cache results

Caching wasn't really necessary here, and it didn't properly account
for input differences in the 'mydict' parameter.
---
 pym/portage/util/__init__.py | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/pym/portage/util/__init__.py b/pym/portage/util/__init__.py
index dd692a13a..fc4b75b20 100644
--- a/pym/portage/util/__init__.py
+++ b/pym/portage/util/__init__.py
@@ -645,15 +645,10 @@ def getconfig(mycfg, tolerant=0, allow_sourcing=False, expand=True):
 	except Exception as e:
 		raise portage.exception.ParseError(str(e)+" in "+mycfg)
 	return mykeys
-	
-#cache expansions of constant strings
-cexpand={}
+
 def varexpand(mystring, mydict=None):
 	if mydict is None:
 		mydict = {}
-	newstring = cexpand.get(" "+mystring, None)
-	if newstring is not None:
-		return newstring
 
 	"""
 	new variable expansion code.  Preserves quotes, handles \n, etc.
@@ -666,7 +661,7 @@ def varexpand(mystring, mydict=None):
 	insing=0
 	indoub=0
 	pos=1
-	newstring=" "
+	newstring = ""
 	while (pos<len(mystring)):
 		if (mystring[pos]=="'") and (mystring[pos-1]!="\\"):
 			if (indoub):
@@ -724,7 +719,6 @@ def varexpand(mystring, mydict=None):
 				while mystring[pos] in validchars:
 					if (pos+1)>=len(mystring):
 						if braced:
-							cexpand[mystring]=""
 							return ""
 						else:
 							pos=pos+1
@@ -733,12 +727,10 @@ def varexpand(mystring, mydict=None):
 				myvarname=mystring[myvstart:pos]
 				if braced:
 					if mystring[pos]!="}":
-						cexpand[mystring]=""
 						return ""
 					else:
 						pos=pos+1
 				if len(myvarname)==0:
-					cexpand[mystring]=""
 					return ""
 				numvars=numvars+1
 				if myvarname in mydict:
@@ -749,9 +741,8 @@ def varexpand(mystring, mydict=None):
 		else:
 			newstring=newstring+mystring[pos]
 			pos=pos+1
-	if numvars==0:
-		cexpand[mystring]=newstring[1:]
-	return newstring[1:]	
+
+	return newstring
 
 # broken and removed, but can still be imported
 pickle_write = None
-- 
2.26.2