--- /usr/lib/python2.2/site-packages/portage.py	2002-12-29 19:39:01.000000000 -0800
+++ /usr/local/portage/portage.py	2003-01-09 19:45:44.000000000 -0800
@@ -800,7 +800,7 @@
 		self.regenerate()
 	
 	def regenerate(self,useonly=0):
-		global incrementals,usesplit,profiledir
+		global incrementals,usesplit,pkgusesplit,profiledir
 		if useonly:
 			myincrementals=["USE"]
 		else:
@@ -817,6 +817,8 @@
 					continue
 				#variables are already expanded
 				mysplit=curdb[mykey].split()
+				if mykey=="USE":
+					mysplit=self.parseuse(mysplit)
 				for x in mysplit:
 					if x=="-*":
 						# "-*" is a special "minus" var that means "unset all settings".  so USE="-* gnome" will have *just* gnome enabled.
@@ -850,7 +852,54 @@
 					if self.configdict["defaults"]["ARCH"] not in usesplit:
 						usesplit.insert(0,self.configdict["defaults"]["ARCH"])
 						self.configlist[-1]["USE"]=string.join(usesplit," ")
+		mypkgusesplit=pkgusesplit
+		pkgusesplit={}
+		for x in mypkgusesplit:
+			mypos=0
+			while mypos<len(mypkgusesplit[x]):
+				if mypkgusesplit[x][mypos] in usesplit:
+					del mypkgusesplit[x][mypos]
+				else:
+					mypos=mypos+1
+			if mypkgusesplit[x]!=[]:
+				pkgusesplit[x]=mypkgusesplit[x]
 	
+	def parseuse(self,myusesplit,mypos=0):
+		global pkgusesplit
+		try:
+			if pkgusesplit: pass
+		except:
+			pkgusesplit={}
+		while mypos<len(myusesplit):
+			if myusesplit[mypos]=="(":
+				firstpos=mypos
+				mypos=mypos+1
+				while mypos<len(myusesplit):
+					if myusesplit[mypos]==")":
+						if mypos==firstpos+3:
+							myitems=[myusesplit[mypos-1]]
+						elif mypos>firstpos+3:
+							myitems=myusesplit[firstpos+2:mypos]
+						pkg=myusesplit[firstpos+1]
+						pkgusesplit[pkg]=[]
+						for x in myitems:
+							if x=="-*" or x=="*":
+								myusesplit[firstpos:mypos+1]=[]
+								mypos=firstpos-1
+								break
+							if x[0]=="-":
+								y=x[1:]
+							else:
+								y="-"+x
+							if x not in pkgusesplit[pkg] and y not in pkgusesplit[pkg]:
+								pkgusesplit[pkg].append(x)
+						myusesplit[firstpos:mypos+1]=[]
+						mypos=firstpos-1
+						break
+					mypos=mypos+1
+			mypos=mypos+1
+		return myusesplit
+
 	def __getitem__(self,mykey):
 		if mykey=="CONFIG_PROTECT_MASK":
 			suffix=" /etc/env.d"
@@ -2218,15 +2267,28 @@
 		mydep=mydep[1:]
 	return prefix+cpv_expand(mydep,mydb)+postfix
 
-def dep_check(depstring,mydbapi,use="yes",mode=None):
+def dep_check(depstring,mydbapi,use="yes",mode=None,parent=None):
 	"""Takes a depend string and parses the condition."""
-	global usesplit
+	global usesplit,pkgusesplit
 	if use=="all":
 		#enable everything (for repoman)
 		myusesplit=["*"]
 	elif use=="yes":
 		#default behavior
 		myusesplit=usesplit
+		if parent and (pkgusesplit!={}):
+			myparent=string.split(parent)[2]
+			for x in pkgusesplit:
+				if string.count(myparent,x,0):
+					for y in pkgusesplit[x]:
+						if y[0]=="-":
+							z=y[1:]
+						else:
+							z="-"+y
+						if z in myusesplit:
+							myusesplit.remove(z)
+						if y not in myusesplit:
+							myusesplit.append(y)
 	else:
 		#we are being run by autouse(), don't consult USE vars yet.
 		myusesplit=[]