Index: emerge
===================================================================
--- emerge	(revision 4311)
+++ emerge	(working copy)
@@ -40,6 +40,8 @@
 import portage_locks
 import portage_exception
 from portage_data import secpass
+from portage_const import SET_PATH
+from portage_sets import FileList
 
 if not hasattr(__builtins__, "set"):
 	from sets import Set as set
@@ -194,7 +196,8 @@
 "--newuse",       "--nocolor",
 "--nodeps",       "--noreplace",
 "--nospinner",    "--oneshot",
-"--onlydeps",     "--pretend",
+"--onlydeps",     "--package-set",
+"--pretend",
 "--quiet",        "--resume",
 "--searchdesc",   "--selective",
 "--skipfirst",    "--skip-first",
@@ -357,6 +360,8 @@
 	sub=[]
 	if "--update" in myopts or myaction in ("system", "world"):
 		add.extend(["selective","empty"])
+	if "--package-set" in myopts:
+		add.extend(["selective"])
 	if "--emptytree" in myopts:
 		add.extend(["empty"])
 		sub.extend(["selective"])
@@ -1208,6 +1213,28 @@
 				retlist.append(y)
 		return retlist
 
+	def setCreate( self, set_id ):
+		""" Checks dependencies on non-system non-world sets """
+
+		packagelist = FileList( SET_PATH + os.path.sep + set_id )
+		missing_atoms = []
+		for pkg in packagelist.items:
+			print pkg
+                        try:
+                                if not self.select_dep(
+                                        self.target_root, pkg, raise_on_missing=True):
+                                        print "\n\n!!! Problem resolving dependencies for", mydep
+                                        return 0
+                        except ValueError:
+                                missing_atoms.append(pkg)
+                if missing_atoms:
+                        print "\n" + colorize("BAD", "!!!") + \
+                                " Ebuilds for the following packages are either all"
+                        print colorize("BAD", "!!!") + " masked or don't exist:"
+                        print " ".join(missing_atoms) + "\n"
+
+                return 1
+
 	def xcreate(self,mode="system"):
 		world_problems = False
 		if mode=="system":
@@ -3409,7 +3436,16 @@
 		myparams = create_depgraph_params(myopts, myaction)
 		mydepgraph = depgraph(settings, trees,
 			myopts, myparams, spinner)
-		if myaction in ["system","world"]:
+		if "--package-set" in myopts:
+			sets = myfiles
+                        if not ("--quiet" in myopts):
+				print "Calculating",myaction,"dependencies  ",
+				sys.stdout.flush()
+				unfulfilled_sets = [p_set for p_set in sets if not mydepgraph.setCreate(p_set)]
+				if unfulfilled_sets:
+					print "!!! Depgraph creation failed."
+					sys.exit(1)					
+		elif myaction in ["system","world"]:
 			if not ("--quiet" in myopts):
 				print "Calculating",myaction,"dependencies  ",
 				sys.stdout.flush()