Fix parallel_emerge --unmerge to actually work.

parallel_emerge

 #!/usr/bin/python2.6
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Program to run emerge in parallel, for significant speedup.
 
 Usage:
  ./parallel_emerge [--board=BOARD] [--workon=PKGS] [--no-workon-deps]
                    [emerge args] package"
@@ skipping 586 matching lines @@
     elif action == "uninstall":
       cmdline = EmergeCommand() + " --nodeps --unmerge =" + target
     else:
       # This package is a dependency of something we specifically
       # requested. Therefore we should install it but not allow it
       # in the "world" file, which represents explicit installs.
       # --oneshot" here will prevent it from being tagged in world.
       cmdline = EmergeCommand() + " --nodeps --oneshot "
       this_pkg = self._deps_map[target]
       if this_pkg["workon"]:
-        # --usepkg=n --getbinpkg=n: Build from source
+        # --usepkg=n --usepkgonly=n --getbinpkg=n
+        # --getbinpkgonly=n: Build from source
         # --selective=n: Re-emerge even if package is already installed.
-        cmdline += "--usepkg=n --getbinpkg=n --selective=n "
+        cmdline += ("--usepkg=n --usepkgonly=n --getbinpkg=n "
+                    "--getbinpkgonly=n --selective=n ")
       cmdline += "=" + target
       deps_info = this_pkg["deps_info"]
       if deps_info["uninstall"]:
         package = "%(pkgdir)s/%(pkgname)s-%(oldversion)s" % deps_info
         cmdline += " && %s -C =%s" % (EmergeCommand(), package)
 
     print "+ %s" % cmdline
 
     # Store output in a temp file as it is too big for a unix pipe.
     stdout_buffer = tempfile.TemporaryFile()
@@ skipping 126 matching lines @@
             # Print an update.
             self._Status()
 
 
 # Main control code.
 OPTS, EMERGE_ACTION, EMERGE_OPTS, EMERGE_FILES = ParseArgs(sys.argv)
 
 if EMERGE_ACTION is not None:
   # Pass action arguments straight through to emerge
   EMERGE_OPTS["--%s" % EMERGE_ACTION] = True
-  sys.exit(os.system(EmergeCommand()))
+  sys.exit(os.system(EmergeCommand() + " " + " ".join(EMERGE_FILES)))
 elif not EMERGE_FILES:
   Usage()
   sys.exit(1)
 
 print "Starting fast-emerge."
 print " Building package %s on %s" % (" ".join(EMERGE_FILES),
                                       OPTS.get("board", "root"))
 
 # If the user supplied the --workon option, we may have to run emerge twice
 # to generate a dependency ordering for packages that depend on the workon
@@ skipping 21 matching lines @@
 
 if VERBOSE:
   PrintDepsMap(dependency_graph)
 
 # Run the queued emerges.
 scheduler = EmergeQueue(dependency_graph)
 scheduler.Run()
 
 print "Done"