Added support for boards with only private overlays. (crosutils)

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]
                    [--force-remote-binary=PKGS] [emerge args] package
@@ skipping 279 matching lines @@
     # Setup various environment variables based on our current board. These
     # variables are normally setup inside emerge-${BOARD}, but since we don't
     # call that script, we have to set it up here. These variables serve to
     # point our tools at /build/BOARD and to setup cross compiles to the
     # appropriate board as configured in toolchain.conf.
     if self.board:
       os.environ["PORTAGE_CONFIGROOT"] = "/build/" + self.board
       os.environ["PORTAGE_SYSROOT"] = "/build/" + self.board
       os.environ["SYSROOT"] = "/build/" + self.board
       scripts_dir = os.path.dirname(os.path.realpath(__file__))
-      toolchain_path = "%s/../overlays/overlay-%s/toolchain.conf"
       # Strip the variant out of the board name to look for the toolchain. This
       # is similar to what setup_board does.
       board_no_variant = self.board.split('_')[0]
-      f = open(toolchain_path % (scripts_dir, board_no_variant))
+      public_toolchain_path = ("%s/../overlays/overlay-%s/toolchain.conf" %
+        (scripts_dir, board_no_variant))
+      private_toolchain_path = (
+        "%s/../private-overlays/overlay-%s-private/toolchain.conf" %
+        (scripts_dir, board_no_variant))
+      if os.path.isfile(public_toolchain_path):
+        toolchain_path = public_toolchain_path
+      elif os.path.isfile(private_toolchain_path):
+        toolchain_path = private_toolchain_path
+      else:
+        print "Not able to locate toolchain.conf in board overlays"
+        sys.exit(1)
+
+      f = open(toolchain_path)
       os.environ["CHOST"] = f.readline().strip()
       f.close()
 
       # Although CHROMEOS_ROOT isn't specific to boards, it's normally setup
       # inside emerge-${BOARD}, so we set it up here for compatibility. It
       # will be going away soon as we migrate to CROS_WORKON_SRCROOT.
       os.environ.setdefault("CHROMEOS_ROOT", os.environ["HOME"] + "/trunk")
 
     # Turn off interactive delays
     os.environ["EBEEP_IGNORE"] = "1"
@@ skipping 1520 matching lines @@
   # need to upgrade the rest of the packages. So we'll go ahead and do that.
   if portage_upgrade:
     args = sys.argv[1:] + ["--nomerge=sys-apps/portage"]
     os.execvp(os.path.realpath(sys.argv[0]), args)
 
   print "Done"
   sys.exit(0)
 
 if __name__ == "__main__":
   main()