Tell emerge to stop beeping at us.

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 273 matching lines @@
       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")
 
     # Modify the environment to disable locking.
     os.environ["PORTAGE_LOCKS"] = "false"
+
+    # Turn off interactive delays
+    os.environ["EBEEP_IGNORE"] = "1"
+    os.environ["EPAUSE_IGNORE"] = "1"
     os.environ["UNMERGE_DELAY"] = "0"
 
     # Parse the emerge options.
     action, opts, cmdline_packages = parse_opts(emerge_args)
 
     # If we're installing to the board, we want the --root-deps option so that
     # portage will install the build dependencies to that location as well.
     if self.board:
       opts.setdefault("--root-deps", True)
 
@@ skipping 957 matching lines @@
       for db_pkg in final_db.match_pkgs(pkg):
         print "Adding %s to world" % db_pkg.cp
         new_world_pkgs.append(db_pkg.cp)
     if new_world_pkgs:
       world_set.update(new_world_pkgs)
 
   print "Done"
 
 if __name__ == "__main__":
   main()