devserver: allow calling devserver from anywhere

devserver.py

 #!/usr/bin/python
 
 # Copyright (c) 2009-2010 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.
 
 """A CherryPy-based webserver to host images and build packages."""
 
 import cherrypy
 import optparse
@@ skipping 12 matching lines @@
 
 def _GetConfig(options):
   """Returns the configuration for the devserver."""
   base_config = { 'global':
                   { 'server.log_request_headers': True,
                     'server.protocol_version': 'HTTP/1.1',
                     'server.socket_host': '0.0.0.0',
                     'server.socket_port': int(options.port),
                     'server.socket_timeout': 6000,
                     'response.timeout': 6000,
-                    'tools.staticdir.root': os.getcwd(),
+                    'tools.staticdir.root':
+                      os.path.dirname(os.path.abspath(sys.argv[0])),
                   },
                   '/build':
                   {
                     'response.timeout': 100000,
                   },
                   '/update':
                   {
                     # Gets rid of cherrypy parsing post file for args.
                     'request.process_request_body': False,
                     'response.timeout': 10000,
@@ skipping 170 matching lines @@
     # We don't run the dev server with this option.
     if options.validate_factory_config:
       sys.exit(0)
   elif options.pregenerate_update:
     if not updater.PreGenerateUpdate():
       sys.exit(1)
 
   # If the command line requested after setup, it's time to do it.
   if not options.exit:
     cherrypy.quickstart(DevServerRoot(), config=_GetConfig(options))