Add a sky_server for running sky apps

sky/tools/skydb

 #!/usr/bin/env python
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import argparse
 import os
 import subprocess
 import sys
 import urlparse
 
 
 BUILD_DIRECTORY = 'out'
 CONFIG_DIRECTORY = 'Debug'
-MOJO_SHELL_PATH = os.path.abspath(os.path.join(__file__, os.pardir, os.pardir,
+SKY_TOOLS_DIRECTORY = os.path.abspath(os.path.join(__file__, os.pardir))
+MOJO_SHELL_PATH = os.path.abspath(os.path.join(SKY_TOOLS_DIRECTORY, os.pardir,
     os.pardir, BUILD_DIRECTORY, CONFIG_DIRECTORY, 'mojo_shell'))
 
 SUPPORTED_MIME_TYPES = [
     'text/html',
     'text/sky',
     'text/plain',
 ]
 
 def start_http_server_for_file(path):
     HTTP_PORT = 9999
-    directory = os.path.dirname(os.path.abspath(path))
     server_command = [
-        'python',
-        '-m',
-        'SimpleHTTPServer',
-        str(HTTP_PORT)
+        os.path.join(SKY_TOOLS_DIRECTORY, 'sky_server'),
+        os.path.dirname(os.path.abspath(path)),
+        str(HTTP_PORT),
     ]
-    subprocess.Popen(server_command, cwd=directory)
+    subprocess.Popen(server_command)
     return 'http://localhost:%s/%s' % (HTTP_PORT, os.path.basename(path))
 
 
 def main():
     parser = argparse.ArgumentParser(description='Sky launcher/debugger')
     parser.add_argument('--gdb', action='store_true')
     parser.add_argument('url', nargs='?', type=str)
     args = parser.parse_args()
 
     content_handlers = ['%s,%s' % (mime_type, 'mojo://sky_viewer/')
@@ skipping 13 matching lines @@
         prompt_args = '--args-for=mojo://sky_debugger_prompt/ %s' % url
         shell_command.append(prompt_args)
     if args.gdb:
         shell_command = ['gdb', '--args'] + shell_command
 
     print ' '.join(shell_command)
     subprocess.check_call(shell_command)
 
 
 if __name__ == '__main__':
-    main()
+    try:
+        main()
+    except (KeyboardInterrupt, SystemExit):
+        print "Quitting"