New build flag system, convert Google Now flag

tools/grit/grit/util.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 '''Utilities used by GRIT.
 '''
 
 import codecs
 import htmlentitydefs
@@ skipping 465 matching lines @@
 def IsVerbose():
   return verbose
 
 def IsExtraVerbose():
   return extra_verbose
 
 def ParseDefine(define):
   '''Parses a define argument and returns the name and value.
 
   The format is either "NAME=VAL" or "NAME", using True as the default value.
-  Values of "1" and "0" are transformed to True and False respectively.
+  Values of "1"/"true" and "0"/"false" are transformed to True and False
+  respectively.
 
   Args:
     define: a string of the form "NAME=VAL" or "NAME".
 
   Returns:
     A (name, value) pair. name is a string, value a string or boolean.
   '''
   parts = [part.strip() for part in define.split('=', 1)]
   assert len(parts) >= 1
   name = parts[0]
   val = True
   if len(parts) > 1:
     val = parts[1]
-  if val == "1": val = True
-  elif val == "0": val = False
+  if val == "1" or val == "true": val = True
+  elif val == "0" or val == "false": val = False
   return (name, val)
 
 
 class Substituter(object):
   '''Finds and substitutes variable names in text strings.
 
   Given a dictionary of variable names and values, prepares to
   search for patterns of the form [VAR_NAME] in a text.
   The value will be substituted back efficiently.
   Also applies to tclib.Message objects.
@@ skipping 140 matching lines @@
     return self._AsCurrentDirClass(self.GetPath())
 
   class _AsCurrentDirClass(object):
     def __init__(self, path):
       self.path = path
     def __enter__(self):
       self.oldpath = os.getcwd()
       os.chdir(self.path)
     def __exit__(self, *exc_info):
       os.chdir(self.oldpath)