Strip comments and whitespace from Javascript resources

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
 import os
 import re
 import shutil
 import sys
 import tempfile
 import time
 import types
 from xml.sax import saxutils
 
 from grit import lazy_re
 
 _root_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), '..'))
 
+_replacement_paths = {}
+
 
 # Unique constants for use by ReadFile().
 BINARY, RAW_TEXT = range(2)
 
 
 # Unique constants representing data pack encodings.
 _, UTF8, UTF16 = range(3)
 
 
 def Encode(message, encoding):
@@ skipping 162 matching lines @@
 
 def ReadFile(filename, encoding):
   '''Reads and returns the entire contents of the given file.
 
   Args:
     filename: The path to the file.
     encoding: A Python codec name or one of two special values: BINARY to read
               the file in binary mode, or RAW_TEXT to read it with newline
               conversion but without decoding to Unicode.
   '''
+  path = os.path.abspath(filename)
+  replacement_path = _replacement_paths.get(path, path)
   mode = 'rb' if encoding == BINARY else 'rU'
-  with open(filename, mode) as f:
+  with open(replacement_path, mode) as f:
     data = f.read()
   if encoding not in (BINARY, RAW_TEXT):
     data = data.decode(encoding)
   return data
 
 
 def WrapOutputStream(stream, encoding = 'utf-8'):
   '''Returns a stream that wraps the provided stream, making it write
   characters using the specified encoding.'''
   return codecs.getwriter(encoding)(stream)
@@ skipping 435 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)
+
+def SetReplacementPaths(replacement_paths):
+  global _replacement_paths
+  _replacement_paths = replacement_paths