Multiple improvements to windows bash integration.

depot-tools-auth.py

 #!/usr/bin/env python
 # Copyright 2015 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.
 
 """Manages cached OAuth2 tokens used by other depot_tools scripts.
 
 Usage:
   depot-tools-auth login codereview.chromium.org
   depot-tools-auth info codereview.chromium.org
   depot-tools-auth logout codereview.chromium.org
 """
 
 import logging
 import optparse
 import sys
+import os
 
 from third_party import colorama
 
 import auth
 import subcommand
 
 __version__ = '1.0'
 
 
 @subcommand.usage('<hostname>')
@@ skipping 60 matching lines @@
 def main(argv):
   dispatcher = subcommand.CommandDispatcher(__name__)
   try:
     return dispatcher.execute(OptionParser(), argv)
   except auth.AuthenticationError as e:
     print >> sys.stderr, e
     return 1
 
 
 if __name__ == '__main__':
-  colorama.init()
+  colorama.init(wrap="TERM" not in os.environ)
   try:
     sys.exit(main(sys.argv[1:]))
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)