Pulling in hammer changes.

site_scons/site_tools/windows_hard_link.py

 #!/usr/bin/python2.4
 # Copyright 2008, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
@@ skipping 22 matching lines @@
 This module is a SCons tool which should be include in the topmost windows
 environment.  It is usually included by the target_platform_windows tool.
 """
 
 
 import os
 import stat
 import sys
 import SCons
 
-if sys.platform in ('win32', 'cygwin'):
+if sys.platform == 'win32':
   # Only attempt to load pywin32 on Windows systems
   try:
     import win32file
   except ImportError:
     print ('Warning: Unable to load win32file module; using copy instead of'
            ' hard linking for env.Install().  Is pywin32 present?')
 
 #------------------------------------------------------------------------------
 # Python 2.4 and 2.5's os module doesn't support os.link on Windows, even
 # though Windows does have hard-link capability on NTFS filesystems.  So by
@@ skipping 45 matching lines @@
 
 
 def generate(env):
   # NOTE: SCons requires the use of this name, which fails gpylint.
   """SCons entry point for this tool."""
   env = env  # Silence gpylint
 
   # Patch in our hard link function, if we were able to load pywin32
   if 'win32file' in globals():
     SCons.Node.FS._hardlink_func = _HardLink