luci-py/isolateserver.py: Add archive support when downloading.

client/utils/fs.py

 # Copyright 2015 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """Wraps os, os.path and shutil functions to work around MAX_PATH on Windows."""
 
 import __builtin__
 import inspect
 import os
 import shutil
@@ skipping 85 matching lines @@
 
 
 def copy2(src, dst):
   return shutil.copy2(extend(src), extend(dst))
 
 
 def rmtree(path, *args, **kwargs):
   return shutil.rmtree(extend(path), *args, **kwargs)
 
 
+copyfileobj = shutil.copyfileobj
+
 ## The rest
 
 
 def _get_lambda(func):
   return lambda path, *args, **kwargs: func(extend(path), *args, **kwargs)
 
 
 def _is_path_fn(func):
   return (inspect.getargspec(func)[0] or [None]) == 'path'
 
@@ skipping 11 matching lines @@
 for _fn in _os_fns:
   if hasattr(os, _fn):
     sys.modules[__name__].__dict__.setdefault(
         _fn, _get_lambda(getattr(os, _fn)))
 
 
 for _fn in _os_path_fns:
   if hasattr(os.path, _fn):
     sys.modules[__name__].__dict__.setdefault(
         _fn, _get_lambda(getattr(os.path, _fn)))