chrome/common/extensions/docs/server2/empty_dir_file_system.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 from file_system import FileNotFoundError, FileSystem, StatInfo
   6 from future import Future
   7 from path_util import IsDirectory
   8
   9
  10 class EmptyDirFileSystem(FileSystem):
  11   '''A FileSystem with empty directories. Useful to inject places to disable
  12   features such as samples.
  13   '''
  14   def Read(self, paths, skip_not_found=False):
  15     result = {}
  16     for path in paths:
  17       if not IsDirectory(path):
  18         if skip_not_found: continue
  19         raise FileNotFoundError('EmptyDirFileSystem cannot read %s' % path)
  20       result[path] = []
  21     return Future(value=result)
  22
  23   def Refresh(self):
  24     return Future(value=())
  25
  26   def Stat(self, path):
  27     if not IsDirectory(path):
  28       raise FileNotFoundError('EmptyDirFileSystem cannot stat %s' % path)
  29     return StatInfo(0, child_versions=[])
  30
  31   def GetIdentity(self):
  32     return self.__class__.__name__