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__ 33
