blob: 4a5e7eca8ab530bddcb8bd23d76d0ab2cb9ecc33 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
|
# Copyright 2013 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.
from file_system import FileSystem, FileNotFoundError
from future import Future
class OfflineFileSystem(FileSystem):
'''An offline FileSystem which masquerades as another file system. It throws
FileNotFound error for all operations, and overrides GetIdentity.
'''
def __init__(self, fs):
self._fs = fs
def Read(self, paths, skip_not_found=False):
if skip_not_found: return Future(value={})
def raise_file_not_found():
raise FileNotFoundError('File system is offline, cannot read %s' % paths)
return Future(callback=raise_file_not_found)
def Stat(self, path):
raise FileNotFoundError('File system is offline, cannot read %s' % path)
def GetIdentity(self):
return self._fs.GetIdentity()
|
