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# 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.
class Patcher(object):
def GetPatchedFiles(self, version=None):
'''Returns patched files as(added_files, deleted_files, modified_files)
from the patchset specified by |version|.
'''
raise NotImplementedError(self.__class__)
def GetVersion(self):
'''Returns patch version. Returns None when nothing is patched by the
patcher.
'''
raise NotImplementedError(self.__class__)
def Apply(self, paths, file_system, binary, version=None):
'''Apply the patch to added/modified files. Returns Future with patched
data. Throws FileNotFoundError if |paths| contains deleted files.
'''
raise NotImplementedError(self.__class__)
def GetIdentity(self):
'''Returns a string that identifies this patch. Typically it would be the
codereview server's ID for this patch.
'''
raise NotImplementedError(self.__class__)
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