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snapshottarget.py
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snapshottarget.py
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# Defines a snapshot target, or an abstract entity of
# which a snapshot can be made of / restored
#
# (C) Copyright 2011 Mo Morsi (mo@morsi.org)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License, Version 3,
# as published by the Free Software Foundation
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
class SnapshotTarget:
"""Abstract entity on which to perform and restore a snapshot"""
# actual target backends snap implements (in the order which they are to execute)
BACKENDS = ['repos', 'packages', 'files', 'services']
def backup(self, basedir):
'''Take a snapshot of the target
@param - basedir - directory which to store snapshot data in'''
raise NotImplementedError()
def restore(self, basedir):
'''Restore any package management files previously backed up
@param - basedir - directory which to restore snapshot from'''
raise NotImplementedError()