45 lines
1.4 KiB
Python
45 lines
1.4 KiB
Python
# Copyright 2014-2015 Canonical Limited.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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''' Helper for managing alternatives for file conflict resolution '''
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import subprocess
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import shutil
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import os
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def install_alternative(name, target, source, priority=50):
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''' Install alternative configuration '''
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if (os.path.exists(target) and not os.path.islink(target)):
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# Move existing file/directory away before installing
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shutil.move(target, '{}.bak'.format(target))
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cmd = [
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'update-alternatives', '--force', '--install',
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target, name, source, str(priority)
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]
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subprocess.check_call(cmd)
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def remove_alternative(name, source):
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"""Remove an installed alternative configuration file
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:param name: string name of the alternative to remove
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:param source: string full path to alternative to remove
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"""
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cmd = [
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'update-alternatives', '--remove',
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name, source
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]
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subprocess.check_call(cmd)
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