76f4183dff
The charm-helpers project have re-licensed to Apache 2.0 inline with the agreed licensing approach to intefaces, layers and charms generally. Resync helpers to bring charmhelpers inline with charm codebase. Change-Id: I1b988a174d4a236599cffef8334a2923bf031fff
44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# 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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__author__ = 'Jorge Niedbalski <niedbalski@ubuntu.com>'
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import os
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import subprocess
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def sed(filename, before, after, flags='g'):
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"""
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Search and replaces the given pattern on filename.
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:param filename: relative or absolute file path.
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:param before: expression to be replaced (see 'man sed')
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:param after: expression to replace with (see 'man sed')
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:param flags: sed-compatible regex flags in example, to make
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the search and replace case insensitive, specify ``flags="i"``.
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The ``g`` flag is always specified regardless, so you do not
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need to remember to include it when overriding this parameter.
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:returns: If the sed command exit code was zero then return,
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otherwise raise CalledProcessError.
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"""
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expression = r's/{0}/{1}/{2}'.format(before,
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after, flags)
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return subprocess.check_call(["sed", "-i", "-r", "-e",
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expression,
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os.path.expanduser(filename)])
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