diff options
Diffstat (limited to 'charms/trusty/cassandra/hooks/charmhelpers/core/files.py')
-rw-r--r-- | charms/trusty/cassandra/hooks/charmhelpers/core/files.py | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/charms/trusty/cassandra/hooks/charmhelpers/core/files.py b/charms/trusty/cassandra/hooks/charmhelpers/core/files.py new file mode 100644 index 0000000..0f12d32 --- /dev/null +++ b/charms/trusty/cassandra/hooks/charmhelpers/core/files.py @@ -0,0 +1,45 @@ +#!/usr/bin/env python +# -*- coding: utf-8 -*- + +# Copyright 2014-2015 Canonical Limited. +# +# This file is part of charm-helpers. +# +# charm-helpers is free software: you can redistribute it and/or modify +# it under the terms of the GNU Lesser General Public License version 3 as +# published by the Free Software Foundation. +# +# charm-helpers 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 Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public License +# along with charm-helpers. If not, see <http://www.gnu.org/licenses/>. + +__author__ = 'Jorge Niedbalski <niedbalski@ubuntu.com>' + +import os +import subprocess + + +def sed(filename, before, after, flags='g'): + """ + Search and replaces the given pattern on filename. + + :param filename: relative or absolute file path. + :param before: expression to be replaced (see 'man sed') + :param after: expression to replace with (see 'man sed') + :param flags: sed-compatible regex flags in example, to make + the search and replace case insensitive, specify ``flags="i"``. + The ``g`` flag is always specified regardless, so you do not + need to remember to include it when overriding this parameter. + :returns: If the sed command exit code was zero then return, + otherwise raise CalledProcessError. + """ + expression = r's/{0}/{1}/{2}'.format(before, + after, flags) + + return subprocess.check_call(["sed", "-i", "-r", "-e", + expression, + os.path.expanduser(filename)]) |