diff options
Diffstat (limited to 'charms/trusty/keepalived/hooks/charmhelpers/core/strutils.py')
-rw-r--r-- | charms/trusty/keepalived/hooks/charmhelpers/core/strutils.py | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/charms/trusty/keepalived/hooks/charmhelpers/core/strutils.py b/charms/trusty/keepalived/hooks/charmhelpers/core/strutils.py new file mode 100644 index 0000000..a2a784a --- /dev/null +++ b/charms/trusty/keepalived/hooks/charmhelpers/core/strutils.py @@ -0,0 +1,42 @@ +#!/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/>. + +import six + + +def bool_from_string(value): + """Interpret string value as boolean. + + Returns True if value translates to True otherwise False. + """ + if isinstance(value, six.string_types): + value = six.text_type(value) + else: + msg = "Unable to interpret non-string value '%s' as boolean" % (value) + raise ValueError(msg) + + value = value.strip().lower() + + if value in ['y', 'yes', 'true', 't', 'on']: + return True + elif value in ['n', 'no', 'false', 'f', 'off']: + return False + + msg = "Unable to interpret string value '%s' as boolean" % (value) + raise ValueError(msg) |