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# vi: ts=4 expandtab
#
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This library is used to parse/write
# out the various sysconfig files edited
#
# It has to be slightly modified though
# to ensure that all values are quoted
# since these configs are usually sourced into
# bash scripts...
from configobj import ConfigObj
# See: http://tiny.cc/oezbgw
D_QUOTE_CHARS = {
"\"": "\\\"",
"(": "\\(",
")": "\\)",
"$": '\$',
'`': '\`',
}
# This class helps adjust the configobj
# writing to ensure that when writing a k/v
# on a line, that they are properly quoted
# and have no spaces between the '=' sign.
# - This is mainly due to the fact that
# the sysconfig scripts are often sourced
# directly into bash/shell scripts so ensure
# that it works for those types of use cases.
class QuotingConfigObj(ConfigObj):
def __init__(self, lines):
ConfigObj.__init__(self, lines,
interpolation=False,
write_empty_values=True)
def _quote_posix(self, text):
if not text:
return ''
for (k, v) in D_QUOTE_CHARS.iteritems():
text = text.replace(k, v)
return '"%s"' % (text)
def _quote_special(self, text):
if text.lower() in ['yes', 'no', 'true', 'false']:
return text
else:
return self._quote_posix(text)
def _write_line(self, indent_string, entry, this_entry, comment):
# Ensure it is formatted fine for
# how these sysconfig scripts are used
val = self._decode_element(self._quote(this_entry))
# Single quoted strings should
# always work.
if not val.startswith("'"):
# Perform any special quoting
val = self._quote_special(val)
key = self._decode_element(self._quote(entry, multiline=False))
cmnt = self._decode_element(comment)
return '%s%s%s%s%s' % (indent_string,
key,
"=",
val,
cmnt)
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