Source code for kiwi.utils.sysconfig

# Copyright (c) 2015 SUSE Linux GmbH.  All rights reserved.
#
# This file is part of kiwi.
#
# kiwi is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# kiwi 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 kiwi.  If not, see <http://www.gnu.org/licenses/>
#
import os


[docs]class SysConfig: """ **Read and Write sysconfig style files** :param str source_file: source file path """ def __init__(self, source_file): self.source_file = source_file self.data_dict = {} self.data_list = [] self._read() def __setitem__(self, key, value): if key not in self.data_dict: self.data_list.append(key) self.data_dict[key] = value def __getitem__(self, key): return self.data_dict[key] def __contains__(self, key): return key in self.data_dict
[docs] def get(self, key): return self.data_dict.get(key)
[docs] def write(self): """ Write back source file with changed content but in same order """ with open(self.source_file, 'w') as source: for line in self.data_list: if line in self.data_dict: key = line value = self.data_dict[key] source.write('{0}={1}'.format(key, value)) else: source.write(line) source.write(os.linesep)
def _read(self): """ Read file into a list and a key/value dictionary Only lines which are not considered a comment and containing the structure key=value are parsed into the key/value dictionary. In order to keep the order of lines a list is stored too. Those lines matching the key/value format are stored with their key in the list as a placeholder """ if os.path.exists(self.source_file): with open(self.source_file) as source: for line in source.readlines(): line = line.strip() if '#' not in line and '=' in line: elements = line.split('=') key = elements.pop(0).strip() value = '='.join(elements) self.data_dict[key] = value self.data_list.append(key) else: self.data_list.append(line)