85 lines
2.8 KiB
Python
85 lines
2.8 KiB
Python
# Copyright (c) 2015 SUSE Linux GmbH. All rights reserved.
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#
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# This file is part of kiwi.
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#
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# kiwi is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# kiwi is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with kiwi. If not, see <http://www.gnu.org/licenses/>
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#
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import os
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class SysConfig:
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"""
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**Read and Write sysconfig style files**
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:param str source_file: source file path
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"""
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def __init__(self, source_file):
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self.source_file = source_file
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self.data_dict = {}
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self.data_list = []
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self._read()
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def __setitem__(self, key, value):
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if key not in self.data_dict:
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self.data_list.append(key)
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self.data_dict[key] = value
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def __getitem__(self, key):
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return self.data_dict[key]
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def __contains__(self, key):
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return key in self.data_dict
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def get(self, key):
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return self.data_dict.get(key)
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def write(self):
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"""
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Write back source file with changed content but in same order
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"""
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with open(self.source_file, 'w') as source:
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for line in self.data_list:
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if line in self.data_dict:
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key = line
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value = self.data_dict[key]
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source.write('{0}={1}'.format(key, value))
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else:
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source.write(line)
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source.write(os.linesep)
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def _read(self):
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"""
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Read file into a list and a key/value dictionary
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Only lines which are not considered a comment and
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containing the structure key=value are parsed into
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the key/value dictionary. In order to keep the order
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of lines a list is stored too. Those lines matching
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the key/value format are stored with their key in
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the list as a placeholder
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"""
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if os.path.exists(self.source_file):
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with open(self.source_file) as source:
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for line in source.readlines():
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line = line.strip()
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if '#' not in line and '=' in line:
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elements = line.split('=')
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key = elements.pop(0).strip()
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value = '='.join(elements)
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self.data_dict[key] = value
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self.data_list.append(key)
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else:
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self.data_list.append(line)
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