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#!/usr/bin/python3
# encoding=utf-8
#
# Copyright © 2014-2015 Simon McVittie <smcv@debian.org>
#
# This program 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 2
# of the License, or (at your option) any later version.
#
# 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.
#
# You can find the GPL license text on a Debian system under
# /usr/share/common-licenses/GPL-2.
import logging
import re
from .paths import CONFIG
logger = logging.getLogger(__name__)
COMMENT = re.compile(r'#.*')
OPTION = re.compile('^([A-Z_]+)=(["\']?)(.*)\\2$')
def read_config():
"""The world's simplest shell script parser.
"""
config = {
'install': False,
'preserve': True,
'verbose': False,
'install_method': '',
'gain_root_command': '',
}
try:
with open(CONFIG, encoding='utf-8') as conffile:
lineno = 0
for line in conffile:
lineno += 1
line = COMMENT.sub('', line)
line = line.strip()
if not line:
continue
match = OPTION.match(line)
if match:
k = match.group(1).lower()
v = match.group(3)
if k in config:
if v == 'yes':
config[k] = True
elif v == 'no':
config[k] = False
elif k in ('install_method', 'gain_root_command'):
config[k] = v
else:
logger.warning('%s:%d: unknown option value: %s=%r',
CONFIG, lineno, k, v)
else:
logger.warning('%s:%d: unknown option: %s',
CONFIG, lineno, k)
else:
logger.warning('%s:%d: could not parse line: %r',
CONFIG, lineno, line)
except OSError:
pass
return config
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