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# apt-forktracer - a utility for managing package versions
# Copyright (C) 2008 Marcin Owsiany <porridge@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. 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from apt_forktracer.config_stanza import ConfigStanza
class ConfigParser:
"""Parses a text file, producing ConfigStanza objects."""
def __add(self, stanza, lineno, ret, config):
"""Private method for gathering stanzas."""
if not stanza.is_empty():
ret.append(stanza.finish(lineno))
if config:
config.add(stanza)
stanza = ConfigStanza()
return stanza
def load(self, file, config = None):
"""Parses an open file object, and returns a list of stanzas found. If
an optional config argument (a Config object) is provided, it also adds
the stanzas to it.
Parsing errors are raised as exceptions.
"""
ret = []
stanza = ConfigStanza()
lineno = 0
for line in file:
lineno += 1
line = line.strip()
if line == '':
stanza = self.__add(stanza, lineno, ret, config)
continue
colon = line.find(':')
if colon != -1:
key, val = line.split(':', 1)
stanza.set(key.strip(), val.strip(), lineno)
else:
raise ValueError('invalid line %d: %s' % (lineno, repr(line)))
stanza = self.__add(stanza, lineno, ret, config)
return ret
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