108 lines
3 KiB
Python
108 lines
3 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright(C) 2010 Romain Bignon
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#
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# This program 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, version 3 of the License.
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#
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# This program 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 this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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from __future__ import with_statement
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import os
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import tempfile
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import logging
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import yaml
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from .iconfig import IConfig, ConfigError
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__all__ = ['YamlConfig']
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class YamlConfig(IConfig):
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def __init__(self, path):
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self.path = path
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self.values = {}
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def load(self, default={}):
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self.values = default.copy()
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logging.debug(u'Loading application configuration file: %s.' % self.path)
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try:
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with open(self.path, 'r') as f:
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self.values = yaml.load(f)
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logging.debug(u'Application configuration file loaded: %s.' % self.path)
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except IOError:
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self.save()
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logging.debug(u'Application configuration file created with default values: %s. Please customize it.' % self.path)
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if self.values is None:
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self.values = {}
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def save(self):
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# write in a temporary file to avoid corruption problems
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fd, path = tempfile.mkstemp(dir=os.path.dirname(self.path))
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with os.fdopen(fd, 'w') as f:
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yaml.dump(self.values, f)
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os.rename(path, self.path)
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def get(self, *args, **kwargs):
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default = None
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if 'default' in kwargs:
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default = kwargs['default']
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v = self.values
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for a in args[:-1]:
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try:
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v = v[a]
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except KeyError:
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if not default is None:
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v[a] = {}
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v = v[a]
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else:
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raise ConfigError()
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except TypeError:
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raise ConfigError()
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try:
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v = v[args[-1]]
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except KeyError:
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v[args[-1]] = default
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v = v[args[-1]]
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return v
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def set(self, *args):
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v = self.values
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for a in args[:-2]:
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try:
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v = v[a]
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except KeyError:
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v[a] = {}
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v = v[a]
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except TypeError:
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raise ConfigError()
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v[args[-2]] = args[-1]
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def delete(self, *args):
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v = self.values
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for a in args[:-1]:
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try:
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v = v[a]
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except KeyError:
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return
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except TypeError:
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raise ConfigError()
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v.pop(args[-1], None)
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