Source code for toxicbuild.core.conf

# -*- coding: utf-8 -*-

# Copyright 2015 Juca Crispim <juca@poraodojuca.net>

# This file is part of toxicbuild.

# toxicbuild 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.

# toxicbuild 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 toxicbuild. If not, see <http://www.gnu.org/licenses/>.


import os
from toxicbuild.core.exceptions import ConfigError
from toxicbuild.core.utils import load_module_from_file


[docs]class Settings: """ Simple interface to a settings file. """ def __init__(self, envvar, default_filename): """:param envvar: Environment variable to look for settings file name :param default_filename: filename to use in case environment variable is not set. """ self._envvar = envvar self._default_filename = default_filename self._settings_module = self._get_settings_module() @property def _filename(self): """ Returns the filename to use as settings module. Returns the filename on environment variable or ``self._default_filename``. """ return self._get_settings_file_from_envvar() or self._default_filename def _get_settings_file_from_envvar(self): """ Returns the value for the environment variable ``self._envvar`` """ settings_file = os.environ.get(self._envvar) return settings_file def _get_settings_module(self): """ Returns the module to be used as the settings module. """ module = load_module_from_file(self._filename) return module def __getattr__(self, attrname): try: attr = getattr(self._settings_module, attrname) except AttributeError: msg = 'Your settings {} file does not have an attribute {}.'.\ format(self._filename, attrname) raise ConfigError(msg) return attr def __setattr__(self, attrname, value): # haha! exceptions = ['_envvar', '_default_filename', '_settings_module'] if attrname not in exceptions: raise AttributeError('you can\'t set here') super(Settings, self).__setattr__(attrname, value)