# -*- 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)