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# -*- coding: utf-8 -*-
# prefixers.py
# Copyright (C) 2013 LEAP
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
"""
Platform dependant configuration path prefixers
"""
import os
import platform
from abc import ABCMeta, abstractmethod
from xdg import BaseDirectory
from leap.common.check import leap_assert
class Prefixer:
"""
Abstract prefixer class
"""
__metaclass__ = ABCMeta
@abstractmethod
def get_path_prefix(self, standalone=False):
"""
Returns the platform dependant path prefixer
@param standalone: if True it will return the prefix for a
standalone application. Otherwise, it will return the system
default for configuration storage.
@type standalone: bool
"""
return ""
def get_platform_prefixer():
prefixer = globals()[platform.system() + "Prefixer"]
leap_assert(prefixer, "Unimplemented platform prefixer: %s" %
(platform.system(),))
return prefixer()
class LinuxPrefixer(Prefixer):
"""
Config prefixer for the Linux platform
"""
def get_path_prefix(self, standalone=False):
"""
Returns the platform dependant path prefixer.
This method expects an env variable named LEAP_CLIENT_PATH if
standalone is used.
@param standalone: if True it will return the prefix for a
standalone application. Otherwise, it will return the system
default for configuration storage.
@type standalone: bool
"""
config_dir = BaseDirectory.xdg_config_home
if not standalone:
return config_dir
return os.getenv("LEAP_CLIENT_PATH", config_dir)
if __name__ == "__main__":
try:
abs_prefixer = Prefixer()
except Exception as e:
assert isinstance(e, TypeError), "Something went wrong"
print "Abstract Prefixer class is working as expected"
linux_prefixer = LinuxPrefixer()
print linux_prefixer.get_path_prefix(standalone=True)
print linux_prefixer.get_path_prefix()
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