#!/bin/env python

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

 # ------------------------------------------------------------

 # environment.py

 # 

 # pick some current environment infos

 #

 # Autor: Oliver Maurhart, <oliver.maurhart@ait.ac.at>

 #

 # Copyright (C) 2013 AIT Austrian Institute of Technology

 # AIT Austrian Institute of Technology GmbH

 # Donau-City-Strasse 1 | 1220 Vienna | Austria

 # http://www.ait.ac.at

 #

 # 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 version 2.

 # 

 # 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.

 # ------------------------------------------------------------

 # ------------------------------------------------------------

 # imports

 import os

 import os.path

 import sys

 # ------------------------------------------------------------

 # code

 class Environment(object):

     """Hold some nifty environment stuff in a dedicated class."""

     def __init__(self, application = None):

         # if we ain't got a path to start from, all is valid/lost

         if len(sys.path[0]) == 0:

             self.prefix_path = ''

             self.data_path = ''

             self.image_path = ''

             return

         # the prefix path

         #

         # - on Linux: this is ../../ to the current executable

         #   e.g. "/usr/bin/myprogram" --> "/usr"

         #

         # - on Windows: this is the installation folder

         #   e.g. "C:/Program Files/MyProgram/bin/myprogam" --> "C:/Program Files/MyProgram"

         #

         if sys.platform == 'linux2':

             self.prefix_path = os.path.split(sys.path[0])[0]

         elif sys.platform == 'win32':

             self.prefix_path = os.path.split(sys.path[0])[0]

         # the data path where all data files are stored

         if sys.platform == 'linux2':

             if not application is None:

                 self.data_path = os.path.join(self.prefix_path, os.path.join('share', application))

             else:

                 self.data_path = os.path.join(self.prefix_path, 'share')

         elif sys.platform == 'win32':

             self.data_path = self.prefix_path

         # the image path 

         if sys.platform == 'linux2':

             self.image_path = os.path.join(self.data_path, 'gfx')

         elif sys.platform == 'win32':

             self.image_path = os.path.join(self.data_path, 'gfx')

 # test the module

 def test():

     """Module test call."""

     e = Environment("opensecurity")

     print("prefix_path: {0}".format(e.prefix_path))

     print("  data_path: {0}".format(e.data_path))

     print(" image_path: {0}".format(e.image_path))

 # standalone calls are module tests

 if __name__ == '__main__':

     test()