systematiki.py

   1 #!/usr/bin/env python
   2 # -*- coding: utf-8 -*-
   3 """
   4 Systematiki program.
   5
   6 This program is a command-line-driven module loader for Systematiki.  It
   7 provides for running any combination of one Systematiki front-end and one
   8 back-end.
   9 """
  10
  11 # Copyright 2007 Felix Rabe
  12
  13 # This file is part of Systematiki.
  14
  15 # Systematiki is free software; you can redistribute it and/or modify it
  16 # under the terms of the GNU Lesser General Public License as published by
  17 # the Free Software Foundation; either version 3 of the License, or (at
  18 # your option) any later version.
  19
  20 # Systematiki is distributed in the hope that it will be useful, but
  21 # WITHOUT ANY WARRANTY; without even the implied warranty of
  22 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser
  23 # General Public License for more details.
  24
  25 # You should have received a copy of the GNU Lesser General Public License
  26 # along with Systematiki.  If not, see <http://www.gnu.org/licenses/>.
  27
  28 import imp
  29 import sys
  30
  31
  32 usage = """Usage:
  33   systematiki.py --back Back.End ... --front Front.End ..."""
  34
  35
  36 def load_module(module_name):
  37     path = sys.path
  38     components = module_name.split(".")
  39     fn = []
  40     for x in components[:-1]:
  41         fn = [".".join(fn + [x])]
  42         path = imp.load_module(fn[0], *imp.find_module(x, path)).__path__
  43     x = components[-1]
  44     fn = [".".join(fn + [x])]
  45     return imp.load_module(fn[0], *imp.find_module(x, path))
  46
  47
  48 def main(argv):
  49     try:
  50         assert argv[1] == "--back"
  51         backend_name = argv[2]
  52         i = argv.index("--front", 3)
  53         backend_options = argv[3:i]
  54         frontend_name = argv[i+1]
  55         frontend_options = argv[i+2:]
  56     except:
  57         print usage
  58         return 1
  59
  60     backend_module = load_module(backend_name)
  61     frontend_module = load_module(frontend_name)
  62
  63     backend_instance = backend_module.SystBack(*backend_options)
  64     frontend_instance = frontend_module.SystFront(*frontend_options)
  65
  66     frontend_instance.set_back(backend_instance)
  67     backend_instance.set_front(frontend_instance)
  68
  69
  70 if __name__ == "__main__":
  71     sys.exit(main(sys.argv))
  72