Source Code for Module slum.includes

 1  # 
 2  # includes.py - adds .hslum extension to python import mechanism, allowing 
 3  #                               templates to just use import to import .hslum includes 
 4  # 
 5  #    Copyright (C) 2008 - Roberto Hradec 
 6  # 
 7  # --------------------------------------------------------------------------- 
 8  #        This file is part of SLUM. 
 9  # 
10  #    SLUM is free software: you can redistribute it and/or modify 
11  #    it under the terms of the GNU General Public License as published by 
12  #    the Free Software Foundation, either version 3 of the License, or 
13  #    (at your option) any later version. 
14  # 
15  #    SLUM is distributed in the hope that it will be useful, 
16  #    but WITHOUT ANY WARRANTY; without even the implied warranty of 
17  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
18  #    GNU General Public License for more details. 
19  # 
20  #    You should have received a copy of the GNU General Public License 
21  #    along with SLUM.  If not, see <http://www.gnu.org/licenses/>. 
22  # --------------------------------------------------------------------------- 
23   
24  import sys,  marshal 
25  VER = sys.hexversion 
26   
27  debug = 0 
28   
29 -class DBmodule(type(sys)): 
30 -    def __repr__(self): 
31          return "<DBmodule '%s' originally from '%s'>" % (self.__name__, self.__file__) 
32   
33   
34   
35 -class hslumImporter(object): 
36   
37 -        def __init__(self, item, *args, **kw): 
38                  print 'init',item, args, kw 
39                  ''' 
40                  if item != "*db*": 
41                          raise ImportError 
42                  if debug: 
43                          print "dbimporter: item:", id(self), item, "args:", args, "keywords:", kw 
44                          print "Accepted", item 
45                  ''' 
46   
47 -        def find_module(self, fullname, path=None): 
48                  print 'find_module',fullname, path 
49                  ''' 
50                  if debug: 
51                          print "%x: find_module: %s from %s" % (id(self), fullname, path) 
52                  if fullname not in impdict: 
53                          if debug: 
54                                  print "Bailed on", fullname 
55                          return None 
56                  else: 
57                          if debug: 
58                                  print "found", fullname, "in db" 
59                          return self 
60                  ''' 
61   
62 -        def load_module(self, modname): 
63                  print 'load_module' 
64                  if debug: 
65                          print "%x: load_module: %s" % (id(self), modname) 
66   
67                  # return it if already loaded 
68                  if modname in sys.modules: 
69                          return sys.modules[modname] 
70   
71                  # load it 
72                  if False: 
73                          raise ImportError, "DB module %s not found in modules" 
74   
75                  code, package, path = ("","","") 
76                  code = marshal.loads(code) 
77                  module = DBmodule(modname) 
78                  sys.modules[modname] = module 
79                  module.__name__ = modname 
80                  module.__file__ = path # was "db:%s" % modname 
81                  module.__loader__ = self 
82                  if package: 
83                          module.__path__ = ["*db*"] 
84                  exec code in module.__dict__ 
85                  if debug: 
86                          print modname, "loaded:", module, "pkg:", package 
87   
88                  return module 
89   
90   
91 -def install(): 
92      sys.path_hooks.append(hslumImporter) 
93      sys.path_importer_cache.clear() # probably not necessary 
94      sys.path.insert(0, "*db*") # probably not needed with a metea-path hook? 
95