modules loader

weboob/modules.py

@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+
+"""
+Copyright(C) 2010  Romain Bignon
+
+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 3 of the License.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+"""
+
+import re
+import os
+import sys
+from logging import warning
+
+import weboob.backends as backends
+
+class Backend:
+    def __init__(self, name, module):
+        self.name = name
+        self.module = module
+
+class ModulesLoader:
+    def __init__(self):
+        self.modules = {}
+
+    def load(self):
+        path = backends.__path__[0]
+        regexp = re.compile('^%s/([\w\d_]+)$' % path)
+        for root, dirs, files in os.walk(path):
+            m = regexp.match(root)
+            if m and '__init__.py' in files:
+                self.load_module('weboob.backends.%s' % m.group(1))
+
+    def load_module(self, name):
+        try:
+            backend = Backend(name, __import__(name, fromlist=[name]))
+        except ImportError:
+            warning('Unable to import %s (%s)' % (name, path))
+            raise
+            return
+        if name in self.modules:
+            warning('Module "%s" is already loaded (%s)' % self.modules[name].module)
+            return
+        self.modules[name] = backend
+        print 'Loaded module %s (%s)' % (name, backend.module.__name__)