module_loader: extension_name clearer and works with variable extensi…

…on path

common/lib/module_loader.py

@@ -116,6 +116,7 @@ def load_modules(self):
                 # determine module name for file
                 # reduce path to be relative to 4CAT root
                 module_name = ".".join(file.parts[len(root_path.parts):-1] + (file.stem,))
+                extension_name = file.parts[len(extension_path.parts):][0] if is_extension else None
 
                 # check if we've already loaded this module
                 if module_name in self.ignore:
@@ -125,7 +126,7 @@ def load_modules(self):
                     # This skips processors/datasources that were loaded by others and may not yet be captured
                     pass
 
-                if is_extension and len(module_name.split(".")) > 1 and module_name.split(".")[1] not in enabled_extensions:
+                if is_extension and len(module_name.split(".")) > 1 and extension_name not in enabled_extensions:
                     continue
 
                 # try importing
@@ -157,7 +158,7 @@ def load_modules(self):
                     self.workers[component[1].type].filepath = relative_path
                     self.workers[component[1].type].is_extension = is_extension
                     if is_extension:
-                        self.workers[component[1].type].extension_name = module_name.split(".")[1]
+                        self.workers[component[1].type].extension_name = extension_name
 
                     # we can't use issubclass() because for that we would need
                     # to import BasicProcessor, which would lead to a circular