big change n parsing logic passing

lib/services/shell.py

@@ -6,13 +6,21 @@ from service import Service
 
 
 class ShellService(Service):
-    def __init__(self, parser, log, **kwargs):
-        super(Service, self).__init__(parser)
-        if "command" in kwargs:
-            self.command = kwargs["command"]
+    def __init__(self, **kwargs):
+        super(ShellService, self).__init__(**kwargs)
+        
+        args = self.get_arguments()
+        if "command" in args:
+            self.command = args["command"] 
         else:
-            log.w("There is no command")
-            raise
+            raise Exception("There is no command argument")
+        
+    def needs_arguments(self):
+        return True 
+    
 
     def execute(self):
-        self.command.call()
+        self.command.call()
+        
+def create(**kwargs):
+    return ShellService(**kwargs)