Move command registering to Command object

qutebrowser/api/cmdutils.py

@@ -117,14 +117,10 @@ class register:  # noqa: N801,N806 pylint: disable=invalid-name
         else:
             assert isinstance(self._name, str), self._name
             name = self._name
-        log.commands.vdebug(  # type: ignore
-            "Registering command {} (from {}:{})"
-            .format(name, func.__module__, func.__qualname__))
-        if name in objects.commands:
-            raise ValueError("{} is already registered!".format(name))
+
         cmd = command.Command(name=name, instance=self._instance,
                               handler=func, **self._kwargs)
-        objects.commands[name] = cmd
+        cmd.register()
         return func
 
 

qutebrowser/commands/command.py

@@ -521,3 +521,12 @@ class Command:
     def takes_count(self):
         """Return true iff this command can take a count argument."""
         return any(arg.count for arg in self._qute_args)
+
+    def register(self):
+        """Register this command in objects.commands."""
+        log.commands.vdebug(  # type: ignore
+            "Registering command {} (from {}:{})".format(
+                self.name, self.handler.__module__, self.handler.__qualname__))
+        if self.name in objects.commands:
+            raise ValueError("{} is already registered!".format(self.name))
+        objects.commands[self.name] = self