Hack in a rule_dir field. Need to redo how config works...

hancho.py

@@ -463,12 +463,16 @@ def __init__(self, **kwargs):
         super().__init__(self)
         self.base = None
         self |= kwargs
+        if config is not None and self.rule_dir is None:
+            self.rule_dir = relpath(
+                Path(inspect.stack(context=0)[1].filename).parent, self.root_dir
+            )
 
     def __missing__(self, key):
         if self.base:
             # Why does this trigger pylint?
             return self.base[key]  # pylint: disable=unsubscriptable-object
-        if id(self) != id(config):
+        if config is not None and id(self) != id(config):
             return config[key]
         return None
 
@@ -566,7 +570,6 @@ async def run_async(self):
             if self.debug:
                 log("")
 
-
     ########################################
 
     async def task_main(self):