unsupported alert for robot selection

endpoints/api/trigger.py

@@ -373,6 +373,10 @@ class BuildTriggerAnalyze(RepositoryParamResource):
         'status': 'error',
         'message': rre.message
       }
+    except NotImplementedError:
+      return {
+        'status': 'notimplemented',
+      }
 
     raise NotFound()
 

endpoints/trigger.py

@@ -66,14 +66,14 @@ class BuildTrigger(object):
     """
     Returns the URL at which the Dockerfile for the trigger is found or None if none/not applicable.
     """
-    return None
+    raise NotImplementedError
 
   def load_dockerfile_contents(self, auth_token, config):
     """
     Loads the Dockerfile found for the trigger's config and returns them or None if none could
     be found/loaded.
     """
-    return None
+    raise NotImplementedError
 
   def list_build_sources(self, auth_token):
     """