BuildBucket-based build triggering

scripts/master/buildbucket/client.py

Index: scripts/master/buildbucket/client.py
diff --git a/scripts/master/buildbucket/client.py b/scripts/master/buildbucket/client.py
index 7db82ce711c4128c27548af781272cae71c033d5..edeb7ead8e6bb5e084afd8b478dc23772352a662 100644
--- a/scripts/master/buildbucket/client.py
+++ b/scripts/master/buildbucket/client.py
@@ -25,6 +25,13 @@ def buildbucket_api_discovery_url(hostname=None):
   return (
       'https://%s/_ah/api/discovery/v1/apis/{api}/{apiVersion}/rest' % hostname)
 
+
+def get_default_buildbucket_hostname(master):
+  return (
+      BUILDBUCKET_HOSTNAME_PRODUCTION if master.is_production_host
+      else BUILDBUCKET_HOSTNAME_TESTING)
+
+
 def create_buildbucket_service(
     master, hostname=None, verbose=None):
   """Asynchronously creates buildbucket API resource.
@@ -32,9 +39,7 @@ def create_buildbucket_service(
   Returns:
     A DeferredResource as Deferred.
   """
-  hostname = hostname or (
-      BUILDBUCKET_HOSTNAME_PRODUCTION if master.is_production_host
-      else BUILDBUCKET_HOSTNAME_TESTING)
+  hostname = hostname or get_default_buildbucket_hostname(master)
   return DeferredResource.build(
       'buildbucket',
       'v1',