It's already async, from Project#execute_services, feedback:

https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6342/diffs#note_16132555
2016-09-30 00:12:10 +08:00 · 2016-09-30 00:12:10 +08:00 · 8dd580f402
parent c065f5360f
commit 8dd580f402
1 changed files with 1 additions and 1 deletions
--- a/app/models/project_services/pipelines_email_service.rb
+++ b/app/models/project_services/pipelines_email_service.rb
@ -32,7 +32,7 @@ class PipelinesEmailService < Service
    return unless all_recipients.any?

    pipeline_id = data[:object_attributes][:id]
-    SendPipelineNotificationWorker.perform_async(pipeline_id, all_recipients)
+    SendPipelineNotificationWorker.new.perform(pipeline_id, all_recipients)
  end

  def can_test?