1 files changed, 10 insertions, 1 deletions
diff --git a/app/services/ci/external_pull_requests/create_pipeline_service.rb b/app/services/ci/external_pull_requests/create_pipeline_service.rb
index 78be94bfb41..83499524a8e 100644
--- a/app/services/ci/external_pull_requests/create_pipeline_service.rb
+++ b/app/services/ci/external_pull_requests/create_pipeline_service.rb
@@ -7,7 +7,8 @@ module Ci
   module ExternalPullRequests
     class CreatePipelineService < BaseService
       def execute(pull_request)
-        return unless pull_request.open? && pull_request.actual_branch_head?
+        return pull_request_not_open_error unless pull_request.open?
+        return pull_request_branch_error unless pull_request.actual_branch_head?
 
         create_pipeline_for(pull_request)
       end
@@ -26,6 +27,14 @@ module Ci
           target_sha: pull_request.target_sha
         }
       end
+
+      def pull_request_not_open_error
+        ServiceResponse.error(message: 'The pull request is not opened', payload: nil)
+      end
+
+      def pull_request_branch_error
+        ServiceResponse.error(message: 'The source sha is not the head of the source branch', payload: nil)
+      end
     end
   end
 end