1 files changed, 10 insertions, 0 deletions
diff --git a/lib/gitlab/git/repository.rb b/lib/gitlab/git/repository.rb
index 59a54b48ed9..95265b41878 100644
--- a/lib/gitlab/git/repository.rb
+++ b/lib/gitlab/git/repository.rb
@@ -745,6 +745,16 @@ module Gitlab
         nil
       end
 
+      def ff_merge(user, source_sha, target_branch)
+        OperationService.new(user, self).with_branch(target_branch) do |our_commit|
+          raise ArgumentError, 'Invalid merge target' unless our_commit
+
+          source_sha
+        end
+      rescue Rugged::ReferenceError
+        raise ArgumentError, 'Invalid merge source'
+      end
+
       def revert(user:, commit:, branch_name:, message:, start_branch_name:, start_repository:)
         OperationService.new(user, self).with_branch(
           branch_name,