1 files changed, 18 insertions, 0 deletions
diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 9a7e66a9cbb..59fd2d4e4a0 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -1087,4 +1087,22 @@ class MergeRequest < ActiveRecord::Base
 
     project.merge_requests.merged.where(author_id: author_id).empty?
   end
+
+  def allow_maintainer_to_push
+    maintainer_push_possible? && super
+  end
+
+  alias_method :allow_maintainer_to_push?, :allow_maintainer_to_push
+
+  def maintainer_push_possible?
+    source_project.present? && for_fork? &&
+      target_project.visibility_level > Gitlab::VisibilityLevel::PRIVATE &&
+      source_project.visibility_level > Gitlab::VisibilityLevel::PRIVATE &&
+      !ProtectedBranch.protected?(source_project, source_branch)
+  end
+
+  def can_allow_maintainer_to_push?(user)
+    maintainer_push_possible? &&
+      Ability.allowed?(user, :push_code, source_project)
+  end
 end