Extract EE-specific code from app/services/commits/create_service.rb

app/services/commits/create_service.rb

 module Commits
   class CreateService < ::BaseService
+    prepend EE::Commits::CreateService
+
     ValidationError = Class.new(StandardError)
     ChangeError = Class.new(StandardError)
 
@@ -37,7 +39,6 @@ module Commits
 
     def validate!
       validate_permissions!
-      validate_repository_size!
       validate_on_branch!
       validate_branch_existance!
 
@@ -52,12 +53,6 @@ module Commits
       end
     end
 
-    def validate_repository_size!
-      if project.above_size_limit?
-        raise_error(Gitlab::RepositorySizeError.new(project).commit_error)
-      end
-    end
-
     def validate_on_branch!
       if !@start_project.empty_repo? && !@start_project.repository.branch_exists?(@start_branch)
         raise_error('You can only create or edit files when you are on a branch')

ee/app/services/ee/commits/create_service.rb

+module EE
+  module Commits
+    module CreateService
+      extend ::Gitlab::Utils::Override
+
+      private
+
+      override :validate!
+      def validate!
+        super
+
+        validate_repository_size!
+      end
+
+      def validate_repository_size!
+        if project.above_size_limit?
+          raise_error(Gitlab::RepositorySizeError.new(project).commit_error)
+        end
+      end
+    end
+  end
+end