Add a rubocop rule to check if a method 'redirect_to' is used without explicitly set 'status' in 'destroy' actions of controllers31840-add-a-rubocop-that-forbids-redirect_to-inside-a-controller-destroy-action-without-an-explicit-status

2 files changed, 45 insertions, 0 deletions

diff --git a/rubocop/cop/redirect_with_status.rb b/rubocop/cop/redirect_with_status.rb
new file mode 100644
index 00000000000..36810642c88
--- /dev/null
+++ b/rubocop/cop/redirect_with_status.rb
@@ -0,0 +1,44 @@
+module RuboCop
+  module Cop
+    # This cop prevents usage of 'redirect_to' in actions 'destroy' without specifying 'status'.
+    # See https://gitlab.com/gitlab-org/gitlab-ce/issues/31840
+    class RedirectWithStatus < RuboCop::Cop::Cop
+      MSG = 'Do not use "redirect_to" without "status" in "destroy" action'.freeze
+
+      def on_def(node)
+        return unless in_controller?(node)
+        return unless destroy?(node) || destroy_all?(node)
+
+        node.each_descendant(:send) do |def_node|
+          next unless redirect_to?(def_node)
+
+          methods = []
+
+          def_node.children.last.each_node(:pair) do |pair|
+            methods << pair.children.first.children.first
+          end
+
+          add_offense(def_node, :selector) unless methods.include?(:status)
+        end
+      end
+
+      private
+
+      def in_controller?(node)
+        node.location.expression.source_buffer.name.end_with?('_controller.rb')
+      end
+
+      def destroy?(node)
+        node.children.first == :destroy
+      end
+
+      def destroy_all?(node)
+        node.children.first == :destroy_all
+      end
+
+      def redirect_to?(node)
+        node.children[1] == :redirect_to
+      end
+    end
+  end
+end
diff --git a/rubocop/rubocop.rb b/rubocop/rubocop.rb
index 17d2bf6aa1c..22815090508 100644
--- a/rubocop/rubocop.rb
+++ b/rubocop/rubocop.rb
@@ -1,6 +1,7 @@
 require_relative 'cop/custom_error_class'
 require_relative 'cop/gem_fetcher'
 require_relative 'cop/activerecord_serialize'
+require_relative 'cop/redirect_with_status'
 require_relative 'cop/migration/add_column'
 require_relative 'cop/migration/add_column_with_default_to_large_table'
 require_relative 'cop/migration/add_concurrent_foreign_key'