1 files changed, 25 insertions, 0 deletions
diff --git a/actionview/lib/action_view/template/handlers/builder.rb b/actionview/lib/action_view/template/handlers/builder.rb
new file mode 100644
index 0000000000..61492ce448
--- /dev/null
+++ b/actionview/lib/action_view/template/handlers/builder.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+module ActionView
+  module Template::Handlers
+    class Builder
+      class_attribute :default_format, default: :xml
+
+      def call(template)
+        require_engine
+        "xml = ::Builder::XmlMarkup.new(:indent => 2);" \
+          "self.output_buffer = xml.target!;" +
+          template.source +
+          ";xml.target!;"
+      end
+
+      private
+        def require_engine # :doc:
+          @required ||= begin
+            require "builder"
+            true
+          end
+        end
+    end
+  end
+end