ignorar directorios de jekyll durante el desarrollo

app/models/site.rb

@@ -337,7 +337,8 @@ class Site
     # entre sitios incluso
     config = ::Jekyll.configuration('source' => path,
       'destination' => File.join(path, '_site'),
-      'safe' => true)
+      'safe' => true,
+      'watch' => false)
 
     # No necesitamos cargar plugins en este momento
     %w[plugins gems theme].each do |unneeded|

config/spring.rb

@@ -1,3 +1,11 @@
+# https://github.com/thoughtbot/ember-cli-rails/issues/479#issuecomment-241302961
+Spring::Watcher::Listen.class_eval do
+  def base_directories
+    %w(app config db lib test vendor)
+      .uniq.map { |path| Pathname.new(File.join(root, path)) }
+  end
+end
+
 %w(
   .ruby-version
   .rbenv-vars