Allow disabling plugins for faster preview

_plugins/redirects.rb

@@ -22,6 +22,13 @@ module Jekyll
 
   class RedirectPageGenerator < Generator
     def generate(site)
+
+      #Do nothing if plugin is disabled
+      if !ENV['ENABLED_PLUGINS'].nil? and ENV['ENABLED_PLUGINS'].index('redirects').nil?
+        print 'Redirects disabled' + "\n"
+        return
+      end
+
       #Load redirections
       redirects = YAML.load_file("_config.yml")['redirects']
       #Generate each redirection page