    # File lib/chef/knife/cookbook_site_download.rb, line 38
          def run
            current = noauth_rest.get_rest("http://cookbooks.opscode.com/api/v1/cookbooks/#{name_args[0]}")
            if current["deprecated"] == true
              replacement = File.basename(current["replacement"])
              ui.warn("DEPRECATION: This cookbook has been deprecated. It has been replaced by #{replacement}.")
              unless config[:force]
                ui.warn("Use --force to force download deprecated cookbook.")
                return
              end
            end
            cookbook_data = if @name_args.length == 1
                              noauth_rest.get_rest(current["latest_version"])
                            else
                              noauth_rest.get_rest("http://cookbooks.opscode.com/api/v1/cookbooks/#{name_args[0]}/versions/#{name_args[1].gsub('.', '_')}")
                            end

            @version = cookbook_data['version']
            unless config[:file]
              config[:file] = File.join(Dir.pwd, "#{@name_args[0]}-#{cookbook_data['version']}.tar.gz")
            end
            ui.info("Downloading #{@name_args[0]} from the cookbooks site at version #{cookbook_data['version']} to #{config[:file]}")
            noauth_rest.sign_on_redirect = false
            tf = noauth_rest.get_rest(cookbook_data["file"], true)

            FileUtils.cp(tf.path, config[:file])
            ui.info("Cookbook saved: #{config[:file]}")
          end