JS embedding

application.html.haml

!!!
%html{ "xmlns" => "http://www.w3.org/1999/xhtml", "xml:lang" => "en", "lang" => "en" }
  %head
    %meta{ "http-equiv" => "content-type", "content" => "text/html;charset=UTF-8" }

    -# snip

    = stylesheet_link_tag    @additional_styles if @additional_styles
    = javascript_include_tag @additional_scripts if @additional_scripts

application_helper.rb

# Methods added to this helper will be available to all templates in the application.
module ApplicationHelper
  # Adds stylesheets
  def stylesheet(*names)
    @additional_styles = (names + (@additional_styles || [])).uniq unless names.blank?
  end

  # Adds javascript files
  def javascript(*names)
    @additional_scripts = (names + (@additional_scripts || [])).uniq unless names.blank?
  end
end

sample.html.haml

- stylesheet "admin/keywords", "admin/..."
- javascript "admin/keywords", "jquery-..."