inline coffeescript in HAML with :coffee and on-the-fly compilation

inline coffee haml watcher.rb

# inline coffeescript for haml with on-the-fly compilation
# run this script in the directory of your project

require 'fssm'
#required for using inline :coffee tag with HAML-
require 'coffee-filter'

directory = File.dirname(__FILE__)
  FSSM.monitor(directory, '**/*') do
  update do |base, relative|
    if relative.match(/.coffee\z/)
      input = "#{base}/#{relative}"
      output = "#{base}/#{relative.gsub!('.coffee', '.js')}"
      command = "coffee -c #{input}"
      %x{#{command}}
      puts "[COFFEE] Regenerated #{input} to #{output}"
    elsif relative.match(/.haml\z/)
      input = "#{base}/#{relative}"
      output = "#{base}/#{relative.gsub!('.haml', '')}"
      command = "haml -r coffee-filter #{input} #{output}"
      %x{#{command}}
      puts "[HAML] Regenerated #{input} to #{output}"
    end
  end
end