find_unused_css.rb

found = %w(html body h1 h2 h3 h4 h5 h6 a ul ol li p div i b strong em)
not_found = []

File.read('app/stylesheets/common.sass').each do |line|
  next if line =~ /^[\s|@|\/]/
  elements = line.strip.split(/[^\w\-_]/).reject{|l| l==''}.reject{|l| found.include?(l) || not_found.include?(l)}
  elements.each do |element|
    result = `ack-grep #{element} --nocss`
    if result.length>0
      puts element
      found << element
    else
      puts "#{element} == not found =="
      not_found << element
      File.open('not_found.txt','w') {|f| f.puts not_found.join("\n")}
    end
  end
end