1  Dir.glob("**/*.{jpg,gif,jpeg,png}").sort.each do |image|
   2  
   3    name   = File.basename(image)
   4    in_use = false
   5    
   6    Dir.glob("**/*.{erb,css,js,html,htm}").each do |file|
   7      contents = File.read(file)
   8  
   9      in_use = contents.include?(name)
  10      
  11      break if in_use
  12    end
  13  
  14    if !in_use
  15      puts "Deleting '#{image}'"
  16      File.delete(image)
  17    end
  18  end