Sass multiple directory watcher ruby

watcher.rb

#######
# Watches files for changes and runs a command if anything was changed.
#
# Modified from https://gist.github.com/286060
#
# Example:
# ruby watcher.rb **/*.scss "sass --update sass:compiled"
#######

trap('INT') { exit! }

cmd = ARGV.pop

files = {}
loop do
  updated = 0

  ARGV.each do |file|
    ctime = File.ctime(file).to_i

    if ctime != files[file]
      files[file] = ctime
      updated += 1
    end
  end

  if updated > 0
    puts "Detected #{updated} changed files!"
    puts "# #{cmd}"
    system(cmd)
    puts "Done!"
    trap('INT') { exit! }
  end

  sleep 5

end