Checksum directory of DVD images

sum_dvd_media.rb

def each_file(root, &block)
  Dir.foreach(root) do |entry|
    next if entry.start_with?(".")

    entry = File.join(root, entry)

    if File.file?(entry)
      block.call(entry)
    else
      each_file(entry, &block)
    end
  end

  nil
end


Dir.foreach(".") do |entry|
  next unless entry.end_with?(".dvdmedia")

  sum = ""
  each_file(entry) do |file|
    sum << IO.popen("shasum \"#{file}\"").read.split.first
  end

  puts "#{entry} => #{sum.hash}"
end