Ruby Shuffle Files

ruby_shuffle_files.rb

# encoding: utf-8

# Ruby script to shuffle files, pass the folder name as the first argument (necessary), 
#  and -f after folder name if you want to really sort them
# example: ruby ruby_shuffle_files.rb my_folder -f

folder     = ARGV[0] + "/"
loop_times = (ARGV[1] != nil && ARGV[1] == "-f") ? 3 : 1
qtd_files  = 0

# Verify if folder isn't empty
raise "Folder can't be empty." if folder == nil

dir = Dir.open(folder)

# Count Files
dir.each do |f|
  qtd_files += 1
end

# Loop 3 times if -f is passed or 1 if not
loop_times.times do 
  # Rename Files
  dir.each do |f|
    next if f == "." || f == ".."

    ext = File.extname(f)
    random = ""
    # Check if there's not other file with the same name
    loop do
      random = rand(max=qtd_files).to_s
      break if !File.exists? folder + random + ext
    end

    new_name = random + ext
    File.rename(folder + f, folder + new_name)
  end
end

ruby_shuffle_files_md5.rb

require 'digest/md5'

path = 'musics/'

dir = Dir.new(path)

#print "There are #{dir.length} files. \n"

dir.each do |f|

  if f != "." and f != ".." then
    new_name = (rand * 10000).to_i
    new_name = new_name.to_s + Digest::MD5.hexdigest(f)[0, 8] + ".mp3"
    File.rename(path + f, path + new_name)
  end
end