Organize and rename a folder of mp3s by album and title

organize_mp3s.rb

# usage:
# ruby organize_mp3s.rb /path/to/mp3/directory/

require 'shellwords'

def clean filename
  return "" unless filename
  filename.gsub(/[^0-9A-Za-z.\- ]/, '_')
end

Dir.glob(File.join(ARGV.first, "*").each{|path|
  info = `id3info #{path.shellescape}`.unpack("C*").pack("U*")

  if info.include?("TIT2")
    id3 = Hash[info.scan(/^=== ([^ ]+).*\: (.+)$/)]
    title = id3["TIT2"]
    album = id3["TALB"]
    track = id3["TRCK"]

    destination = "#{clean album}/#{clean track}. #{clean title}#{File.extname(path)}"
    destination = File.join(File.dirname(path), destination)
    `mkdir -p #{File.dirname(destination).shellescape}`
    `mv #{path.shellescape} #{destination.shellescape}`
  end
}