My script for copying and compressing music from an archive to a listening device

music.rb

#!/usr/bin/env ruby

# Run from the destination root (somedevice/music/):
# .../music.rb audiosource/artist1/album1 audiosource/artist2/album2 ...

require 'fileutils'

ARGV.each do |dir|
  dir = File.absolute_path(dir)
  album = File.basename(dir)
  artist = File.basename(File.dirname(dir))
  dest = "#{artist}/#{album}/"
  FileUtils.mkdir_p dest
  Dir.entries(dir).each do |f|
    case File.extname(f)
    when '.mp3', '.ogg'
      FileUtils.cp "#{dir}/#{f}", "#{artist}/#{album}/#{f}"
    when '.flac'
      ogg = f.clone
      ogg['.flac'] = '.ogg'
      `sox "#{dir}/#{f}" -C 5.5 "#{dest}/#{ogg}" rate 44100`
    else
      if File.basename(f, '.*').downcase == 'cover'
        FileUtils.cp "#{dir}/#{f}", "#{artist}/#{album}/#{f}"
      end
    end
  end
end