album_list.rb

file = ARGV.shift || "~/Music/iTunes/iTunes Music Library.xml"

albums = []
d = {}
IO.foreach(File.expand_path(file)) do |line|
  if line =~ /<dict/
    d.clear
  elsif line =~ /<key>(Artist|Album)<\/key><.*?>(.*)<\/.*?>/
    key = $1.downcase.first.intern
    d[key] = $2
  elsif line =~ /<\/dict>/ && d.size == 2
    albums << "#{d[:artist]} - #{d[:album]}"
  end
end

puts albums.uniq.sort