Sick of messing with crappy MP3 renaming/tagging/reorganizing tools for such a simple task.

mp3_organize.rb

require 'find'
require 'mp3info'

class ArtistsHash < Hash
  def initialize
    super
    self.default_proc = proc do |h, artist_name|
      h[artist_name] = AlbumsHash.new
    end
  end
  
  def inspect
    "ArtistsHash: #{super.inspect}"
  end
end

class AlbumsHash < Hash
  def initialize
    super
    self.default_proc = proc do |h, album_name|
      h[album_name] = Album.new
    end
  end

  def inspect
    "AlbumsHash: #{super.inspect}"
  end
end

class Album < Array
  def inspect
    "Album: #{super.inspect}"
  end
end

class Mp3
  DIRECTORY = ARGV.first #"/mnt/hgfs/R/music/2012-01-12 what.cd free leech mostly bluegrass"

  def self.do
    artists = ArtistsHash.new
    skipped_files = []
    count = 0

    Find.find(DIRECTORY) do |file|
      unless file =~ /\.mp3$/
        skipped_files << file
        next
      end
      next if file =~ /NEW COPY/
      
      begin
        Mp3Info.open(file) do |m|
          artist = m.tag.artist
          album = m.tag.album
          track_title = m.tag.title

          next if album =~ /Anthology of American Folk Music/
      
          if artist && album && track_title
            p [artist, album] if artists[artist][album].empty?
            artists[artist][album] << track_title
            count += 1
          else
            skipped_files << file
          end
    
          if count % 100 == 0
            puts "===== DONE #{count.to_s.rjust 5}, skipped #{skipped_files.size.to_s.rjust 5}"
          end
        end
      rescue
        puts " ! !! EXCEPTION: #{file[DIRECTORY.size..-1]}"
      end
    end
    return artists, skipped_files
  end
end

if __FILE__ == $PROGRAM_NAME
  Mp3.do
end