Script to tag mp3 releases using the discogs webservice.

tag.rb

require 'rubygems'
require 'id3lib'
require File.join(File.dirname(__FILE__),'discogs/lib/discogs.rb')

# Script to tag mp3 releases using the discogs webservice.
# It requires the discogs gem: git://github.com/crofty/discogs.git

# Usage:
# ruby tag release_folder
# Then, when prompted, give the discogs release number

if ARGV.empty?
  puts "usage: ruby tag release_folder"
  exit
end

unless File.exist?(ARGV[0])
  puts "Invalid folder"
  exit
end

Dir.chdir(ARGV[0])
starting_dir = Dir.pwd

# The directory to move the tagged files to:
ending_dir = '/Users/jamescroft/Tagged'

# Change to the directory
Dir.chdir(starting_dir)

# Get a list of the mp3's
mp3s = Dir.new(".").find_all{|file| file =~ /.mp3/}
mp3s.each{|m| puts m}

# Ask for the discogs number
puts "Enter the discogs release number"
discogs_no = $stdin.gets.chomp

# Grab the discogs release
discogs_release = Discogs::Release.new(discogs_no)

if discogs_release.tracks.length != mp3s.length
  puts "The number of files is different"
  puts "Continue? (Y/N)"
  ans = $stdin.gets.chomp
  if ans != "Y"
    puts "Exiting"
    exit
  end
end

# Grab the image if there is one:
image_path = discogs_release.images.first.uri150 if discogs_release.images.first
`wget #{image_path} -O ./folder.jpg` if image_path

discogs_release.tracks.each_with_index do |track, i|
  tag = ID3Lib::Tag.new(mp3s[i])
  
  tag.set_frame_text(:TIT2, track.title)
  tag.set_frame_text(:TRCK, track.position)
  tag.set_frame_text(:TPE1, track.artist)
  tag.set_frame_text(:TCON, discogs_release.genres)
  tag.set_frame_text(:TYER, discogs_release.released)
  tag.set_frame_text(:TALB, discogs_release.title)
  tag.set_frame_text(:TPUB, discogs_release.labels)

  comment = "Styles: #{discogs_release.styles.join(',')}\n"
  comment << "Country: #{discogs_release.country}\n"
  comment << "Formats: #{discogs_release.formats}\n"
  comment << "Label: #{discogs_release.labels}\n"
  comment << "Cat No: #{discogs_release.catno.to_s}\n"
  comment << "Discogs ID: #{discogs_release.discog_id}\n"
  
  tag.comment = comment 
  

  if image_path
    cover = {
      :id          => :APIC,
      :mimetype    => 'image/jpeg',
      :picturetype => 3,
      :description => 'A',
      :textenc     => 0,
      :data        => File.read('folder.jpg')
    }
  
    tag << cover
  end
  tag.update!
  puts "Title:" + tag.title 
  puts "Artist:" + tag.artist
end

# Create the label folder
label_dir = File.join(ending_dir,"#{discogs_release.labels}")
Dir.mkdir( label_dir ) unless File.exists?(label_dir)

# Move the release to the label folder
File.rename(starting_dir , File.join(label_dir,"[#{discogs_release.catno.to_s}] #{discogs_release.artists.join(", ")} - #{discogs_release.title.gsub('/','-')}"))