Script to add ID3 tags to .mp3 files for my car

music-editor.rb

require 'id3tag'
require 'pathname'
require 'fileutils'

MUSIC_FOLDER = Pathname.new('./music')

# Get all MP3 files.
songs = Dir.entries(MUSIC_FOLDER).select { |song| song.end_with? '.mp3' }

# Read each file ID3 tag.
songs.each do |song|
  File.open MUSIC_FOLDER + song do |mp3|
    # Split song into two parts: artist and title.
    artist, title = song.sub('.mp3', '').split ' - '
    # Normalize both parts.
    artist.strip!
    title.strip!

    # Read each MP3 file meta info.
    ID3Tag.read(mp3) do |tag|
      puts "Artist: #{tag.artist} | Title: #{tag.title}"
    end

    system("id3tag --song='#{title}' --artist='#{artist}' '#{MUSIC_FOLDER + song}'")
  end
end