My hacked together ruby code to combine several mp3 audiobook chapters files into one file

combine_mp3_files.rb

#!/bin/ruby
 
require 'find'
require 'fileutils'
 
def combine_mp3_files(final_mp3)
  `rm #{final_mp3}`
  files = []
  Find.find('.') do |path|
    if FileTest.file?(path)
      if File.basename(path).include? ".mp3"
        #puts path
        files << path
      end
    end
  end
  files.sort!
  files.each do |file|
    puts "#{file}"
    `cat "#{file}" >> #{final_mp3}`
  end
end
 
combine_mp3_files('my_big_file.mp3')