Dynamically generate docs from a gem

doc.rb

require 'zlib'
require 'yard'
require 'tmpdir'
require 'stringio'
require 'fileutils'
require 'archive/tar/minitar'

io = StringIO.new File.read('sequel-4.32.0.gem')

catch :finished do
  Archive::Tar::Minitar::Input.open(io) do |entries|
    entries.each do |entry| 
      if entry.full_name == 'data.tar.gz'
        Zlib::GzipReader.wrap StringIO.new(entry.read) do |gzio|
          Dir.mktmpdir do |directory|
            Archive::Tar::Minitar.unpack gzio, directory

            Dir.chdir directory do
              YARD::CLI::Yardoc.run '-c', '--no-stats', '-o', '/Users/kyle/Desktop/BOOM'
            end

            throw :finished, true 
          end
        end
      end
    end  
  end

  raise 'could not extract files from gem!'
end