# File lib/dister/core.rb, line 240
    def package_gems
      if !File.exists?("#{APP_ROOT}/Gemfile")
        puts "Gemfile missing, cannot use bundler"
        puts 'Either create a Gemfile or use "dister package add" command'
        return
      end

      puts 'Packaging gems...'
      system "cd #{APP_ROOT}"
      system "rm -R vendor/cache" if File.exists?("#{APP_ROOT}/vendor/cache")
      success = system 'bundle package'
      unless success
        STDERR.puts "`bundle package` failed, exiting"
        exit 1
      end
      puts "Done!"
    end