A simple import *.rb File Gem for Sinatra(Ruby) (Also, 'importRuby' Gem Can be used in normally Ruby Project)
gem 'importRuby'
bundle install
and then, write
#./config.ru
require 'ImportRuby'
ImportRuby.require_all('controller')
example_path : https://github.com/xhdtn8070/importRuby_example