Scripts under bin directory of your Rails app

rails-bin.md

bundle

#!/usr/bin/env ruby
ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile', __FILE__)
load Gem.bin_path('bundler', 'bundle')

rails

#!/usr/bin/env ruby
APP_PATH = File.expand_path('../../config/application',  __FILE__)
require_relative '../config/boot'
require 'rails/commands'

rake

#!/usr/bin/env ruby
require_relative '../config/boot'
require 'rake'
Rake.application.run

The End