add_shebang_option!

# File railties/lib/rails/generators/base.rb, line 346
        def self.add_shebang_option!
          class_option :ruby, type: :string, aliases: "-r", default: Thor::Util.ruby_command,
                              desc: "Path to the Ruby binary of your choice", banner: "PATH"

          no_tasks {
            define_method :shebang do
              @shebang ||= begin
                command = if options[:ruby] == Thor::Util.ruby_command
                  "/usr/bin/env #{File.basename(Thor::Util.ruby_command)}"
                else
                  options[:ruby]
                end
                "#!#{command}"
              end
            end
          }
        end