brew/Library/Homebrew/cask/lib/hbc/dsl/base.rb

class Hbc::DSL::Base
  extend Forwardable

  def initialize(cask, command = Hbc::SystemCommand)
    @cask = cask
    @command = command
  end

  def_delegators :@cask, :token, :version, :caskroom_path, :staged_path, :appdir

  def system_command(executable, options = {})
    @command.run!(executable, options)
  end

  def method_missing(method, *)
    if method
      underscored_class = self.class.name.gsub(%r{([[:lower:]])([[:upper:]][[:lower:]])}, '\1_\2').downcase
      section = underscored_class.downcase.split("::").last
      Hbc::Utils.method_missing_message(method, @cask.to_s, section)
      nil
    else
      super
    end
  end

  def respond_to_missing?(*)
    true
  end
end