gistfile1.rb

class WrappedError < StandardError
  attr_reader :original_error, :message_with_original_error


  def initialize(original_error = nil)
    @original_error = original_error
  end


  def message

    @message_with_original_error ||= ""

    if original_error
      message_with_original_error <<
        " The original error was:\n\n"  <<
        dashed_line_separator           <<
        "\t" <<  original_error_message <<
         original_error_backtrace       <<
        "\n" << dashed_line_separator
    end

    message_with_original_error

  end


  private

  def dashed_line_separator
    "-" * 80 << "\n"
  end


  def original_error_backtrace
    original_error.backtrace.join("\n\t\t")
  end


  def original_error_message
    original_error.message + " at:\n\t\t"
  end

end