pry--pry/lib/pry/commands/pry_backtrace.rb

class Pry
  Pry::Commands.create_command "pry-backtrace" do
    group 'Context'
    description "Show the backtrace for the Pry session."

    banner <<-BANNER
      Usage:   pry-backtrace [OPTIONS] [--help]

      Show the backtrace for the position in the code where Pry was started. This can be used to
      infer the behavior of the program immediately before it entered Pry, just like the backtrace
      property of an exception.

      (NOTE: if you are looking for the backtrace of the most recent exception raised,
      just type: `_ex_.backtrace` instead, see https://github.com/pry/pry/wiki/Special-Locals)

      e.g: pry-backtrace
    BANNER

    def process
      output.puts "\n#{text.bold('Backtrace:')}\n--\n"
      stagger_output _pry_.backtrace.join("\n")
    end
  end
end