# File lib/heroku/helpers.rb, line 43
    def confirm_command(app = app)
      if extract_option('--force')
        display("Warning: The --force switch is deprecated, and will be removed in a future release. Use --confirm #{app} instead.")
        return true
      end

      raise(Heroku::Command::CommandFailed, "No app specified.\nRun this command from app folder or set it adding --app <app name>") unless app

      confirmed_app = extract_option('--confirm', false)
      if confirmed_app
        unless confirmed_app == app
          raise(Heroku::Command::CommandFailed, "Confirmed app #{confirmed_app} did not match the selected app #{app}.")
        end
        return true
      else
        display ""
        display " !    WARNING: Potentially Destructive Action"
        display " !    This command will affect the app: #{app}"
        display " !    To proceed, type \"#{app}\" or re-run this command with --confirm #{app}"
        display ""
        display "> ", false
        if ask.downcase != app
          display " !    Input did not match #{app}. Aborted."
          false
        else
          true
        end
      end
    end