# File lib/heroku/command/base.rb, line 149
  def extract_app
    if options[:app].is_a?(String)
      options[:app]
    elsif app_from_dir = extract_app_in_dir(Dir.pwd)
      app_from_dir
    else
      raise Heroku::Command::CommandFailed, "No app specified.\nRun this command from an app folder or specify which app to use with --app <app name>"
    end
  end