# File lib/heroku/commands/base.rb, line 21
    def extract_app(force=true)
      app = extract_option('--app', false)
      raise(CommandFailed, "You must specify an app name after --app") if app == false
      unless app
        app = extract_app_in_dir(Dir.pwd) ||
        raise(CommandFailed, "No app specified.\nRun this command from app folder or set it adding --app <app name>") if force
        @autodetected_app = true
      end
      app
    end