mysql_user with cfengine

mysql_user.cf

bundle agent mysql_user() {
vars:
  any::
    "users_to_check" slist => { "francois", "benoit" };
    
classes:
    "user_is_not_here_$(users_to_check)" expression => returnszero("/usr/local/bin/mysql_user_check $(users_to_check)","noshell"); 
    "mysql_users_check_NOK" expression => classmatch("user_is_not_here_.*");

commands:
    mysql_users_check_NOK::
          "/bin/echo je vais creer les users qui manquent";

reports:
    mysql_users_check_NOK::
        "Au moins un user MySQL manque";

    cfengine::
        "Le user MySQL $(users_to_check) manque"
             ifvarclass => "user_is_not_here_$(users_to_check)";
}