-[ -z "${_EXEC%/}" ] && _EXEC="$(realpath "${0%/*}")" || _EXEC="${_EXEC%/}"
-[ -z "${_DATA%/}" ] && _DATA=. || _DATA="${_DATA%/}"
+[ ! "${_EXEC%/}" ] && _EXEC="$(realpath "${0%/*}")" || _EXEC="${_EXEC%/}"
+[ ! "${_DATA%/}" ] && _DATA="${PWD%/}" || _DATA="${_DATA%/}"
+_BASE="${_BASE%/}"
+[ "$DEBUG" ] && exec 2>>"$DEBUG"