I didn't understand your problem.
Where should we use them and why?
In build script, roundcube build stanza:
New installation, db initialization:
mysql -e "CREATE DATABASE ${ROUNDCUBE_DB};" --user=${MYSQLUSER} --password=${MYSQLPASSWORD}
mysql -e "GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER,INDEX ON ${ROUNDCUBE_DB}.* TO '${ROUNDCUBE_DB_USER}'@'
localhost' IDENTIFIED BY '${ROUNDCUBE_DB_PASS}';" --user=${MYSQLUSER} --password=${MYSQLPASSWORD}
mysql -e "use ${ROUNDCUBE_DB}; source SQL/mysql.initial.sql;" --user=${ROUNDCUBE_DB_USER} --password=${ROUNDCUBE_DB_PASS}
AND at DB upgrade
mysql -e "SET PASSWORD FOR '${ROUNDCUBE_DB_USER}'@'
localhost' = PASSWORD('${ROUNDCUBE_DB_PASS}');" --user=${MYSQLUSER} --password=${MYSQLPASSWORD}
mysql -e "GRANT SELECT,INSERT,UPDATE,DELETE,CREATE,DROP,ALTER,INDEX ON ${ROUNDCUBE_DB}.* TO '${ROUNDCUBE_DB_USER}'@'
localhost' IDENTIFIED BY '${ROUNDCUBE_DB_PASS}';" --user=${MYSQLUSER} --password=${MYSQLPASSWORD}
AND at generating db.inc.php
/usr/bin/perl -pi -e "s|mysql://roundcube
ass\@
localhost/roundcubemail|mysql://${ROUNDCUBE_DB_USER}:${ROUNDCUBE_DB_PASS}\@
localhost/${ROUNDCUBE_DB}|" db.inc.php > /dev/null
The script tries to connect to local mysql server, regardless you use a remote mysql server and have the config variables set correctly in mysql.conf.
I don't know whether there are other places in build script where we should use those variables as well.
