services.mysql: wait for galera cluster sync to be done

            done

          ''}

          ${lib.optionalString isMariaDB ''

            # If MariaDB is used in an Galera cluster, we have to check if the sync is done,

            # or it will fail to init the database while joining, so we get in an broken non recoverable state

            # so we wait until we have an synced state

            if ${cfg.package}/bin/mysql -u ${superUser} -N -e "SHOW VARIABLES LIKE 'wsrep_on'" 2>/dev/null | ${lib.getExe' pkgs.gnugrep "grep"} -q 'ON'; then

              echo "Galera cluster detected, waiting for node to be synced..."

              while true; do

                STATE=$(${cfg.package}/bin/mysql -u ${superUser} -N -e "SHOW STATUS LIKE 'wsrep_local_state_comment'" | ${lib.getExe' pkgs.gawk "awk"} '{print $2}')

                if [ "$STATE" = "Synced" ]; then

                  echo "Node is synced"

                  break

                else

                  echo "Current state: $STATE - Waiting for 1 second..."

                  sleep 1

                fi

              done

            fi

          ''}

          if [ -f ${cfg.dataDir}/mysql_init ]

          then

              # While MariaDB comes with a 'mysql' super user account since 10.4.x, MySQL does not