fix to allow upgrade of innodb to new pagesize as required by 12982 on install [SME: 13083]

root/etc/e-smith/events/actions/mysql-update-innodb-page-size

@@ -0,0 +1,21 @@
+#!/bin/sh
+event=$1
+# check event is defined or return
+[[ -z "$event" ]] && exit 0
+# check we run as post-install event or return
+[[ "$event" == "post-install" ]] || exit 0
+# check mariadb is not running or return
+/usr/bin/systemctl is-active mariadb -q && exit 0
+# ONLY delete the mysql data dirictory if it is initial state
+# we assume if only mysql, test, sys and performance_schema this is the case
+validdirs="/var/lib/mysql/mysql/ /var/lib/mysql/performance_schema/ /var/lib/mysql/sys/ /var/lib/mysql/test/"
+for dir in $(ls -d /var/lib/mysql/*/) ; do
+    [[ $(echo ${validdirs} | grep ${dir}) ]] || exit 0
+done
+
+# we should be safe to reset dir content
+# we use find as glob will ignore dot starting filename
+# rm -rf /var/lib/mysql/*
+find /var/lib/mysql -mindepth 1 -maxdepth 1 -print0 | xargs -0 rm -rf
+return 0
+