#!/bin/bash
# https://mariadb.com/kb/en/using-encryption-and-compression-tools-with-mariabackup/
set -e

myDir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
. "$myDir/config.sh"

backupFile=$1

if [ -z "$backupFile" ]; then
	echo "Backup file not defined."
	exit 1
fi

if [ ! -f "$backupFile" ]; then
	echo "Backup file does not exist: $backupFile"
	exit 2
fi

echo "Restoring MySQL data from backup."

rm -rf "$restoreDir"
mkdir -p "$restoreDir"

echo "Decompresing backup."
gzip --decompress --stdout "$backupFile" \
	| mbstream -x --directory="$restoreDir"

echo "Preparing backup."
mariabackup \
	--defaults-extra-file="$myDir/my.cnf" \
	--prepare \
	--target-dir="$restoreDir"

echo "Stopping service."
service mariadb stop
if pgrep mariadbd; then pkill -9 mariadbd; fi

echo "Restoring data."
rm -rf "$dataDir"
mariabackup \
	--defaults-extra-file="$myDir/my.cnf" \
	--move-back \
	--target-dir="$restoreDir" \
	2>> "$logFile"
chown -R mysql:mysql "$dataDir"

rm "$dataDir/mysql/slow_log."*
rm "$dataDir/mysql/general_log."*

echo "Removing restore data."
rm -r "$restoreDir"