#! /bin/bash
set -o nounset

# Parametres
CHEMIN=~/backup/

# ADD 1; If KEEP_LAST=5 => Only 4 will be kept
KEEP_LAST=10

purge() {
        local FICHIER=$1

        NEWER_THAN=$(ls -1t $CHEMIN/$FICHIER |sed -ne "${KEEP_LAST}p")

        if [[ ! -z "$NEWER_THAN" ]]
        then
                find $CHEMIN -depth -maxdepth 1 -type f -not -newer $(ls -1t $CHEMIN/$FICHIER |sed -ne "${KEEP_LAST}p") -name "$FICHIER" -delete
        fi
}


purge 'information_schema-*.sql.gz'
purge 'mysql-*.sql.gz'
purge 'performance_schema-*.sql.gz'
purge 'zabbix-*.sql.gz'