sudo tee /usr/local/bin/update-dolibarr.sh > /dev/null << 'EOF'
#!/bin/bash

set -e

VERSION="23.0.3"
BACKUPDIR="/root/dolibarr-backup-$(date +%F-%H%M)"
INSTALLDIR="/usr/share/dolibarr"
OLDDIR="/usr/share/dolibarr-old"
TMPDIR="/tmp/dolibarr-update"

echo "=== Dolibarr Update startet ==="

mkdir -p $BACKUPDIR
mkdir -p $TMPDIR

echo "=== Backup Dateien ==="
tar -czf $BACKUPDIR/dolibarr-files.tar.gz $INSTALLDIR

echo "=== DB Daten auslesen ==="

DB_NAME=$(grep dolibarr_main_db_name /etc/dolibarr/conf.php | cut -d"'" -f2)
DB_USER=$(grep dolibarr_main_db_user /etc/dolibarr/conf.php | cut -d"'" -f2)
DB_PASS=$(grep dolibarr_main_db_pass /etc/dolibarr/conf.php | cut -d"'" -f2)

echo "=== SQL Backup ==="

mysqldump -u $DB_USER -p$DB_PASS $DB_NAME \
> $BACKUPDIR/dolibarr.sql

echo "=== Download Dolibarr $VERSION ==="

cd $TMPDIR

wget https://sourceforge.net/projects/dolibarr/files/Dolibarr%20ERP-CRM/$VERSION/dolibarr-$VERSION.tgz/download -O dolibarr.tgz

echo "=== Entpacken ==="

tar -xzf dolibarr.tgz

echo "=== Alte Installation sichern ==="

rm -rf $OLDDIR
mv $INSTALLDIR $OLDDIR

echo "=== Neue Version installieren ==="

mv $TMPDIR/dolibarr-$VERSION $INSTALLDIR

echo "=== Konfiguration kopieren ==="

cp /etc/dolibarr/conf.php $INSTALLDIR/htdocs/conf/

echo "=== Rechte setzen ==="

chown -R www-data:www-data $INSTALLDIR
chown -R www-data:www-data /var/lib/dolibarr

echo "=== Apache Neustart ==="

systemctl restart apache2

echo "=== install.lock setzen ==="

touch /var/lib/dolibarr/documents/install.lock
chown www-data:www-data /var/lib/dolibarr/documents/install.lock
chmod 644 /var/lib/dolibarr/documents/install.lock

echo ""
echo "====================================="
echo "Update vorbereitet."
echo "Jetzt im Browser aufrufen:"
echo ""
echo "/dolibarr/install"
echo ""
echo "Danach Datenbankmigration durchführen."
echo "====================================="
EOF