backup WP, then update all via WP-CLI

update.sh

#!/bin/sh
# MNKY lab's custom backup script
# author:	Martin Rehberger <martin@mnkylab.com>
# author uri:	https://mnkylab.com
# license:	GPL v3 or later
# license uri:	https://www.gnu.org/licenses/gpl.html

### variables
WPCLI=/home/www/.../files/wp-cli.phar
EXPORTPATH=~/html/backups/
STARTTIME=`date +%Y-%m-%d.%H-%M`
DBEXPORT=export-$STARTTIME.sql


### helper functions
log() {
	# $1 is the message to log
	echo "[$(date +%H:%M:%S)] $1"
}
backup_wp_db() {
	# $1 is path where export should be stored
	# $2 is path to WP install
	php_cli $WPCLI db export $1/$DBEXPORT --path=$2
}
clean_wp_db() {
	# $1 is path where export is stored
	rm $1/$DBEXPORT
}
copy_tar_root() {
	# $1 abs path to dir
	# $2 abs path to tar file
	TMP=/tmp/$(basename $1)
	cp -R $1 $TMP
	tar czPf $2 $TMP
	rm -rf $TMP
}
backup() {
	# $1 abspath
	# $2 localpath
	# $3 tar
	backup_wp_db $1 $2
	copy_tar_root $1 $3
	clean_wp_db $1
}
update() {
	# $1 localpath
	php_cli $WPCLI plugin update --all --path=$1
	log "finished plugins"

	php_cli $WPCLI theme update --all --path=$1
}
backup_update() {
	# $1 is abspath
	TIME=`date +%Y-%m-%d.%H-%M`
	TAREND=-$TIME.tar.gz
	ME=$EXPORTPATH$(basename $1)$TAREND
	if [ -f $1/htdocs/index.php ]; then
		LOCALPATH=$1/htdocs
	elif [ -f $1/index.php ]; then
		LOCALPATH=$1
	fi

	backup $1 $LOCALPATH $ME
	log "finished backup"

	update $LOCALPATH
	log "finished update"
}

### start backup
for D in ~/html/wordpress-*; do
	log $D
	if [ -f $D/wp-config.php ]; then
		log "start $(basename $D)"
		
		backup_update $D
		
		log "end $(basename $D)"
	fi
done