Qubes-os update template

update-template.sh

#!/bin/bash
NEW_TEMPLATE=$2
OLD_TEMPLATE=$1
DVM_NAME=$4
OLD_DVM_NAME=$3
if [[ -z ${NEW_TEMPLATE} ]]; then
	echo "update-template.sh oldtemplate newtemplate [olddvm] [newdvm]"
	exit 1
fi
if [[ -z ${DVM_NAME} ]]; then
	DVM_NAME="${NEW_TEMPLATE}-dvm"
fi
if [[ -z ${OLD_DVM_NAME} ]]; then
	OLD_DVM_NAME="${OLD_TEMPLATE}-dvm"
fi
OLD_IFS=$IFS
VMLIST_RAW=$(qvm-ls --raw-data --fields=name,template,state,class | grep -v sys- )
VMLIST=($VMLIST_RAW)
length=${#VMLIST[@]}

function update_qube() {
	VM_NAME=$(echo $1 | cut -f1 -d'|')
	TEMPLATE_NAME=$(echo $RAW | cut -f2 -d'|')
	STATUS=$(echo $RAW | cut -f3 -d'|')
	CLASS=$(echo $RAW | cut -f4 -d'|')
	if [[ "${TEMPLATE_NAME}" == "${OLD_TEMPLATE}" || "${TEMPLATE_NAME}" == "${OLD_DVM_NAME}" ]]; then
		if [[ "${VM_NAME}" -ne "${OLD_DVM_NAME}" ]]; then
			echo $VM_NAME
			if [[ "${STATUS}" == "Halted" ]]; then
				if [[ "${CLASS}" == "AppVM" ]]; then
					qvm-prefs $VM_NAME template $NEW_TEMPLATE
				elif [[ "${CLASS}" == "DispVM" ]]; then
					qvm-prefs $VM_NAME template $DVM_NAME
				fi
			else
				echo "Qube is running"
				if [[ "$2" == "yes" ]]; then
					qvm-shutdown --force --wait $VM_NAME
					if [[ "${CLASS}" == "AppVM" ]]; then
						qvm-prefs $VM_NAME template $NEW_TEMPLATE
					elif [[ "${CLASS}" == "DispVM" ]]; then
						qvm-prefs $VM_NAME template $DVM_NAME
					fi
					qvm-start $VM_NAME
				fi
			fi
		fi
	fi
}
DVM_EXISTS=$(qvm-ls --raw-data --fields=name,template,state,class $DVM_NAME)
if [[ $? -ne 0 ]]; then
	qvm-create -l red -t $NEW_TEMPLATE $DNM_NAME
	qvm-prefs $DVM_NAME template_for_dispvms True
	qvm-features $DVM_NAME appmenus-dispvm 1
	qubes-prefs default-dispvm $DVM_NAME
fi

#update halted non sys qubes
for (( i=0; i<length; i++ )); do
	RAW=${VMLIST[$i]}
	update_qube $RAW
done

SYS_QUBES='sys-usb sys-net sys-firewall'
for i in $SYS_QUBES; do
	RAW=$(qvm-ls --raw-data --fields=name,template,state,class $i)
	update_qube $RAW yes
done