#!/usr/bin/bash
# create 1st level-Clones

set -eu
# if less than two arguments supplied, display usage
if [[  $# -ne 2 ]]; then 
    echo "This script takes as input the name of the VM to clone"
    echo "Usage: $0 vm_name_orig vm_name_clone"
    exit 1
fi

VM_NAME=$1
VM_CLONE=$2

# change to image-directory
cd /var/lib/libvirt/images

if [[ ! -f "xml/${VM_NAME}.xml" ]] || [[ ! -f "${VM_NAME}.gcow2" ]]; then
    echo "xml or qcow2 File does not exists."
    exit 1
fi

qemu-img create -f qcow2 -F qcow2 -b "${VM_NAME}.qcow2" "${VM_NAME}-${VM_CLONE}.qcow2"
chmod a-w "${VM_NAME}-${VM_CLONE}.qcow2"

# virsh --connect=qemu:///system dumpxml "${VM_NAME}" > "xml/${VM_NAME}-${VM_CLONE}.xml"
cp "xml/${VM_NAME}.xml" "xml/${VM_NAME}-${VM_CLONE}.xml"

# hardware addresses need to be removed, libvirt will assign
# new addresses automatically
sed -i /uuid/d "xml/${VM_NAME}-${VM_CLONE}.xml"
sed -i '/mac address/d' "xml/${VM_NAME}-${VM_CLONE}.xml"

# and actually rename the vm: (this also updates the storage path)
sed -i "s/${VM_NAME}/${VM_NAME}-${VM_CLONE}/" "xml/${VM_NAME}-${VM_CLONE}.xml"