#!/bin/bash

if [[ $# -ne 2 ]]; then
  echo "USAGE: $0 <source> <dest>"
  exit 0
else
    orig="$1"
    dest="$2"
fi

sudo virt-clone --original "${orig}" --name "${dest}" --auto-clone

sudo virt-sysprep \
  -d "${dest}" \
  --operations defaults,-ssh-userdir \
  --hostname "${dest}" \
  --edit /etc/hosts:"s/${orig}/${dest}/" \
  --edit /etc/hostname:"s/${orig}/${dest}/" \
  --edit /etc/motd:"s/${orig}/${dest}/" \
  --firstboot-command 'dpkg-reconfigure openssh-server' \
  --firstboot-command 'systemctl restart sshd'

getLinkLocalAddress() {
  local macAddress=$(sudo grep -o -E '([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}' /etc/libvirt/qemu/${dest}.xml)
  printf "%02x%s" $(( 16#${macAddress:0:2} ^ 2#00000010 )) "${macAddress:2}" \
    | sed -E -e 's/([0-9a-zA-Z]{2})*/0x\0|/g' \
    | tr -d ':\n' \
    | xargs -d '|' \
    printf "fe80::%02x%02x:%02xff:fe%02x:%02x%02x"
}

printf "The link-local IP address of %s is:\n  %s\n" "${dest}" "$(getLinkLocalAddress)"