post_install() {
  if [[ -z $(getent group mercure) ]]; then
    groupadd mercure
  fi

  if [[ -z $(getent passwd mercure) ]]; then
    useradd -c 'Mercure' -g mercure -d / -s /usr/bin/nologin mercure
  fi

  passwd -l mercure > /dev/null
}

post_upgrade() {
  post_install
}

post_remove() {
  if [[ -n $(getent passwd mercure) ]]; then
    userdel mercure
  fi

  if [[ -n $(getent group mercure) ]]; then
    groupdel mercure
  fi
}