post_install() {
  if locale -a | grep -Eq '^cs_CZ'; then
    echo "====> A Czech locale (cs_CZ*) seems to be present. Fine. please keep it in order"
    echo "<==== to keep diacritical characters displaying correctly."
  else
    echo "====> It is recommended to generate the locale cs_CZ.ISO.UTF-8 or cs_CZ.ISO-8859-2"
    echo "      in order to display diacritical characters correctly."
    echo "      In order to do so, edit /etc/locale.gen, if present /etc/locale.nopurge, and"
    echo "<==== then run locale-gen."
  fi
}

post_upgrade() {
  post_install "$@"
}

post_remove() {
  true
}