#!/bin/bash
set -ex

oldip="$(grep -Po '^lester.* \K(\d+\.){3}\d+$' zones/xaviera.systems.zone)"
newip="$(curl -fsS https://ipv4.icanhazip.com)"

[[ "$oldip" = "$newip" ]] && { echo "Nothing to do"; exit; }

for file in $(grep -lr "$oldip"); do
    sed -i "s/${oldip}/${newip}/g" "$file"
    awk -i inplace '/; serial/{sub(/[0-9]+/, $1+1)} 1' "$file"
done

git diff