#!/bin/sh
# stdin: default config
# stdout: modified config

# replace all occurrences of "mirrorlist" with "de-p1st-mirrorlist"
sed 's|^Include\s*=\s*/etc/pacman.d/mirrorlist$|Include = /etc/pacman.d/de-p1st-mirrorlist|; s|^#\s*Include\s*=\s*/etc/pacman.d/mirrorlist$|#Include = /etc/pacman.d/de-p1st-mirrorlist|'