Process the archlinux pacman mirrorlist for US

pacman-mirrorlist.hook

[Trigger]
Operation=Install
Operation=Upgrade
Type=Package
Target=pacman-mirrorlist

[Action]
Depends=pacman
When=PostTransaction
Exec=/usr/bin/rank-mirror-list.sh

PKGBUILD

pkgname=('pacman-mirrorlist-hook')
pkgver=1
pkgrel=1
pkgdesc='Pacman mirrorlist hook.'
arch=('any')
depends=('pacman' 'pacman-mirrorlist')
source=('pacman-mirrorlist.hook' 'rank-mirror-list.sh')
md5sums=('b51e1a45b23b2831709e7732fe88d4c8'
         '5cceded6741d705fd09b919de9e1234b')

package() {
  install -Dm600 pacman-mirrorlist.hook ${pkgdir}/etc/pacman.d/hooks/pacman-mirrorlist.hook
  install -Dm755 rank-mirror-list.sh ${pkgdir}/usr/bin/rank-mirror-list.sh
}

rank-mirror-list.sh

#!/bin/bash

if [ $(id -u) != 0 ]; then
  exec sudo -- "$0" "$@"
elif [ -e /etc/pacman.d/mirrorlist.pacnew ]; then
  cat /etc/pacman.d/mirrorlist.pacnew \
    | awk -v RS='\n\n' '/^## United States/{print $0}' \
    | awk '/^#Server/{print substr($0, 2)}' \
    | rankmirrors - > /etc/pacman.d/mirrorlist
  rm /etc/pacman.d/mirrorlist.pacnew
else
	echo "Already processed pacnew"
fi