update-mirrors

#!/bin/bash
set -euo pipefail

mlnew="/etc/pacman.d/mirrorlist.pacnew"
mldest="/etc/pacman.d/mirrorlist"

if [[ ! -f "$mlnew" ]]; then
  echo "mirrorlist is up-to-date" >&2
  exit
fi

proto="https:"
if [[ ${1:-""} =~ --?i(nsecure)? ]]; then
  proto="https?:"
  shift
fi

country="${1:-"United States"}"

mapfile -t sc << EOF
	BEGIN { a=0 };
	/## $country/{ b=1; next };
	/##/{ b=0 };
	/#Server = $proto/{ if(b == 1) print "Server = " \$3 }
EOF

tmp="$(mktemp -u "/tmp/mirrorlist-XXXX")"
awk "${sc[*]}" < "$mlnew" > "$tmp" || {
  echo "awk failure" >&2
  exit 1
}

echo "ranking mirrors..." >&2
rankmirrors -vn 10 "$tmp" | tee "${tmp}-ranked"
echo "rankmirrors success" >&2

echo "installing new mirrorlist to $mldest..." >&2
sudo mv "${tmp}-ranked" "$mldest"

echo "removing $mlnew..." >&2
sudo rm "$mlnew"

echo "cleaning up..." >&2
rm "$tmp"

echo "$0 finished" >&2