pacmrr.sh

#!/bin/bash
# Download pacman ranked mirror list

# Country codes: AU AT BY BE BR BG CA CL CN CO CZ DK EE FI FR DE GR HU IN IE IL
# IT JP KZ KR LV LU MK NL NC NZ NO PL PT RO RU RS SG SK ZA ES LK SE CH TW TR UA
# GB US UZ VN
country='US'
url="https://www.archlinux.org/mirrorlist/?country=US&protocol=http&ip_version=4&use_mirror_status=on"

# Download
tmp_ml=$(mktemp --suffix=-mirrorlist)  # temporary mirrorlist
if curl -s "$url" -o "$tmp_ml"; then
  if ! grep "^## Arch Linux repository mirrorlist" "$tmp_ml" > /dev/null; then
    echo " Error: Download invalid"
    exit 1
  fi
else
  echo " Error: Download failed"
  exit 1
fi

# Edit
sed -i 's/^#Server/Server/g'          "$tmp_ml"

# View
while true; do
  read -p " View the downloaded mirrorlist? (y/n): " yn
  case $yn in
    [Yy] )  if hash vim 2>&- ; then # use vim if available
              editor=vim
              editop=$(printf '%s' +"set syn=sh");
            else
              editor=nano; fi
            "$editor" "$editop" "$tmp_ml"
            break 2 ;;
    [Nn] )  break 2 ;;
    [*]  )  true
  esac
done

# Permission test
prm_tst () {
if [ "$UID" != 0 ] && [ ! hash sudo 2>&- ] ; then
  echo " Program "sudo" required for regular user"
  exit 1
else
  sudo=sudo
fi ; }

# Backup and Install
bck_ml () {
if [ -f /etc/pacman.d/mirrorlist ]; then
  $sudo mv /etc/pacman.d/mirrorlist /etc/pacman.d/mirrorlist_$(date +%Y%m%d%H%M)
else
  echo " Warning: no /etc/pacman.d/mirrorlist"
fi ; }

while true; do
  read -p " Install new mirrorlist and backup previous? (y/n): " yn
  case $yn in
    [Yy] )  prm_tst
            bck_ml
            $sudo install -Dm644 "$tmp_ml" /etc/pacman.d/mirrorlist
            break 2 ;;
    [Nn] )  break 2 ;;
    [*]  )  true
  esac
done