badmirror

#!/bin/sh

_status="$(mktemp)"
_today="$(date '+%Y-%m-%d')"
# GNU date(1) magic -- also, not dealing with edge cases (1st of the month)
_yesterday="$(date '+%Y-%m-%d' -d yesterday)"

curl --silent --output "$_status" https://archlinux.org/mirrors/status/json/

for _mirrorlist in $(awk -F '=' '/^Include/ { print $2 }' < /etc/pacman.conf |
 sort -u); do
  for _mirror in $(awk -F '=' '/^[^#]/ { gsub(/\$.*/, ""); print $2 }' < "$_mirrorlist"); do
    #                                          ^^^^- replace /$repo/os/$arch
    #                                                with /
    _last_sync="$(jq --raw-output ".urls.[] | select(.url == \"$_mirror\" ).last_sync" < "$_status")"
    case "$_last_sync" in
      null)
       tput setaf 1; echo "$_mirror is dead" >&2;
       _ret="$((_ret+1))";;
      "$_today"*|"$_yesterday"*)
        : ;;
      '')
        tput sgr0; echo "$_mirror was not found (not an official mirror?)" >&2 ;;
      *)
        tput setaf 1;echo "$_mirror is out of date" >&2;
        _ret="$((_ret+1))";;
    esac
  done
done

tput sgr0

[ -f "$_status" ] && rm "$_status"
exit "${_ret:-0}"