Waybar Arch Linux Custom Update Module. Including AUR with (checkupdates-with-aur)

barconfig.json

"custom/updates": {
    "format": "{}",
    "interval": 3600,
    "exec": "~/.config/waybar/scripts/updatecheck",
    "return-type": "json",
    "exec-if": "exit 0",
    "signal": 8
  },

udpatecheck

#!/usr/bin/env bash

check() {
	command -v "$1" 1>/dev/null
}

notify() {
	check notify-send && {
		notify-send "$@"
		return
	}
	echo "$@"
}

stringToLen() {
	STRING="$1"
	LEN="$2"
	if [ ${#STRING} -gt "$LEN" ]; then
		echo "${STRING:0:$((LEN - 2))}.."
	else
		printf "%-20s" "$STRING"
	fi
}

check checkupdates-with-aur || {
	cat <<EOF
  {"text":"ERR","tooltip":"checkupdates-with-aur is not installed"}
EOF
	exit 1
}
IFS=$'\n'$'\r'

killall -q checkupdates-with-aur
mapfile -t updates < <(checkupdates-with-aur)

text=${#updates[@]}
tooltip="<b>$text  updates (arch+aur) </b>\n"
tooltip+=" <b>$(stringToLen "PkgName" 20) $(stringToLen "PrevVersion" 20) $(stringToLen "NextVersion" 20)</b>\n"
[ "$text" -eq 0 ] && text="" || text+="  "

for i in "${updates[@]}"; do
  # shellcheck disable=2046
	update="$(stringToLen $(echo "$i" | awk '{print $1}') 20)"
  # shellcheck disable=2046
	prev="$(stringToLen $(echo "$i" | awk '{print $2}') 20)"
  # shellcheck disable=2046
	next="$(stringToLen $(echo "$i" | awk '{print $4}') 20)" # skipping '->' string
	tooltip+="<b> $update </b>$prev $next\n"
done
tooltip=${tooltip::-2}

cat <<EOF
{ "text":"$text", "tooltip":"$tooltip"}  
EOF

# vim: ft=sh

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Dependencies

Waybar
Arch Linux
checkupdates-with-aur