Display OS Updates

When integrated with Waybar, this script returns the number of OS updates.

As an example, the returned text below shows that no updates are available.
{“text”:“ “,“tooltip”:“No updates”,“class”:“unmuted”}

!/usr/bin/env bash

OS=$(cat /etc/os-release | grep "^NAME" | sed -E 's/^NAME=("?)(.+)("?)/\2/' | tail -1)

NUM=0;

if [[ $OS =~ "Void" ]]; then
  NUM=$(xbps-install -nuM | wc -l)
elif [[ $OS == "ArcoLinux" ]]; then
  NUM=$(checkupdates | wc -l)
fi

if [ "$NUM" -gt 0 ]; then
  echo '{"text":"{" '$NUM'","tooltip":"Updates available","class":"unmuted"}'
else
  echo '{"text":" ","tooltip":"No updates","class":"unmuted"}'
fi