feat: Show directory size

#!/usr/bin/env bash

set -Eeuo pipefail

info="/run/shm/msg.html"

escape () {

    local s

    s=${1//&/\&}

file="$1"

total="$2"

body=$(escape "$3")

info="/run/shm/msg.html"

if [[ "$body" == *"..." ]]; then

  body="<p class=\"loading\">${body/.../}</p>"

  body="<p class=\"loading\">${body::-3}</p>"

fi

while true

do

  if [ -s "$file" ]; then

  if [ ! -s "$file" ] && [ ! -d "$file" ]; then

    bytes="0"

  else

    bytes=$(du -sb "$file" | cut -f1)

  fi

  if (( bytes > 1000 )); then

    if [ -z "$total" ] || [[ "$total" == "0" ]] || [ "$bytes" -gt "$total" ]; then

      size=$(numfmt --to=iec --suffix=B "$bytes" | sed -r 's/([A-Z])/ \1/')

    fi

    echo "${body//(\[P\])/($size)}"> "$info"

  fi

  fi

  sleep 1 & wait $!

done