#!/bin/sh
cache=/tmp/cpubarscache
stats=$(awk '/cpu[0-9]+/ {printf "%d %d %d\n", substr($1,4), ($2 + $3 + $4 + $5), $5 }' /proc/stat)
[ ! -f $cache ] && echo "$stats" >"$cache"
old=$(cat "$cache")
printf "\e[11m﬙\e[10m "
echo "$stats" | while read -r row; do
	id=${row%% *}
	rest=${row#* }
	total=${rest%% *}
	idle=${rest##* }
	case "$(echo "$old" | awk '{if ($1 == id)
		printf "%d\n", (1 - (idle - $3)  / (total - $2))*100 /12.5}' \
		id="$id" total="$total" idle="$idle")" in
	"0") printf "\e[32m▁" ;;
	"1") printf "\e[32m▂" ;;
	"2") printf "\e[32m▃" ;;
	"3") printf "\e[33m▄" ;;
	"4") printf "\e[33m▅" ;;
	"5") printf "\e[33m▆" ;;
	"6" | "7" | "8") printf "\e[31m▇" ;;

	esac
done
printf "\e[0m\n"
echo "$stats" >"$cache"