Linux battery status - useful for zsh customization

battery.go

package main

import (
	"fmt"
	"math"
	"os/exec"
	"strconv"
	"strings"
)

func main() {
	cmd := exec.Command("bash", "-c", "upower -i /org/freedesktop/UPower/devices/battery_BAT0 | grep -E 'percentage' | awk '{print $2}' | sed 's/%//'")
	out, err := cmd.Output()
	checkErr(err)
	v := string(out)
	v = strings.Trim(v, "\n")
	perc, err := strconv.Atoi(v)
	checkErr(err)
	charged := int(math.Floor(float64(perc) / 10))
	notCharged := 10 - charged
	fmt.Println(strings.Repeat("◉ ", charged) + strings.Repeat("⦾ ", notCharged))
}

func checkErr(err error) {
	if err != nil {
		panic(err)
	}
}