Apple Battery Status

battery-status.sh

#!/bin/bash
#
# @link https://gist.github.com/lavoiesl/11023856

ioreg="$(ioreg  -c AppleSmartBattery)"
current="$(echo "$ioreg" | grep CurrentCapacity | grep -oE "[0-9]+" | head -n1)"
max="$(echo "$ioreg" | grep MaxCapacity | grep -oE "[0-9]+" | head -n1)"
battery="$(( current * 100 / max ))"

echo -ne '|'

if [[ -n "$1" ]]; then
    width="$1"
    if [[ "$width" -gt 0 ]]; then
        val=$(( battery * 2 * width / 100 ))
        for (( i = 1; i <= width; i++ )); do
            if [[ $val -ge $(( i * 2 )) ]]; then
                echo -n '+'
            elif [[ $val -ge $(( i * 2 - 1)) ]]; then
                echo -n '-'
            else
                echo -n ' '
            fi
        done

        echo -n '|'
    fi
fi

# Pad with a space
printf '%3d%%' $battery