bin/battery-status at master · schlueter/bin · GitHub

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#!/bin/sh
# shellcheck disable=SC2046

NOTIFICATION_MESSAGE='Battery low'

notify() {
    # TODO this relies on a script available in Arch Linux' aur. Maybe it shouldn't?
    notify-send.sh -h string:x-dunst-stack-tag:battery-status -p "$@"
}

clear_notifications() {
    # TODO other notification daemons also ought to work
    pkill dunst
}

darwin_plugged() {
    if [ "$(pmset -g batt | head -1)" = "Now drawing from 'AC Power'" ]
    then echo yes
    else echo no
    fi
}

linux_plugged() {
    if upower -i /org/freedesktop/UPower/devices/line_power_ADP1 | grep 'online:.*yes' >/dev/null
    then echo yes
    else echo no
    fi
}

linux_charge() {
    if command -v upower >/dev/null && upower
    then
        upower -i /org/freedesktop/UPower/devices/battery_BAT0 \
        | awk '/percentage/{sub(/%/, "", $2); printf "%i", $2}'
    else
        echo ""
    fi
}

output() {

    printf '#[fg=%s,bg=%s]%s' "$bg_color" "$prev_color" "$sep"	# left separator
    test -n "$charge" || exit
    printf '#[fg=%s,bg=%s]%s%%' "$fg_color" "$bg_color" "$charge"	# percentage
    printf '#[fg=%s,bg=%s]%s' "$next_color" "$bg_color" "$sep"	# right separator
}

prev_color="$1"
next_color="$2"
sep="$3"
fg_color=black
bg_color="$next_color"

case $(uname -a | awk '{print $1}') in
    Darwin)
        plugged=$(darwin_plugged)
        charge=$(pmset -g batt \
                | awk '/-InternalBattery-/ {sub(/%;/, "", $3); print $3}')
        ;;
    Linux)
        plugged=$(linux_plugged)
        charge=$(linux_charge)
        ;;
esac

if [ "$plugged" = 'yes' ]
then
    printf "#[fg=%s]%s" "${next_color}" "${sep}"
    clear_notifications
    exit
fi

case "$charge" in
    "" ) ;;
    [0-9] )
        bg_color=colour196
        # This notification never goes away in xfce
        notify "$NOTIFICATION_MESSAGE" "$charge%" \
            --icon='battery-caution' \
            --urgency critical \
            --expire-time=60
    ;;
    1[0-9]) bg_color=colour202 ;;
    2[0-9]) bg_color=colour214 ;;
    3[0-9]) bg_color=colour220 ;;
    4[0-9]) bg_color=colour45  ;;
    5[0-9]) bg_color=colour63  ;;
    6[0-9]) bg_color=colour20; fg_color=white ;;
    7[0-9]) bg_color=colour25; fg_color=white ;;
    8[0-9]) bg_color=colour35 ;;
    9[0-9]) bg_color=colour85 ;;
    100)    bg_color=$next_color;;
esac
output