tmux2k/scripts/battery.sh

#!/usr/bin/env bash
# setting the locale, some users have issues with different locales, this forces the correct one
export LC_ALL=en_US.UTF-8

current_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "$current_dir"/utils.sh

linux_acpi() {
    arg=$1
    BAT=$(ls -d /sys/class/power_supply/BAT* | head -1)
    if [ ! -x "$(which acpi 2>/dev/null)" ]; then
        case "$arg" in
        status)
            cat "$BAT"/status
            ;;

        percent)
            cat "$BAT"/capacity
            ;;

        *) ;;

        esac
    else
        case "$arg" in
        status)
            acpi | cut -d: -f2- | cut -d, -f1 | tr -d ' '
            ;;
        percent)
            acpi | cut -d: -f2- | cut -d, -f2 | tr -d '% '
            ;;
        *) ;;

        esac
    fi
}

battery_percent() {
    # Check OS
    case $(uname -s) in
    Linux)
        percent=$(linux_acpi percent)
        [ -n "$percent" ] && echo " $percent"
        ;;

    Darwin)
        echo $(pmset -g batt | grep -Eo '[0-9]?[0-9]?[0-9]%')
        ;;

    FreeBSD)
        echo $(apm | sed '8,11d' | grep life | awk '{print $4}')
        ;;

    CYGWIN* | MINGW32* | MSYS* | MINGW*)
        # leaving empty - TODO - windows compatability
        ;;

    *) ;;

    esac
}

battery_status() {
    # Check OS
    case $(uname -s) in
    Linux)
        status=$(linux_acpi status)
        ;;

    Darwin)
        status=$(pmset -g batt | sed -n 2p | cut -d ';' -f 2 | tr -d " ")
        ;;

    FreeBSD)
        status=$(apm | sed '8,11d' | grep Status | awk '{printf $3}')
        ;;

    CYGWIN* | MINGW32* | MSYS* | MINGW*)
        # leaving empty - TODO - windows compatability
        ;;

    *) ;;

    esac

    case $status in
    discharging | Discharging)
        echo ''
        ;;
    high)
        echo ''
        ;;
    charging)
        echo ''
        ;;
    *)
        echo ''
        ;;
    esac
    ### Old if statements didn't work on BSD, they're probably not POSIX compliant, not sure
    # if [ $status = 'discharging' ] || [ $status = 'Discharging' ]; then
    #   echo ''
    # # elif [ $status = 'charging' ]; then # This is needed for FreeBSD AC checking support
    #   # echo 'AC'
    # else
    #   echo 'AC'
    # fi
}

main() {
    bat_label=$(get_tmux_option "@tmux2k-battery-label" "")
    bat_stat=$(battery_status)
    bat_perc=$(battery_percent)

    if [ -z "$bat_stat" ]; then # Test if status is empty or not
        echo "$bat_label$bat_perc"
    elif [ -z "$bat_perc" ]; then # In case it is a desktop with no battery percent, only AC power
        echo "$bat_label $bat_stat"
    else
        echo "$bat_label $bat_stat$bat_perc"
    fi
}

#run main driver program
main