tools I use for hotkeys on a linux desktop

clitools.sh

#!/usr/bin/env bash

# rotate keyboard layout
#   SHIFT + ALT: rotate_layout
function rotate_layout() {
    /usr/bin/xkblayout-state set "-1"
    
    notify-send "Keyboard layout changed"
}

# rotate audio sink
#   CTRL + ALT + A: rotate_sink
function rotate_sink() {
    sink="$(
        (
            pacmd list-sinks \
            | sed -n -E "s/  (\*?) ? index: /\1/p"
            echo 0
        ) \
        | grep "*" -A 1 \
        | tail -1
    )"
    
    pacmd set-default-sink "${sink}"
    
    sink_name="$(
        pacmd list-sinks \
        | grep "  \* index:" -A 100 \
        | sed -n -E -e "s/^.*device.description = \"//p" \
        | sed -e "s/ .*$//" -e "s/\"$//g" \
        | head -1
    )"
    
    notify-send "AUDIO SINK ${sink}: ${sink_name}"
}

# bluetooth device command
#   CTRL + ALT + B: bt connect
#   CTRL + ALT + SHIFT + B: bt disconnect
function bt() {
    cmd="${1:-connect}"
    mac="${2:-70:26:05:39:B7:0F}"
    bluetoothctl "${cmd}" "${mac}" &
    sleep 1
}

case $1 in
    rotate_layout) ;;
    rotate_sink) ;;
    bt) ;;
    *)  echo "UNKNOWN: $@" && exit 1;;
esac

$@