config_sway/bin/sway_brightness

#!/bin/bash
source $HOME/.config/sway/bin/sway_helpers
DEVICE=sysfs/backlight/intel_backlight
APP=light

## main
_log BRIGHTNESS INFO args: $*
_check_app $APP

case $1 in
  d*)
    light -s $DEVICE -U 10
    ;;
  i*)
    light -s $DEVICE -A 10
    ;;
  *)
    echo "invalid argument: \"$1\""
    echo "arguments: [decrease|increase]"
    ;;
esac