#!/bin/bash

# omarchy:summary=Print the most likely display backlight device.
# omarchy:examples=omarchy-hw-display

# Start with the first possible output, then refine to the most likely given an order heuristic.
device="$(ls -1 /sys/class/backlight 2>/dev/null | head -n1)"
for candidate in amdgpu_bl* intel_backlight acpi_video*; do
  if [[ -e /sys/class/backlight/$candidate ]]; then
    device="$candidate"
    break
  fi
done

if [[ -n $device ]]; then
  printf '%s\n' "$device"
else
  exit 1
fi