Fork the desktop off Omarchy as a self-contained system

bin/blob-hw-display

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# blob:summary=Print the most likely display backlight device.
+# blob:examples=blob-hw-display
+
+backlight_path="${BLOB_BACKLIGHT_PATH:-/sys/class/backlight}"
+
+# Start with the first possible output, then refine to the most likely given an order heuristic.
+# Glob the candidates in the loop list: [[ ]] does not do pathname expansion.
+# The Touch Bar on T2 Macs registers a backlight that never drives the display panel.
+device="$(ls -1 "$backlight_path" 2>/dev/null | grep -vx appletb_backlight | head -n1)"
+# gmux comes first: apple-gmux only registers when the kernel has already picked it, and on
+# dual-GPU Macs the GPU's own PWM stops driving the panel once that GPU suspends.
+for candidate in "$backlight_path"/gmux_backlight "$backlight_path"/amdgpu_bl* "$backlight_path"/intel_backlight "$backlight_path"/acpi_video*; do
+  if [[ -e $candidate ]]; then
+    device="${candidate##*/}"
+    break
+  fi
+done
+
+if [[ -n $device ]]; then
+  printf '%s\n' "$device"
+else
+  exit 1
+fi