home/wm: add kb to change keybord brightness

home/modules/window_manager/scripts/kdb_brightness.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+function SetKeyboardBrightness() {
+  echo $1 | sudo tee /sys/class/leds/asus\:\:kbd_backlight/brightness
+}
+
+min_brightness="0"
+max_brightness=$(cat /sys/class/leds/asus\:\:kbd_backlight/max_brightness)
+current_brightness=$(cat /sys/class/leds/asus\:\:kbd_backlight/brightness)
+
+case "$1" in
+  "up")
+    if [ "$current_brightness" != "$max_brightness" ]; then
+      let 'current_brightness+=1'
+    fi
+    ;;
+
+  "down")
+    if [ "$current_brightness" != "$bin_brightness" ]; then
+      let 'current_brightness-=1'
+    fi
+    ;;
+
+  *)
+    echo "Usage: $0 {up|down}"
+    exit 1
+    ;;
+esac
+
+SetKeyboardBrightness $current_brightness

home/modules/window_manager/xmonad.nix

@@ -27,6 +27,7 @@ let themeCfg = config.local.theme; in
         inherit (themeCfg.window) activeBorder inactiveBorder;
         inherit (themeCfg.highlights) critical warning success;
         inherit (themeCfg.syntax) mark1 mark2 mark3;
+        kdbBrightnessScriptPath = "${./scripts/kdb_brightness.sh}";
       };
     };
 

home/modules/window_manager/xmonad_config.hs

@@ -358,8 +358,12 @@ myKeys conf =
         -- Change volume
         ("<XF86AudioMute>", spawn "amixer -q sset Master toggle"),
         ("<XF86AudioRaiseVolume>", spawn "amixer -q sset Master 5%+"),
-        ("<XF86AudioLowerVolume>", spawn "amixer -q sset Master 5%-")
+        ("<XF86AudioLowerVolume>", spawn "amixer -q sset Master 5%-"),
+        -- Change keyboard brightness
+        ("<XF86KbdBrightnessUp>", spawn (kdbBrightness "up")),
+        ("<XF86KbdBrightnessDown>", spawn (kdbBrightness "down"))
       ]
+      where kdbBrightness cmd = myTerminal ++ " -- @kdbBrightnessScriptPath@ " ++ cmd
 
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 -- Mouse bindings: default actions bound to mouse events