[NixOS] Modify brightness.sh to use brightnessctl

dotfiles/config/xmonad/xmonad.hs

@@ -1059,7 +1059,7 @@ addKeys conf@XConfig { modMask = modm } =
     , ((hyper .|. shiftMask, xK_q), spawn "toggle_mute_current_window.sh")
     , ((hctrl, xK_q), spawn "toggle_mute_current_window.sh only")
 
-    , ((0, xF86XK_MonBrightnessUp), spawn "brightness.sh 5")
+    , ((0, xF86XK_MonBrightnessUp), spawn "brightness.sh +5")
     , ((0, xF86XK_MonBrightnessDown), spawn "brightness.sh -5")
 
     ] ++

dotfiles/lib/bin/brightness.sh

@@ -1,3 +1,84 @@
-#!/usr/bin/env sh
+#!/usr/bin/env bash
 
-volnoti-show $(sudo brightness_manager.py -c "$@" -p)
+# Get the brightness argument (default to empty string to just show current)
+ARG="${1:-}"
+
+# Function to get current brightness percentage
+get_brightness_percentage() {
+    # Get list of devices
+    local devices=$(brightnessctl --list 2>/dev/null | cut -d' ' -f2 | cut -d"'" -f2)
+    local device_count=$(echo "$devices" | wc -w)
+
+    if [ "$device_count" -eq 0 ]; then
+        echo "50"  # Default fallback
+        return
+    fi
+
+    if [ "$device_count" -eq 1 ]; then
+        # Single device - just output its percentage
+        local info=$(brightnessctl 2>/dev/null | grep -oP '\d+%' | head -1 | tr -d '%')
+        if [ -n "$info" ]; then
+            echo "$info"
+        else
+            echo "50"
+        fi
+    else
+        # Multiple devices - output each device's brightness
+        local output=""
+        for device in $devices; do
+            local info=$(brightnessctl -d "$device" 2>/dev/null | grep -oP '\d+%' | head -1 | tr -d '%')
+            if [ -n "$info" ]; then
+                if [ -z "$output" ]; then
+                    output="${device}:${info}"
+                else
+                    output="${output} ${device}:${info}"
+                fi
+            fi
+        done
+
+        if [ -n "$output" ]; then
+            echo "$output"
+        else
+            echo "50"
+        fi
+    fi
+}
+
+# Apply brightness change if argument provided
+if [ -n "$ARG" ]; then
+    # Determine if it's absolute or relative
+    if [[ "$ARG" == +* ]]; then
+        # Relative increase (e.g., +5)
+        BRIGHTNESS_CMD="${ARG:1}%+"
+    elif [[ "$ARG" == -* ]]; then
+        # Relative decrease (e.g., -5)
+        BRIGHTNESS_CMD="${ARG:1}%-"
+    else
+        # Absolute value (e.g., 50)
+        BRIGHTNESS_CMD="${ARG}%"
+    fi
+
+    # Try to apply to all devices
+    # First, try to get list of devices
+    DEVICES=$(brightnessctl --list 2>/dev/null | cut -d' ' -f2 | cut -d"'" -f2)
+
+    if [ -n "$DEVICES" ]; then
+        # Apply to each device
+        for device in $DEVICES; do
+            brightnessctl -d "$device" set "$BRIGHTNESS_CMD" >/dev/null 2>&1
+        done
+    else
+        # Fallback: just run brightnessctl without specifying device
+        brightnessctl set "$BRIGHTNESS_CMD" >/dev/null 2>&1
+    fi
+fi
+
+# Get current brightness percentage for display
+BRIGHTNESS=$(get_brightness_percentage)
+
+# Show notification if volnoti-show is available
+if command -v volnoti-show &> /dev/null; then
+    volnoti-show "$BRIGHTNESS"
+else
+    echo "$BRIGHTNESS"
+fi