greeter: allow mangowc as compositor

quickshell/Modules/Greetd/assets/dms-greeter

@@ -2,6 +2,8 @@
 
 set -e
 
+export WLR_DRM_DEVICES=/dev/dri/card1
+
 COMPOSITOR=""
 COMPOSITOR_CONFIG=""
 DMS_PATH="dms-greeter"
@@ -14,7 +16,7 @@ dms-greeter - DankMaterialShell greeter launcher
 Usage: dms-greeter --command COMPOSITOR [OPTIONS]
 
 Required:
-    --command COMPOSITOR    Compositor to use (niri, hyprland, or sway)
+    --command COMPOSITOR    Compositor to use (niri, hyprland, sway, or mangowc)
 
 Options:
     -C, --config PATH       Custom compositor config file
@@ -29,6 +31,7 @@ Examples:
     dms-greeter --command hyprland -C /etc/greetd/custom-hypr.conf
     dms-greeter --command sway -p /home/user/.config/quickshell/custom-dms
     dms-greeter --command niri --cache-dir /tmp/dmsgreeter
+    dms-greeter --command mangowc
 EOF
 }
 
@@ -204,9 +207,20 @@ SWAY_EOF
         exec sway -c "$COMPOSITOR_CONFIG"
         ;;
 
+    mangowc)
+        TEMP_DIR=$(mktemp -d)
+        if [[ -n "$COMPOSITOR_CONFIG" ]]; then
+            cp "$COMPOSITOR_CONFIG" "$TEMP_DIR/config.conf"
+        else
+            touch "$TEMP_DIR/config.conf"
+        fi
+        export MANGOCONFIG="$TEMP_DIR"
+        exec mango -s "$QS_CMD && mmsg -d quit"
+        ;;
+
     *)
         echo "Error: Unsupported compositor: $COMPOSITOR" >&2
-        echo "Supported compositors: niri, hyprland, sway" >&2
+        echo "Supported compositors: niri, hyprland, sway, mangowc" >&2
         exit 1
         ;;
 esac