From 627a3932b9cfccd276e028c128f7fbbeef285804 Mon Sep 17 00:00:00 2001
From: Lin Xianyi <iynaix@gmail.com>
Date: Mon, 11 Aug 2025 18:54:27 +0800
Subject: [PATCH] swww: add extraArgs for swww-daemon

---
 modules/services/swww.nix                        | 16 +++++++++++++++-
 .../swww/swww-graphical-session-target.nix       |  5 +++++
 .../swww/swww-graphical-session-target.service   |  2 +-
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/modules/services/swww.nix b/modules/services/swww.nix
index cb622498..422aa1eb 100644
--- a/modules/services/swww.nix
+++ b/modules/services/swww.nix
@@ -13,6 +13,20 @@ in
   options.services.swww = {
     enable = lib.mkEnableOption "swww, a Solution to your Wayland Wallpaper Woes";
     package = lib.mkPackageOption pkgs "swww" { };
+    extraArgs = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
+      default = [ ];
+      example = [
+        "--no-cache"
+        "--layer"
+        "bottom"
+      ];
+      description = ''
+        Options given to swww-daemon when the service is run.
+
+        See `swww-daemon --help` for more information.
+      '';
+    };
   };
 
   config = lib.mkIf cfg.enable {
@@ -35,7 +49,7 @@ in
       };
 
       Service = {
-        ExecStart = "${lib.getExe' cfg.package "swww-daemon"}";
+        ExecStart = "${lib.getExe' cfg.package "swww-daemon"} ${lib.escapeShellArgs cfg.extraArgs}";
         Restart = "always";
         RestartSec = 10;
       };
diff --git a/tests/modules/services/swww/swww-graphical-session-target.nix b/tests/modules/services/swww/swww-graphical-session-target.nix
index c55b7153..c7bd2efa 100644
--- a/tests/modules/services/swww/swww-graphical-session-target.nix
+++ b/tests/modules/services/swww/swww-graphical-session-target.nix
@@ -3,6 +3,11 @@
   services.swww = {
     enable = true;
     package = config.lib.test.mkStubPackage { outPath = "@swww@"; };
+    extraArgs = [
+      "--no-cache"
+      "--layer"
+      "bottom"
+    ];
   };
 
   nmt.script = ''
diff --git a/tests/modules/services/swww/swww-graphical-session-target.service b/tests/modules/services/swww/swww-graphical-session-target.service
index 4c219ff7..180ca621 100644
--- a/tests/modules/services/swww/swww-graphical-session-target.service
+++ b/tests/modules/services/swww/swww-graphical-session-target.service
@@ -2,7 +2,7 @@
 WantedBy=graphical-session.target
 
 [Service]
-ExecStart=@swww@/bin/swww-daemon
+ExecStart=@swww@/bin/swww-daemon --no-cache --layer bottom
 Restart=always
 RestartSec=10