swaync: use x-restart-triggers for reload (#6764)

Use x-restart-triggers to reload on file change, since users
with impermanence setups were running into issues with onChange and calling the `swaync-client` to handle the hot reload.

Author: khaneliman

modules/services/swaync.nix

@@ -82,17 +82,13 @@ in {
     home.packages = [ cfg.package pkgs.at-spi2-core ];
 
     xdg.configFile = {
-      "swaync/config.json" = {
-        source = jsonFormat.generate "config.json" cfg.settings;
-        onChange = "${lib.getExe' cfg.package "swaync-client"} --reload-config";
-      };
+      "swaync/config.json".source =
+        jsonFormat.generate "config.json" cfg.settings;
       "swaync/style.css" = lib.mkIf (cfg.style != null) {
-
         source = if builtins.isPath cfg.style || lib.isStorePath cfg.style then
           cfg.style
         else
           pkgs.writeText "swaync/style.css" cfg.style;
-        onChange = "${lib.getExe' cfg.package "swaync-client"} --reload-css";
       };
     };
 
@@ -103,6 +99,11 @@ in {
         PartOf = [ config.wayland.systemd.target ];
         After = [ config.wayland.systemd.target ];
         ConditionEnvironment = "WAYLAND_DISPLAY";
+        X-Restart-Triggers = lib.mkMerge [
+          [ config.xdg.configFile."swaync/config.json".source ]
+          (lib.mkIf (cfg.style != null)
+            [ config.xdg.configFile."swaync/style.css".source ])
+        ];
       };
 
       Service = {

tests/modules/services/swaync/swaync.nix

@@ -10,8 +10,11 @@
   };
 
   nmt.script = ''
+    serviceFile=home-files/.config/systemd/user/swaync.service
+    serviceFile=$(normalizeStorePaths $serviceFile)
+
     assertFileContent \
-      home-files/.config/systemd/user/swaync.service \
+      $serviceFile \
       ${
         builtins.toFile "swaync.service" ''
           [Install]
@@ -29,6 +32,7 @@
           Description=Swaync notification daemon
           Documentation=https://github.com/ErikReider/SwayNotificationCenter
           PartOf=graphical-session.target
+          X-Restart-Triggers=/nix/store/00000000000000000000000000000000-config.json
         ''
       }
   '';