Migrate to Snowfall (#1)

Reviewed-on: #1
Co-authored-by: Evan Reichard <evan@reichard.io>
Co-committed-by: Evan Reichard <evan@reichard.io>

modules/home/services/swww/default.nix

@@ -0,0 +1,73 @@
+{ config, lib, pkgs, namespace, ... }:
+let
+  cfg = config.${namespace}.services.swww;
+in
+{
+  options.${namespace}.services.swww = {
+    enable = lib.mkEnableOption "swww wallpaper service";
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.packages = with pkgs; [
+      swww
+    ];
+
+    systemd.user = {
+      services = {
+        swww-daemon = {
+          Unit = {
+            Description = "SWWW Wallpaper Daemon";
+            After = [ "graphical-session.target" ];
+          };
+
+          Install = {
+            WantedBy = [ "graphical-session.target" ];
+          };
+
+          Service = {
+            Type = "simple";
+            ExecStart = "${pkgs.swww}/bin/swww-daemon";
+            Restart = "on-failure";
+            RestartSec = 5;
+          };
+        };
+
+        change-wallpaper = {
+          Unit = {
+            Description = "SWWW Wallpaper Changer";
+            After = [ "swww-daemon.service" ];
+            Requires = [ "swww-daemon.service" ];
+          };
+
+          Install = {
+            WantedBy = [ "swww-daemon.service" ];
+          };
+
+          Service = {
+            Type = "oneshot";
+            ExecStart = "${pkgs.writeShellScript "change-wallpaper-script" ''
+              WALLPAPER=$(${pkgs.findutils}/bin/find $HOME/Wallpapers -type f | ${pkgs.coreutils}/bin/shuf -n 1)
+              ${pkgs.swww}/bin/swww img "$WALLPAPER" --transition-type random
+            ''}";
+          };
+        };
+      };
+
+      timers.swww-schedule = {
+        Unit = {
+          Description = "SWWW Wallpaper Schedule";
+        };
+
+        Install = {
+          WantedBy = [ "timers.target" ];
+        };
+
+        Timer = {
+          OnBootSec = "1min";
+          OnUnitActiveSec = "1h";
+          Unit = "change-wallpaper.service";
+        };
+      };
+    };
+  };
+}