feat(wrapping): introduce wrapped configurations

hosts/shared/swaybg.nix

@@ -0,0 +1,47 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}: let
+  cfg = config.alqueva.programs.swaybg;
+  inherit (lib) types;
+in {
+  options.alqueva.programs.swaybg = {
+    enable = lib.mkEnableOption "swaybg";
+    package = lib.mkPackageOption pkgs "swaybg" {};
+    wallpaper = lib.mkOption {
+      default = "";
+      description = "The wallpaper you want to use with swaybg.";
+      type = types.oneOf [types.str types.package types.path];
+    };
+    mode = lib.mkOption {
+      default = "fill";
+      description = "How you want the wallpaper to be displayed.";
+      type = types.str;
+    };
+    extraServiceConfig = {
+      default = {};
+      description = "Extra settings you want to apply to the systemd service.";
+      type = types.attrsOf types.anything;
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.user.services.swaybg = {
+      inherit (cfg.package.meta) description;
+
+      wantedBy = ["graphical-session.target"];
+      after = ["graphical-session-pre.target"];
+      partOf = ["graphical-session.target"];
+
+      script = lib.getExe' cfg.package "swaybg";
+      scriptArgs = "-i ${cfg.wallpaper} -m ${cfg.mode}";
+
+      serviceConfig = {
+        Restart = "always";
+        RestartSec = "5";
+      };
+    };
+  };
+}