nixos/dsearch: add module

nixos/modules/module-list.nix

@@ -201,6 +201,7 @@
   ./programs/direnv.nix
   ./programs/dmrconfig.nix
   ./programs/droidcam.nix
+  ./programs/dsearch.nix
   ./programs/dublin-traceroute.nix
   ./programs/ecryptfs.nix
   ./programs/environment.nix

nixos/modules/programs/dsearch.nix

@@ -0,0 +1,53 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+
+let
+  inherit (lib)
+    mkEnableOption
+    mkOption
+    mkIf
+    mkPackageOption
+    types
+    ;
+
+  cfg = config.programs.dsearch;
+in
+{
+  options.programs.dsearch = {
+    enable = mkEnableOption "dsearch, a fast filesystem search service with fuzzy matching";
+
+    package = mkPackageOption pkgs "dsearch" { };
+
+    systemd = {
+      enable = mkEnableOption "systemd user service for dsearch" // {
+        default = true;
+      };
+
+      target = mkOption {
+        type = types.str;
+        default = "default.target";
+        description = ''
+          The systemd target that will automatically start the dsearch service.
+
+          By default, dsearch starts with the user session (`default.target`).
+          You can change this to `graphical-session.target` if you only want
+          it to run in graphical sessions.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+
+    systemd.packages = [ cfg.package ];
+
+    systemd.user.services.dsearch.wantedBy = mkIf cfg.systemd.enable [ cfg.systemd.target ];
+  };
+
+  meta.maintainers = with lib.maintainers; [ luckshiba ];
+}