himitsu: add service module

modules/services/himitsu.nix

@@ -0,0 +1,45 @@
+{ lib, pkgs, config, ... }:
+
+let cfg = config.services.himitsu;
+in {
+  options = {
+    services.himitsu = {
+      enable = mkEnableOption ''
+        Himitsu, secret storage system for Unix systems
+      '';
+
+      package = mkPackageOption pkgs "himitsu" { };
+
+      prompter = mkPackageOption pkgs "himitsu-prompter" {
+        default = [ "hiprompt-gtk-py" ];
+      };
+    };
+  };
+
+  config = mkIf (cfg.enable) {
+    home.packages = [ cfg.package cfg.prompter ];
+
+    systemd.user.services.himitsu = {
+      Unit = {
+        Description = "Himitsu daemon";
+        PartOf = "graphical-session.target";
+      };
+      Install = {
+        WantedBy = [ "graphical-session.target" ];
+      };
+      Service = {
+        ExecStart = "${cfg.package}/bin/himitsud";
+      };
+    };
+
+    xdg.configFile."himitsu/config.ini" = {
+      text = lib.generators.toINI { } {
+        himitsud = {
+          prompter = lib.getExe' cfg.prompter "hiprompt-gtk";
+        };
+      };
+    };
+  };
+
+  meta.maintainers = [ maintainers.patwid ];
+}