.

.gitignore

@@ -21,6 +21,8 @@
 # Whitelist nix
 !flake.nix
 !flake.lock
+!default.nix
+!module.nix
 
 # Whitelist database
 !*.sqlite

default.nix

@@ -0,0 +1,18 @@
+{ lib, buildGoModule }:
+
+buildGoModule {
+  pname = "henna";
+  version = "0.1.0";
+
+  src = ./.;
+
+  vendorHash = null;
+
+  CGO_ENABLED = 1;
+
+  meta = with lib; {
+    description = "Henna gallery server";
+    license = licenses.mit;
+    maintainers = [ ];
+  };
+}

flake.nix

@@ -7,7 +7,9 @@
   };
 
   outputs = { self, nixpkgs, flake-utils }:
-    flake-utils.lib.eachDefaultSystem (system:
+    {
+      nixosModules.default = import ./module.nix;
+    } // flake-utils.lib.eachDefaultSystem (system:
       let
         pkgs = nixpkgs.legacyPackages.${system};
       in

main.go

@@ -34,6 +34,8 @@ var (
 	imaginaryURL  string
 	galleryPath   string
 	databasePath  string
+	listenAddr    string
+	listenPort    int
 	randomCovers  []CoverData
 )
 
@@ -41,6 +43,8 @@ func main() {
 	flag.StringVar(&imaginaryURL, "imaginary", "http://192.168.88.54:10001", "imaginary root URL")
 	flag.StringVar(&galleryPath, "gallery", "/home/user/mnt/panda/galleries/", "gallery path")
 	flag.StringVar(&databasePath, "database", "./db.sqlite", "database path")
+	flag.StringVar(&listenAddr, "address", "localhost", "listen address")
+	flag.IntVar(&listenPort, "port", 10000, "listen port")
 	flag.Parse()
 
 	var err error
@@ -68,8 +72,9 @@ func main() {
 	http.Handle("/assets/", http.FileServer(http.FS(assetsFS)))
 	http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir(galleryPath))))
 
-	log.Println("Server listening on :8080")
-	log.Fatal(http.ListenAndServe(":10000", nil))
+	addr := fmt.Sprintf("%s:%d", listenAddr, listenPort)
+	log.Printf("Server listening on %s", addr)
+	log.Fatal(http.ListenAndServe(addr, nil))
 }
 
 func handleRandom(w http.ResponseWriter, r *http.Request) {

module.nix

@@ -0,0 +1,86 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.services.henna;
+in
+{
+  options.services.henna = {
+    enable = lib.mkEnableOption "Henna gallery server";
+
+    package = lib.mkOption {
+      type = lib.types.package;
+      default = pkgs.callPackage ./default.nix { };
+      description = "The henna package to use.";
+    };
+
+    imaginaryUrl = lib.mkOption {
+      type = lib.types.str;
+      description = "Imaginary server root URL.";
+    };
+
+    galleryPath = lib.mkOption {
+      type = lib.types.path;
+      description = "Path to the gallery directory.";
+    };
+
+    databasePath = lib.mkOption {
+      type = lib.types.path;
+      default = ./db.sqlite;
+      description = "Path to the SQLite database file.";
+    };
+
+    address = lib.mkOption {
+      type = lib.types.str;
+      default = "localhost";
+      description = "Address to listen on.";
+    };
+
+    port = lib.mkOption {
+      type = lib.types.port;
+      default = 10000;
+      description = "Port to listen on.";
+    };
+
+    user = lib.mkOption {
+      type = lib.types.str;
+      default = "henna";
+      description = "User to run henna as.";
+    };
+
+    group = lib.mkOption {
+      type = lib.types.str;
+      default = "henna";
+      description = "Group to run henna as.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    users.users.${cfg.user} = {
+      isSystemUser = true;
+      group = cfg.group;
+    };
+
+    users.groups.${cfg.group} = { };
+
+    systemd.services.henna = {
+      description = "Henna gallery server";
+      wantedBy = [ "multi-user.target" ];
+      after = [ "network.target" ];
+
+      serviceConfig = {
+        ExecStart = ''
+          ${cfg.package}/bin/henna \
+            -imaginary "${cfg.imaginaryUrl}" \
+            -gallery "${cfg.galleryPath}" \
+            -database "${cfg.databasePath}" \
+            -address "${cfg.address}" \
+            -port ${toString cfg.port}
+        '';
+        User = cfg.user;
+        Group = cfg.group;
+        Restart = "on-failure";
+        RestartSec = 5;
+      };
+    };
+  };
+}