add .nix files

.gitignore

@@ -1,2 +1,2 @@
 /target
-Cargo.lock
+result

default.nix

@@ -0,0 +1,24 @@
+{ pkgs ? import <nixpkgs> { system = builtins.currentSystem; }
+, lib ? pkgs.lib, rustPlatform ? pkgs.rustPlatform }:
+
+rustPlatform.buildRustPackage rec {
+  pname = "pxiv";
+  version = "0.1.0";
+
+  src = ./.;
+
+  cargoLock = {
+    lockFile = ./Cargo.lock;
+  };
+
+  cargoSha256 = lib.fakeSha256; # Replace with the actual hash
+
+  nativeBuildInputs = [ pkgs.pkg-config ];
+  buildInputs = [ pkgs.openssl ];
+
+  meta = with lib; {
+    description = "a pixiv embed helper";
+    license = licenses.mit;
+    maintainers = [ ];
+  };
+}

pxiv.service.nix

@@ -0,0 +1,41 @@
+# rocket-service.nix
+{ config, pkgs, ... }:
+
+let
+  # Import the Rocket application package
+  pxivApp = import ./default.nix { inherit pkgs; };
+in
+{
+  options.services.rocket = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Enable the Rocket application service.";
+    };
+
+    port = mkOption {
+      type = types.int;
+      default = 8000;
+      description = "Port on which the Rocket application listens.";
+    };
+  };
+
+  config = mkIf config.services.rocket.enable {
+    systemd.services.pxiv = {
+      description = "pxiv embed helper service";
+      wantedBy = [ "multi-user.target" ];
+
+      # Command to start the Rocket application
+      serviceConfig.ExecStart = "${pxivApp}/bin/pxiv";
+
+      # Set the port environment variable
+      serviceConfig.Environment = [ "ROCKET_PORT=${toString config.services.rocket.port}" ];
+
+      # Restart on failure
+      serviceConfig.Restart = "always";
+
+      # Ensure the service starts after the network is up
+      after = [ "network.target" ];
+    };
+  };
+}