Initial commit

flake.nix

@@ -0,0 +1,96 @@
+{
+  description = "vnj";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+
+    rust-overlay = {
+      url = "github:oxalica/rust-overlay";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    naersk = {
+      url = "github:nix-community/naersk";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {
+    self,
+    naersk,
+    nixpkgs,
+    flake-utils,
+    rust-overlay,
+  }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [(import rust-overlay)];
+        pkgs = import nixpkgs { inherit system overlays; };
+
+        rust = pkgs.rust-bin.stable.latest.default;
+        naersk' = pkgs.callPackages naersk {};
+
+        vnj = naersk'.buildPackage {
+          src = ./.;
+        };
+
+        nixosModule = { pkgs, config, lib, ... }:
+        let
+          ts = lib.types;
+          cfg = config.services.vnj;
+        in
+        {
+          options.services.vnj = {
+            enable = lib.mkEnableOption "vnj";
+            user = lib.mkOption {
+              type = ts.str;
+            };
+
+            instances = lib.mkOption {
+              description = "instances of the vnj";
+              type = ts.attrsOf ts.attrs;
+            };
+          };
+
+          config.systemd.services = lib.mkIf cfg.enable (lib.attrsets.mapAttrs' (name: value:
+            let
+              gen = pkgs.formats.toml {};
+              toml-cfg = gen.generate "config.toml" value;
+            in
+            {
+              name = "vnj-${name}";
+              value = {
+                wantedBy = [ "multi-user.target" ];
+                after = [ "network.target" ];
+                description = "VNJ";
+
+                serviceConfig = {
+                  Type = "simple";
+                  User = cfg.user;
+                  ExecStart = "${vnj}/bin/vnj --config ${toml-cfg}";
+                };
+              };
+            }
+          ) cfg.instances);
+        };
+      in
+      {
+        packages.vnj = vnj;
+        packages.default = vnj;
+
+        nixosModules.default = nixosModule;
+
+        devShells.default = pkgs.mkShell {
+          shellHook = ''
+            export PS1="(vnj) $PS1"
+          '';
+
+          buildInputs = [
+            (rust.override {
+              extensions = [ "rust-src" "rust-analyzer" ];
+            })
+          ];
+        };
+      }
+    );
+}