Add nix flake files

flake.nix

@@ -0,0 +1,64 @@
+{
+  description = "Development environment";
+
+  inputs = {
+    naersk = { url = "github:nmattia/naersk/master"; };
+    nixpkgs = { url = "github:NixOS/nixpkgs/nixos-unstable"; };
+    utils = { url = "github:numtide/flake-utils"; };
+    flake-compat = {
+      url = github:edolstra/flake-compat;
+      flake = false;
+    };
+  };
+
+  outputs = { self, nixpkgs, utils, naersk, ... }:
+   utils.lib.eachDefaultSystem (system:
+      let
+        inherit (nixpkgs.lib) optional;
+        naersk-lib = pkgs.callPackage naersk { };
+        pkgs = import nixpkgs { inherit system; };
+        libPath = with pkgs; lib.makeLibraryPath [
+            openssl
+        ];
+      in
+      {
+        defaultPackage = naersk-lib.buildPackage {
+          src = ./.;
+          doCheck = false;
+          pname = "uvm";
+          nativeBuildInputs = [ pkgs.makeWrapper pkgs.pkg-config ];
+          buildInputs = with pkgs; [
+            p7zip
+            glibc
+            openssl
+          ];
+          postInstall = ''
+            wrapProgram "$out/bin/uvm" --prefix LD_LIBRARY_PATH : "${libPath}"
+          '';
+        };
+
+        defaultApp = utils.lib.mkApp {
+          drv = self.defaultPackage."${system}";
+        };
+
+        devShell = with pkgs; mkShell {
+
+          buildInputs = [
+            cargo
+            cargo-insta
+            pre-commit
+            rust-analyzer
+            rustPackages.clippy
+            rustc
+            rustfmt
+            openssl
+            pkg-config
+          ];
+
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+          LD_LIBRARY_PATH = libPath;
+        };
+
+      });
+}
+

shell_.nix

@@ -0,0 +1,19 @@
+{ nixpkgs ? import <nixpkgs> { }}:
+
+let
+  rust_overlay = import (builtins.fetchTarball "https://github.com/oxalica/rust-overlay/archive/master.tar.gz");
+  pkgs = import <nixpkgs> { overlays = [ rust_overlay ]; };
+in
+with pkgs;
+mkShell {
+    buildInputs = [
+      rust-bin.stable.latest.default
+      rust-analyzer
+      openssl
+      pkg-config
+      p7zip
+
+    ];
+
+    RUST_BACKTRACE = 1;
+  }