variant-lite: init at 2.0.0

pkgs/by-name/gp/gpt4all/package.nix

@@ -10,6 +10,7 @@
   qt6,
   fmt,
   shaderc,
+  variant-lite,
   vulkan-headers,
   wayland,
   cudaSupport ? config.cudaSupport,
@@ -53,6 +54,7 @@ stdenv.mkDerivation (finalAttrs: {
   buildInputs =
     [
       expected-lite
+      variant-lite
       fmt
       qt6.qtwayland
       qt6.qtquicktimeline

pkgs/by-name/va/variant-lite/package.nix

@@ -0,0 +1,34 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  ninja,
+}:
+
+stdenv.mkDerivation rec {
+  pname = "variant-lite";
+  version = "2.0.0";
+
+  src = fetchFromGitHub {
+    owner = "martinmoene";
+    repo = "variant-lite";
+    rev = "v${version}";
+    hash = "sha256-zLyzNzeD0C4e7CYqCCsPzkqa2cH5pSbL9vNVIxdkEfc=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    ninja
+  ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = ''A C++17-like variant, a type-safe union for C++98, C++11 and later in a single-file header-only library'';
+    homepage = "https://github.com/martinmoene/variant-lite";
+    changelog = "https://github.com/martinmoene/variant-lite/blob/${src.rev}/CHANGES.txt";
+    license = licenses.boost;
+    maintainers = with maintainers; [ titaniumtown ];
+  };
+}