Fix packaging for Nix

Signed-off-by: Slendi <slendi@socopon.com>

CMakeLists.txt

@@ -67,6 +67,9 @@ endif()
 if(BUILD_TESTS)
 	enable_testing()
 
+	find_package(GTest QUIET)
+
+	if(NOT GTest_FOUND)
 		include(FetchContent)
 		FetchContent_Declare(
 			googletest
@@ -74,6 +77,7 @@ if(BUILD_TESTS)
 		)
 		set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 		FetchContent_MakeAvailable(googletest)
+	endif()
 
 	file(GLOB TEST_SOURCES "${CMAKE_SOURCE_DIR}/tests/*.cpp")
 
@@ -86,3 +90,4 @@ if(BUILD_TESTS)
 	include(GoogleTest)
 	gtest_discover_tests(smath_tests)
 endif()
+

README.md

@@ -1,4 +1,19 @@
 # smath
 
-Single-file linear algebra math library for C++23.
+Single-file, header-only linear algebra math library for C++23.
+
+## Features
+
+- Generic `Vec<N, T>` class with useful aliases `Vec2/Vec3/Vec4` and friendly accessors (`x/y/z/w`, `r/g/b/a`). They support approx-equal and tuple/structured bindings.
+- `std::format` support.
+- Compile-time swizzles via `swizzle<"...">`.
+- Generic matrix `Mat` class with useful aliases `Mat2/Mat3/Mat4`.
+- `Quaternion<T>` built on `Vec4`.
+- Angle helpers `rad/deg/turns` respecting a configurable base unit via the macro `SMATH_ANGLE_UNIT`.
+- Optional implicit conversions.
+- Packing utilities for normalized RGBA (`pack_unorm4x8`, `unpack_snorm4x8`, etc.).
+
+## License
+
+This library is licensed under the Apache License 2.0. See the (LICENSE.txt)[LICENSE.txt] file for more details.
 

flake.nix

@@ -36,7 +36,11 @@
 
           src = ./.;
 
-          nativeBuildInputs = [ pkgs.copyPkgconfigItems ];
+          nativeBuildInputs = with pkgs; [
+            cmake
+            gtest
+            copyPkgconfigItems
+          ];
 
           pkgconfigItems = [
             (pkgs.makePkgconfigItem rec {
@@ -51,17 +55,18 @@
             })
           ];
 
-          dontBuild = true;
-
           installPhase = ''
             runHook preInstall
             mkdir -p $out/include
-            cp include/*.hpp $out/include/
+            cp ../include/smath.hpp $out/include/
             runHook postInstall
           '';
 
+          dontBuild = false;
+          doCheck = true;
+
           meta = with pkgs.lib; {
-            description = desc;
+            description = "Single-file linear algebra math library for C++23.";
             homepage = "https://github.com/slendidev/smath";
             license = licenses.asl20;
             platforms = platforms.all;