eigenrand: init at 0.5.1

Co-authored-by: Aleksana <alexander.huang.y@gmail.com>

pkgs/by-name/ei/eigenrand/package.nix

@@ -0,0 +1,48 @@
+{
+  cmake,
+  eigen,
+  fetchFromGitHub,
+  gtest,
+  lib,
+  stdenv,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "eigenrand";
+  version = "0.5.1";
+
+  src = fetchFromGitHub {
+    owner = "bab2min";
+    repo = "EigenRand";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-mrpkWIb6kfLvppmIfzhjF1/3m1zSd8XG1D07V6Zjlu0=";
+  };
+
+  # Avoid downloading googletest: we already have it.
+  postPatch = ''
+    substituteInPlace CMakeLists.txt --replace-fail \
+      "FetchContent_MakeAvailable(googletest)" \
+      "add_subdirectory(${gtest.src} googletest SYSTEM)"
+  '';
+
+  postInstall = ''
+    # Remove installed tests and googletest stuff
+    rm -rf $out/bin $out/include/gmock $out/include/gtest $out/lib
+  '';
+
+  nativeBuildInputs = [ cmake ];
+  propagatedBuildInputs = [ eigen ];
+  checkInputs = [ gtest ];
+
+  doCheck = true;
+
+  cmakeFlags = [ "-DCMAKE_CTEST_ARGUMENTS=--exclude-regex;EigenRand-test" ];
+
+  meta = {
+    description = "Fastest Random Distribution Generator for Eigen";
+    homepage = "https://github.com/bab2min/EigenRand";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ nim65s ];
+    platforms = lib.platforms.unix;
+  };
+})