libigl: init at 2.5.0

Co-authored-by: Sandro <[e-mail]>

pkgs/by-name/li/libigl/package.nix

···
+{
+  lib,
+  stdenvNoCC,
+  fetchFromGitHub,
+}:
+
+stdenvNoCC.mkDerivation (finalAttrs: {
+  pname = "libigl";
+  version = "2.5.0";
+
+  src = fetchFromGitHub {
+    owner = "libigl";
+    repo = "libigl";
+    rev = "v${finalAttrs.version}";
+    hash = "sha256-OpjkQGRiuc7kNlwgCeM4dcotTb5J+6LUn4IOe9bFbW4=";
+  };
+
+  # We could also properly use CMake, but we would have to heavily patch it
+  # to avoid configure-time downloads of many things.
+  installPhase = ''
+    mkdir -p $out/include
+    cp -r include/igl $out/include
+  '';
+
+  meta = with lib; {
+    description = "Simple C++ geometry processing library";
+    homepage = "https://github.com/libigl/libigl";
+    license = licenses.mpl20;
+    maintainers = with maintainers; [ nim65s ];
+  };
+})