netgen@6.2.2601: checkin new version of netgen

Closes #755.

Signed-off-by: Chris <chris.r.jones.1983@gmail.com>

Author: ipatch

Formula/netgen@6.2.2601.rb

@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: LGPL-2.1-or-later
+# SPDX-FileNotice: Part of the FreeCAD project.
+
+class NetgenAT622601 < Formula
+  desc "C++ Library of NETGEN's tetrahedral mesh generator"
+  homepage "https://github.com/ngsolve/netgen"
+  url "https://github.com/ngsolve/netgen.git",
+    tag:      "v6.2.2601"
+  license "LGPL-2.1-only"
+  head "https://github.com/ngsolve/netgen.git", branch: "master"
+
+  keg_only :versioned_formula
+
+  depends_on "cmake" => :build
+  depends_on "llvm" => [:build, :test]
+  depends_on "ninja" => :build
+  depends_on "opencascade"
+  depends_on "pybind11"
+  depends_on "python@3.13"
+  depends_on "zlib-ng-compat"
+
+  def install
+    ENV["CC"] = Formula["llvm"].opt_bin/"clang"
+    ENV["CXX"] = Formula["llvm"].opt_bin/"clang++"
+
+    python3 = Formula["python@3.13"].opt_bin/"python3.13"
+
+    ENV["PYTHON"] = python3.to_s
+
+    # Get the Python includes directory without duplicates
+    py_inc_output = `#{python3}-config --includes`
+    py_inc_dirs = py_inc_output.scan(/-I([^\s]+)/).flatten.uniq
+    py_inc_dir = py_inc_dirs.join(" ")
+
+    puts "----------------------------------------------------"
+    puts "PYTHON=#{ENV["PYTHON"]}"
+    puts "----------------------------------------------------"
+
+    args = %W[
+      -DCMAKE_INSTALL_PREFIX=#{prefix}
+      -DUSE_PYTHON=ON
+      -DPython3_EXECUTABLE=#{python3}
+      -DPython3_INCLUDE_DIR=#{py_inc_dir}
+      -DUSE_GUI=OFF
+      -DUSE_OCC=ON
+      -DUSE_SUPERBUILD=OFF
+      -DBUILD_FOR_CONDA=OFF
+      -G Ninja
+      -L
+    ]
+
+    system "cmake", "-S", ".", "-B", "build", *args
+    system "cmake", "--build", "build"
+    system "cmake", "--install", "build"
+  end
+
+  def caveats
+    <<~EOS
+      this is a versioned formula so it is NOT linked in HOMBREW_PREFIX by default
+      running brew test netgen currently fails with gcc if built with llvm
+    EOS
+  end
+
+  test do
+    ENV["CC"] = Formula["llvm"].opt_bin/"clang"
+    ENV["CXX"] = Formula["llvm"].opt_bin/"clang++"
+
+    puts "-----------------------------------------------"
+    puts "prefix = #{prefix}"
+    puts "include = #{include}"
+    puts "-----------------------------------------------"
+
+    ng_include = if OS.mac?
+      prefix/"Contents/Resources/include"
+    else
+      include/"include"
+    end
+
+    ng_lib = if OS.mac?
+      prefix/"Contents/MacOS"
+    else
+      lib
+    end
+
+    (testpath/"test.cpp").write <<~EOS
+      #include <meshing/meshing.hpp>
+      int main() { return 0; }
+    EOS
+
+    if OS.mac?
+      res = prefix/"Contents/Resources/include"
+      system ENV.cxx, "test.cpp", "-I#{res}", "-I#{res}/include", "-L#{ng_lib}", "-lnglib", "-o", "test"
+    else
+      system ENV.cxx, "test.cpp", "-I#{ng_include}", "-L#{ng_lib}", "-lnglib", "-o", "test"
+    end
+    system "./test"
+  end
+end