pybind11_py312: checkin new version of pybind11 using py312

Formula/pybind11_py312.rb

@@ -0,0 +1,109 @@
+class Pybind11Py312 < Formula
+  desc "Seamless operability between C++11 and Python"
+  homepage "https://github.com/pybind/pybind11"
+  url "https://github.com/pybind/pybind11/archive/refs/tags/v2.13.6.tar.gz"
+  sha256 "e08cb87f4773da97fa7b5f035de8763abc656d87d5773e62f6da0587d1f0ec20"
+  license "BSD-3-Clause"
+  head "https://github.com/pybind/pybind11.git", branch: "master", shallow: false
+
+  livecheck do
+    url :stable
+    regex(/^v?(\d+(?:\.\d+)+)$/i)
+  end
+
+  keg_only :versioned_formula
+
+  depends_on "cmake" => :build
+  depends_on "python-setuptools" => :build
+  depends_on "[email protected]" => [:build, :test]
+
+  on_mojave :or_older do
+    depends_on "gettext"
+  end
+
+  def python3
+    "python3.12"
+  end
+
+  def install
+    # Install /include and /share/cmake to the global location
+    system "cmake", "-S", ".", "-B", "build", "-DPYBIND11_TEST=OFF", "-DPYBIND11_NOPYTHON=ON", *std_cmake_args
+    system "cmake", "--install", "build"
+
+    # Install Python package too
+    python_exe = Formula["[email protected]"].opt_bin/python3
+    system python_exe, "-m", "pip", "install", *std_pip_args(prefix: libexec), "."
+
+    site_packages = Language::Python.site_packages(python_exe)
+    pth_contents = "import site; site.addsitedir('#{libexec/site_packages}')\n"
+    (prefix/site_packages/"homebrew-pybind11.pth").write pth_contents
+
+    pyversion = Language::Python.major_minor_version(python_exe)
+    bin.install libexec/"bin/pybind11-config" => "pybind11-config-#{pyversion}"
+
+    # The newest one is used as the default
+    bin.install_symlink "pybind11-config-#{pyversion}" => "pybind11-config"
+  end
+
+  def caveats
+    <<-EOS
+    this is a versioned formula designed to work with the homebrew-freecad tap
+    out of the box, the `pybind11` python module will not be accessible
+    due to the formula being keg-only
+    EOS
+  end
+
+  test do
+    # NOTE: required env vars due to formula being keg-only
+    ENV.append_path "PATH", Formula["pybind11_py312"].opt_bin
+    ENV.append_path "PYTHONPATH", "#{Formula["pybind11_py312"].opt_libexec}/lib/python3.12/site-packages"
+    ENV.append_path "LD_LIBRARY_PATH", Formula["pybind11_py312"].opt_lib
+
+    (testpath/"example.cpp").write <<~EOS
+      #include <pybind11/pybind11.h>
+
+      int add(int i, int j) {
+        return i + j;
+      }
+      namespace py = pybind11;
+      PYBIND11_MODULE(example, m) {
+        m.doc() = "pybind11 example plugin";
+        m.def("add", &add, "A function which adds two numbers");
+      }
+    EOS
+
+    (testpath/"example.py").write <<~EOS
+      import example
+      example.add(1,2)
+    EOS
+
+    python_exe = "#{Formula["[email protected]"].opt_bin}/python3.12"
+    python_config = "#{Formula["[email protected]"].opt_bin}/python3.12-config"
+    pyversion = Language::Python.major_minor_version(python_exe)
+
+    # NOTE: ci will fail with trailing `pybind11` in below but not locally
+    pybind11_include = Formula["pybind11_py312"].opt_include
+    gettext_lib = Formula["gettext"].opt_lib
+    python_flags = Utils.safe_popen_read(
+      python_config,
+      "--cflags",
+      "--ldflags",
+      "--embed",
+    ).split
+    system ENV.cxx, "-shared", "-fPIC", "-O3", "-std=c++11", "example.cpp", "-o", "example.so",
+      "-I#{pybind11_include}", *python_flags, "-L#{gettext_lib}"
+    system python_exe, "example.py"
+
+    test_module = shell_output("#{python_exe} -m pybind11 --includes")
+    # Use assert_match method correctly to check if the output includes the expected string
+    expected_module_path = "#{Formula["pybind11_py312"].opt_libexec}/lib/python3.12/site-packages/pybind11/include"
+    assert_match expected_module_path, test_module
+
+    test_script = shell_output("#{bin}/pybind11-config-#{pyversion} --includes")
+    assert_match test_module, test_script
+
+    test_module = shell_output("#{python_exe} -m pybind11 --includes")
+    test_script = shell_output("#{bin}/pybind11-config --includes")
+    assert_match test_module, test_script
+  end
+end