coin3d_py312: create a new versioned formula of coin3d

Formula/coin3d_py312.rb

@@ -0,0 +1,123 @@
+class Coin3dPy312 < Formula
+  desc "Open Inventor 2.1 API implementation (Coin) with Python bindings (Pivy)"
+  homepage "https://coin3d.github.io/"
+  license all_of: ["BSD-3-Clause", "ISC"]
+
+  stable do
+    url "https://github.com/coin3d/coin/releases/download/v4.0.2/coin-4.0.2-src.zip"
+    sha256 "b764a88674f96fa540df3a9520d80586346843779858dcb6cd8657725fcb16f0"
+
+    resource "soqt" do
+      url "https://github.com/coin3d/soqt",
+      :using => :git,
+      :revision => "c4ea49cb671753bad04d57e58ed520dc42d65784"
+    end
+
+    resource "pivy" do
+      url "https://github.com/coin3d/pivy/archive/931d18f8aa98126f738ff9224ba0ccbd6beed75c.tar.gz"
+      sha256 "a318f0988e7cc0598d819e6143c2c88769d02029a03f3dcaca3e6b02c32608d9"
+    end
+  end
+
+  head do
+    url "https://github.com/coin3d/coin.git", branch: "master"
+
+    resource "pivy" do
+      url "https://github.com/coin3d/pivy.git", branch: "master"
+    end
+  end
+
+  keg_only :versioned_formula
+
+  depends_on "cmake" => :build
+  depends_on "doxygen" => :build
+  depends_on "freecad/freecad/swig@4.1.1" => :build
+  depends_on "boost"
+  depends_on "freecad/freecad/pyside6_py312"
+  depends_on "python-setuptools"
+  depends_on "python@3.12"
+
+  on_linux do
+    depends_on "mesa"
+    depends_on "mesa-glu"
+  end
+
+  def python3
+    "python3.12"
+  end
+
+  def install
+    system "cmake", "-S", ".", "-B", "_build",
+                    "-DCMAKE_CXX_STANDARD=11",
+                    "-DCOIN_BUILD_DOCUMENTATION=ON",
+                    "-DCOIN_BUILD_DOCUMENTATION_MAN=ON",
+                    "-DCMAKE_INSTALL_PREFIX=#{prefix}",
+                    "-L"
+    system "cmake", "--build", "_build"
+    system "cmake", "--install", "_build"
+
+    resource("pivy").stage do
+      ENV.append_path "CMAKE_PREFIX_PATH", prefix.to_s
+      ENV["LDFLAGS"] = "-Wl,-rpath,#{opt_lib}"
+      system python3, "-m", "pip", "install", *std_pip_args, "."
+    end
+  end
+
+  def post_install
+    # explicitly set python version
+    python_version = "3.12"
+
+    # Unlink the existing .pth file to avoid reinstall issues
+    pth_file = lib/"python#{python_version}/coin3d_py312-pivy.pth"
+    pth_file.unlink if pth_file.exist?
+
+    ohai "Creating .pth file for pivy module"
+    # write the .pth file to the site-packages directory
+    (lib/"python#{python_version}/coin3d_py312-pivy.pth").write <<~EOS
+      import site; site.addsitedir('#{lib}/python#{python_version}/site-packages/')
+    EOS
+  end
+
+  def caveats
+    <<~EOS
+      this formula is keg-only, and intended to aid in the building of freecad
+      this formula should NOT be linked using `brew link` or else errors will
+      arise when opening the #{python3} repl
+      the test in this formula will fail in a screen (GUI) can not be accessed
+    EOS
+  end
+
+  test do
+    # NOTE: required because formula is keg_only
+    coin3d_py312_include = Formula["coin3d_py312"].opt_include
+
+    (testpath/"test.cpp").write <<~EOS
+      #include <Inventor/SoDB.h>
+      int main() {
+        SoDB::init();
+        SoDB::cleanup();
+        return 0;
+      }
+    EOS
+
+    opengl_flags = if OS.mac?
+      ["-Wl,-framework,OpenGL"]
+    else
+      ["-L#{Formula["mesa"].opt_lib}", "-lGL"]
+    end
+
+    system ENV.cc, "test.cpp", "-L#{lib}", "-lCoin", *opengl_flags, "-o", "test", "-I#{coin3d_py312_include}"
+    system "./test"
+
+    ENV.append_path "PYTHONPATH", Formula["coin3d_py312"].opt_prefix/Language::Python.site_packages(python3)
+    ENV.append_path "PYTHONPATH", Formula["pyside6_py312"].opt_prefix/Language::Python.site_packages(python3)
+    # Set QT_QPA_PLATFORM to minimal to avoid error:
+    # "This application failed to start because no Qt platform plugin could be initialized."
+    ENV["QT_QPA_PLATFORM"] = "minimal" if OS.linux? && ENV["HOMEBREW_GITHUB_ACTIONS"]
+    system Formula["python@3.12"].opt_bin/"python3.12", "-c", <<~EOS
+      import shiboken6
+      from pivy.sogui import SoGui
+      assert SoGui.init("test") is not None
+    EOS
+  end
+end