sdformat15: support multiple python versions

Build bindings for both [email protected] and [email protected].

Signed-off-by: Steve Peters <[email protected]>

Formula/sdformat15.rb

@@ -1,50 +1,58 @@
 class Sdformat15 < Formula
   desc "Simulation Description Format"
   homepage "http://sdformat.org"
-  url "https://osrf-distributions.s3.amazonaws.com/sdformat/releases/sdformat-15.0.0.tar.bz2"
-  sha256 "c6c65ac60c502143afc2e4e258d66b92d12c4ab37cf91b5852a50eab4d0f3b1f"
+  url "https://github.com/gazebosim/sdformat.git", branch: "scpeters/build_python_bindings_separately"
+  version "15.0.0~pre1"
   license "Apache-2.0"
 
   head "https://github.com/gazebosim/sdformat.git", branch: "sdf15"
 
-  bottle do
-    root_url "https://osrf-distributions.s3.amazonaws.com/bottles-simulation"
-    sha256 sonoma:  "30f1dd8393161bebe0bb8f3bd3e5cc90462e09e3d04294ea1ed0b6928df19159"
-    sha256 ventura: "212c79cc2989ba711db1a1cbef8dc86b3ed804c61b1278443767a3e475f33473"
-  end
-
   depends_on "cmake" => [:build, :test]
   depends_on "pkg-config" => [:build, :test]
   depends_on "pybind11" => :build
+  depends_on "[email protected]" => [:build, :test]
+  depends_on "[email protected]" => [:build, :test]
 
   depends_on "doxygen"
   depends_on "gz-cmake4"
   depends_on "gz-math8"
   depends_on "gz-tools2"
   depends_on "gz-utils3"
   depends_on macos: :mojave # c++17
-  depends_on "[email protected]"
   depends_on "tinyxml2"
   depends_on "urdfdom"
 
-  def python_cmake_arg
-    "-DPython3_EXECUTABLE=#{which("python3")}"
+  def pythons
+    deps.map(&:to_formula)
+        .select { |f| f.name.match?(/^python@3\.\d+$/) }
+  end
+
+  def python_cmake_arg(python = "[email protected]".to_formula)
+    "-DPython3_EXECUTABLE=#{python.opt_libexec}/bin/python"
   end
 
   def install
     cmake_args = std_cmake_args
     cmake_args << "-DBUILD_TESTING=Off"
     cmake_args << "-DCMAKE_INSTALL_RPATH=#{rpath}"
-    cmake_args << python_cmake_arg
 
-    # Use a build folder
+    # first build without python bindings
     mkdir "build" do
-      system "cmake", "..", *cmake_args
+      system "cmake", "..", *cmake_args, "-DSKIP_PYBIND11=ON"
       system "make", "install"
     end
 
-    (lib/"python3.12/site-packages").install Dir[lib/"python/*"]
-    rmdir prefix/"lib/python"
+    # now build only the python bindings
+    pythons.each do |python|
+      # remove @ from formula name
+      python_name = python.name.tr("@", "")
+      mkdir "build_#{python_name}" do
+        system "cmake", "../python", *cmake_args, python_cmake_arg(python)
+        system "make", "install"
+        (lib/"#{python_name}/site-packages").install Dir[lib/"python/*"]
+        rmdir prefix/"lib/python"
+      end
+    end
   end
 
   test do
@@ -90,6 +98,8 @@ def install
     cmd_not_grep_xcode = "! grep -rnI 'Applications[/]Xcode' #{prefix}"
     system cmd_not_grep_xcode
     # check python import
-    system Formula["[email protected]"].opt_bin/"python3.12", "-c", "import sdformat15"
+    pythons.each do |python|
+      system python.opt_libexec/"bin/python", "-c", "import sdformat15"
+    end
   end
 end