Restore modern Python versions to CI (#2525)

This changelist restores support for modern Python versions to the GitHub CI for MaterialX, replacing a CMake call to `setup.py` with `pip install`.

Additionally, the minimum Python version in our root `pyproject.toml` file has been raised from 3.6 to 3.9, aligning with the current minimum version of Python required by MaterialX.

Author: jstone-lucasfilm

.github/workflows/main.yml

@@ -25,17 +25,17 @@ jobs:
           python: 3.9
           cmake_config: -DMATERIALX_BUILD_SHARED_LIBS=ON -DMATERIALX_BUILD_MONOLITHIC=ON
 
-        - name: Linux_GCC_14_Python39
+        - name: Linux_GCC_14_Python312
           os: ubuntu-24.04
           compiler: gcc
           compiler_version: "14"
-          python: 3.9
+          python: 3.12
 
-        - name: Linux_GCC_14_Python311
+        - name: Linux_GCC_14_Python313
           os: ubuntu-24.04
           compiler: gcc
           compiler_version: "14"
-          python: 3.11
+          python: 3.13
           test_render: ON
 
         - name: Linux_GCC_CoverageAnalysis
@@ -53,32 +53,32 @@ jobs:
           python: 3.9
           cmake_config: -DMATERIALX_BUILD_SHARED_LIBS=ON
 
-        - name: Linux_Clang_18_Python311
+        - name: Linux_Clang_18_Python313
           os: ubuntu-24.04
           compiler: clang
           compiler_version: "18"
-          python: 3.11
+          python: 3.13
           clang_format: ON
 
-        - name: MacOS_Xcode_15_Python39
+        - name: MacOS_Xcode_15_Python311
           os: macos-14
           compiler: xcode
           compiler_version: "15.4"
           cmake_config: -DMATERIALX_BUILD_SHARED_LIBS=ON
-          python: 3.9
+          python: 3.11
 
-        - name: MacOS_Xcode_15_Python311
+        - name: MacOS_Xcode_16_Python312
           os: macos-15
           compiler: xcode
           compiler_version: "16.1"
-          python: 3.11
+          python: 3.12
           test_shaders: ON
 
-        - name: MacOS_Xcode_16_Python311
+        - name: MacOS_Xcode_16_Python313
           os: macos-15
           compiler: xcode
           compiler_version: "16.1"
-          python: 3.11
+          python: 3.13
           static_analysis: ON
           cmake_config: -DCMAKE_EXPORT_COMPILE_COMMANDS=ON
 
@@ -103,10 +103,10 @@ jobs:
           python: 3.9
           cmake_config: -G "Visual Studio 17 2022" -A "Win32"
 
-        - name: Windows_VS2022_x64_Python311
+        - name: Windows_VS2022_x64_Python313
           os: windows-2025
           architecture: x64
-          python: 3.11
+          python: 3.13
           cmake_config: -G "Visual Studio 17 2022" -A "x64"
           test_shaders: ON
 

pyproject.toml

@@ -13,7 +13,7 @@ authors = [
   { name="Contributors to the MaterialX project", email="materialx-discussion@lists.aswf.io" },
 ]
 readme = "README.md"
-requires-python = ">=3.6"
+requires-python = ">=3.9"
 
 classifiers = [
     "Programming Language :: Python :: 3",

python/CMakeLists.txt

@@ -14,5 +14,5 @@ endif()
 if(MATERIALX_INSTALL_PYTHON AND PYTHON_EXECUTABLE AND NOT SKBUILD)
   set(SETUP_PY "${CMAKE_INSTALL_PREFIX}/python/setup.py")
   configure_file("${CMAKE_CURRENT_SOURCE_DIR}/setup.py.in" "${SETUP_PY}")
-  install(CODE "execute_process(COMMAND ${PYTHON_EXECUTABLE} ${SETUP_PY} install clean --all)")
+  install(CODE "execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install . WORKING_DIRECTORY ${CMAKE_INSTALL_PREFIX}/python)")
 endif()