- set CMAKE_GENERATOR env var to ensure Ninja is used on all platfo…

…rms in CI

  - note: setting this in the scikit-build-core cmake args is not sufficient
  - scikit-build-core uses the default cmake generator on windows, which is modified by the CMAKE_GENERATOR env var
- fix config-subfolder logic to only apply when Visual Studio is used as generator
- ensure MSVC is the active default compiler on windows CI
  - scikit-build-core uses whatever the current default is (while scikit-build always uses MSVC)

.github/workflows/release.yml

@@ -22,7 +22,6 @@ on:
 
 env:
   USE_QEMU: ${{ github.event.inputs.use_qemu == 'true' }}
-  CMAKE_BUILD_PARALLEL_LEVEL: 4
 
 jobs:
   build-wheels:
@@ -71,6 +70,12 @@ jobs:
       if: runner.os == 'Windows' && ((!matrix.use_qemu) || fromJSON(env.USE_QEMU))
       run: git config --system core.longpaths true
 
+    - name: Set up msvc on Windows
+      if: runner.os == 'Windows'
+      uses: ilammy/msvc-dev-cmd@v1
+      with:
+        arch: ${{ matrix.arch }}
+
     - name: Override LLVM version (${{ github.event.inputs.llvm_version }})
       if: github.event.inputs.llvm_version
       run: |

CMakeLists.txt

@@ -22,7 +22,7 @@ ExternalProject_add(build-clang-format
   BUILD_COMMAND ${CMAKE_COMMAND} --build . --target clang-format --config Release
 )
 set(config-subfolder "")
-if(CMAKE_CXX_COMPILER_ID STREQUAL "MSVC")
+if(CMAKE_GENERATOR MATCHES "Visual Studio")
   set(config-subfolder "Release")
 endif()
 set(clang-format-executable ${CMAKE_BINARY_DIR}/llvm/${config-subfolder}/bin/clang-format${CMAKE_EXECUTABLE_SUFFIX})

pyproject.toml

@@ -40,11 +40,13 @@ wheel.py-api = "py2.py3"
 cmake.version = ">=3.16.0"
 ninja.version = ">=1.10.0"
 cmake.verbose = true
-logging.level = "INFO"
+logging.level = "DEBUG"
 
 [tool.cibuildwheel]
 # Super-verbose output for debugging purpose
 build-verbosity = 3
+# Set CMAKE_GENERATOR env var which is respected by scikit-build-core to use Ninja on all platforms
+environment = "CMAKE_GENERATOR=Ninja"
 
 # restrict to a single Python version as wheel does not depend on Python
 build = "cp39-*"