Fix CI build failures for GPU and macOS wheels

- Add CMAKE_PREFIX_PATH=$CONDA_PREFIX to GPU wheel_build tasks in pixi.toml
  to ensure CMake can find pybind11 and other dependencies
- Add CIBW_ENVIRONMENT_MACOS and CIBW_ENVIRONMENT_WINDOWS to cibuildwheel.yml
  to pass CMAKE_PREFIX_PATH with absolute path to pixi environment

Author: jeongseok-meta

.github/workflows/cibuildwheel.yml

@@ -58,6 +58,10 @@ jobs:
       - name: Build wheels
         uses: pypa/cibuildwheel@v2.22.0
         # Configuration is in pyproject.toml (generated from pyproject-pypi.toml.j2)
+        env:
+          # Override environment for macOS/Windows to use absolute path
+          CIBW_ENVIRONMENT_MACOS: CMAKE_PREFIX_PATH=${{ github.workspace }}/.pixi/envs/default MOMENTUM_BUILD_WITH_FBXSDK=OFF
+          CIBW_ENVIRONMENT_WINDOWS: CMAKE_PREFIX_PATH=${{ github.workspace }}/.pixi/envs/default MOMENTUM_BUILD_WITH_FBXSDK=OFF
 
       - uses: actions/upload-artifact@v4
         with:

pixi.toml

@@ -498,7 +498,7 @@ wheel_build = { cmd = """
     python -c "import os, shutil; os.makedirs('.tmp', exist_ok=True); shutil.copy('pyproject.toml', '.tmp/pyproject-backup.toml'); shutil.copy('pyproject-pypi-gpu.toml', 'pyproject.toml')" && \
     pip wheel . --no-deps --no-build-isolation --wheel-dir=dist && \
     python -c "import shutil; shutil.move('.tmp/pyproject-backup.toml', 'pyproject.toml')"
-""", depends-on = [
+""", env = { CMAKE_PREFIX_PATH = "$CONDA_PREFIX" }, depends-on = [
     "generate_pyproject",
 ], description = "Build GPU wheel for current Python version" }
 
@@ -527,7 +527,7 @@ wheel_build = { cmd = """
     python -c "import os, shutil; os.makedirs('.tmp', exist_ok=True); shutil.copy('pyproject.toml', '.tmp/pyproject-backup.toml'); shutil.copy('pyproject-pypi-gpu.toml', 'pyproject.toml')" && \
     pip wheel . --no-deps --no-build-isolation --wheel-dir=dist && \
     python -c "import shutil; shutil.move('.tmp/pyproject-backup.toml', 'pyproject.toml')"
-""", depends-on = [
+""", env = { CMAKE_PREFIX_PATH = "$CONDA_PREFIX" }, depends-on = [
     "generate_pyproject",
 ], description = "Build GPU wheel for current Python version" }