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import inspect
import os
import sys
from pathlib import Path
import cmake_build_extension
import setuptools
# Importing the bindings inside the build_extension_env context manager is necessary only
# in Windows with Python>=3.8.
# See https://github.com/diegoferigo/cmake-build-extension/issues/8.
# Note that if this manager is used in the init file, cmake-build-extension becomes an
# install_requires that must be added to the setup.cfg. Otherwise, cmake-build-extension
# could only be listed as build-system requires in pyproject.toml since it would only
# be necessary for packaging and not during runtime.
init_py = inspect.cleandoc(
"""
import cmake_build_extension
with cmake_build_extension.build_extension_env():
from . import bindings
"""
)
# Extra options passed to the CI/CD pipeline that uses cibuildwheel
CIBW_CMAKE_OPTIONS = []
if "CIBUILDWHEEL" in os.environ and os.environ["CIBUILDWHEEL"] == "1":
# The manylinux variant runs in Debian Stretch and it uses lib64 folder
if sys.platform == "linux":
CIBW_CMAKE_OPTIONS += ["-DCMAKE_INSTALL_LIBDIR=lib"]
# Eigen is not found when installed with vcpkg because we don't pass the toolchain.
# Passing directly the right folder as workaround. This is meant to work just in CI.
if os.name == "nt":
CIBW_CMAKE_OPTIONS += [
"-DEigen3_DIR:PATH=C:/vcpkg/packages/eigen3_x64-windows/share/eigen3",
]
# This example is compliant with PEP517 and PEP518. It uses the setup.cfg file to store
# most of the package metadata. However, build extensions are not supported and must be
# configured in the setup.py.
setuptools.setup(
# The resulting "mymath" archive contains two packages: mymath_swig and mymath_pybind.
# This approach separates the two bindings types, typically just one of them is used.
ext_modules=[
cmake_build_extension.CMakeExtension(
# This could be anything you like, it is used to create build folders
name="SwigBindings",
# Name of the resulting package name (import mymath_swig)
install_prefix="mymath_swig",
# Exposes the binary print_answer to the environment.
# It requires also adding a new entry point in setup.cfg.
expose_binaries=["bin/print_answer"],
# Writes the content to the top-level __init__.py
write_top_level_init=init_py,
# Selects the folder where the main CMakeLists.txt is stored
# (it could be a subfolder)
source_dir=str(Path(__file__).parent.absolute()),
cmake_configure_options=[
# This option points CMake to the right Python interpreter, and helps
# the logic of FindPython3.cmake to find the active version
f"-DPython3_ROOT_DIR={Path(sys.prefix)}",
"-DCALL_FROM_SETUP_PY:BOOL=ON",
"-DBUILD_SHARED_LIBS:BOOL=OFF",
# Select the bindings implementation
"-DEXAMPLE_WITH_SWIG:BOOL=ON",
"-DEXAMPLE_WITH_PYBIND11:BOOL=OFF",
]
+ CIBW_CMAKE_OPTIONS,
),
cmake_build_extension.CMakeExtension(
name="Pybind11Bindings",
# Name of the resulting package name (import mymath_pybind11)
install_prefix="mymath_pybind11",
# Note: pybind11 is a build-system requirement specified in pyproject.toml,
# therefore pypa/pip or pypa/build will install it in the virtual
# environment created in /tmp during packaging.
# This cmake_depends_on option adds the pybind11 installation path
# to CMAKE_PREFIX_PATH so that the example finds the pybind11 targets
# even if it is not installed in the system.
cmake_depends_on=["pybind11"],
# Exposes the binary print_answer to the environment.
# It requires also adding a new entry point in setup.cfg.
expose_binaries=["bin/print_answer"],
# Writes the content to the top-level __init__.py
write_top_level_init=init_py,
# Selects the folder where the main CMakeLists.txt is stored
# (it could be a subfolder)
source_dir=str(Path(__file__).parent.absolute()),
cmake_configure_options=[
# This option points CMake to the right Python interpreter, and helps
# the logic of FindPython3.cmake to find the active version
f"-DPython3_ROOT_DIR={Path(sys.prefix)}",
"-DCALL_FROM_SETUP_PY:BOOL=ON",
"-DBUILD_SHARED_LIBS:BOOL=OFF",
# Select the bindings implementation
"-DEXAMPLE_WITH_SWIG:BOOL=OFF",
"-DEXAMPLE_WITH_PYBIND11:BOOL=ON",
]
+ CIBW_CMAKE_OPTIONS,
),
],
cmdclass=dict(
# Enable the CMakeExtension entries defined above
build_ext=cmake_build_extension.BuildExtension,
# If the setup.py or setup.cfg are in a subfolder wrt the main CMakeLists.txt,
# you can use the following custom command to create the source distribution.
# sdist=cmake_build_extension.GitSdistFolder
),
)
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