setup.py

import os
import subprocess
import sys
from setuptools import setup, find_packages, Extension
from setuptools.command.build_ext import build_ext


class CMakeExtension(Extension):
    def __init__(self, name, sourcedir=""):
        Extension.__init__(self, name, sources=[])
        self.sourcedir = os.path.abspath(sourcedir)


class CMakeBuild(build_ext):
    def run(self):
        try:
            out = subprocess.check_output(["cmake", "--version"])
        except OSError:
            raise RuntimeError(
                "CMake must be installed to build the following extensions: "
                + ", ".join(e.name for e in self.extensions)
            )

        for ext in self.extensions:
            self.build_extension(ext)

    def build_extension(self, ext):
        extdir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))
        cmake_args = [
            "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + extdir,
            "-DPYTHON_EXECUTABLE=" + sys.executable,
        ]

        cfg = "Debug" if self.debug else "Release"
        build_args = ["--config", cfg]

        # Add a parallel build option
        build_args += [
            "--",
            "-j",
            "12",
        ]  # Specifies the number of jobs to run simultaneously

        if not os.path.exists(self.build_temp):
            os.makedirs(self.build_temp)

        subprocess.check_call(
            ["cmake", ext.sourcedir] + cmake_args, cwd=self.build_temp
        )
        subprocess.check_call(
            ["cmake", "--build", ".", "--target", ext.name] + build_args,
            cwd=self.build_temp,
        )


setup(
    name="pygemma",
    version="0.1.2",
    author="Nam Tran",
    author_email="namtran.ase@gmail.com",
    description="A Python package with a C++ backend using gemma.",
    long_description="""
    This package provides Python bindings to a C++ library using pybind11.
    """,
    long_description_content_type="text/markdown",
    ext_modules=[CMakeExtension("pygemma")],
    cmdclass=dict(build_ext=CMakeBuild),
    zip_safe=False,
    packages=find_packages(),
    classifiers=[
        "Programming Language :: Python :: 3",
        "License :: OSI Approved :: MIT License",
        "Operating System :: OS Independent",
    ],
    python_requires=">=3.8",
)