setup.py

# -*- coding: utf-8 -*-
import os
import subprocess
from setuptools import setup, 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 build_extension(self, ext):
        extdir = os.path.abspath(os.path.dirname(self.get_ext_fullpath(ext.name)))

        # required for auto-detection of auxiliary "native" libs
        if not extdir.endswith(os.path.sep):
            extdir += os.path.sep

        cmake_args = [
            "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY={}".format(extdir),
            "-DCMAKE_BUILD_TYPE={}".format("Release"),  # not used on MSVC, but no harm
        ]
        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", "."], cwd=self.build_temp
        )


# The information here can also be placed in setup.cfg - better separation of
# logic and declaration, and simpler if you include description/version in a file.
setup(
    name="pygpg",
    version="0.0.1",
    author="Hongzhuo Liang",
    author_email="liang@informati.uni-hamburg.de",
    description="A binding of gpg using pybind11 and CMake",
    long_description="",
    ext_modules=[CMakeExtension("pygpg")],
    cmdclass={"build_ext": CMakeBuild},
    zip_safe=False,
)