setup.py

# -*- coding: utf-8 -*-
from distutils.version import LooseVersion
from pathlib import Path
from setuptools import find_packages, Extension
from setuptools.command.build_ext import build_ext
import os
import platform
import re
import setuptools
import shutil
import subprocess
import sys
with open("README.md", "r") as fh:
    long_description = fh.read()


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))  # noqa: W503

        if platform.system() == "Windows":
            cmake_version = LooseVersion(re.search(r'version\s*([\d.]+)',
                                                   out.decode()).group(1))
            if cmake_version < '3.1.0':
                raise RuntimeError("CMake >= 3.1.0 is required on Windows")

        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,
                      '-DBUILD_PYTHON_LIB=ON']

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

        if platform.system() == "Windows":
            cmake_args += ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}'.format(
                cfg.upper(),
                extdir)]
            if sys.maxsize > 2**32:
                cmake_args += ['-A', 'x64']
            build_args += ['--', '/m']
        else:
            cmake_args += ['-DCMAKE_BUILD_TYPE=' + cfg]
            build_args += ['--', '-j2']

        env = os.environ.copy()
        env['CXXFLAGS'] = '{} -DVERSION_INFO=\\"{}\\"'.format(
            env.get('CXXFLAGS', ''),
            self.distribution.get_version())
        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, env=env)
        subprocess.check_call(['cmake', '--build', '.'] + build_args,
                              cwd=self.build_temp)
        if platform.system() == "Windows":
            dll_files = list(Path(os.path.abspath(self.build_temp)).rglob("filepattern.dll"))
            if len(dll_files) > 0:
                for file in dll_files:
                    print(f"Copying ${file.as_posix()} -> {extdir}")
                    shutil.copy(file.as_posix(), extdir)

        print()  # Add an empty line for cleaner output\


setuptools.setup(
    # Metadata now comes from pyproject.toml
    # Keep only the custom build configuration here
    cmdclass={'build_ext': CMakeBuild},
    ext_modules=[CMakeExtension('filepattern/backend')],
)