setup.py

'''
pyMilk setup.py
'''

import os
import re
import sys
import platform
import subprocess
from distutils.version import LooseVersion

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 CMakeBuildExt(build_ext):

    def run(self):
        try:
            import pybind11  # Will raise ModuleNotFoundError
            if pybind11.version_info < (2, 11):
                raise ModuleNotFoundError('pybind version nok')
            out = subprocess.check_output(['cmake', '--version'
                                           ])  # Will raise FileNotFoundError
        except:
            raise RuntimeError(
                    "CMake and pybind11 must be installed to build the following extensions: "
                    + ", ".join(e.name for e in self.extensions) +
                    "\n and pybind must be > 2.11 (pip install --upgrade pybind11)"
            )

        if platform.system() == "Windows":
            cmake_version = LooseVersion(
                    re.search(r'version\s*([\d.]+)',
                              out.decode()).group(1))  # type: ignore
            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)

        # build_ext.run()

    def build_extension(self, ext):
        self.announce("Preparing the build environment", level=3)

        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]

        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 += ['--', '-j%d' % os.cpu_count()]  #, 'VERBOSE=1']

        if "CUDA_ROOT" in os.environ:
            if os.path.isfile('{}/bin/gcc'.format(os.environ["CUDA_ROOT"])):
                cmake_args += [
                        '-DCMAKE_C_COMPILER={}/bin/gcc'.format(
                                os.environ["CUDA_ROOT"])
                ]
            if os.path.isfile('{}/bin/g++'.format(os.environ["CUDA_ROOT"])):
                cmake_args += [
                        '-DCMAKE_CXX_COMPILER={}/bin/g++'.format(
                                os.environ["CUDA_ROOT"])
                ]
            cmake_args += ['-DUSE_CUDA=ON']
        else:
            cmake_args += ['-DUSE_CUDA=OFF']

        cmake_args += ['-Dbuild_python_module=ON']

        os.makedirs(self.build_temp, exist_ok=True)

        self.announce("Configuring cmake project", level=3)
        subprocess.check_call(['cmake', ext.sourcedir] + cmake_args,
                              cwd=self.build_temp)
        subprocess.check_call(['cmake', '--build', '.'] + build_args,
                              cwd=self.build_temp)


with open("README.md", 'r') as f:
    long_description = f.read()

setup(
        packages=['pyMilk'],  # same as name
        ext_modules=[CMakeExtension('ImageStreamIO')],
        cmdclass=dict(build_ext=CMakeBuildExt),
        long_description=long_description)