setup.py

import os
import re
import sys
import platform
import subprocess

from setuptools import setup, Extension
from setuptools.command.build_ext import build_ext
from distutils.version import LooseVersion

try:
    from wheel.bdist_wheel import bdist_wheel
except ImportError:
    bdist_wheel = None

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))

        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]

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

        if platform.system() == "Windows":
            cmake_args += ['-G', 'MSYS Makefiles']
            cmake_args += ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY_{}={}'.format(cfg.upper(), extdir)]
        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)

cmdclass = dict()
cmdclass['build_ext'] = CMakeBuild
if bdist_wheel:
    cmdclass['bdist_wheel'] = bdist_wheel

long_description = \
"""
The PiTensor package is a Python wrapper for the ITensor package
(http://itensor.org), a C++ library for implementing tensor network calculations
"""

setup(
    name='pitensor',
    version='0.2.0.dev1',
    description='Python wrapper for ITensor',
    long_description=long_description,
    classifiers=[
        'Development Status :: 2 - Alpha',
        'Intended Audience :: Science/Research',
        'License :: OSI Approved :: MIT License',
        'Programming Language :: Python :: 3 :: Only',
        'Programming Language :: C++',
        'Topic :: Scientific/Engineering :: Physics',
    ],
    keywords='itensor tensornetwork dmrg',
    url='http://github.com/kyungminlee/PiTensor',
    author='Kyungmin Lee',
    author_email='kyungmin.lee.42@gmail.com',
    license='MIT',
    ext_modules=[CMakeExtension('pitensor')],
    cmdclass=cmdclass,
    zip_safe=False,
)