setup.py

"""
Example adapted from: https://github.com/pybind/python_example
"""

from setuptools import setup, Extension
from setuptools.command.build_ext import build_ext
import sys
import setuptools

__version__ = "0.1"


class get_pybind_include(object):
    """
    Helper class to determine the pybind11 include path

    The purpose of this class is to postpone importing pybind11 until it is
    actually installed, so that the ``get_include()`` method can be invoked.
    """
    def __init__(self, user=False):
        self.user = user

    def __str__(self):
        import pybind11
        return pybind11.get_include(self.user)


ext_modules = [
    Extension(
        "awkde.backend",
        ["cpp/backend.cpp"],
        include_dirs=[
            # Path to pybind11 headers
            get_pybind_include(),
            get_pybind_include(user=True)
        ],
        language="c++"
    ),
]


# As of Python 3.6, CCompiler has a `has_flag` method.
# cf http://bugs.python.org/issue26689
def has_flag(compiler, flagname):
    """
    Return a boolean indicating whether a flag name is supported on
    the specified compiler.
    """
    import tempfile
    with tempfile.NamedTemporaryFile("w", suffix=".cpp") as f:
        f.write("int main (int argc, char **argv) { return 0; }")
        try:
            compiler.compile([f.name], extra_postargs=[flagname])
        except setuptools.distutils.errors.CompileError:
            return False
    return True


def cpp_flag(compiler):
    """
    Return the -std=c++[11/14] compiler flag.

    The c++14 is prefered over c++11 (when it is available).
    """
    if has_flag(compiler, "-std=c++14"):
        return "-std=c++14"
    elif has_flag(compiler, "-std=c++11"):
        return "-std=c++11"
    else:
        raise RuntimeError("Unsupported compiler -- at least C++11 support "
                           "is needed!")


class BuildExt(build_ext):
    """A custom build extension for adding compiler-specific options."""
    c_opts = {
        "msvc": ["/EHsc"],
        "unix": [],
    }

    if sys.platform == "darwin":
        c_opts["unix"] += ["-stdlib=libc++", "-mmacosx-version-min=10.7"]

    def build_extensions(self):
        ct = self.compiler.compiler_type
        opts = self.c_opts.get(ct, [])
        if ct == "unix":
            opts.append('-DVERSION_INFO="%s"' % self.distribution.get_version())
            opts.append(cpp_flag(self.compiler))
            if has_flag(self.compiler, "-fvisibility=hidden"):
                opts.append("-fvisibility=hidden")
        elif ct == "msvc":
            opts.append('/DVERSION_INFO=\\"%s\\"' %
                        self.distribution.get_version())
        for ext in self.extensions:
            ext.extra_compile_args = opts
        build_ext.build_extensions(self)


setup(
    name="awkde",
    version=__version__,
    author="Thorben Menne",
    author_email="thorben.menne@tu-dortmund.de",
    url="https://github.com/mennthor/awkde",
    description="Adaptive width gaussian KDE",
    long_description="",
    ext_modules=ext_modules,
    install_requires=["numpy", "scipy", "scikit-learn", "pybind11", "future"],
    cmdclass={"build_ext": BuildExt},
    zip_safe=False,
)