setup

Complexity

Total Complexity

6

Size/Duplication

Total Lines	107
Duplicated Lines	0 %

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	BinaryDistribution.has_ext_modules()	0	2	1
A	OptionalBuildExt._unavailable()	0	15	1
A	OptionalBuildExt.run()	0	6	2

#!/usr/bin/env python
import os
import re
from pathlib import Path

from setuptools import Extension
from setuptools import find_namespace_packages
from setuptools import setup
from setuptools.command.build_ext import build_ext
from setuptools.dist import Distribution

try:
    # Allow installing package without any Cython available. This
    # assumes you are going to include the .c files in your sdist.
    import Cython
except ImportError:
    Cython = None

# Enable code coverage for C code: we cannot use CFLAGS=-coverage in tox.ini, since that may mess with compiling
# dependencies (e.g. numpy). Therefore, we set SETUPPY_CFLAGS=-coverage in tox.ini and copy it to CFLAGS here (after
# deps have been safely installed).
if "TOX_ENV_NAME" in os.environ and os.environ.get("SETUPPY_EXT_COVERAGE") == "yes":
    CFLAGS = os.environ["CFLAGS"] = "-DCYTHON_TRACE=1 -DCYTHON_USE_SYS_MONITORING=0"
    LFLAGS = os.environ["LFLAGS"] = ""
else:
    CFLAGS = ""
    LFLAGS = ""

allow_extensions = True
# Enable this if the extensions will not build on PyPy
# if '__pypy__' in sys.builtin_module_names:
#     print('NOTICE: C extensions disabled on PyPy (would be broken)!')
#     allow_extensions = False
if os.environ.get("SETUPPY_FORCE_PURE"):
    print("NOTICE: C extensions disabled (SETUPPY_FORCE_PURE)!")
    allow_extensions = False


class OptionalBuildExt(build_ext):
    """
    Allow the building of C extensions to fail.
    """

    def run(self):
        try:
            super().run()
        except Exception as e:
            self._unavailable(e)
            self.extensions = []  # avoid copying missing files (it would fail).

    def _unavailable(self, e):
        print("*" * 80)
        print(
            """WARNING:

    An optional code optimization (C extension) could not be compiled.

    Optimizations for this package will not be available!
            """
        )

        print("CAUSE:")
        print("")
        print("    " + repr(e))
        print("*" * 80)


class BinaryDistribution(Distribution):
    """
    Distribution which almost always forces a binary package with platform name
    """

    def has_ext_modules(self):
        return super().has_ext_modules() or not os.environ.get("SETUPPY_ALLOW_PURE")


def read(*names, **kwargs):
    with Path(__file__).parent.joinpath(*names).open(encoding=kwargs.get("encoding", "utf8")) as fh:
        return fh.read()


setup(
    long_description="{}\n{}".format(
        re.compile("^.. start-badges.*^.. end-badges", re.M | re.S).sub("", read("README.rst")),
        re.sub(":[a-z]+:`~?(.*?)`", r"``\1``", read("CHANGELOG.rst")),
    ),
    long_description_content_type="text/x-rst",
    packages=find_namespace_packages("src"),
    package_dir={"": "src"},
    py_modules=[path.stem for path in Path("src").glob("*.py")],
    include_package_data=True,
    zip_safe=False,
    cmdclass={"build_ext": OptionalBuildExt},
    ext_modules=[
        Extension(
            str(path.relative_to("src").with_suffix("")).replace(os.sep, "."),
            sources=[str(path)],
            extra_compile_args=CFLAGS.split(),
            extra_link_args=LFLAGS.split(),
            include_dirs=[str(path.parent)],
        )
        for path in Path("src").glob("**/*.pyx" if Cython else "**/*.c")
    ]
    if allow_extensions
    else [],
    distclass=BinaryDistribution if allow_extensions else None,
)