setup.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import os
import re
import sys

from setuptools import find_packages, setup


def get_metadata(metadata_file):
    with open(metadata_file) as stream:
        text = stream.read()

        ex = r"__(\w*?)__\s*?=\s*?[\"\']([^\"\']*)"
        items = re.findall(ex, text)
        metadata = {key: value for key, value in items}

        metadata["keywords"] = metadata.get("keywords", "").split(", ")

        ex = r'"{3}[^\w]*(?P<name>[^\s]*)[^\w]+(?P<description>.*)'
        match_ = re.search(ex, text)

        assert match_ is not None
        metadata.update(match_.groupdict())

    return metadata


ex = r"# ([^\s:]+).*\n([^#]+)"
requirements_prog = re.compile(ex)


def get_requirements(requirements):
    with open(requirements) as stream:
        matches = requirements_prog.findall(stream.read())
        requires = {key: value.strip().splitlines() for key, value in matches}

    return requires


def main():
    if sys.version_info < (3, 6):
        raise RuntimeError("Peony requires Python 3.6+")

    dirname = os.path.dirname(__file__)

    # get metadata and keywords from peony/__init__.py
    kwargs = get_metadata(os.path.join(dirname, "peony", "__init__.py"))

    # get requirements from requirements.txt
    kwargs.update(get_requirements(os.path.join(dirname, "requirements.txt")))

    # get extras requirements from extras_require.txt
    extras = os.path.join(dirname, "extras_require.txt")
    extras_require = get_requirements(extras)

    # get long description from README.md
    with open("README.rst") as stream:
        long_description = stream.read()

    setup(
        long_description=long_description,
        packages=find_packages(include=["peony*"]),
        extras_require=extras_require,
        python_requires=">=3.6",
        **kwargs
    )


if __name__ == "__main__":
    main()