setup.py

import re

from setuptools import setup

requirements = []
with open("requirements.txt") as f:
    requirements = f.read().splitlines()

version = ""
with open("discord/__init__.py") as f:
    version = re.search(
        r'^__version__\s*=\s*[\'"]([^\'"]*)[\'"]', f.read(), re.MULTILINE
    ).group(1)

if not version:
    raise RuntimeError("version is not set")

if version.endswith(("a", "b", "rc")):
    # append version identifier based on commit count
    try:
        import subprocess

        p = subprocess.Popen(
            ["git", "rev-list", "--count", "HEAD"],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
        )
        out, err = p.communicate()
        if out:
            version += out.decode("utf-8").strip()
        p = subprocess.Popen(
            ["git", "rev-parse", "--short", "HEAD"],
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
        )
        out, err = p.communicate()
        if out:
            version += "+g" + out.decode("utf-8").strip()
    except Exception:
        pass

readme = ""
with open("README.rst") as f:
    readme = f.read()

extras_require = {
    "voice": ["PyNaCl==1.3.0"],
    "docs": [
        "sphinx==1.8.5",
        "sphinxcontrib_trio==1.1.1",
        "sphinxcontrib-websupport",
    ],
}

setup(
    name="discord.py",
    author="Rapptz",
    url="https://github.com/Rapptz/discord.py",
    project_urls={
        "Documentation": "https://discordpy.readthedocs.io/en/latest/",
        "Issue tracker": "https://github.com/Rapptz/discord.py/issues",
    },
    version=version,
    packages=["discord", "discord.ext.commands", "discord.ext.tasks"],
    license="MIT",
    description="A Python wrapper for the Discord API",
    long_description=readme,
    long_description_content_type="text/x-rst",
    include_package_data=True,
    install_requires=requirements,
    extras_require=extras_require,
    python_requires=">=3.5.3",
    classifiers=[
        "Development Status :: 5 - Production/Stable",
        "License :: OSI Approved :: MIT License",
        "Intended Audience :: Developers",
        "Natural Language :: English",
        "Operating System :: OS Independent",
        "Programming Language :: Python :: 3.5",
        "Programming Language :: Python :: 3.6",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
        "Topic :: Internet",
        "Topic :: Software Development :: Libraries",
        "Topic :: Software Development :: Libraries :: Python Modules",
        "Topic :: Utilities",
    ],
)