Move setup information to declarative setup.cfg (#495)

Use a declarative syntax to avoid mixing code and configuration.
Simplifies handling of long description and version by reducing some
boilerplate.

For details on this setuptools feature, see:
https://setuptools.readthedocs.io/en/latest/setuptools.html#configuring-setup-using-setup-cfg-files

setup.cfg

@@ -0,0 +1,49 @@
+[metadata]
+name = PyJWT
+version = attr: jwt.__version__
+author = Jose Padilla
+author_email = hello@jpadilla.com
+description = JSON Web Token implementation in Python
+license = MIT
+keywords =
+    json
+    jwt
+    security
+    signing
+    token
+    web
+url = https://github.com/jpadilla/pyjwt
+long_description = file: README.rst
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Developers
+    Natural Language :: English
+    License :: OSI Approved :: MIT License
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Topic :: Utilities
+
+[options]
+python_requires = >=3.5
+packages = find:
+
+[options.entry_points]
+console_scripts =
+    pyjwt = jwt.__main__:main
+
+[options.extras_require]
+crypto =
+    cryptography >= 1.4
+tests =
+    pytest>=4.0.1,<5.0.0
+    pytest-cov>=2.6.0,<3.0.0
+
+[options.packages.find]
+exclude =
+    tests
+    tests.*

setup.py

@@ -1,74 +1,5 @@
 #!/usr/bin/env python3
 
-import os
-import re
-import sys
+from setuptools import setup
 
-from setuptools import find_packages, setup
-
-
-def get_version(package):
-    """
-    Return package version as listed in `__version__` in `init.py`.
-    """
-    with open(os.path.join(package, "__init__.py"), "rb") as init_py:
-        src = init_py.read().decode("utf-8")
-        return re.search("__version__ = ['\"]([^'\"]+)['\"]", src).group(1)
-
-
-version = get_version("jwt")
-
-with open(os.path.join(os.path.dirname(__file__), "README.rst")) as readme:
-    long_description = readme.read()
-
-if sys.argv[-1] == "publish":
-    if os.system("pip freeze | grep twine"):
-        print("twine not installed.\nUse `pip install twine`.\nExiting.")
-        sys.exit()
-    os.system("python setup.py sdist bdist_wheel")
-    os.system("twine upload dist/*")
-    print("You probably want to also tag the version now:")
-    print(" git tag -a {0} -m 'version {0}'".format(version))
-    print(" git push --tags")
-    sys.exit()
-
-EXTRAS_REQUIRE = {
-    "tests": ["pytest>=4.0.1,<5.0.0", "pytest-cov>=2.6.0,<3.0.0"],
-    "crypto": ["cryptography >= 1.4"],
-}
-
-EXTRAS_REQUIRE["dev"] = (
-    EXTRAS_REQUIRE["tests"] + EXTRAS_REQUIRE["crypto"] + ["mypy", "pre-commit"]
-)
-
-setup(
-    name="PyJWT",
-    version=version,
-    author="Jose Padilla",
-    author_email="hello@jpadilla.com",
-    description="JSON Web Token implementation in Python",
-    license="MIT",
-    keywords="jwt json web token security signing",
-    url="https://github.com/jpadilla/pyjwt",
-    packages=find_packages(
-        exclude=["*.tests", "*.tests.*", "tests.*", "tests"]
-    ),
-    long_description=long_description,
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Intended Audience :: Developers",
-        "Natural Language :: English",
-        "License :: OSI Approved :: MIT License",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Topic :: Utilities",
-    ],
-    python_requires=">=3.5",
-    extras_require=EXTRAS_REQUIRE,
-    entry_points={"console_scripts": ["pyjwt = jwt.__main__:main"]},
-)
+setup()

tox.ini

@@ -17,11 +17,11 @@ deps =
 
 
 [testenv:typing]
-extras = dev
+deps = mypy
 commands = mypy --ignore-missing-imports jwt
 
 
 [testenv:lint]
-extras = dev
+deps = pre-commit
 passenv = HOMEPATH  # needed on Windows
 commands = pre-commit run --all-files