Move most of the metadata from setup.py to setup.cfg

Author: althonos

setup.cfg

@@ -2,14 +2,63 @@
 universal = 1
 
 [metadata]
+version = attr: fs._version.__version__
+name = fs
+author = Will McGugan
+author_email = will@willmcgugan.com
+maintainer = Martin Larralde
+maintainer_email = martin.larralde@embl.de
+url = https://github.com/PyFilesystem/pyfilesystem2
+license = MIT
 license_file = LICENSE
+description = Python's filesystem abstraction layer
 long_description = file: README.md
 long_description_content_type = text/markdown
+platform = any
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Intended Audience :: Developers
+    License :: OSI Approved :: MIT License
+    Operating System :: OS Independent
+    Programming Language :: Python
+    Programming Language :: Python :: 2.7
+    Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
+    Topic :: System :: Filesystems
 project_urls =
     Bug Reports = https://github.com/PyFilesystem/pyfilesystem2/issues
     Documentation = https://pyfilesystem2.readthedocs.io/en/latest/
     Wiki = https://www.pyfilesystem.org/
 
+[options]
+zip_safe = false
+packages = find:
+setup_requires =
+    setuptools >=38.3.0
+install_requires =
+    appdirs~=1.4.3
+    pytz
+    setuptools
+    six ~=1.10
+    enum34 ~=1.1.6      ;  python_version < '3.4'
+    typing ~=3.6        ;  python_version < '3.6'
+    backports.os ~=0.1  ;  python_version < '3.0'
+
+[options.extras_require]
+scandir =
+    scandir~=1.5        ;  python_version < '3.5'
+
+[options.packages.find]
+exclude = tests
+
+[options.package_data]
+fs = py.typed
+
 [pydocstyle]
 inherit = false
 ignore = D102,D105,D200,D203,D213,D406,D407

setup.py

@@ -1,47 +1,4 @@
 #!/usr/bin/env python
 
-from setuptools import setup, find_packages
-
-with open("fs/_version.py") as f:
-    exec(f.read())
-
-CLASSIFIERS = [
-    "Development Status :: 5 - Production/Stable",
-    "Intended Audience :: Developers",
-    "License :: OSI Approved :: MIT License",
-    "Operating System :: OS Independent",
-    "Programming Language :: Python",
-    "Programming Language :: Python :: 2.7",
-    "Programming Language :: Python :: 3.4",
-    "Programming Language :: Python :: 3.5",
-    "Programming Language :: Python :: 3.6",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: Implementation :: CPython",
-    "Programming Language :: Python :: Implementation :: PyPy",
-    "Topic :: System :: Filesystems",
-]
-
-REQUIREMENTS = ["appdirs~=1.4.3", "pytz", "setuptools", "six~=1.10"]
-
-setup(
-    author="Will McGugan",
-    author_email="will@willmcgugan.com",
-    classifiers=CLASSIFIERS,
-    description="Python's filesystem abstraction layer",
-    install_requires=REQUIREMENTS,
-    extras_require={
-        "scandir :python_version < '3.5'": ["scandir~=1.5"],
-        ":python_version < '3.4'": ["enum34~=1.1.6"],
-        ":python_version < '3.6'": ["typing~=3.6"],
-        ":python_version < '3.0'": ["backports.os~=0.1"],
-    },
-    license="MIT",
-    name="fs",
-    packages=find_packages(exclude=("tests",)),
-    package_data={"fs": ["py.typed"]},
-    zip_safe=False,
-    platforms=["any"],
-    url="https://github.com/PyFilesystem/pyfilesystem2",
-    version=__version__,
-)
+from setuptools import setup
+setup()