Move metadata from setup.py to setup.cfg

Using https://github.com/asottile/setup-py-upgrade

Refs #719.

setup.cfg

@@ -1,5 +1,61 @@
 [metadata]
+name = pytest-xdist
+description = pytest xdist plugin for distributed testing and loop-on-failing modes
+long_description = file: README.rst
+license = MIT
+author = holger krekel and contributors
+author_email = pytest-dev@python.org,holger@merlinux.eu
+url = https://github.com/pytest-dev/pytest-xdist
+platforms =
+    linux
+    osx
+    win32
+classifiers =
+    Development Status :: 5 - Production/Stable
+    Framework :: Pytest
+    Intended Audience :: Developers
+    License :: OSI Approved :: MIT License
+    Operating System :: POSIX
+    Operating System :: Microsoft :: Windows
+    Operating System :: MacOS :: MacOS X
+    Topic :: Software Development :: Testing
+    Topic :: Software Development :: Quality Assurance
+    Topic :: Utilities
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
 license_file = LICENSE
 
+[options]
+packages = find:
+package_dir = =src
+zip_safe = False
+python_requires = >=3.6
+install_requires =
+    execnet>=1.1
+    pytest>=6.0.0
+    pytest-forked
+setup_requires = setuptools_scm
+
+[options.packages.find]
+where = src
+
+[options.entry_points]
+pytest11 =
+    xdist = xdist.plugin
+    xdist.looponfail = xdist.looponfail
+
+[options.extras_require]
+testing =
+    filelock
+    pytest
+psutil = psutil>=3.0
+setproctitle = setproctitle
+
 [flake8]
 max-line-length = 100

setup.py

@@ -1,53 +1,6 @@
-from setuptools import setup, find_packages
+from setuptools import setup
 
-install_requires = ["execnet>=1.1", "pytest>=6.0.0", "pytest-forked"]
+if __name__ == "__main__":
-
+    setup(
-
+        use_scm_version={"write_to": "src/xdist/_version.py"},
-with open("README.rst") as f:
+    )
-    long_description = f.read()
-
-setup(
-    name="pytest-xdist",
-    use_scm_version={"write_to": "src/xdist/_version.py"},
-    description="pytest xdist plugin for distributed testing and loop-on-failing modes",
-    long_description=long_description,
-    license="MIT",
-    author="holger krekel and contributors",
-    author_email="pytest-dev@python.org,holger@merlinux.eu",
-    url="https://github.com/pytest-dev/pytest-xdist",
-    platforms=["linux", "osx", "win32"],
-    packages=find_packages(where="src"),
-    package_dir={"": "src"},
-    extras_require={
-        "testing": ["filelock"],
-        "psutil": ["psutil>=3.0"],
-        "setproctitle": ["setproctitle"],
-    },
-    entry_points={
-        "pytest11": ["xdist = xdist.plugin", "xdist.looponfail = xdist.looponfail"]
-    },
-    zip_safe=False,
-    python_requires=">=3.6",
-    install_requires=install_requires,
-    setup_requires=["setuptools_scm"],
-    classifiers=[
-        "Development Status :: 5 - Production/Stable",
-        "Framework :: Pytest",
-        "Intended Audience :: Developers",
-        "License :: OSI Approved :: MIT License",
-        "Operating System :: POSIX",
-        "Operating System :: Microsoft :: Windows",
-        "Operating System :: MacOS :: MacOS X",
-        "Topic :: Software Development :: Testing",
-        "Topic :: Software Development :: Quality Assurance",
-        "Topic :: Utilities",
-        "Programming Language :: Python",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3 :: Only",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Programming Language :: Python :: 3.10",
-    ],
-)