Migrated the metadata into setup.cfg from setup.py.

Added a section to `pyproject.toml` according to `PEP 517`.
Version is now fetched automatically from git tags using `setuptools_scm`.

.gitignore

@@ -1,5 +1,5 @@
 # Add any project-specific files here:
-
+sniffio/_version.py
 
 # Sphinx docs
 docs/build/

ci.sh

@@ -43,8 +43,8 @@ EOF
     exit 0
 fi
 
-python setup.py sdist --formats=zip
-pip install dist/*.zip
+python -m build -nsx .
+pip install dist/*.tar.gz
 
 # Actual tests
 pip install -Ur test-requirements.txt

pyproject.toml

@@ -1,3 +1,11 @@
+[build-system]
+requires = ["setuptools>=42.2", "setuptools_scm[toml]>=3.4.3"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+write_to = "sniffio/_version.py"
+write_to_template = "__version__ = \"{version}\"\n"
+
 [tool.towncrier]
 package = "sniffio"
 filename = "docs/source/history.rst"

setup.cfg

@@ -0,0 +1,30 @@
+[metadata]
+name = sniffio
+author = Nathaniel J. Smith
+author_email = [email protected]
+license = MIT OR Apache-2.0
+description = Sniff out which async library your code is running under
+long_description = file: README.rst
+keywords = async, trio, asyncio
+url = https://github.com/python-trio/sniffio
+classifiers =
+    License :: OSI Approved :: MIT License
+    License :: OSI Approved :: Apache Software License
+    Framework :: Trio
+    Framework :: AsyncIO
+    Operating System :: POSIX :: Linux
+    Operating System :: MacOS :: MacOS X
+    Operating System :: Microsoft :: Windows
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
+    Intended Audience :: Developers
+    Development Status :: 5 - Production/Stable
+
+[options]
+packages = find:
+python_requires = >=3.7
+tests_require = curio
+
+[options.package_data]
+sniffio = py.typed