Introduce pyproject.toml

It declares the project-level metadata (previously found in setup.py),
declares setuptools as its build system, and includes the contents of
the now removed pytest.ini.

Signed-off-by: Rodrigo Tobar <[email protected]>

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## Development
 
+* Use `pyproject.toml` to declare project metadata and configuration,
+  including declaring its build dependency and build system (setuptools),
+  moving most static content from `setup.py` to `pyproject.toml`,
+  and moving the `pytest` configuration out from `pytest.ini` too.
+
 ## [2.7.1]
 
 * Actually advertise that our C extension supports

pyproject.toml

@@ -0,0 +1,36 @@
+[build-system]
+requires = ["setuptools >= 61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "crc32c"
+version = "2.7.1"
+authors = [
+    { name = "Rodrigo Tobar", email = "[email protected]" },
+]
+description = "A python package implementing the crc32c algorithm in hardware and software"
+readme = "README.rst"
+license = { text = "LGPL-2.1-or-later" }
+requires-python = ">=3.7"
+classifiers = [
+    # There's no more specific classifier for LGPLv2.1+
+    "License :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)",
+    "Operating System :: OS Independent",
+    "Programming Language :: C",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+]
+
+[project.urls]
+github = "https://github.com/ICRAR/crc32c"
+changelog = "https://github.com/ICRAR/crc32c/blob/master/CHANGELOG.md"
+issues = "https://github.com/ICRAR/crc32c/issues"
+
+[tool.pytest.ini_options]
+markers =
+  calculates_crc32c: Mark a test as needing crc32c working

setup.py

@@ -32,40 +32,10 @@
     include_dirs=["src/cc32c/ext/"],
 )
 
-classifiers = [
-    # There's no more specific classifier for LGPLv2.1+
-    "License :: OSI Approved :: GNU Lesser General Public License v2 or later (LGPLv2+)",
-    "Operating System :: OS Independent",
-    "Programming Language :: C",
-    "Programming Language :: Python :: 3.7",
-    "Programming Language :: Python :: 3.8",
-    "Programming Language :: Python :: 3.9",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.12",
-    "Programming Language :: Python :: 3.13",
-]
-
-with open("README.rst", "rt") as f:
-    long_description = f.read()
-
 setup(
-    name="crc32c",
-    author="The ICRAR DIA Team",
-    url="https://github.com/ICRAR/crc32c",
-    author_email="[email protected]",
-    version="2.7.1",
-    license="LGPL-2.1-or-later",
-    description=(
-        "A python package implementing the crc32c algorithm" " in hardware and software"
-    ),
-    long_description=long_description,
-    long_description_content_type="text/x-rst",
-    classifiers=classifiers,
     packages=["crc32c"],
     package_dir={"": "src"},
     package_data={"crc32c": ["*.pyi", "py.typed", "ext/*.h"]},
-    python_requires=">=3.7",
     ext_modules=[crcmod_ext],
     test_suite="test",
 )