switch to pyproject

Makefile

@@ -97,7 +97,7 @@ clean-test: ## remove test and coverage artifacts
 
 .PHONY: dist
 dist: clean-build ## builds source and wheel package
-	python setup.py sdist bdist_wheel
+	python scripts/make-wheel.py
 	twine check dist/*
 
 .PHONY: release

pyproject.toml

@@ -0,0 +1,91 @@
+[build-system]
+requires = ["setuptools>=80", "setuptools-scm>=8"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]
+version_file = "cloup/_version.py"
+
+[project]
+name = "cloup"
+dynamic = ["version"]
+
+description = "Adds features to Click: option groups, constraints, subcommand sections and help themes."
+readme = { file = "README.rst", content-type = "text/x-rst" }
+license = { text = "BSD 3-Clause" }
+
+requires-python = ">= 3.9"
+authors = [
+    { name = "Gianluca Gippetto", email = "[email protected]" },
+]
+
+classifiers = [
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: BSD License",
+    "Natural Language :: English",
+    "Programming Language :: Python :: 3",
+    "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",
+]
+
+
+dependencies = [
+    "click>=8.0,<9.0",
+    "typing_extensions; python_version <= '3.10'",
+]
+
+
+[dependency-groups]
+docs = [
+    "furo",
+    "sphinx",
+    "sphinx-autoapi",
+    "sphinx-autobuild",
+    "sphinx-panels",
+    "sphinx-copybutton",
+    "sphinx-version-warning",
+    "sphinx-issues",
+]
+
+test = [
+    "pytest",
+    "pytest-cov",
+    "pytest-html",
+]
+
+dev = [
+    "build",
+    "flake8",
+    "flake8-pyproject",
+    "mypy",
+    "setuptools-scm",
+    "tox<4",
+    "twine",
+    {include-group = "docs"},
+    {include-group = "test"},
+]
+
+
+[tool.flake8]
+exclude = "docs"
+max-line-length = 90
+
+ignore = [
+    "E241", 
+    "E251", 
+    "W503",
+]
+
+[tool.mypy]
+ignore_missing_imports = true
+
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no covver",
+    "raise NotImplementedError",
+    "...",
+    "if TYPE_CHECKING:",
+]

scripts/make-wheel.py

@@ -0,0 +1,37 @@
+import sys
+import contextlib
+import shutil
+import subprocess
+from pathlib import Path
+
+
+@contextlib.contextmanager
+def backup():
+    saved = []
+
+    def save(path: Path):
+        saved.append((path, path.parent / f"{path.name}.bck"))
+        shutil.copyfile(*saved[-1])
+        return saved[-1][0]
+
+    try:
+        yield save
+    finally:
+        for dst, src in saved:
+            shutil.copyfile(src, dst)
+            src.unlink()
+
+
+def process():
+    with backup() as save:
+        readme = save(Path("README.rst"))
+        print("massaging {readme} ..")
+        txt = readme.read_text()
+        readme.write_text(txt[txt.find(".. docs-index-start") :])
+
+        print("creating wheel ..")
+        subprocess.check_call([sys.executable, "-m", "build", "."])
+
+
+if __name__ == "__main__":
+    process()

tox.ini

@@ -1,4 +1,5 @@
 [tox]
+isolated_build = true
 envlist =
   lint
   mypy
@@ -35,7 +36,9 @@ commands =
 
 [testenv:lint]
 skip_install = true
-deps = flake8
+deps =
+    flake8
+    flake8-pyproject
 commands = flake8 cloup tests examples
 
 [testenv:mypy]