Migrate to setuptools 77 with PEP 639 and drop Python 3.8/3.9

- Switch from hatchling to setuptools>=77 build backend
- Use modern PEP 639 license specifiers (license-files)
- Configure setuptools_scm to write version to _version.py
- Drop Python 3.8 and 3.9 support (requires-python >= 3.10)
- Add SETUPTOOLS_SCM_OVERRIDES_FOR_INICONFIG to use no-local-version
  scheme on main branch instead of SETUPTOOLS_SCM_PRETEND_VERSION hack
- Remove hatch configuration and test environments

This modernizes the build system and uses setuptools_scm's official
override mechanism for controlling version schemes per branch.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: RonnyPfannschmidt

.github/workflows/test.yml

@@ -22,6 +22,8 @@ jobs:
         uses: hynek/build-and-inspect-python-package@v2
         with:
           attest-build-provenance-github: true
+        env:
+          SETUPTOOLS_SCM_OVERRIDES_FOR_INICONFIG: ${{ github.ref == 'refs/heads/main' && 'local_scheme="no-local-version"' || '' }}
 
   test:
     needs: build-and-inspect

pyproject.toml

@@ -1,30 +1,28 @@
 [build-system]
-build-backend = "hatchling.build"
+build-backend = "setuptools.build_meta"
 requires = [
-  "hatch-vcs",
-  "hatchling>=1.26",
+  "setuptools>=77",
+  "setuptools-scm>=8",
 ]
 
 [project]
 name = "iniconfig"
 description = "brain-dead simple config-ini parsing"
 readme = "README.rst"
 license = "MIT"
+license-files = [ "LICENSE" ]
 authors = [
   { name = "Ronny Pfannschmidt", email = "opensource@ronnypfannschmidt.de" },
   { name = "Holger Krekel", email = "holger.krekel@gmail.com" },
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 classifiers = [
   "Development Status :: 4 - Beta",
   "Intended Audience :: Developers",
-  "License :: OSI Approved :: MIT License",
   "Operating System :: MacOS :: MacOS X",
   "Operating System :: Microsoft :: Windows",
   "Operating System :: POSIX",
   "Programming Language :: Python :: 3 :: Only",
-  "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",
@@ -37,29 +35,15 @@ dynamic = [
 ]
 urls.Homepage = "https://github.com/pytest-dev/iniconfig"
 
-[tool.setuptools_scm]
-
-[tool.hatch.version]
-source = "vcs"
+[tool.setuptools]
+packages = [ "iniconfig" ]
+package-dir = { "" = "src" }
 
-[tool.hatch.build.hooks.vcs]
-version-file = "src/iniconfig/_version.py"
-
-[tool.hatch.build.targets.sdist]
-include = [
-  "/src",
-  "/testing",
-]
+[tool.setuptools.package-data]
+iniconfig = [ "py.typed" ]
 
-[tool.hatch.envs.test]
-dependencies = [
-  "pytest",
-]
-[tool.hatch.envs.test.scripts]
-default = "pytest {args}"
-
-[[tool.hatch.envs.test.matrix]]
-python = [ "3.8", "3.9", "3.10", "3.11", "3.12", "3.13" ]
+[tool.setuptools_scm]
+write_to = "src/iniconfig/_version.py"
 
 [tool.pytest.ini_options]
 testpaths = "testing"