setuptools → flit_core

Flit is a simple build system for pure Python packages, focusing on
making easy things easy. Unlike setuptools, it doesn't have to stay
compatible with projects published many years ago.

	https://flit.pypa.io/en/stable/rationale.html

While flit_scm is able to Write the version to a Python file at build time,
using setuptools_scm under the hood, it's probably best to follow the trend
and retrieve the version at run time using `importlib.metadata.version`.

Flit automatically checks metadata when building, so we don’t need  to run
`twine check` any more.

Author: DimitriPapadopoulos

.github/workflows/release.yml

@@ -25,14 +25,8 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.10"
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install build twine
       - name: Build package
         run: python -m build
-      - name: Check package
-        run: twine check --strict dist/*
       - name: Check env vars
         run: |
           echo "Triggered by: ${{ github.event_name }}"

codespell_lib/__init__.py

@@ -1,4 +1,3 @@
-from ._codespell import _script_main, main
-from ._version import __version__  # type: ignore[import-not-found]
+from ._codespell import __version__, _script_main, main
 
 __all__ = ["__version__", "_script_main", "main"]

codespell_lib/_codespell.py

@@ -26,13 +26,17 @@
 import sys
 import textwrap
 from collections.abc import Iterable, Sequence
+from importlib.metadata import version
 from re import Match, Pattern
 from typing import (
     Any,
     Optional,
     TextIO,
 )
 
+__version__ = version("codespell")
+
+
 if sys.platform == "win32":
     from ctypes import wintypes
 
@@ -42,11 +46,6 @@
 from ._spellchecker import Misspelling, build_dict
 from ._text_util import fix_case
 
-# autogenerated by setuptools_scm
-from ._version import (  # type: ignore[import-not-found]
-    __version__ as VERSION,  # noqa: N812
-)
-
 word_regex_def = r"[\w\-'’]+"  # noqa: RUF001
 # While we want to treat characters like ( or " as okay for a starting break,
 # these may occur unescaped in URIs, and so we are more restrictive on the
@@ -371,7 +370,7 @@ def parse_options(
     parser = argparse.ArgumentParser(formatter_class=NewlineHelpFormatter)
 
     parser.set_defaults(colors=_supports_ansi_colors())
-    parser.add_argument("--version", action="version", version=VERSION)
+    parser.add_argument("--version", action="version", version=__version__)
 
     parser.add_argument(
         "-d",

pyproject.toml

@@ -1,4 +1,6 @@
-# https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html
+[build-system]
+requires = ["flit_core>=3.11", "flit_scm"]
+build-backend = "flit_scm:buildapi"
 
 [project]
 name = "codespell"
@@ -63,21 +65,11 @@ codespell = "codespell_lib:_script_main"
 homepage = "https://github.com/codespell-project/codespell"
 repository = "https://github.com/codespell-project/codespell"
 
-[build-system]
-build-backend = "setuptools.build_meta"
-requires = ["setuptools>=77", "setuptools_scm[toml]>=6.2, != 8.0.0"]
-
-[tool.setuptools_scm]
-write_to = "codespell_lib/_version.py"
-
-[tool.setuptools.packages.find]
-exclude = [
-    "dist",
-    "snap",
-]
+[tool.flit.module]
+name = "codespell_lib"
 
-[tool.setuptools.package-data]
-codespell_lib = [
+[tool.flit.sdist]
+include = [
     "data/dictionary*.txt",
     "data/linux-kernel.exclude",
     "py.typed",