feat: switch from setup.cfg to pyproject.toml + hatchling

.gitignore

@@ -1,2 +1,4 @@
+*~
 *.pyc
+dist/
 rattail_fabric2.egg-info/

pyproject.toml

@@ -0,0 +1,42 @@
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+
+[project]
+name = "rattail-fabric2"
+version = "0.3.6"
+description = "Fabric (v2) Utilities for Rattail"
+readme = "README.rst"
+authors = [{name = "Lance Edgar", email = "lance@edbob.org"}]
+license = {text = "GNU GPL v3+"}
+classifiers = [
+        "Development Status :: 3 - Alpha",
+        "Environment :: Console",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python :: 3",
+        "Topic :: System :: Systems Administration",
+        "Topic :: Software Development :: Libraries :: Python Modules",
+]
+dependencies = [
+        "fabric2",
+        "invoke",
+        "rattail",
+        "six",
+]
+
+
+[project.urls]
+Homepage = "https://rattailproject.org"
+Repository = "https://kallithea.rattailproject.org/rattail-project/rattail-fabric2"
+Changelog = "https://kallithea.rattailproject.org/rattail-project/rattail-fabric2/files/master/CHANGES.rst"
+
+
+[tool.commitizen]
+version_provider = "pep621"
+tag_format = "v$version"
+update_changelog_on_bump = true

rattail_fabric2/_version.py

@@ -1,3 +1,9 @@
 # -*- coding: utf-8; -*-
 
-__version__ = '0.3.6'
+try:
+    from importlib.metadata import version
+except ImportError:
+    from importlib_metadata import version
+
+
+__version__ = version('rattail-fabric2')

setup.cfg

@@ -1,33 +0,0 @@
-# -*- coding: utf-8; -*-
-
-[metadata]
-name = rattail-fabric2
-version = attr: rattail_fabric2.__version__
-author = Lance Edgar
-author_email = lance@edbob.org
-url = https://rattailproject.org/
-license = GNU GPL v3
-description = Fabric (v2) Utilities for Rattail
-long_description = file: README.rst
-classifiers =
-        Development Status :: 3 - Alpha
-        Environment :: Console
-        Intended Audience :: Developers
-        License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
-        Natural Language :: English
-        Operating System :: OS Independent
-        Programming Language :: Python :: 3
-        Topic :: System :: Systems Administration
-        Topic :: Software Development :: Libraries :: Python Modules
-
-
-[options]
-install_requires =
-        fabric2
-        invoke
-        rattail
-        six
-
-packages = find:
-include_package_data = True
-zip_safe = False

setup.py

@@ -1,26 +0,0 @@
-# -*- coding: utf-8; -*-
-################################################################################
-#
-#  Rattail -- Retail Software Framework
-#  Copyright © 2010-2023 Lance Edgar
-#
-#  This file is part of Rattail.
-#
-#  Rattail is free software: you can redistribute it and/or modify it under the
-#  terms of the GNU General Public License as published by the Free Software
-#  Foundation, either version 3 of the License, or (at your option) any later
-#  version.
-#
-#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
-#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
-#  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
-#  details.
-#
-#  You should have received a copy of the GNU General Public License along with
-#  Rattail.  If not, see <http://www.gnu.org/licenses/>.
-#
-################################################################################
-
-from setuptools import setup
-
-setup()

tasks.py

@@ -25,13 +25,24 @@ Tasks for rattail-fabric2
 """
 
 import os
+import re
 import shutil
 
 from invoke import task
 
 
 here = os.path.abspath(os.path.dirname(__file__))
-exec(open(os.path.join(here, 'rattail_fabric2', '_version.py')).read())
+__version__ = None
+pattern = re.compile(r'^version = "(\d+\.\d+\.\d+)"$')
+with open(os.path.join(here, 'pyproject.toml'), 'rt') as f:
+    for line in f:
+        line = line.rstrip('\n')
+        match = pattern.match(line)
+        if match:
+            __version__ = match.group(1)
+            break
+if not __version__:
+    raise RuntimeError("could not parse version!")
 
 
 @task
@@ -39,9 +50,10 @@ def release(c):
     """
     Release a new version of 'rattail-fabric2'.
     """
+    if os.path.exists('rattail_fabric2.egg-info'):
         shutil.rmtree('rattail_fabric2.egg-info')
     # TODO: this seems heavy-handed? for sake of recursive-include in MANIFEST
     # TODO: what i esp. don't like is, this doesn't consider .gitignore
     c.run("find . -name '*~' -delete")
-    c.run('python setup.py sdist --formats=gztar')
+    c.run('python -m build --sdist')
     c.run(f'twine upload dist/rattail_fabric2-{__version__}.tar.gz')