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

tasks.py

@@ -2,7 +2,7 @@
 ################################################################################
 #
 #  Rattail -- Retail Software Framework
-#  Copyright © 2010-2020 Lance Edgar
+#  Copyright © 2010-2024 Lance Edgar
 #
 #  This file is part of Rattail.
 #
@@ -25,20 +25,32 @@ Tasks for rattail-corepos
 """
 
 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_corepos', '_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
-def release(ctx):
+def release(c):
     """
     Release a new version of 'rattail-corepos'.
     """
-    shutil.rmtree('rattail_corepos.egg-info')
-    ctx.run('python setup.py sdist --formats=gztar')
-    ctx.run('twine upload dist/rattail_corepos-{}.tar.gz'.format(__version__))
+    if os.path.exists('rattail_corepos.egg-info'):
+        shutil.rmtree('rattail_corepos.egg-info')
+    c.run('python -m build --sdist')
+    c.run(f'twine upload dist/rattail_corepos-{__version__}.tar.gz')