Exclude development environments from package

tools/check_wheel.py

@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+"""Reject development artifacts accidentally bundled in a wheel."""
+
+from pathlib import Path
+from zipfile import ZipFile
+
+
+wheel = next(Path('dist').glob('*.whl'))
+forbidden = {'.ci-venv', '.test-venv', '.venv', '__pycache__'}
+with ZipFile(wheel) as archive:
+    invalid = [
+        name for name in archive.namelist()
+        if forbidden.intersection(Path(name).parts)
+        or name.endswith(('.pyc', '.pyo'))
+        ]
+if invalid:
+    raise SystemExit(f'Forbidden wheel content: {invalid[:10]}')
+print(f'Validated clean wheel: {wheel}')