build: Use tox to build both sdist and wheel files.

Author: seifertm

tox.ini

@@ -9,14 +9,20 @@ passenv =
 constraints = constraints.txt
 
 [testenv]
-package = wheel
-wheel_build_env = .pkg
+package = external
 extras = testing
 constraints = constraints.txt
 commands = make test
 allowlist_externals =
     make
 
+[testenv:.pkg_external]
+deps = build
+package_glob = {toxinidir}{/}dist{/}*.whl
+commands =
+    python -c 'import shutil; shutil.rmtree("{toxinidir}{/}dist", ignore_errors=True)'
+    pyproject-build --outdir {toxinidir}{/}dist .
+
 [testenv:pytest-min]
 extras = testing
 constraints = dependencies/pytest-min/constraints.txt