Upgrade packaging testing (#71)

Author: ssbarnea

tox.ini

@@ -1,10 +1,15 @@
 [tox]
-# toxworkdir = /data1/DATA/tox/ruyaml
+minversion = 3.16.1
 envlist =
     linters
     docs
     packaging
     py{36,37,38,39,310}
+isolated_build = true
+requires =
+  setuptools >= 41.4.0
+  pip >= 19.3.0
+skip_missing_interpreters = False
 
 [testenv]
 description = Unittest using {basepython}
@@ -13,6 +18,9 @@ commands =
     /bin/bash -c 'pytest _test/test_*.py'
 deps =
     pytest
+allowlist_externals =
+    make
+    sh
 
 [testenv:docs]
 description = Build docs
@@ -22,8 +30,6 @@ extras =
 commands =
     make singlehtml
 changedir = {toxinidir}/_doc
-whitelist_externals =
-    make
 
 [testenv:linters]
 description = Linting
@@ -37,29 +43,29 @@ commands =
 
 [testenv:packaging]
 description =
-    Do packaging/distribution. If tag is not present or PEP440 compliant upload to
-    PYPI could fail
+    Do packaging/distribution
 # `usedevelop = true` overrides `skip_install` instruction, it's unwanted
 usedevelop = false
 # don't install package itself in this env
 skip_install = true
 deps =
-    collective.checkdocs==0.2
-    pep517 >= 0.5.0
-    twine==1.14.0  # pyup: ignore
+  build >= 0.7.0
+  twine >= 3.7.0
 setenv =
 commands =
-    rm -rfv {toxinidir}/dist/
-    python -m pep517.build \
-      --source \
-      --binary \
-      --out-dir {toxinidir}/dist/ \
-      {toxinidir}
-    # metadata validation
-    sh -c "python -m twine check {toxinidir}/dist/*"
-whitelist_externals =
-    rm
-    sh
+    # build wheel and sdist using PEP-517
+    {envpython} -c 'import os.path, shutil, sys; \
+    dist_dir = os.path.join("{toxinidir}", "dist"); \
+    os.path.isdir(dist_dir) or sys.exit(0); \
+    print("Removing \{!s\} contents...".format(dist_dir), file=sys.stderr); \
+    shutil.rmtree(dist_dir)'
+    {envpython} -m build \
+        --outdir {toxinidir}/dist/ \
+        {toxinidir}
+    # Validate metadata using twine
+    twine check --strict {toxinidir}/dist/*
+    # Install the wheel
+    sh -c "python3 -m pip install --force-reinstall {toxinidir}/dist/*.whl"
 
 [pytest]
 filterwarnings =