Workaround for tox w/o setup.py bug

tox.ini

@@ -18,7 +18,10 @@ requires =
     pip >= 20.2.4
 
 [testenv]
-usedevelop = True
+# both options needed to workaround https://github.com/tox-dev/tox/issues/2197
+usedevelop = False
+skip_install = True
+
 # do not put * in passenv as it may break builds do to reduced isolation
 passenv =
     CI
@@ -45,19 +48,14 @@ setenv =
     PYTHONUNBUFFERED=1
     _EXTRAS=-l --cov=molecule --no-cov-on-fail --cov-report xml:{envlogdir}/coverage.xml --html={envlogdir}/reports.html --self-contained-html
 deps =
+    --editable .[docker,lint,podman,test,windows]
     devel: git+https://github.com/ansible/ansible#egg=ansible-core
     # pytest-molecule not used but we want to check that it does not conflict
     devel: git+https://github.com/ansible-community/pytest-molecule#egg=pytest-molecule
     dockerfile: ansible>=2.10
     selinux
     py{36,37}: importlib-metadata>=0.12
     py: ansible-core
-extras =
-    docker
-    lint
-    podman
-    test
-    windows
 ; commands_pre =
 ;     find {toxinidir} -type f -not -path '{toxinidir}/.tox/*' -path '*/__pycache__/*' -name '*.py[c|o]' -delete
 ;     sh -c 'find {homedir}/.cache -type d -path "*/molecule_*" -exec rm -rfv \{\} +;'
@@ -123,8 +121,8 @@ commands =
     python -c \
     'import pathlib; '\
     'docs_dir = pathlib.Path(r"{toxinidir}") / "docs/docstree/html"; index_file = docs_dir / "index.html"; print(f"\nDocumentation available under `file://\{index_file\}`\n\nTo serve docs, use `python3 -m http.server --directory \{docs_dir\} 0`\n")'
-extras =
-    docs
+deps =
+    --editable .[docs]
 
 [testenv:docs-livereload]
 description = Invoke sphinx-autobuild to build and reload the HTML docs
@@ -134,15 +132,16 @@ usedevelop = {[testenv:docs]usedevelop}
 commands =
     python -m sphinx_autobuild docs/ "{toxworkdir}/docs/html"
 deps =
+    --editable .[docs]
     sphinx-autobuild>=0.7.1,<1.0
-extras =
-    docs
 
 [testenv:dockerfile]
 description = Tests validity of embedded Dockerfile template used by docker driver
 commands =
     ansible-playbook src/molecule/data/validate-dockerfile.yml
-extras =
+deps =
+    ansible-core
+    paramiko
     docker
     selinux