Improve tox-direct handling

- Environment variable no longer needs to be set
- All commands run with tox-direct by default
- All environment variables passed through

Author: coretl

Dockerfile

@@ -29,7 +29,6 @@ RUN pip install --upgrade pip build && \
 # set up a virtual environment and put it in PATH
 RUN python -m venv /venv
 ENV PATH=/venv/bin:$PATH
-ENV TOX_DIRECT=1
 
 # install the wheel and generate the requirements file
 RUN pip install --upgrade pip && \

setup.cfg

@@ -106,24 +106,21 @@ source =
 # NOTE that we pre-install all tools in the dev dependencies (including tox).
 # Hence the use of allowlist_externals instead of using the tox virtualenvs.
 # This ensures a match between developer time tools in the IDE and tox tools.
-# Setting TOX_DIRECT=1 in the environment will make this even faster
 [tox:tox]
 skipsdist = True
 
-[testenv:pytest]
-allowlist_externals = pytest
-commands = pytest {posargs}
-
-[testenv:mypy]
-allowlist_externals = mypy
-commands = mypy src tests {posargs}
-
-[testenv:pre-commit]
-allowlist_externals = pre-commit
-commands = pre-commit run --all-files {posargs}
-
-[testenv:docs]
-allowlist_externals =
+[testenv:{pre-commit,mypy,pytest,docs}]
+# Don't create a virtualenv for the command, requires tox-direct plugin
+direct = True
+passenv = *
+allowlist_externals = 
+    pytest 
+    pre-commit
+    mypy
     sphinx-build
     sphinx-autobuild
-commands = sphinx-{posargs:build -EW --keep-going} -T docs build/html
+commands =
+    pytest: pytest {posargs}
+    mypy: mypy src tests {posargs}
+    pre-commit: pre-commit run --all-files {posargs}
+    docs: sphinx-{posargs:build -EW --keep-going} -T docs build/html