Ignore non-test directories

[gjoseph92]

Supersedes #5719. This does make pyetst work on the root distributed directory.

cc @ian-r-rose @jrbourbeau

• Tests added / passed
• Passes pre-commit run --all-files

[ian-r-rose]

I like this solution over doing things like skip or changing names. distributed doesn't currently have a pyproject.toml, but it could. Going forward, putting configuration for tooling there would help prevent a proliferation of different one-off config files.

[gjoseph92]

Good point about pyproject.toml. I have taken the initiative to add one! Hopefully this will lower the barrier to adding other stuff in there too.

[jrbourbeau]

Today we use setup.cfg for this type of configuration. I don't know much about pyproject.toml, there may be good reasons for preferring it over setup.cfg, but I'd prefer not to split configuration between both pyproject.toml and setup.cfg files. For the time being could you update

distributed/setup.cfg

Lines 41 to 42 in dbc5b0f

	[tool:pytest]
	addopts = -v -rsxfE --durations=20 --color=yes

instead?

[jrbourbeau]

We're not testing code snippets in the docs today, but wanted to flag that --ignore=docs may need to be removed if we want to start that level of testing

[gjoseph92]

Usage of setup.cfg is not recommended unless for very simple use cases. .cfg files use a different parser than pytest.ini and tox.ini which might cause hard to track down problems. When possible, it is recommended to use the latter files, or pyproject.toml, to hold your pytest configuration.

https://docs.pytest.org/en/6.2.x/customize.html#setup-cfg

[jrbourbeau]

That's good to know. Does adding these ignores to our existing setup.cfg work in this case? I'd still prefer to not have some pytest configuration in setup.cfg and some in pyproject.toml. I think this PR should move over all the settings to pyproject.toml or keep them in setup.cfg for the time being (if they work)

[jrbourbeau]

Thanks @gjoseph92! This should be good to merge once CI finishes up

Also, I opened #5725 to follow up on moving to pyproject.toml