Add a flag to skip black formatting

[orf]

In our projects setup.cfg we often add --black via addopts, so our CI always runs with black and any other project specific options that may be required:

[tool:pytest]
addopts = -n auto --black

However there are often cases when developing locally you do not wish to have your tests fail due to black. This poses a problem, because you have to edit your setup.cfg to remove --black and remember to add it back again when committing.

It would be really handy to have a --no-black argument that can be given that overrides the --black flag, if present. So a full invocation might expand to pytest --black --no-black, which would not run black.

[C0DK]

This seems very much like an issue with your setup - not the tool. It would require the tool to make an additional flag for having the flag but not seriously meaning it.

I am not the author of this project though, so I have no real say. Just my five cent.

[orf]

This seems very much like an issue with your setup - not the tool. It would require the tool to make an additional flag for having the flag but not seriously meaning it.

This was also added to pytest-pylint for the same reasons. Using setup.cfg to enforce consistent pytest options is a very, very common (and recommended) pattern. The downside of this is it's annoying to remove some flags, which is usually only needed with plugins like pylint or black.

So yeah it would require adding an additional flag, but the only setup that's at fault here is pytest :(