[7431] Add --suppress-logger CLI option

[itxasos23]

Issue

Users want to suppress logger by name when invoking pytest.

Proposed solution

• Added new CLI option to suppress loggers by name.
• A null filter is added to each logger, which returns False for every log entry.

Based off https://github.com/pytest-dev/pytest/pull/7873/files from @symonk
Closes #7431

[ankostis]

Thank you, indeed your test-cases cover the functionality.

[ankostis]

Cannot merge this very useful PR, not closely involved with this project to take responsibility
@nicoddemus @bluetech, @asottile ?

[nicoddemus]

Thanks @itxasos23!

Besides the comments, we also should add this new option to https://github.com/pytest-dev/pytest/blob/main/doc/en/how-to/logging.rst.

[itxasos23]

Besides the comments, we also should add this new option to https://github.com/pytest-dev/pytest/blob/main/doc/en/how-to/logging.rst. - @nicoddemus

Added docs entry; I'd like a review on wording and clarity, if possible 🙏

[nicoddemus]

Thanks @itxasos23!

[nicoddemus]

Added docs entry; I'd like a review on wording and clarity, if possible

Looks good, thanks!

[twmr]

Why is the new option just a command line option and not an ini option? I guess that it can't be specified in e.g. pytest.ini, right?

[nicoddemus]

It is possible to use addopts to set that for every invocation if one chooses, is that what you are asking?

[twmr]

Yes, kind of. In the logging plugin we have the add_option_ini function which is used for most parameters of the logging plugin. I think that whenever we don't use this function, we should explain in a comment why we don't use it. Even better would be an explanation in the docstring of pytest_addoption in logging.py that explains if new options should be added as ini options, as cli options or as both.

[nicoddemus]

There's still time to change this, as 7.2.0 was not released yet. 😁