Add a strict version of fromEnvironment import strategy

[jder]

Is it possible to add a strict version of "fromEnvironment" which does not fall back to the built-in version of ruff if the one from the environment is not found?

I was in a situation today where hitting save (with format-on-save turned on) misformatted my code because I was in the middle of erasing my virtualenv and rebuilding it, and ruff helpfully fell back to the bundled version (which had different behavior than the one from the environment). I would much prefer it fails to format the code and I can re-run the formatting once my venv is back into a reasonable place.

Thanks!

[MichaReiser]

Thanks. This does sound very unfortunate. I'm open to adding a third option