Ruff rule does not describe multiple rules

[rotu]

version = 0.0.272

Flake8 supports providing a partial error code like "E4" to select all error codes starting with "E4" (i.e. E401 and E402)

ruff . --select E4 runs both E401 and E402.
But ruff rule E4 describes E401 and does not even mention that "E4" also entails E402.

[rotu]

Behavior has changed since #2812 was reported. Not sure if current behavior is intentional.

[charliermarsh]

My initial preference would be to error on ruff rule E4, rather than show multiple rules, since we don't really have a good format for that. At the very least, it's wrong to show the E402 docs in that case!

[rotu]

@charliermarsh erroring would be good. Even better would be showing the list of rules it expands to (just the ID and short name is plenty useful!)

[dhruvmanila]

The behavior got changed in 0.0.247, earlier we were throwing an error:

❯ pipx run "ruff==0.0.246" rule E4                               
⚠️  ruff is already on your PATH and installed at /Users/dhruv/.local/bin/ruff. Downloading and running anyway.
error: invalid value 'E4' for '<RULE>': unknown rule code

For more information, try '--help'.

I think it might be related to the many-to-one changes: git log --grep='^many-to-one' --oneline

[charliermarsh]

@dhruvmanila - Are you taking a look at the lack of an error?

[dhruvmanila]

You can look at it if you want, I just thought to perform a quick bisection search to find out when did the behavior changed.

[charliermarsh]

I'll take a quick look.