is --line-length argument working?

[Bartolomé Sintes]

I am using VSCode 1.85 with Ruff extension updated (0.1.5).
I am trying to set the limit-length argument, but the E501 is not showing.
I think some screenshots will be useful in order to explain the issue:
My program is just two lines: one with an f-string without placeholders (line 2) and another one with a long line (line 3, 135 characters long). The F541 warning is shown as expected:

If I ignore the F541 warning in settings.json, the warning is not shown anymore:

So ruff seems to be working as expected, but the E501 is not shown.
I understand that line length must be set in ruff.lint.args, as explained in astral-sh/ruff#8363
Am I doing something wrong or is it a ruff extension bug?
Thanking you in advance,
Bartolomé Sintes

[Charlie Marsh]

Sorry for the confusion -- we no longer include E501 in the default rule set, so you need to add --select=E501 or --select=E to your ruff.lint.args.

[Charlie Marsh]

You can see the default configuration at the top here: https://docs.astral.sh/ruff/configuration/

[Bartolomé Sintes]

Thank you for your fast answer. You are completely right.
When I read the pull 8363, "Add --line-length option to format command" I did not realize it was a pull in the ruff repository, not in the ruff-vscode one. I supposed that line-length should be added to the ruff.format.args section, not to the ruff.lint.args as it should. My mistake, sorry.
Keep your very good work!

[Jernej Makovsek]

What's even more confusing to me is running ruff check --line-length 10 my.py doesn't return any errors.

[Charlie Marsh]

@jmakov -- Per the above, you need to enable the line-length rule -- it's not included by default, since it often conflicts with using a formatter. Can you try adding --extend-select=E to your command and configuration?

[Jernej Makovsek]

@jmakov -- Per the above, you need to enable the line-length rule -- it's not included by default, since it often conflicts with using a formatter. Can you try adding --extend-select=E to your command and configuration?

Thank you for the quick response. Yes, that works. Would expect a flag to overwrite everything when the user uses it. Anyhow, my probl is solved, thanks.