Ruff fails when attempting to produce an output file within a non-existent directory

[celestialorb]

I wasn't able to find a previously submitted issue surrounding this, apologies if I missed it.

Ruff fails (exit code 2) when trying to write to an output file (via --output-file) within a directory that doesn't exist with the following message:

ruff failed
  Cause: No such file or directory (os error 2)

I'd like to see Ruff automatically create the necessary directories to house the output file if they don't already exist rather than have to ensure the directory exists before invoking Ruff; or have Ruff have an option to automatically create the directories.

Reproducing the issue is fairly simple. Setting the --output-file flag to a filesystem location whose directories don't exist should do the trick (e.g. ruff check --isolated --output-file /tmp/does/not/exist/output.txt). This was tested on the latest Ruff (0.4.5). Creating the necessary directories (i.e. mkdir -p /tmp/does/not/exist) and then rerunning the command allows Ruff to succeed.

[charliermarsh]

Thanks, will fix this real quick.