Incorrect suggestion when creating a new project with --backend instead of --build-backend

[styvane]

uv suggests the wrong argument when creating a new project with a wrong --backend argument

uv init  --lib --backend maturin no-name

It returns the following error message:

error: unexpected argument '--backend' found

  tip: a similar argument exists: '--package'

Usage: uv init <PATH|--name <NAME>|--virtual|--package|--no-package|--app|--lib|--script|--vcs <VCS>|--build-backend <BUILD_BACKEND>|--no-readme|--author-from <AUTHOR_FROM>|--no-pin-python|--no-workspace|--python <PYTHON>>

For more information, try '--help'.

I was expecting the suggestion to be a similar argument exists: --build-backend

Version:

uv --version
uv 0.4.25 (97eb6ab4a 2024-10-21)

[charliermarsh]

That's an odd one though I don't think we control these suggestions.

[zanieb]

Yeah these are implemented in Clap, not sure what we can do here.

[zanieb]

I guess we can declare a hidden --backend argument with UnknownArgumentValueParser and suggest the proper one. There are some minor caveats, as discussed in clap-rs/clap#5781 (though that mostly focused on subcommands).

[styvane]

I can try to implement this if that is ok

[zanieb]

@styvane sure!