I think the goal is to make uv a complete package manager for Python while still giving you the option to use the parts separately.
uv is like cargo for python.
If you only need a fast type checker you can just use ty, if you just need a fast formatter and linter you can just use ruff.
Combining ruff and ty doesn't make sense if you think about like this.
One of the maintainers said in another comment that it will download the formatter (ruff) and it is not embedded. So if you don't use that feature you won't even notice: https://news.ycombinator.com/item?id=44978660
I’m sure you’re a old man on the verge of death who loves yelling at clouds but enforcement and application of consistent code formatting has been considered a basic part of project management for a while now. Recent langage provide it as part of core project management tooling.
Given uv is openly strongly inspired by cargo and astral also has tooling for code formatting, the integration was never a question of “if”.
I remember how in a previous job the code formatter cost me time and time again. I already intentionally format my code as it makes sense and with the goal of improving readability. Then the damn auto formatter comes along and destroys this, by splitting a log call over 5 lines, because it has seen, that the log call is longer than 80 characters. Thank you for wasting 5 LoC of screen space for something that is a sidenote basically. That'll surely improve readability. So what do people do? They increase line length to 200 characters, to avoid this shit happening. Only that now it does no longer break long lines that should be broken. Unless I added trailing comma everywhere, wasting more time to make the formatter behave properly.
I am not against auto formatters in general, but they need to be flexible and semantically aware. A log call is not the same as other calls in significance. If the auto formatter is too silly to do that, then I prefer no auto formatter at all and keep my code well formatted myself, which I do anyway while I am writing the code. I do it for my own sake and for anyone who comes along later. My formatting is already pretty much standard.
Doing a lot of Rust, there is one huge benefit of having cargo handle rustfmt: it knows the fileset you're talking about. It will not blindly format all rust files in the cwd, rather the "current" crate (current having the same definition as cargo!).
Translating this to uv, this will streamline having multiple python packages in the same directory/git repo, and leave e.g. vendored dependencies alone.
Also, since their goal really is "making cargo for python", it will likely support package-scoped ruff config files, instead of begin file- or directory-based.
It’s not a package manager. It’s a project manager.
i think it's good to let them experiment! cargo (and go?) offers this already, so why not.
Including a formatter in a package manager doesn't make sense to me. Seems like obvious feature creep.
My understanding was that uv is for installing dependencies (e.g. like pip) with the added benefit of also installing/managing python interpreters (which can be reasonably thought of as a dependency). This makes sense. Adding more stuff doesn't make sense.