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Tomasz Kramkowski
ea707737bb
## Summary This is a continuation of the excellent work by @j-helland in #16452 and #17202 and closes #15767. This PR adds `preview-features` to `uv.toml` and `pyproject.toml`. This field can be set to a boolean or to a list of features. It is intended to supersede the `preview` setting itself, and conflicts with it. There's a little bit of complexity required to ensure that setting either `preview` or `preview-features` is combined at the right point, but it's also necessary to leave them split to accurately warn when a `uv.toml` masks a `pyproject.toml` in the same directory. Additionally there's complexity involved in making things work with `deny_unknown_fields` and `flatten` (they're incompatible so require manual flattening) and also this improves error messages somewhat. Also (supersedes) closes #16452 and (supersedes) closes #17202. ## Test Plan Tests taken from the original PR with some alterations and a bunch of additional tests. --------- Co-authored-by: j-helland <jonathan.w.helland@gmail.com> Co-authored-by: Zanie Blue <contact@zanie.dev>