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Split preview mode into separate feature flags (#14823)

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I think this would give us better hygiene than a global flag. It makes
it easier for users to opt-in to overlapping features, such as Python
upgrades and Python bin installations and to disable warnings for
preview mode without opting in to a bunch of other features. In general,
I want to reduce the burden for putting something under preview.

The `--preview` and `--no-preview` flags are retained as global
overrides. A new `--preview-features` option is added which accepts
comma separated features or can be passed multiple times, e.g.,
`--preview-features add-bounds,pylock`. There's a `UV_PREVIEW_FEATURES`
environment variable for that option (I'm not sure if we should overload
`UV_PREVIEW`, but could be convinced).
This commit is contained in:
Zanie Blue 2025-07-25 11:01:57 -05:00 • committed by GitHub
parent 9376cf5482
commit bfb4bc2aeb
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4
crates/uv-virtualenv/src/lib.rs
View file

@ -3,7 +3,7 @@ use std::path::Path;
use thiserror::Error;
use uv_configuration::PreviewMode;
use uv_configuration::Preview;
use uv_python::{Interpreter, PythonEnvironment};
pub use virtualenv::{OnExisting, remove_virtualenv};
@ -56,7 +56,7 @@ pub fn create_venv(
relocatable: bool,
seed: bool,
upgradeable: bool,
preview: PreviewMode,
preview: Preview,
) -> Result<PythonEnvironment, Error> {
// Create the virtualenv at the given location.
let virtualenv = virtualenv::create(

4
crates/uv-virtualenv/src/virtualenv.rs
View file

@ -12,7 +12,7 @@ use itertools::Itertools;
use owo_colors::OwoColorize;
use tracing::{debug, trace};
use uv_configuration::PreviewMode;
use uv_configuration::Preview;
use uv_fs::{CWD, Simplified, cachedir};
use uv_pypi_types::Scheme;
use uv_python::managed::{PythonMinorVersionLink, create_link_to_executable};
@ -59,7 +59,7 @@ pub(crate) fn create(
relocatable: bool,
seed: bool,
upgradeable: bool,
preview: PreviewMode,
preview: Preview,
) -> Result<VirtualEnvironment, Error> {
// Determine the base Python executable; that is, the Python executable that should be
// considered the "base" for the virtual environment.