uv-warnings

crates/uv-warnings/ is uv's user-facing warning helper.

Purpose

tracing::warn! is for diagnostics that go to the trace log. uv-warnings is for "we want the user to see this" warnings — usually rendered with a yellow "warning:" prefix. The crate provides:

• warn_user! — the print-once-per-process variant.
• warn_user_once! — the print-once-per-message variant (deduplicates by formatted text).

These are used everywhere uv wants to nudge the user without blocking the operation (deprecated flags, suspicious project layouts, etc.).

See also

• uv-console — color decisions.