uv-normalize

crates/uv-normalize/ defines PackageName, ExtraName, GroupName, DefaultGroups, and the normalization functions that PEP 503 and PEP 685 require.

Purpose

Package and extra names need to be normalized (Foo_Bar → foo-bar) before comparison. Doing this in one crate guarantees that every == everywhere agrees on equality.

Key abstractions

• PackageName — a normalized package name (smart pointer over Box<str>).
• ExtraName — a normalized extra name.
• GroupName — a dependency-group name.
• InvalidNameError — produced when the input violates PEP 503 / PEP 685.
• DefaultGroups — the typed [tool.uv.default-groups] value.

The types hash and compare by their normalized form but Display preserves the input casing when we want to echo it back to the user.

See also

• uv-pep508, uv-pep440 — neighbors in the parsing stack.