uv-metadata

crates/uv-metadata/ reads core-metadata files from wheels and sdists.

Purpose

A wheel's dist-info/METADATA and an sdist's PKG-INFO are both Core Metadata files. uv needs to read them in many places — at install time, during publish, when populating cache entries, when answering uv pip show. This crate is the parser.

Key abstractions

• read_metadata_async_seek — async, seeking reader for metadata embedded in a .whl.
• Helpers for reading PKG-INFO from sdists.

See also

• uv-pypi-types for the Metadata23 model.
• uv-publish for one of the heaviest consumers.