`uv pip tree` should display extras

Description

Contributor guide

Tech stack

rustpython

Domain

clitooling

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

fresh

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

basic Rust knowledgeunderstanding of pip tree commandfamiliarity with uv's codebase structure

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

40

Research direction

Investigate the current implementation of `uv pip tree` in the CLI commands. Look for how packages and their metadata (including extras) are stored and accessed. The issue expects the output to include extras for each package. Consider examining the tree display logic in the relevant module, possibly in `crates/uv cli/src/commands/pip tree.rs` or similar. Review how extras are tracked during installation to determine if they are available in the dependency graph. A possible approach is to extend the existing tree formatting function to append extra information when present.