deps-cargo

Cargo.toml support for deps-lsp.

This crate is part of the deps-lsp workspace. It provides parsing and registry integration for the Rust/Cargo ecosystem and implements deps_core::Ecosystem.

Features

• TOML parsing — Parse Cargo.toml with byte-accurate position tracking via toml-span
• Lock file parsing — Extract resolved versions from Cargo.lock
• crates.io registry — Sparse index client for version lookups and package metadata
• Semver resolution — Resolve ^, ~, *, and range specifiers against available versions
• Workspace support — Handle workspace.dependencies inheritance and version.workspace = true

Installation

[dependencies]
deps-cargo = "0.9.3"

[!IMPORTANT] Requires Rust 1.89 or later.

Usage

use deps_cargo::{parse_cargo_toml, CratesIoRegistry};

let dependencies = parse_cargo_toml(content)?;
let registry = CratesIoRegistry::new(cache);
let versions = registry.get_versions("serde").await?;

Benchmarks

cargo bench -p deps-cargo

Parsing performance: ~4 us for small files, ~55 us for large files (100+ dependencies).

License

MIT