cargo-component を Homebrew, Nix でインストール

プロジェクトリンク

• ホームページ
• 上流ドキュメント
• パッケージマネージャページ

コマンドとエイリアス

• cargo-component

プロジェクトの歴史

The repository was created in 2022 under the Bytecode Alliance. Its README describes cargo-component as an experimental attempt to imagine what first-class Rust support for WebAssembly components might look like before Cargo itself has native component-model support.

The project grew alongside Bytecode Alliance work on the WebAssembly component model, wit-bindgen, Wasmtime, and WASI Preview 2. It uses Cargo.toml metadata and generates Rust bindings so component interfaces can be used in a Cargo-like development loop.

採用の歴史

Adoption has followed the WebAssembly component-model community rather than general Rust CLI usage. crates.io metadata shows hundreds of thousands of downloads by June 2026, and Homebrew and Nix packaging make it easier to install for component-model experiments and CI builds.

The README notes that Rust's upstream wasm32-wasip2 target now produces components for some WASI use cases, leaving cargo-component most relevant where projects need non-WASI WIT interfaces, component dependencies, or features not yet covered by plain Cargo.

使われ方

The documented flow starts with `cargo component new --lib <name>` or a command component, creates a `wit/world.wit` interface, implements generated bindings in Rust, and builds with `cargo component build`.

The tool can also add and update component interface dependencies through Cargo.toml, and it supports adapter configuration in `[package.metadata.component]` for WASI Preview 1 to Preview 2 adaptation.

パッケージ好きにとっての重要性

cargo-component is significant because it treats WebAssembly components as packageable dependencies inside Cargo projects. For package ecosystem watchers, it is a live example of how Rust's package manager might evolve when language packages and portable component interfaces meet.

It also marks a transitional period: component-model tooling is moving quickly, and the README explicitly frames cargo-component as useful until more support lands in the Rust compiler and Cargo.

タイムライン

• 2021: crates.io records an initial cargo-component publication.
• 2022: GitHub repository created under bytecodealliance/cargo-component.
• 2024: README references Rust 1.82 adding the upstream wasm32-wasip2 target.
• 2025: GitHub releases show the 0.21.x series.

Related projects

• The WebAssembly component model defines the component format cargo-component targets.
• wit-bindgen generates bindings for WIT interfaces and is closely related to cargo-component's generated Rust bindings.
• Wasmtime supplies WASI adapter work referenced by the README.
• Rust's wasm32-wasip2 target is an upstream alternative for some WASI-only component builds.

ソース

• https://api.github.com/repos/bytecodealliance/cargo-component
• https://crates.io/api/v1/crates/cargo-component
• https://github.com/bytecodealliance/cargo-component#readme