Wasm Shell (wash) CLI

Wasm Shell (wash) is the comprehensive command-line tool for developing, building, and publishing WebAssembly components.

The CLI provides an intuitive developer experience for the modern Wasm ecosystem, from project scaffolding to building and pushing components to OCI registries.

The Wasm Shell CLI is available on GitHub as part of the open source wasmCloud project, hosted by the Cloud Native Computing Foundation (CNCF).

See the Installation page to install wash.

What does wash do?

note

This quick command tour requires the Rust toolchain and the wasm32-wasip2 target for Rust: rustup target add wasm32-wasip2

Create a new component and navigate to the project directory:

shell

wash new https://github.com/wasmCloud/wasmCloud.git --subfolder examples/http-hello-world --name hello

shell

cd hello

Build a component project into a WebAssembly binary:

shell

wash build

Start a component development loop:

shell

wash dev

Update wash:

shell

wash update

Next steps

• Explore the wash CLI's Command Reference.
• Read the Developer Guide to create a WebAssembly component.