Awesome

<div align="center"> <h1><code>cargo wasi</code></h1>

<strong>A <a href="https://bytecodealliance.org/">Bytecode Alliance</a> project</strong>

<p> <strong>A lightweight Cargo subcommand to build code for the <code>wasm32-wasi</code> target.</strong> </p> <p> <a href="https://crates.io/crates/cargo-wasi"><img src="https://img.shields.io/crates/v/cargo-wasi.svg?style=flat-square" alt="Crates.io version" /></a> <a href="https://crates.io/crates/cargo-wasi"><img src="https://img.shields.io/crates/d/cargo-wasi.svg?style=flat-square" alt="Download" /></a> <a href="https://bytecodealliance.github.io/cargo-wasi/"><img src="https://img.shields.io/badge/docs-latest-blue.svg?style=flat-square" alt="docs.rs docs" /></a> </p> <h3> <a href="https://bytecodealliance.github.io/cargo-wasi/">Guide</a> <span> | </span> <a href="https://bytecodealliance.github.io/cargo-wasi/contributing.html">Contributing</a> </h3> </div>

Installation

To install this Cargo subcommand, first you'll want to install Rust and then you'll execute:

$ cargo install cargo-wasi

After that you can verify it works via:

$ cargo wasi --version

Usage

The cargo wasi subcommand is a thin wrapper around cargo subcommands, providing optimized defaults for the wasm32-wasi target. Using cargo wasi looks very similar to using cargo:

cargo wasi build — build your code in debug mode for the wasi target.
cargo wasi build --release — build the optimized version of your *.wasm.
cargo wasi run — execute a binary.
cargo wasi test — run your tests in wasm32-wasi.
cargo wasi bench — run your benchmarks in wasm32-wasi.

In general, if you'd otherwise execute cargo foo --flag you can likely execute cargo wasi foo --flag and everything will "just work" for the wasm32-wasi target.

To give it a spin yourself, try out the hello-world versions of programs!

$ cargo new wasi-hello-world
     Created binary (application) `wasi-hello-world` package
$ cd wasi-hello-world
$ cargo wasi run
   Compiling wasi-hello-world v0.1.0 (/code/wasi-hello-world)
    Finished dev [unoptimized + debuginfo] target(s) in 0.15s
     Running `cargo-wasi target/wasm32-wasi/debug/wasi-hello-world.wasm`
     Running `target/wasm32-wasi/debug/wasi-hello-world.wasm`
Hello, world!

Or a library with some tests:

$ cargo new wasi-hello-world --lib
     Created library `wasi-hello-world` package
$ cd wasi-hello-world
$ cargo wasi test
   Compiling wasi-hello-world v0.1.0 (/code/wasi-hello-world)
    Finished dev [unoptimized + debuginfo] target(s) in 0.19s
     Running target/wasm32-wasi/debug/deps/wasi_hello_world-9aa88657c21196a1.wasm
     Running `/code/wasi-hello-world/target/wasm32-wasi/debug/deps/wasi_hello_world-9aa88657c21196a1.wasm`

running 1 test
test tests::it_works ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out

License

This project is license under the Apache 2.0 license with the LLVM exception. See [LICENSE] for more details.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this project by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.

See the contributing section of the guide to start hacking on cargo wasi!