Implementation status: A subset of wasi_snapshot_preview1 is implemented. The rest either throws an exception, returns an error or is incorrectly implemented.
npm install @bjorn3/browser_wasi_shim --save
import { WASI, File, OpenFile, ConsoleStdout, PreopenDirectory } from "@bjorn3/browser_wasi_shim";
let args = ["bin", "arg1", "arg2"];
let env = ["FOO=bar"];
let fds = [
new OpenFile(new File([])), // stdin
ConsoleStdout.lineBuffered(msg => console.log(`[WASI stdout] ${msg}`)),
ConsoleStdout.lineBuffered(msg => console.warn(`[WASI stderr] ${msg}`)),
new PreopenDirectory(".", [
["example.c", new File(new TextEncoder("utf-8").encode(`#include "a"`))],
["hello.rs", new File(new TextEncoder("utf-8").encode(`fn main() { println!("Hello World!"); }`))],
]),
];
let wasi = new WASI(args, env, fds);
let wasm = await WebAssembly.compileStreaming(fetch("bin.wasm"));
let inst = await WebAssembly.instantiate(wasm, {
"wasi_snapshot_preview1": wasi.wasiImport,
});
wasi.start(inst);$ npm install
$ npm run build
The demo requires the wasm rustc artifacts and the xterm js package. To get them run:
$ git submodule update --init
$ cd examples && npm install
Run the demo with a static web server from the root of this project:
$ npx http-server
And visit http://127.0.0.1:8080/examples/rustc.html in your browser.
A more complete demo by @LyonSyonII which runs miri inside the browser can be found at https://garriga.dev/rubri/. (source at https://github.com/LyonSyonII/rubri)
$ python3 -m pip install -r ./test/wasi-testsuite/test-runner/requirements.txt
$ npm test
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you shall be dual licensed as above, without any additional terms or conditions.