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Add Ruby::Box example #647

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1 change: 1 addition & 0 deletions packages/npm-packages/ruby-wasm-wasi/example/README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -16,4 +16,5 @@ $ # Open http://localhost:8000/script-src
```console
$ npm install
$ node --experimental-wasi-unstable-preview1 index.node.js
$ node ruby-box.node.js
```
28 changes: 28 additions & 0 deletions packages/npm-packages/ruby-wasm-wasi/example/ruby-box.node.js
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@@ -0,0 +1,28 @@
import fs from "fs/promises";
import { DefaultRubyVM } from "@ruby/wasm-wasi/dist/node";

// $ node ruby-box.node.js

const main = async () => {
const binary = await fs.readFile(
"./node_modules/@ruby/head-wasm-wasi/dist/ruby.wasm",
);
const module = await WebAssembly.compile(binary);
const { vm } = await DefaultRubyVM(module, {
env: {
RUBY_BOX: "1",
},
});

vm.eval(`
box = Ruby::Box.new
box.eval <<~RUBY
X = 123
RUBY

puts "Ruby::Box.enabled?: #{Ruby::Box.enabled?}"
puts "box::X: #{box::X}"
`);
};

main();
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