setting wasm/wasi in mac and running it on wasm runtime

setting-wasm-in-mac.md

Install necessary runtime

1. Major runtimes - wasmtime / wasmcloud / wasmer - Runtime Comparison
2. Others to check - fermyon spin / wamr / wasmedge / wazero

Build a sample application using a programming language of your choice

Python example

print("Hello, world!")

• Other languages : Golang / rust (pending)

Try to componentize the app (modularization)

For python, pip install componentize-py

Steps :

1. Below is simple WIT / Interface (hello.wit) that would print some string when hello function is called

package example:hello;
world hello {
  export hello: func() -> string;
}

2. To understand the internal bindings, you can always run below; (Optional)

componentize-py -d hello.wit -w hello bindings .

3. Write the app that would print Hello, World!

import hello
class Hello(hello.Hello):
    def hello(self) -> str:
        return "Hello, World!"

3. Generate the component

componentize-py -d hello.wit -w hello componentize app -o app.wasm

Run it in wasi runtime

wasmtime run only knows how to run components targeting the wasi-cli world. It does not (as of this writing) know how to run components targeting arbitrary worlds like the hello world

Follow this

**Right now, You can create component in python and import it in another host application written in python. **

Implement the host-app in another language

Make the application as polygot by implementing a component model

Implement host application in other languages - Rust, Golang, Python

Run it again in wasi runtime [ or in the case of a browser-based application]

Integrate the wasm module into a web browser to test its functionality