Golang to WASI #PART1

Go, also known as Golang, is an open-source, compiled, and statically typed programming language designed by Google. It is built to be simple, high-performing, readable, and efficient. lets try to compile Go to WASI

Prerequisites

• Install Golang,go to go.dev and follow the instructions.

• Install tinygo, go to tinygo.org and follow the instructions.
  NB: please note: tinygo requires go version 1.15 through 1.17

• Install wasmtime,you will find wasmtime at wasmtime.dev

First example, we would create a simple Go program that checks in an integer input is odd or even.
Create a folder with a name of your choice, i would be using "Golang-to-WASI" as the name of my folder.

cd Golang-to-WASI

create a file main.go, add following code into your main.go file and save the file.

// Simple Program to Check Entered Number is Even or Odd

package main

import "fmt"

func main(){
    fmt.Print("Enter number : ")
    var n int
    fmt.Scanln(&n)

    if(n%2==0){
        fmt.Println(n,"is an Even number")
    }else{
        fmt.Println(n,"is Odd number")
    }
}

Run your code and provide input to see the result

go run main.go

We will can compile to WASM using the following command:

tinygo build -wasm-abi=generic -target=wasi -o main.wasm main.go

Now let us run the WebAssembly generated using wasmtime

wasmtime main.wasm

See full code at github
In part 2, we will look at file systems with Golang and wasi, cheers!