Augment Golo in Golo

1. Create a new Golo module

In /stdlib, create a new file named (for example) k33g.golo with the following content:

module gololang.K33g

function HelloWorld = -> "👋 Hello World 🌍"

function Greet = |name| -> "👋 Hello, " + name + "! 😁"

function ShoutGreet = |name| -> 
  "📣 " + 
  Greet(name): toUpperCase() + 
  "!!!"

The name of the module must start with gololang. to be recognized as a standard library module.

2. Update stdlib/stdlib.go

In the stdlib/stdlib.go file,

first, define a new variable for your module:

//go:embed k33g.golo
var k33gSource string

With go:embed, you can embed the content of your Golo file (k33g.golo) directly into the Go binary.

Then, add your module to the EmbeddedModules map:

var EmbeddedModules = map[string]string{
	"gololang.Errors":    errorsSource,
	"gololang.K33g":      k33gSource,
	"gololang.AnsiCodes": ansicodesSource,
	"gololang.Testing":   testingSource,
}

3. Rebuild the Golo binary

go build

4. Use your new module in Golo

main.golo:

module demo.main

import gololang.K33g

function main = |args| {
  println(HelloWorld())
  println(Greet("K33g"))
  println(ShoutGreet("K33g"))
}

Then, run:

golo main.golo

The output should be:

👋 Hello World 🌍
👋 Hello, K33g! 😁
📣 👋 HELLO, K33G! 😁!!!