Import

With the import keyword, it’s possible to import a script from another file or another mod. This allows you to organize and structure your code in different folders and files.

MathHelper.luna

static class MathHelper {
    static function Add(a, b) {
        return a + b
    }
}

Main.luna

import MathHelper

print(MathHelper.Add(5, 10)) // 15

Alias: as

It’s strongly recommended to always use an as alias when importing scripts because it avoids naming collisions between imports.

MathHelper.luna

static class MathHelper {
    static function Add(a, b) {
        return a + b
    }
}

AnotherHelper.luna

static class MathHelper {
    static function Remove(a, b) {
        return a - b
    }
}

Main.luna

import MathHelper
import AnotherHelper

MathHelper.Add(5, 10) // Error, as MathHelper is defined twice

The correct way of doing it: Main.luna

import MathHelper as Helper
import AnotherHelper as ExtraHelper

Helper.MathHelper.Add(5, 10) // Uses the Helper.luna its MathHelper
ExtraHelper.MathHelper.Remove(5, 10) // Uses the AnotherHelper.luna its MathHelper

Folders

If the script you want to import is part of another folder, you will need to include the folder name based on from root folder of your mod. Helpers/MathHelper.luna

static class MathHelper {
    static function Add(a, b) {
        return a + b
    }
}

Core/Calculations.luna

import Helpers/MathHelper

print(MathHelper.Add(5, 10)) // 15

Importing Scripts from other mods

A script from another mod can also be imported. This allows mods to act as modules where their code can be reused within many other mods. This is done with the following syntax MODNAME::SCRIPT

• MODNAME is the name of the mod
• SCRIPT is the name of the script that should be imported

Let’s say there’s a mod called NumberColors which has this script NumberColor.luna

static class NumberColor {
    private static Negative = new Color("ff8b00");
    private static Positive = new Color("ff556b");
    private static Neutral = new Color("eeeeee");

    static function GetAbsoluteColor(input: number): Color {
        if (input == 0) return Neutral;
        if (input > 0) return Positive;
        return Negative;
    }
}

First you’d need to add the NumberColors mod as a dependency as described [here]. Now that the NumberColors mod is a dependency, we can use it in our own code

import NumberColors::NumberColor as NumberColor

print(NumberColor.GetAbsoluteColor(5)) // ffff6b