Call Lua From Rust

Cargo.toml

[package]
name = "call-lua-from-rust"
version = "0.1.0"
edition = "2024"

[dependencies]
mlua = { version = "0.11", features = ["lua54", "vendored"] }

config.lua

LUA_VARIABLE = "Hello from Lua!"

--- @param name string
--- @return string
function LUA_FUNCTION(name)
	return "Hello, " .. name .. "!"
end

main.rs

// https://github.com/mlua-rs/mlua
// https://github.com/mlua-rs/mlua/blob/main/examples/guided_tour.rs

use mlua::prelude::*;
use mlua::{Function};
use std::path::Path;

fn main() -> LuaResult<()> {
    let lua = Lua::new();

    let file_path = Path::new("src/config.lua");
    lua.load(file_path).exec()?;

    let globals = lua.globals();

    let script_variable: String = globals.get("LUA_VARIABLE")?;
    println!("Value from Lua script: {}", script_variable);

    let script_function: Function = globals.get("LUA_FUNCTION")?;
    let returned = script_function.call::<String>("from Rust")?;
    println!("Returned from Lua function: {}", returned);

    Ok(())
}