invoker

println!("{}", path);

let store = Store::default();
let module = Module::from_file(&store, &path).expect("Failed to load module");

let mut wasi_env = WasiState::new("Gut")
    .finalize()
    .expect("Failed to create wasi env");

let import_object = wasi_env
    .import_object(&module)
    .expect("Failed to create import object");
let instance =
    Instance::new(&module, &import_object).expect("Failed to create instance");

let start = instance
    .exports
    .get_function("gut_export_functions")
    .unwrap();
let res = start.call(&[]).unwrap();

plugin

use std::ffi::CString;
use std::os::raw::c_char;
use std::time::{SystemTime, UNIX_EPOCH};

#[no_mangle]
pub extern "C" fn gut_export_functions() -> *mut c_char {
    let c_str_song = CString::new(r#"["time_now"]"#).unwrap();
    c_str_song.into_raw()
}

#[no_mangle]
pub extern "C" fn gut_export_descriptions() -> *mut c_char {
    let c_str_song = CString::new(r#"["Prints the current time in milliseconds"]"#).unwrap();
    c_str_song.into_raw()
}

#[no_mangle]
fn time_now() {
    let now = SystemTime::now();
    let epoch = now.duration_since(UNIX_EPOCH).expect("Failed to get time");

    println!("{}", epoch.as_millis())
}