You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: build.rs
    path of file: ./repos/MoonZoon/crates/mzoon
    
    the code of the file until where you have to start completion: use ignore::WalkBuilder;
use std::{env, ffi::OsStr, fs::File, path::Path};

// https://doc.rust-lang.org/cargo/reference/build-scripts.html

macro_rules! instruction {
    ($($arg: tt)*) => {
        println!($($arg
    
fn create_new_project_tar() {
    let out_dir = env::var_os("OUT_DIR").unwrap();
    let file = File::create(Path::new(&out_dir).join("new_project.tar")).unwrap();
    let mut tar_builder = tar::Builder::new(file);

    let new_project_path = Path::new("new_project");
    let extra_ignored_files = [OsStr::new("Makefile.toml"), OsStr::new("Cargo.lock")];

    for entry in WalkBuilder::new(new_project_path).hidden(false).build() {
        let path = entry.unwrap().into_path();
        if path.is_dir() || extra_ignored_files.contains(&path.file_name().unwrap()) {
            continue;
        }
        let tar_path = path.strip_prefix(new_project_path).unwrap();
        tar_builder
            .append_file(&tar_path, &mut File::open(&path).unwrap())
            .unwrap();
    }
    tar_builder.finish().unwrap();
}