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/gluon
    
    the code of the file until where you have to start completion: use std::{
    env,
    fs::File,
    io::{Read, Write},
    path::Path,
};

use {itertools::Itertools, walkdir::WalkDir};

use gluon_base::filename_to_module;

#[cfg(feature = "test")]
mod gen_skeptic {
    use little_skeptic as skeptic;

    use std::{
        env,
        fs::{self, File},
        io::Read,
        path::{Path, PathBuf},
    };

    
fn example_24_up_to_date() {
    let mut readme = String::new();
    {
        let mut readme_file = File::open("README.md").unwrap();
        readme_file.read_to_string(&mut readme).unwrap();

        let offset = readme.find("[24 game]").expect("24 game tag");
        let block_start = readme[offset..].find("```").expect("block start") + offset;
        let inside_block_start =
            readme[block_start..].find('\n').expect("inner block start") + block_start + 1;
        let block_end =
            readme[(block_start + 3)..].find("```").expect("block end") + block_start + 3;

        let example_24_in_readme = readme
            .drain(inside_block_start..block_end)
            .collect::<String>();

        {
            let mut file = File::open("examples/24.glu").unwrap();
            let mut example = String::new();
            file.read_to_string(&mut example).unwrap();
            // No need to write anything if it is up to date
            if example == example_24_in_readme {
                return;
            }
            readme.insert_str(inside_block_start, &example);
        }
    }
    let mut readme_file = File::create("README.md").unwrap();
    readme_file.write_all(readme.as_bytes()).unwrap();
}