build.rs

use anyhow::*;
use fs_extra::copy_items;
use fs_extra::dir::CopyOptions;
use std::env;
use std::result::Result::Ok;

fn main() -> Result<()> {
    for entry in glob::glob("res/**/*").expect("failed to read res/ glob :(") {
        match entry {
            Ok(path) => println!("cargo::rerun-if-changed={}", path.display()),
            Err(e) => eprintln!("glob error: {}", e),
        }
    }
    println!("cargo::rerun-if-changed=res");

    let out_dir = env::var("OUT_DIR")?;
    let mut copy_options = CopyOptions::new();
    copy_options.overwrite = true;
    let mut paths_to_copy = Vec::new();
    paths_to_copy.push("res/");
    copy_items(&paths_to_copy, out_dir, &copy_options)?;

    Ok(())
}