use fs_extra::copy_items; use fs_extra::dir::CopyOptions; use std::env; fn main() { // export js test folder to OUT_DIR export_stdlib(); } fn export_stdlib() { let out_dir = env::var("OUT_DIR").unwrap(); let mut options = CopyOptions::new(); options.overwrite = true; copy_items(&vec!["tests/contract"], out_dir, &options).unwrap(); }