OUT_DIR returns incorrect directory

[violetastcs]

Problem

I have a build-rs that contains the following:

use std::fs::copy;
use std::io;

fn main() -> io::Result<()> {
	println!("cargo:rerun-if-changed=res/*");

	let out_dir = std::env::var("OUT_DIR").unwrap();
	
	for x in std::fs::read_dir("res/")?
		.filter_map(Result::ok)
		.filter(|item| item.file_type().unwrap().is_file())
		.map(|item| (item.path(), format!("{}/res/{}", out_dir, item.file_name()
			.to_string_lossy()
			.to_owned()
		)))
		.map(|(from, to)| {
			println!("from: {:?}, to: {}", from, to);
			copy(from, to)
		}) 
	{
		x?;
	}

	Ok(())
}

Which should copy every file in the folder res into $OUT_DIR/res. However, when I try and build my project, I get an error:

error: failed to run custom build command for `gfx v0.1.0 (/home/violet/projects/gfx)`

Caused by:
  process didn't exit successfully: `/home/violet/projects/gfx/target/debug/build/gfx-1385f1dbcfa44ce1/build-script-build` (exit code: 1)
  --- stdout
  cargo:rerun-if-changed=res/*
  from: "res/cube-diffuse.jpg", to: /home/violet/projects/gfx/target/debug/build/gfx-52f2df593a0e8de1/out/res/cube-diffuse.jpg

which appears to show that what is contained in OUT_DIR is incorrect.

Notes
I'm running Void Linux, and I'm using rustc version 1.51.0-nightly and cargo version 1.50.0-nightly.

[ehuss]

fs::copy does not create intermediate directories. I don't see anything creating the res directory in OUT_DIR.

Also, FYI, rerun-if-changed does not support * globbing. A recent change (#8973) allows it to be a directory, which should be in the next beta.

[violetastcs]

fs::copy does not create intermediate directories. I don't see anything creating the res directory in OUT_DIR.

Also, FYI, rerun-if-changed does not support * globbing. A recent change (#8973) allows it to be a directory, which should be in the next beta.

ah thank you for the help :)