Support adding new file after compilation

[jc4x4]

I noticed that if I add a new file after a build, the new file would not be included in the next run. I have to manually clean the build cache via cargo clean. Is there a better/automatic way of doing this?

[dtolnay]

I think if you add a build.rs containing the following (where path/to/dir is the relative path from the directory containing Cargo.toml to the directory containing the automatically included files) then it'll rebuild when a file is added:

fn main() {
    println!("cargo:rerun-if-changed=path/to/dir");
}

[jc4x4]

Right, this is also what I got after searching for a while. I can confirm it works well. It would be nice to call this out in the example in the README.md. Here is a PR: #23.

i.e.

fn main() {
    println!("cargo:rerun-if-changed=tests/regression");
}