[fs] How could I know whether the target is a file or a folder?

[s3xysteak]

I want to use the copyFile function to copy a directory, but I don't think it can be used for that purpose. So, I plan to create a new function called copy that will recursively call copyFile. However, I'm unsure how to determine whether the target is a directory or a file, So I cannot know when to use copyFile or when to recursively call copy.

[s3xysteak]

Use a simply rust function to solve that:

fn is_dir(path: &str) -> Result<bool, String> {
    if let Ok(metadata) = fs::metadata(path) {
        Ok(metadata.is_dir())
    } else {
        Err("is_dir throw a error".to_string())
    }
}