Function duplicate 

pub fn duplicate(
    base: &Path,
    game: &str,
    from: &str,
    to: &str,
) -> Result<PathBuf>

Duplicates a profile directory (recursive copy) under a new name.

Symlinks are skipped rather than followed or recreated, so the copy cannot be made to write outside to.

Errors

Errors if to already exists. A failed copy can leave to partially written; it is not cleaned up.