usestd::path::PathBuf;/// Get the path to an existing `safaridriver`.
////// We can't install `safaridriver` if an existing one is not found because
/// Apple does not provide pre-built binaries. However, `safaridriver` *should*
/// be present by default.
pubfnget_safaridriver()->Result<PathBuf, failure::Error>{matchwhich::which("safaridriver"){Ok(p)=>Ok(p),Err(_)=>bail!("could not find `safaridriver` on the `$PATH`"),}}