+ files.sort_by(|x, y| {
+ match x.path().file_prefix().cmp(&y.path().file_prefix()) {
+ Ordering::Equal => (),
+ ord => return ord,
+ }
+ // Sort rs files before the others if they share the same prefix. So when we see
+ // the file prefix for the first time and it's not a rust file, it means the rust
+ // file has to be missing.
+ match (
+ x.path().extension().and_then(OsStr::to_str),
+ y.path().extension().and_then(OsStr::to_str),
+ ) {
+ (Some("rs"), _) => Ordering::Less,
+ (_, Some("rs")) => Ordering::Greater,
+ _ => Ordering::Equal,
+ }
+ });