Function find_case_insensitive_directory 

pub fn find_case_insensitive_directory(
    directory: &Path,
    expected_name: &str,
) -> Result<Option<PathBuf>>

Finds one subdirectory in directory with ASCII case-insensitive name matching.

The same deterministic tie-break as find_case_insensitive_file, and the same caveat: find_case_insensitive_directories is what to reach for when several matches is the answer rather than a tie to break.

Used for resolving canonical install paths like Override/, modules/ and lips/ that mods or platform copies frequently case-fold differently.

Errors

Propagates the io::Error from reading directory or one of its entries. A directory that exists and holds no match is Ok(None).