a7cacfff1c
The existing code for handling a `HEAD`-only formula involves two return values that can be `nil` but this isn't apparent because the related methods aren't typed. This adds type signatures to the methods and updates the livecheck code to account for `nil` return values (making it clear which methods can return `nil`). Co-authored-by: Mike McQuaid <mike@mikemcquaid.com>
Library
This directory contains all the code run by the official brew command in Homebrew and all formulae (package descriptions) in taps (repositories containing formulae) in Taps subdirectories.