homebrew-protolint
How do I install these formulae?
brew install yoheimuta/protolint/protolint
Or brew tap yoheimuta/protolint and then brew install protolint.
Or install via URL (which will not receive updates):
brew install https://raw.githubusercontent.com/yoheimuta/homebrew-protolint/master/Formula/protolint.rb
Documentation
brew help, man brew or check Homebrew's documentation.