#: * `--version`: #: Print the version number of Homebrew to standard output and exit. module Homebrew def __version # As a special case, `--version` is implemented directly in `brew.rb`. This # file merely serves as a container for the documentation. It also catches # the case where running `brew --version` with additional arguments would # produce a rather cryptic message about a non-existent `--version` command. raise UsageError end end