ruby-optimist 3.0.0-2 (ppc64el binary) in ubuntu oracular

 Optimist is a commandline option parser for Ruby that just
 gets out of your way. One line of code per option is all you need to write.
 .
 For that, you get a nice automatically-generated help page, robust option
 parsing, command subcompletion, and sensible defaults for everything you
 don't specify.