Blog author here. Long story short I got frustrated with distributing Ruby cli apps and decided to switch to Go for speed and distribution.
I also created a nice cli library built on top of the Go flag package. I've been having a lot of fun in Go so far and encourage anyone who hasn't given it a shot to try it out.
The only pep-peeve of mine is that I'm not a huge fan of using JSON as a configuration mechanism. I much preferred having a Ruby file for configuration. My middle ground here is using a system ruby via /usr/bin/env ruby and generating the necessary JSON output for people that want the nice syntax.
I also created a nice cli library built on top of the Go flag package. I've been having a lot of fun in Go so far and encourage anyone who hasn't given it a shot to try it out.
https://github.com/codegangsta/cli