On: Challenge: Implement CLI interface like that?

[emmelaich]

Reminds me of apenwarr's option parsing in bup.

http://apenwarr.ca/log/?m=201111

Had you seen that before?

Also, I love it; it's taking DRY to its necessary conclusion.

[halst → emmelaich]

Quite similar approach. But I think usage-pattern matching is where docopt shines.