Docopt is great until you start digging in and discover the author doesn't have the first clue about parsing. I don't mean in the sense of "weird opinions about

Docopt is great until you start digging in and discover the author doesn't have the first clue about parsing. I don't mean in the sense of "weird opinions about recursive descent", but in the literal sense of "has no idea what parsing is or means". The internal implementation is a gigantic clusterfuck of the worst sort of poorly constructed, unmaintainable code you could imagine. I maintain two ports of docopt and I'm telling you not to use it.