For anyone who hasn't seen it, I highly recommend structopt over clap. It is a wrapper around clap which provides type safe parsing of CLI arguments into a struct you define. It is also what TFA uses.
Wholesome internet people unwilling to say the word "fucking"
It's: The Fucking Article
Are you implying fuck is unwholesome? Why would you think that? I’m intrigued.
As an Australian, no, not at all, but many people are certainly quite sensitive about such things and we generally have to acknowledge/modify behaviour as decent internet citizens because of it.