Simple Sub-Commands for Go using flag package - can be used via copy/paste too, because it's small and it's just some functions!
Go get master:
$ go get -u -v github.com/dc0d/clarg
Go get v3:
$ go get -u -v gopkg.in/dc0d/clarg.v3
Go get v2:
$ go get -u -v gopkg.in/dc0d/clarg.v2