I wonder how much of the commands do this, do that, can be put in a batch file? Seems much easier to comment and distribute that than to follow a blog post over

I wonder how much of the commands do this, do that, can be put in a batch file? Seems much easier to comment and distribute that than to follow a blog post over once every few months to rotate your key. Would anyone know if and how much can be done in such a way? Is the bath-mode only capable of instructing the generation of a single key? Must we resort to other programmatic invocations of gpg?