I'm adjusting my zsh prompt, based upon the dallas theme and the dstufft theme from oh-my-zsh. I love how dallas has various sections of the prompt contained in variables, which makes it much easier to understand what's going on.
The problem is, these strings are evaluated once for expansion. So when I attempt to use something dynamic, such as the ${PWD/#$HOME/~}
of dstufft, then it no longer updates dynamically.
How can I get the best of both worlds? I'd like the prompt broken up into subsections that are evaluated each time the prompt gets written.