how to update RPROMPT each time a key is pressed in zsh

In zsh, I want to create a function that updates RPROMPT when I have typed cd .. into the terminal. As a starting point, I know I can, for example, add the + character to my RBUFFER when I have typed cd .. by adding the following to my .zshrc:

function self-insert() {
  zle .self-insert
  if [[ $BUFFER == "cd .." ]]; then
    RBUFFER+="+"
  fi
  }
zle -N self-insert

I have tried modifying this command to change RPROMPT instead of RBUFFER as follows:

function self-insert() {
  zle .self-insert
  if [[ $BUFFER == "cd .." ]]; then
    RPROMPT="ABC"
    zle reset-prompt
  fi
  }
zle -N self-insert

The effect of this command is that my RPROMPT gets set to ABC, but only after I have executed the command, rather than once I have typed the command (as in the first example). I have also tried moving the zle reset-prompt command to different places in the function, but that doesn't seem to help.

posted 2 days ago

CC BY-SA 4.0

2d ago

Trevor‭

337 reputation 10 3 55 10