Extension to the Oh My Zsh Agnoster theme

agnoster-extensions.zsh-theme

prompt_timestamp() {
  # Use timestamp to alert user that it's getting late. Time between 7 AM and
  # 8 PM is shown in green. Time between 8 PM and 12 AM is shown in yellow. Time
  # after 12 AM (but before 7 AM next morning) is shown in red.
  currTime=`date +%k%m`
  if [ $currTime -ge 700 -a $currTime -lt 2000 ]; then
    prompt_segment default green '[%t]'
  # Midnight is 0000, so can't compare with it easily
  elif [ $currTime -ge 2000 -a $currTime -le 2359 ]; then
    prompt_segment default yellow '[%t]'
  else
    prompt_segment default red '[%t]'
  fi
}

build_rprompt() {
  RETVAL=$?
  prompt_timestamp
}
RPROMPT='%{%f%b%k%}$(build_rprompt) '