Highlight non-zero exit status for bash-it

prompt_command.bash

function prompt_command() {
    highlight_non_zero_exit
    PS1="\n${yellow}$(ruby_version_prompt) ${purple}\h ${reset_color}in ${green}\w\n${bold_cyan}$(scm_char)${green}$(scm_prompt_info) ${green}→${reset_color} "
}

function highlight_non_zero_exit() {
  PASS=$?
  if [[ $PASS != 0 ]]; then
    printf "${echo_bold_red}> Exit status $PASS <${echo_reset_color}\n"
  fi
}

PROMPT_COMMAND=prompt_command;