KUBECONTEXT in PS1 bash prompt

gistfile1.bash

__kctx () {
  local ctx
  ctx="$(kubectl config current-context)"

  local col
  local el
  local b='\001\033[0m\033[38;5;88m\033[2m\002'
  local c='\001\033[0m\033[38;5;124m\033[1m\002'
  local u='\001\033[0m\033[38;5;88m\033[2m\002'
  if [[ $ctx == *"prod"* ]]; then
    col='\001\033[0m\033[1m\033[38;5;197m\002'
  else
    col='\001\033[38;5;88m\002'
  fi
  IFS='_' read -ra el <<< "$ctx"
  if [[ "${#el[@]}" = 4 ]]; then
    printf -v string $'%s%s%s_' "$b" "${el[0]}" "$u" "$c" "${el[1]}" "$u" "$b" "${el[2]}" "$u" "${col}" "${el[3]}" "$u"
    echo -ne "\001\033[38;5;88m\e[2m\002«${string::-1}»"
  else
    printf $'%s«%s»' "${col}" "${ctx}"
  fi
}

PS1='\[\033[38;5;33m\e[1m\]\u@\h\[\033[00m\]:\[\033[38;5;245m\e[1m\]\w $(__kctx) \[\033[00m\]\$ '