p10k display
  dir=short|long|auto
  right=hide|show
  empty_line=print|show|hide
  ruler=print|show|hide
  segment:kubecontext=show|hide
  gap=show|hide

`print` controls all future prompts; it's weird to use it in POWERLEVEL9K_DISPLAY_PAST but it's not contradictory

# default values
POWERLEVEL9K_DISPLAY_NEW_TTY=()
POWERLEVEL9K_DISPLAY_CURRENT=()
POWERLEVEL9K_DISPLAY_PAST=()
POWERLEVEL9K_NEW_TTY_MAX_AGE_SECONDS=inf

# new way to show empty line
POWERLEVEL9K_DISPLAY_NEW_TTY=(empty_line=hide)
POWERLEVEL9K_DISPLAY_CURRENT=(empty_line=print)
POWERLEVEL9K_NEW_TTY_MAX_AGE_SECONDS=5

# deprecated.
POWERLEVEL9K_SHOW_RULER
POWERLEVEL9K_PROMPT_ADD_NEWLINE

if POWERLEVEL9K_PROMPT_ADD_NEWLINE is true; then
  if any of the new flags are set {
    print a warning and do nothing
  } else {
    POWERLEVEL9K_DISPLAY_NEW_TTY=(empty_line=hide)
    POWERLEVEL9K_DISPLAY_CURRENT=(empty_line=print)
  }
fi

if POWERLEVEL9K_SHOW_RULER is true; then
  if any of the new flags are set {
    print a warning and do nothing
  } else {
    POWERLEVEL9K_DISPLAY_CURRENT=(ruler=show)
  }
fi

POWERLEVEL9K_DISPLAY_CURRENT=(ruler=show segment:kubecontext=hide segment:time=hide)
POWERLEVEL9K_DISPLAY_PAST=(ruler=hide segment:time=show)
POWERLEVEL9K_DISPLAY_NEW_TTY=(ruler=hide)
POWERLEVEL9K_NEW_TTY_MAX_AGE_SECONDS=5
POWERLEVEL9K_TIME_UPDATE_ON_COMMAND=true

# $BUFFER  current buffer
# $1       the first word in $BUFFER after alias expansion
function p10k-on-buffer-change() {
  if [[ $2 == (|*/)kubectl ]]; then
    p10k display segment:kubecontext=show
  else
    p10k display segment:kubecontext=hide
  fi
}