This code was at the end of my .zlogin on my mac and was causing .zlogin:152: parse error near `\n'. The problem is rather bone-headed, but I went through trying to :set ff=unix, :set ff=mac in vim to try and remedy bad line endings.

function notify_preexec() {
  # Note the date when the command started, in unix time.
  CMD_START_DATE=$(date +%s)
  # Store the command that we're running.
  CMD_NAME="$1"
}

function notify_precmd() {
  # Proceed only if we've run a command in the current shell.
  # Proceed only if we've run a command in the current shell.

function notify_precmd() {
  # Proceed only if we've run a command in the current shell.
  if ! [[ -z $CMD_START_DATE ]]; then
    # Note current date in unix time
    CMD_END_DATE=$(date +%s)
    # Store the difference between the last command start date vs. current date.
    CMD_ELAPSED_TIME=$(($CMD_END_DATE - $CMD_START_DATE))
    # Store an arbitrary threshold, in seconds.
    CMD_NOTIFY_THRESHOLD=240

    if [[ $CMD_ELAPSED_TIME -gt $CMD_NOTIFY_THRESHOLD ]]; then
      # Beep or visual bell if the elapsed time (in seconds) is greater than threshold
      # Send a notification
      if [[ "$CMD_NAME" =~ 'rake' ]]; then
        say "$CMD_NAME FINISHED IN $CMD_ELAPSED_TIME SECONDS"
      fi
      unset CMD_NAME
      unset CMD_START_DATE
    fi
  fi
}

See it yet?

function notify_precmd() {
  # Proceed only if we've run a command in the current shell.
  # Proceed only if we've run a command in the current shell.

function notify_precmd() {

I somehow opened up the notify_precmd() function twice. I was mostly focusing on a missing fi and mismatched parens/braces.