begin
  require 'terminal-notifier'
rescue LoadError
  # NOOP - "TerminalNotifier" is optional
  # will only be used if it is installed!
end

def notify(message, options = {}, verbose = false)
  # print the given message to STDERR, if the
  # script is running with "--verbose" option
  subtitle = options[:subtitle]
  warn(subtitle ? "#{subtitle}: #{message}" : message) if $VERBOSE
  # send a given message to the Mac OS X Notification Center
  # but only if the git-multi script is running interactively
  # and if the "terminal-notifier" gem has been installed...
  if $INTERACTIVE && defined?(TerminalNotifier)
    options[:title] ||= 'git-multi'
    TerminalNotifier.notify(message, options, verbose)
  end
end