A quick ruby script for OS X notifications from the shell (even in tmux!)

notify.rb

#! /usr/bin/env ruby

require 'optparse'

@reattach = true
@title = "Shell Notification"

OptionParser.new do |opts|
  opts.banner = "Usage: notify [options] \"This is a notification\""
  opts.on("--no-reattach", "don't use 'reattach-to-user-namespace") do |noreattach|
    @reattach = false
  end

  opts.on("-ttitle", "--title=title", "set a title for the notification popup") do |title|
    @title = title
  end

  opts.on("-h", "--help", "show this message") do
    puts opts
    exit
  end
end.parse!

@message = ARGV[0]

unless defined? @message
  STDERR.puts "No message given!"
  exit 1
end

osacmd = "display notification \"#@message\" with title \"#@title\""
cmd = [
  @reattach ? "reattach-to-user-namespace" : "",
  "osascript -e",
  "'#{osacmd}'"
]

system cmd.join(" ")