Moved to http://github.com/fixlr/browser_stakeout

browser-stakeout.rb

#!/usr/local/env ruby
#
# Watch a set of files and open them in Safari and/or Firefox if they change. 
# The files should probably be plain HTML files, but I'm not the boss of you.
# Refreshes index.htm or index.html by default (if they exist)

require 'optparse'
require 'ostruct'

options = OpenStruct.new
OptionParser.new do |opts|
  opts.banner = "Usage: #{$0} [options] [files to watch]"
  options.safari  = true
  options.firefox = false
  options.index   = "index.htm[l]?"

  opts.on("-i", "--[no-]index", 
          "Specify the file to refresh whenever changes are found") do |i|
    options.index = i
  end

  opts.on("-s", "--[no-]safari", "Reload the page(s) in Safari") do |s|
    options.safari = s
  end
  
  opts.on("-f", "--[no-]firefox", "Reload the page(s) in Firefox") do |f|
    options.firefox = f
  end
  
  opts.on_tail("-h", "--help", "Show this message") do
    puts opts
    exit
  end
end.parse!

command = "open -g"

# Decide which browsers need to be refreshed.
browsers = []
browsers << "Safari.app" if options.safari
browsers << "Firefox.app" if options.firefox
raise "No Browsers Selected" if browsers.length == 0

files = {}
ARGV.each do |arg|
  Dir[arg].each do |file|
    files[file] = File.mtime(file)
  end
end

# Check to see if the file being refreshed is on the files list.
index_file = files.keys.find {|f| f =~ /#{options.index}/}

puts %{#{$0} is on the scene! 
Currently watching #{files.collect {|k,v| File.basename(k)}.join(', ')}\n\n}

loop do
  sleep 1

  changed_file, last_changed = files.find do |file, last_changed|
    File.mtime(file) > last_changed
  end

  if changed_file
    files[changed_file] = File.mtime(changed_file)
    puts "#{Time.now} => #{File.basename(changed_file)} changed"
    browsers.each do |b|
      system("#{command} -a #{b} #{index_file||changed_file}")
    end
  end
end