Browser Auto Refresh Script - Ruby Watcher

gistfile1.rb

# This file has been edited for my own usage and shared here, credits to Brett Terpstra.

#!/usr/bin/env ruby
# watch.rb by Brett Terpstra, 2011 <http://brettterpstra.com>
# with credit to Carlo Zottmann <https://github.com/carlo/haml-sass-file-watcher>
# =============================
# Code from: http://brettterpstra.com/2011/03/07/watch-for-file-changes-and-refresh-your-browser-automatically/
# To install use: chmod a+x watcher.rb

# Run with: ruby watcher.rb <folder/to/watch> <keyword>
# eg: ruby watcher.rb ~/Projects lvh.me

trap("SIGINT") { exit }

if ARGV.length < 2
  puts "Usage: #{$0} watch_folder keyword"
  puts "Example: #{$0} . mywebproject"
  exit
end

dev_extension = 'dev'
filetypes = ['css','html','htm','php','rb','erb','less','js', 'haml']
watch_folder = ARGV[0]
keyword = ARGV[1]
puts "Watching '#{watch_folder}' and subfolders for changes in project files..."

while true do
  files = []
  filetypes.each {|type|
    files += Dir.glob( File.join( watch_folder, "**", "*.#{type}" ) )
  }
  new_hash = files.collect {|f| [ f, File.stat(f).mtime.to_i ] }
  hash ||= new_hash
  diff_hash = new_hash - hash

  unless diff_hash.empty?
    hash = new_hash

    diff_hash.each do |df|
      puts "Detected a change in '#{df[0]}', refreshing Google Chrome..."
			%x{osascript<<ENDGAME
				tell application "Google Chrome"
					set windowList to every window
					repeat with aWindow in windowList
						set tabList to every tab of aWindow
						repeat with atab in tabList
							if (URL of atab contains "#{keyword}") then
								tell atab to reload
							end if
						end repeat
					end repeat
				end tell

				(* 
					### Start commented code
					### This is support for other browsers

					tell application "Safari"
			          	set windowList to every window
			          	repeat with aWindow in windowList
			          		set tabList to every tab of aWindow
			          		repeat with atab in tabList
			          			if (URL of atab contains "#{keyword}") then
			          			  tell atab to do javascript "window.location.reload()"
			          			end if
			          		end repeat
			          	end repeat
			        end tell
					tell app "Firefox" to activate
						tell app "System Events"
						keystroke "r" using command down
					end tell

					### End commented code
				*)
			}
    end
  end

  sleep 1
end