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a Ruby version that dynamically gets the list of Login Items to launch
Authored by: HotFusionMan on Oct 20, '10 09:34:49PM

I really wanted the script to automatically know what my Login Items are instead of manually making aliases in a folder for it. Based on this previous comment I was able to bang out a Ruby version (much quicker for me than modifying the AppleScript code). It retains the Growl setup but omits the capability of launching the Login Items in the background (so I could actually finish the script tonight rather than next week ;) ).

Save the following code to a file and chmod +x that file in (or whatever shell you prefer) so it can be executed. I haven't gone all the way through to testing making it the sole Login Item the way one would ultimately want to, but I did confirm it works with the stock /usr/bin/ruby without needing any 3rd-party libraries (at least on Snow Leopard, but I believe any version of Ruby >= 1.8 should also work, because that's when REXML was included into the Ruby standard library).

Caveat emptor.

#!/usr/bin/env ruby

require 'rexml/document'

def set_up_Growl
  if `ps -ax | grep GrowlHelperApp\.app | grep -v grep` == '' then
    system( 'open /Library/PreferencePanes/Growl.prefPane/Contents/Resources/' )


loginitems_plist_xml = `plutil -convert xml1 -o - -- ~/Library/Preferences/` loginitems_plist_xml ).each_element( '/plist/dict/dict/array/dict/dict/dict' ) { |login_item_dict|
  index_of_Path_key = i = 0 ; elements = []
  login_item_dict.each_element { |e|
    elements << e

    if e.text == 'Path' then
      index_of_Path_key = i

    i += 1

  login_item = elements[index_of_Path_key + 1].text
  system( "open '#{login_item}'" )
  sleep( 1 )


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