merge new file entries into the old translated strings.xml for android translators (doesn't override original files)

xmlmerge.rb

require 'rubygems'
require 'xmlsimple'

old_file = ARGV[0] rescue nil
new_file = ARGV[1] rescue nil
output   = ARGV[2] rescue nil

if old_file.nil? or new_file.nil?
  puts "#{$0} <old_string.xml> <new_string.xml> [output_string.xml]"
  exit
end

old_data = XmlSimple.xml_in(old_file, { 'KeyAttr' => 'name', 'KeepRoot' => true })
new_data = XmlSimple.xml_in(new_file, { 'KeyAttr' => 'name', 'KeepRoot' => true })


new_data['resources'][0]['string'].each do |key, value|
  next unless old_data['resources'][0]['string'][key].nil?
  old_data['resources'][0]['string'][key] = value
end
#p new_data

doc = XmlSimple.xml_out(new_data, { 'KeyAttr'         => 'name',
                                    'KeepRoot'        => true,
                                    'Indent'          => "    ",
                                    'XmlDeclaration'  => '<?xml version="1.0" encoding="utf-8"?>',
                                    'NoEscape'        => true
                                  })

if output.nil?
  puts doc
else
  File.open(output,'w') do |file|
    file.puts doc
  end
end