This script helps to compare and merge an old version of YAML local file of your target language against an up-to-date master language file

locale_diff.rb

# This script helps to compare and merge an old version of YAML local file of your target language against an up-to-date master language file, which contains new strings
# It still need some improvments so please do not forget to validate the YAML by pasteing it into http://yamllint.com/

# Run: curl https://gist.github.com/raw/7726555/locale_diff.rb | ruby - client.en.yml client.ar.yml > new_client.ar.yml
require 'rubygems'
require 'yaml'
require 'pp'
 
master_local = ARGV[0]
my_local = ARGV[1]
master = YAML.load_file(master_local )
local = YAML.load_file(my_local )
 
def diff(root, compared, structure = [])
  $level += 1
  root.each do |key,value|
	if value.class != String
    	print "  "*($level-1) 
	    print key + ":" + "\n"
    end
    next_root     = root[key]
    next_compared = compared.nil? ? nil : compared[key]
    new_structure = structure.dup << key
    if compared.nil? || compared[key].nil?
	  if value.class == String
		print "  "*($level-1) 
		print key
		string_quote = value.include?("\"") ? "'" : "\""
		print ": " + string_quote + value + string_quote + "\n"
	  end	
	else
	 if next_compared.class == String
		print "  "*($level-1) 
		print key
		string_quote = next_compared.include?("\"") ? "'" : "\""
		print ": " + string_quote + next_compared + string_quote + "\n"
	end
	end
    diff(next_root, next_compared, new_structure) if next_root.kind_of? Hash
  end
  $level -= 1
 # print "\n" # uncomment if you wish to have an empty line when the indentation level changes
end

$level=0
diff(master, local, [my_local])
 

Run:
curl https://gist.github.com/raw/7726555/locale_diff.rb | ruby - client.en.yml client.ar.yml > new_client.ar.yml