syncs keys from en.yml to other exisiting locale files

sync_locales

#!/usr/bin/env ruby

require 'yaml'
require 'active_support'

RAILS_ROOT = File.expand_path(File.dirname(__FILE__) + '/../')
files = Dir.glob("#{RAILS_ROOT}/config/locales/*.yml")
locales = files.map{|f| File.basename(f, '.yml')}

def flat_hash(hash, k = nil)
  return {k => hash} unless hash.is_a?(Hash)
  hash.inject({}){ |h, v| h.merge! flat_hash(v[-1], [k,v[0]].compact.join('.')) }
end

def load_yaml(f)
  YAML.load(File.read(f))
end

def locale_code(f)
  File.basename(f, '.yml')
end

en_file = files.grep(/en\.yml/).first
en = flat_hash(load_yaml(en_file)["en"])

(files - [en]).each do |f|

  locale = locale_code f
  translations = flat_hash load_yaml(f)[locale]


  en.each do |key, value|
   translations[key] = value unless translations.has_key?(key)
  end

  rebuild = {}
  translations.sort.each do |k,v|
    unflattened = k.split('.').reverse.inject(v){|a, b| Hash[b, a]}
    rebuild.deep_merge! unflattened
  end

  file = File.open(f, 'w')
  file.write Hash[locale,rebuild].to_yaml
  file.close
end

Thanks, this is exactly what we were looking for!