locale_differ.rb

# encoding: utf-8

class LocaleDiffer
  RED = 31
  GREEN = 32

  def initialize
    load_locales
  end

  def print
    all_keys = @locales_and_keys.values.flatten.uniq.sort

    key_length = all_keys.inject(0) { |value, key| value < key.length ? key.length : value }

    all_keys.each do |key|
      next if @locales_and_keys.keys.none? { |locale| locale_has_key?(locale, key) }
      puts [
        key.ljust(key_length.succ),
        @locales_and_keys.keys.map { |locale| check_for_key(locale, key) }
      ].join(" ")
    end
  end

  private

  def load_locales
    @locales_and_keys = {}
    Dir['config/locales/{sv,en}.yml'].each do |file|
      locale = File.basename(file, ".*")
      yaml = YAML.load_file(file)
      @locales_and_keys[locale] = get_keys(yaml[locale])
    end
  end

  def locale_has_key?(locale, key)
    @locales_and_keys[locale].include?(key)
  end

  def check_for_key(locale, key)
    color = locale_has_key?(locale, key) ? GREEN : RED
    format("\e[%dm%s\e[0m", color, locale)
  end

  def get_keys(lang, path = [])
    lang.map do |k, v|
      case v
      when Hash
        get_keys(v, path + [k])
      when String
        [path + [k]].join(".")
      else
        raise "wtf? #{ v }"
      end
    end.flatten
  end
end

LocaleDiffer.new.print