Rake task to compare Spree locale file with 'baseline'

spree_i18n_compare.rake

desc "compare spree en.yml with i18n da.yml"
task :compare do
  require 'open-uri'
  core = %w[api core dash promo].inject({}) do |memo, name|
    memo.deep_merge YAML.load(open "https://raw.github.com/spree/spree/#{ENV['branch'] || 'master'}/#{name}/config/locales/en.yml")
  end
  other = YAML.load_file File.expand_path('../../../config/locales/da.yml', __FILE__)
  en, da = core['en'], other['da']
  puts ["=" * 60, "* checking en against da", "=" * 60].join("\n")
  compare_yaml_hash en, da
  puts ["=" * 60, "* checking da against en", "=" * 60].join("\n")
  compare_yaml_hash da, en
end

def compare_yaml_hash(hash1, hash2, context = [])
  hash1.each do |key, value|

    unless hash2.key?(key)
      puts "Missing key : #{key} in path `#{context.join(".")}` (#{value})"
      next
    end

    if value.is_a?(Hash)
      if hash2[key]
        compare_yaml_hash(value, hash2[key], (context + [key]))
      else
        puts "Missing context for path `#{context.join(".")}.#{key}`"
      end
      next
    end
  end
end