class YARD::CLI::Diff

def run(*args)
  registry = optparse(*args).map do |gemfile|
    if @use_git
      load_git_commit(gemfile)
      all_objects
    elsif load_gem_data(gemfile)
      log.info "Found #{gemfile}"
      all_objects
    else
      log.error "Cannot find gem #{gemfile}"
      nil
    end
  end.compact
  return if registry.size != 2
  first_object = nil
  [["Added objects", "A", added_objects(*registry)],
      ["Modified objects", "M", modified_objects(*registry)],
      ["Removed objects", "D", removed_objects(*registry)]].each do |name, short, objects|
    next if short == "M" && @modified == false
    next if objects.empty?
    last_object = nil
    all_objects_notice = false
    log.puts name + ":" unless @compact
    objects.sort_by(&:path).each do |object|
      if !@list_all && last_object && object.parent == last_object
        log.print " (...)" unless all_objects_notice
        all_objects_notice = true
        next
      elsif @compact
        log.puts if first_object
      else
        log.puts
      end
      all_objects_notice = false
      log.print "" + (@compact ? "#{short} " : "  ") +
                object.path + " (#{object.file}:#{object.line})"
      last_object = object
      first_object = true
    end
    unless @compact
      log.puts; log.puts
    end
  end
  log.puts if @compact
end