class RDoc::RDoc

def normalized_file_list(relative_files, force_doc = false,
                         exclude_pattern = nil)
  file_list = {}
  relative_files.each do |rel_file_name|
    rel_file_name = rel_file_name.sub(/^\.\//, '')
    next if rel_file_name.end_with? 'created.rid'
    next if exclude_pattern && exclude_pattern =~ rel_file_name
    stat = File.stat rel_file_name rescue next
    case type = stat.ftype
    when "file" then
      mtime = (stat.mtime unless (last_modified = @last_modified[rel_file_name] and
                                  stat.mtime.to_i <= last_modified.to_i))
      if force_doc or RDoc::Parser.can_parse(rel_file_name) then
        file_list[rel_file_name] = mtime
      end
    when "directory" then
      next if UNCONDITIONALLY_SKIPPED_DIRECTORIES.include?(rel_file_name)
      basename = File.basename(rel_file_name)
      next if options.skip_tests && TEST_SUITE_DIRECTORY_NAMES.include?(basename)
      created_rid = File.join rel_file_name, "created.rid"
      next if File.file? created_rid
      dot_doc = File.join rel_file_name, RDoc::DOT_DOC_FILENAME
      if File.file? dot_doc then
        file_list.update(parse_dot_doc_file(rel_file_name, dot_doc))
      else
        file_list.update(list_files_in_directory(rel_file_name))
      end
    else
      warn "rdoc can't parse the #{type} #{rel_file_name}"
    end
  end
  file_list
end