# File lib/sass/files.rb, line 69
    def find_file_to_import(filename, load_paths)
      was_sass = was_scss = false
      original_filename = filename

      if [".sass", ".scss"].include?(filename[-5..-1])
        was_sass = filename[-5..-1] == ".sass"
        was_scss = filename[-5..-1] == ".scss"
        filename = filename[0...-5]
      elsif filename[-4..-1] == ".css"
        return filename
      end

      new_filename = nil
      load_paths = load_paths.uniq
      load_paths.each do |load_path|
        new_filename ||= find_full_path("#{filename}.sass", load_path) unless was_scss
        new_filename ||= find_full_path("#{filename}.scss", load_path) unless was_sass
      end

      return new_filename if new_filename
      unless was_sass || was_scss
        Haml::Util.haml_warn "WARNING: Neither \#{filename}.sass nor .scss found. Using \#{filename}.css instead.\nThis behavior is deprecated and will be removed in a future version.\nIf you really need \#{filename}.css, import it explicitly.\n"
        return filename + '.css'
      end

      message = "File to import not found or unreadable: #{original_filename}.\n"
      if load_paths.size == 1
        message << "Load path: #{load_paths.first}"
      else
        message << "Load paths:\n  " << load_paths.join("\n  ")
      end

      raise SyntaxError.new(message)
    end