# File lib/sass/importers/filesystem.rb, line 117
      def find_real_file(dir, name, options)
        found = possible_files(remove_root(name)).map do |f, s|
          path = (dir == "." || Pathname.new(f).absolute?) ? f : "#{dir}/#{f}"
          Dir[path].map do |full_path|
            full_path.gsub!(REDUNDANT_DIRECTORY, File::SEPARATOR)
            [full_path, s]
          end
        end
        found = Sass::Util.flatten(found, 1)
        return if found.empty?

        if found.size > 1 && !@same_name_warnings.include?(found.first.first)
          found.each {|(f, _)| @same_name_warnings << f}
          relative_to = Pathname.new(dir)
          if options[:_line]
            # If _line exists, we're here due to an actual import in an
            # import_node and we want to print a warning for a user writing an
            # ambiguous import.
            candidates = found.map {|(f, _)| "    " + Pathname.new(f).relative_path_from(relative_to).to_s}.join("\n")
            Sass::Util.sass_warn "WARNING: On line \#{options[:_line]}\#{\" of \#{options[:filename]}\" if options[:filename]}:\n  It's not clear which file to import for '@import \"\#{name}\"'.\n  Candidates:\n\#{candidates}\n  For now I'll choose \#{File.basename found.first.first}.\n  This will be an error in future versions of Sass.\n"
          else
            # Otherwise, we're here via StalenessChecker, and we want to print a
            # warning for a user running `sass --watch` with two ambiguous files.
            candidates = found.map {|(f, _)| "    " + File.basename(f)}.join("\n")
            Sass::Util.sass_warn "WARNING: In \#{File.dirname(name)}:\n  There are multiple files that match the name \"\#{File.basename(name)}\":\n\#{candidates}\n"
          end
        end
        found.first
      end