def find_in(dir)
      results = {}

      Dir.glob("#{dir}/*") do |item|
        next if File.basename(item)[0] == ?.

        if File.directory?(item)
          results.update(find_in(item))
        else
          extension = Annotation.extensions.detect do |regexp, _block|
            regexp.match(item)
          end

          if extension
            pattern = extension.last.call(tag)
            results.update(extract_annotations_from(item, pattern)) if pattern
          end
        end
      end

      results
    end
def find_in(dir)
      results = {}

      Dir.glob("#{dir}/*") do |item|
        next if File.basename(item)[0] == ?.

        if File.directory?(item)
          results.update(find_in(item))
        else
          extension = Annotation.extensions.detect do |regexp, _block|
            regexp.match(item)
          end

          if extension
            pattern = extension.last.call(tag)
            results.update(extract_annotations_from(item, pattern)) if pattern
          end
        end
      end

      results
    end
Returns a hash that maps filenames under +dir+ (recursively) to arrays
 with their annotations. Files with extensions registered in
 <tt>Rails::SourceAnnotationExtractor::Annotation.extensions</tt> are
 taken into account. Only files with annotations are included.