class Jekyll::Reader

def read_directories(dir = "")

Returns nothing.

dir - The String relative path of the directory to read. Default: ''.

filter_entries.
that will become part of the site according to the rules in
Recursively traverse directories to find pages and static files 
def read_directories(dir = "")
  base = site.in_source_dir(dir)
  return unless File.directory?(base)
  dot_dirs = []
  dot_pages = []
  dot_static_files = []
  dot = Dir.chdir(base) { filter_entries(Dir.entries("."), base) }
  dot.each do |entry|
    file_path = @site.in_source_dir(base, entry)
    if File.directory?(file_path)
      dot_dirs << entry
    elsif Utils.has_yaml_header?(file_path)
      dot_pages << entry
    else
      dot_static_files << entry
    end
  end
  retrieve_posts(dir)
  retrieve_dirs(base, dir, dot_dirs)
  retrieve_pages(dir, dot_pages)
  retrieve_static_files(dir, dot_static_files)
end