relative path helper for Bones

# helpers/path_helper.rb
module PathHelper
  def path_as_array
    path = (request.path_info || '').gsub(/^#{Bones.base}/, '')
    path = path.split('/').map {|e| e.empty? ? nil : e}.compact
  end
  
  def current_path(depth=-1)
    File.join('/', *[path_as_array[0..depth]])
  end

  def relative_path(path, depth=-1)
    File.expand_path(File.join(current_path(depth), path))
  end
end