# File lib/nanoc/base/source_data/site.rb, line 180
    def setup_child_parent_links
      teardown_child_parent_links

      items = @items.sort_by { |i| i.identifier }
      items.each_with_index do |item, index|
        # Get parent
        next if index == 0
        parent_identifier = item.identifier.sub(/[^\/]+\/$/, '')
        parent = nil
        (index-1).downto(0) do |candidate_index|
          candidate = items[candidate_index]
          if candidate.identifier == parent_identifier
            parent = candidate
          elsif candidate.identifier[0..parent_identifier.size-1] != parent_identifier
            break
          end
        end
        next if parent.nil?

        # Link
        item.parent = parent
        parent.children << item
      end
    end