class ActionView::Digestor

def tree(name, finder, partial = false, seen = {})

Create a dependency tree for template named +name+.
def tree(name, finder, partial = false, seen = {})
  logical_name = name.gsub(%r|/_|, "/")
  options = {}
  options[:formats] = [finder.rendered_format] if finder.rendered_format
  if finder.disable_cache { finder.exists?(logical_name, [], partial, [], options) }
    template = finder.disable_cache { finder.find(logical_name, [], partial, [], options) }
    finder.rendered_format ||= template.formats.first
    if node = seen[template.identifier] # handle cycles in the tree
      node
    else
      node = seen[template.identifier] = Node.create(name, logical_name, template, partial)
      deps = DependencyTracker.find_dependencies(name, template, finder.view_paths)
      deps.uniq { |n| n.gsub(%r|/_|, "/") }.each do |dep_file|
        node.children << tree(dep_file, finder, true, seen)
      end
      node
    end
  else
    logger.error "  '#{name}' file doesn't exist, so no dependencies"
    logger.error "  Couldn't find template for digesting: #{name}"
    seen[name] ||= Missing.new(name, logical_name, nil)
  end
end