# File lib/kwala/lib/cycle_detector.rb, line 116
  def build_graph_from_edges(edges)
    edges.each do |f|
      cf = ReqWalker.clean_file(f)
      if (!@graph.key?(cf) || @graph[cf].state == Node::UNVISITED)
        build_node(f, cf)
      end
    end
  end