gviz

A simple Dart package for writing Graphviz dot files.

final graph = Gviz()
      ..addNode('solo')
      ..addEdge('solo', 'solo');
print(graph);

This will produce:

digraph the_graph {
  solo;
  solo -> solo;
}

To create undirected graphs, use the constructor parameter like so: Gviz(isDirected:false).