Using IDA Pro to generate Control Flow Graphs

[chants]

Does anyone know a simple method to take IDA Pro to generate Control Flow Graphs (CFG) for each function in a very basic numbered edge format e.g. to graphviz or simply a list of successor nodes. The edges should be ordered by their occurrence or scanning/memory order. In other words, something like:

1 -> 2;
2 -> 3;
2 -> 4;
3 -> 5;
4 ->5;

Or even without the edges properly ordered as just a vertex successor list:

[2], [3, 4], [5], [5]

I know I could write a plugin to do this but it seems like such a basic task to generate CFGs that it would be nice not to reinvent the wheel if this is already possible.