func writeLogfile(g *graph.Graph, round int) error {
logfile := filepath.Join(*outputDir, fmt.Sprintf("%04d.def", round))
f, err := os.Create(logfile)
if err != nil {
return fmt.Errorf("Error creating logfile: %v", err)
}
def := g.GraphDef()
data, err := encoding.Marshal(def)
if err != nil {
return fmt.Errorf("Error marshalling graph def: %v", err)
}
_, err = f.Write(data)
return err
}
