func (d Dag) MakeDotGraph(filename string) {
var file *os.File
var fileinfo *os.FileInfo
var e os.Error
var sb *stringbuffer.StringBuffer
fileinfo, e = os.Stat(filename)
if e == nil {
if fileinfo.IsRegular() {
e = os.Remove(fileinfo.Name)
if e != nil {
log.Fatalf("[ERROR] failed to remove: %s\n", filename)
}
}
}
sb = stringbuffer.NewSize(500)
file, e = os.OpenFile(filename, os.O_WRONLY|os.O_CREATE, 0644)
if e != nil {
log.Fatalf("[ERROR] %s\n", e)
}
sb.Add("digraph depgraph {\n\trankdir=LR;\n")
for _, v := range d {
v.DotGraph(sb)
}
sb.Add("}\n")
file.WriteString(sb.String())
file.Close()
}
