func graphDotAddRoot(buf *bytes.Buffer, n *depgraph.Noun) {
buf.WriteString(fmt.Sprintf("\t\"%s\" [shape=circle];\n", "root"))
for _, e := range n.Edges() {
target := e.Tail()
buf.WriteString(fmt.Sprintf(
"\t\"%s\" -> \"%s\";\n",
"root",
target))
}
}
func graphWriteEdges(
buf *bytes.Buffer, n *depgraph.Noun, opts *GraphDotOpts) {
tab := strings.Repeat("\t", opts.depth+1)
uniqueName := graphUniqueName(n, opts)
var ltail string
if _, ok := n.Meta.(*GraphNodeModule); ok && graphExpand(opts) {
ltail = "cluster_" + uniqueName
uniqueName = uniqueName + "_hidden"
}
for _, e := range n.Edges() {
target := e.Tail()
targetN := target.(*depgraph.Noun)
uniqueTarget := graphUniqueName(targetN, opts)
var lhead string
if _, ok := targetN.Meta.(*GraphNodeModule); ok && graphExpand(opts) {
lhead = "cluster_" + uniqueTarget
uniqueTarget = uniqueTarget + "_hidden"
}
var attrs string
if lhead != "" || ltail != "" {
var attrList []string
if lhead != "" {
attrList = append(attrList, fmt.Sprintf(
"lhead=\"%s\"", lhead))
}
if ltail != "" {
attrList = append(attrList, fmt.Sprintf(
"ltail=\"%s\"", ltail))
}
attrs = fmt.Sprintf(" [%s]", strings.Join(attrList, ","))
}
buf.WriteString(fmt.Sprintf(
"%s\"%s\" -> \"%s\"%s;\n",
tab,
uniqueName,
uniqueTarget,
attrs))
}
}