resources: Add NewNamedResource helper

This makes the common pattern of NewResource, SetName, easier. It also
makes it less likely for you to forget to use SetName.

examples/lib/libmgmt1.go

@@ -57,15 +57,13 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 		return nil, fmt.Errorf("libmgmt: MyGAPI is not initialized")
 	}
 
-	// TODO: this method of instantiation is deprecated, use: NewResource
-	n1 := &resources.NoopRes{
-		BaseRes: resources.BaseRes{
-			Name:       "noop1",
-			Kind:       "noop",
-			MetaParams: resources.DefaultMetaParams,
-		},
+	n1, err := resources.NewNamedResource("noop", "noop1")
+	if err != nil {
+		return nil, err
 	}
 
+	// NOTE: This is considered the legacy method to build graphs. Avoid
+	// importing the legacy `yamlgraph` lib if possible for custom graphs.
 	// we can still build a graph via the yaml method
 	gc := &yamlgraph.GraphConfig{
 		Graph: obj.Name,
@@ -74,7 +72,7 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 			Exec:  []*resources.ExecRes{},
 			File:  []*resources.FileRes{},
 			Msg:   []*resources.MsgRes{},
-			Noop:  []*resources.NoopRes{n1},
+			Noop:  []*resources.NoopRes{n1.(*resources.NoopRes)},
 			Pkg:   []*resources.PkgRes{},
 			Svc:   []*resources.SvcRes{},
 			Timer: []*resources.TimerRes{},

examples/lib/libmgmt2.go

@@ -65,11 +65,10 @@ func (obj *MyGAPI) Graph() (*pgraph.Graph, error) {
 	}
 	var vertex pgraph.Vertex
 	for i := uint(0); i < obj.Count; i++ {
-		n, err := resources.NewResource("noop")
+		n, err := resources.NewNamedResource("noop", fmt.Sprintf("noop%d", i))
 		if err != nil {
 			return nil, err
 		}
-		n.SetName(fmt.Sprintf("noop%d", i))
 		g.AddVertex(n)
 		if i > 0 {
 			g.AddEdge(vertex, n, &resources.Edge{Name: fmt.Sprintf("e%d", i)})