Allow replicas to find modified names.

Also allows to test for modified resmaps instead of directly loading
them.

plugin/builtin/ReplicaCountTransformer.go

@@ -34,8 +34,15 @@ func (p *ReplicaCountTransformerPlugin) Config(
 }
 
 func (p *ReplicaCountTransformerPlugin) Transform(m resmap.ResMap) error {
+
+	found := false
 	for i, replicaSpec := range p.FieldSpecs {
-		for _, res := range m.GetMatchingResourcesByOriginalId(p.createMatcher(i)) {
+		matcher := p.createMatcher(i)
+		matchOriginal := m.GetMatchingResourcesByOriginalId(matcher)
+		matchCurrent := m.GetMatchingResourcesByCurrentId(matcher)
+
+		for _, res := range append(matchOriginal, matchCurrent...) {
+			found = true
 			err := transformers.MutateField(
 				res.Map(), replicaSpec.PathSlice(),
 				replicaSpec.CreateIfNotPresent, p.addReplicas)
@@ -45,6 +52,15 @@ func (p *ReplicaCountTransformerPlugin) Transform(m resmap.ResMap) error {
 		}
 	}
 
+	if !found {
+		gvks := make([]string, len(p.FieldSpecs))
+		for i, replicaSpec := range p.FieldSpecs {
+			gvks[i] = replicaSpec.Gvk.String()
+		}
+		return fmt.Errorf("Resource with name %s does not match a config with the following GVK %v",
+			p.Replica.Name, gvks)
+	}
+
 	return nil
 }