Improve NameReference Test cases

- Add more NameReference Namespace tests
- Address issue when mixing empty/no namespace and default namespace.
- Address ClusterRoleBinding subjects field pointing at multiple namespaces.

pkg/resmaptest/rmbuilder.go

@@ -62,6 +62,14 @@ func (rm *rmBuilder) AddWithNs(ns string, m map[string]interface{}) *rmBuilder {
 	return rm
 }
 
+func (rm *rmBuilder) AddWithNsAndName(ns string, n string, m map[string]interface{}) *rmBuilder {
+	err := rm.m.Append(rm.rf.FromMapWithNamespaceAndName(ns, n, m))
+	if err != nil {
+		rm.t.Fatalf("test setup failure: %v", err)
+	}
+	return rm
+}
+
 func (rm *rmBuilder) ReplaceResource(m map[string]interface{}) *rmBuilder {
 	r := rm.rf.FromMap(m)
 	_, err := rm.m.Replace(r)

pkg/resource/factory.go

@@ -43,6 +43,11 @@ func (rf *Factory) FromMapWithNamespace(n string, m map[string]interface{}) *Res
 	return rf.makeOne(rf.kf.FromMap(m), nil).setOriginalNs(n)
 }
 
+// FromMapWithNamespaceAndName returns a new instance with the given "original" namespace.
+func (rf *Factory) FromMapWithNamespaceAndName(ns string, n string, m map[string]interface{}) *Resource {
+	return rf.makeOne(rf.kf.FromMap(m), nil).setOriginalNs(ns).setOriginalName(n)
+}
+
 // FromMapAndOption returns a new instance of Resource with given options.
 func (rf *Factory) FromMapAndOption(
 	m map[string]interface{}, args *types.GeneratorArgs, option *types.GeneratorOptions) *Resource {

pkg/resource/resource.go

@@ -127,7 +127,7 @@ func (r *Resource) GetOutermostNameSuffix() string {
 }
 
 func (r *Resource) InSameFuzzyNamespace(o *Resource) bool {
-	return r.GetNamespace() == o.GetNamespace() &&
+	return r.CurId().IsNsEquals(o.CurId()) &&
 		r.GetOutermostNamePrefix() == o.GetOutermostNamePrefix() &&
 		r.GetOutermostNameSuffix() == o.GetOutermostNameSuffix()
 }

pkg/transformers/config/defaultconfig/namereference.go

@@ -299,10 +299,10 @@ nameReference:
 - kind: ServiceAccount
   version: v1
   fieldSpecs:
-  - path: subjects/name
+  - path: subjects
     kind: RoleBinding
     group: rbac.authorization.k8s.io
-  - path: subjects/name
+  - path: subjects
     kind: ClusterRoleBinding
     group: rbac.authorization.k8s.io
   - path: spec/serviceAccountName

pkg/transformers/namereference.go

@@ -106,6 +106,77 @@ func (o *nameReferenceTransformer) Transform(m resmap.ResMap) error {
 	return nil
 }
 
+// utility function to replace a simple string by the new name
+func (o *nameReferenceTransformer) mapSimpleNameField(
+	oldName string,
+	referrer *resource.Resource,
+	target gvk.Gvk,
+	referralCandidates resmap.ResMap,
+	referralCandidateSubset []*resource.Resource) (interface{}, error) {
+
+	for _, res := range referralCandidateSubset {
+		id := res.OrgId()
+		if id.IsSelected(&target) && res.GetOriginalName() == oldName {
+			matches := referralCandidates.GetMatchingResourcesByOriginalId(id.Equals)
+			// If there's more than one match, there's no way
+			// to know which one to pick, so emit error.
+			if len(matches) > 1 {
+				return nil, fmt.Errorf(
+					"string case - multiple matches for %s:\n  %v",
+					id, getIds(matches))
+			}
+			// In the resource, note that it is referenced
+			// by the referrer.
+			res.AppendRefBy(referrer.CurId())
+			// Return transformed name of the object,
+			// complete with prefixes, hashes, etc.
+			return res.GetName(), nil
+		}
+	}
+
+	return oldName, nil
+}
+
+// utility function to replace name field within a map[string]interface{}
+// and leverage the namespace field.
+func (o *nameReferenceTransformer) mapNameAndNsStruct(
+	inMap map[string]interface{},
+	referrer *resource.Resource,
+	target gvk.Gvk,
+	referralCandidates resmap.ResMap) (interface{}, error) {
+
+	// Example:
+	if _, ok := inMap["name"]; !ok {
+		return nil, fmt.Errorf(
+			"%#v is expected to contain a name field", inMap)
+	}
+	oldName, ok := inMap["name"].(string)
+	if !ok {
+		return nil, fmt.Errorf(
+			"%#v is expected to contain a name field of type string", oldName)
+	}
+
+	subset := referralCandidates.Resources()
+	if namespacevalue, ok := inMap["namespace"]; ok {
+		namespace := namespacevalue.(string)
+		bynamespace := referralCandidates.GroupedByNamespace()
+		if _, ok := bynamespace[namespace]; !ok {
+			return inMap, nil
+		}
+		subset = bynamespace[namespace]
+	}
+
+	newname, err := o.mapSimpleNameField(oldName, referrer, target,
+		referralCandidates, subset)
+	if err != nil {
+		return nil, err
+	}
+
+	inMap["name"] = newname
+	return inMap, nil
+
+}
+
 func (o *nameReferenceTransformer) getNewNameFunc(
 	referrer *resource.Resource,
 	target gvk.Gvk,
@@ -114,52 +185,35 @@ func (o *nameReferenceTransformer) getNewNameFunc(
 		switch in.(type) {
 		case string:
 			oldName, _ := in.(string)
-			for _, res := range referralCandidates.Resources() {
+			return o.mapSimpleNameField(oldName, referrer, target,
-				id := res.OrgId()
+				referralCandidates, referralCandidates.Resources())
-				if id.IsSelected(&target) && res.GetOriginalName() == oldName {
-					matches := referralCandidates.GetMatchingResourcesByOriginalId(id.Equals)
-					// If there's more than one match, there's no way
-					// to know which one to pick, so emit error.
-					if len(matches) > 1 {
-						return nil, fmt.Errorf(
-							"string case - multiple matches for %s:\n  %v",
-							id, getIds(matches))
-					}
-					// In the resource, note that it is referenced
-					// by the referrer.
-					res.AppendRefBy(referrer.CurId())
-					// Return transformed name of the object,
-					// complete with prefixes, hashes, etc.
-					return res.GetName(), nil
-				}
-			}
-			return in, nil
 		case []interface{}:
 			l, _ := in.([]interface{})
-			var names []string
+			for idx, item := range l {
-			for _, item := range l {
+				switch item.(type) {
-				name, ok := item.(string)
+				case string:
-				if !ok {
+					// Kind: Role/ClusterRole
+					// FieldSpec is rules.resourceNames
+					oldName, _ := item.(string)
+					newName, err := o.mapSimpleNameField(oldName, referrer, target,
+						referralCandidates, referralCandidates.Resources())
+					if err != nil {
+						return nil, err
+					}
+					l[idx] = newName
+				case map[string]interface{}:
+					// Kind: RoleBinding/ClusterRoleBinding
+					// FieldSpec is subjects
+					oldMap, _ := item.(map[string]interface{})
+					newMap, err := o.mapNameAndNsStruct(oldMap, referrer, target,
+						referralCandidates)
+					if err != nil {
+						return nil, err
+					}
+					l[idx] = newMap
+				default:
 					return nil, fmt.Errorf(
-						"%#v is expected to be %T", item, name)
+						"%#v is expected to be either a []string or a []map[string]interface{}", in)
-				}
-				names = append(names, name)
-			}
-			for _, res := range referralCandidates.Resources() {
-				indexes := indexOf(res.GetOriginalName(), names)
-				id := res.OrgId()
-				if id.IsSelected(&target) && len(indexes) > 0 {
-					matches := referralCandidates.GetMatchingResourcesByOriginalId(id.Equals)
-					if len(matches) > 1 {
-						return nil, fmt.Errorf(
-							"slice case - multiple matches for %s:\n %v",
-							id, getIds(matches))
-					}
-					for _, index := range indexes {
-						l[index] = res.GetName()
-					}
-					res.AppendRefBy(referrer.CurId())
-					return l, nil
 				}
 			}
 			return in, nil

pkg/transformers/namereference_test.go

@@ -8,6 +8,8 @@ import (
 	"testing"
 
 	"sigs.k8s.io/kustomize/v3/k8sdeps/kunstruct"
+	"sigs.k8s.io/kustomize/v3/pkg/gvk"
+	"sigs.k8s.io/kustomize/v3/pkg/resid"
 	"sigs.k8s.io/kustomize/v3/pkg/resmap"
 	"sigs.k8s.io/kustomize/v3/pkg/resmaptest"
 	"sigs.k8s.io/kustomize/v3/pkg/resource"
@@ -466,6 +468,7 @@ func TestNameReferenceHappyRun(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
+
 	if err = expected.ErrorIfNotEqualLists(m); err != nil {
 		t.Fatalf("actual doesn't match expected: %v", err)
 	}
@@ -497,7 +500,7 @@ func TestNameReferenceUnhappyRun(t *testing.T) {
 						},
 					},
 				}).ResMap(),
-			expectedErr: "is expected to be string"},
+			expectedErr: "is expected to be"},
 		{
 			resMap: resmaptest_test.NewRmBuilder(t, rf).Add(
 				map[string]interface{}{
@@ -517,7 +520,7 @@ func TestNameReferenceUnhappyRun(t *testing.T) {
 						},
 					},
 				}).ResMap(),
-			expectedErr: "is expected to be either a string or a []interface{}"},
+			expectedErr: "is expected to be"},
 	}
 
 	nrt := NewNameReferenceTransformer(defaultTransformerConfig.NameReference)
@@ -590,3 +593,303 @@ func TestNameReferencePersistentVolumeHappyRun(t *testing.T) {
 		t.Fatalf("actual doesn't match expected: %v", err)
 	}
 }
+
+// utility map to create a deployment object
+// with (metadatanamespace, metadataname) as key
+// and pointing to "refname" secret and configmap
+func deploymentMap(metadatanamespace string, metadataname string,
+	configmapref string, secretref string) map[string]interface{} {
+	deployment := map[string]interface{}{
+		"group":      "apps",
+		"apiVersion": "v1",
+		"kind":       "Deployment",
+		"metadata": map[string]interface{}{
+			"name": metadataname,
+		},
+		"spec": map[string]interface{}{
+			"template": map[string]interface{}{
+				"spec": map[string]interface{}{
+					"containers": []interface{}{
+						map[string]interface{}{
+							"name":  "nginx",
+							"image": "nginx:1.7.9",
+							"env": []interface{}{
+								map[string]interface{}{
+									"name": "CM_FOO",
+									"valueFrom": map[string]interface{}{
+										"configMapKeyRef": map[string]interface{}{
+											"name": configmapref,
+											"key":  "somekey",
+										},
+									},
+								},
+								map[string]interface{}{
+									"name": "SECRET_FOO",
+									"valueFrom": map[string]interface{}{
+										"secretKeyRef": map[string]interface{}{
+											"name": secretref,
+											"key":  "somekey",
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	if metadatanamespace != "" {
+		metadata := deployment["metadata"].(map[string]interface{})
+		metadata["namespace"] = metadatanamespace
+	}
+	return deployment
+}
+
+// TestNameReferenceNamespace creates configmap, secret, deployment
+// serviceAccount and clusterRoleBinding object with the same original
+// names (uniquename) in different namespaces and with different current Id.
+func TestNameReferenceyNamespace(t *testing.T) {
+	defaultNs := "default"
+	ns1 := "ns1"
+	ns2 := "ns2"
+
+	orgname := "uniquename"
+	prefixedname := "prefix-uniquename"
+	suffixedname := "uniquename-suffix"
+	modifiedname := "modifiedname"
+
+	rf := resource.NewFactory(
+		kunstruct.NewKunstructuredFactoryImpl())
+	m := resmaptest_test.NewRmBuilder(t, rf).
+		// Add ConfigMap with the same org name in noNs, "ns1" and "ns2" namespaces
+		AddWithName(orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ConfigMap",
+			"metadata": map[string]interface{}{
+				"name": modifiedname,
+			}}).
+		AddWithNsAndName(ns1, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ConfigMap",
+			"metadata": map[string]interface{}{
+				"name":      prefixedname,
+				"namespace": ns1,
+			}}).
+		AddWithNsAndName(ns2, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ConfigMap",
+			"metadata": map[string]interface{}{
+				"name":      suffixedname,
+				"namespace": ns2,
+			}}).
+		// Add Secret with the same org name in noNs, "ns1" and "ns2" namespaces
+		AddWithNsAndName(defaultNs, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "Secret",
+			"metadata": map[string]interface{}{
+				"name":      modifiedname,
+				"namespace": defaultNs,
+			}}).
+		AddWithNsAndName(ns1, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "Secret",
+			"metadata": map[string]interface{}{
+				"name":      prefixedname,
+				"namespace": ns1,
+			}}).
+		AddWithNsAndName(ns2, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "Secret",
+			"metadata": map[string]interface{}{
+				"name":      suffixedname,
+				"namespace": ns2,
+			}}).
+		// Add Deployment with the same org name in noNs, "ns1" and "ns2" namespaces
+		AddWithNsAndName(defaultNs, orgname, deploymentMap(defaultNs, modifiedname, modifiedname, modifiedname)).
+		AddWithNsAndName(ns1, orgname, deploymentMap(ns1, prefixedname, orgname, orgname)).
+		AddWithNsAndName(ns2, orgname, deploymentMap(ns2, suffixedname, orgname, orgname)).
+		// Add ServiceAccount with the same org name in noNs, "ns1" and "ns2" namespaces
+		AddWithName(orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ServiceAccount",
+			"metadata": map[string]interface{}{
+				"name": modifiedname,
+			}}).
+		AddWithNsAndName(ns1, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ServiceAccount",
+			"metadata": map[string]interface{}{
+				"name":      prefixedname,
+				"namespace": ns1,
+			}}).
+		AddWithNsAndName(ns2, orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ServiceAccount",
+			"metadata": map[string]interface{}{
+				"name":      suffixedname,
+				"namespace": ns2,
+			}}).
+		// Add a PersisitentVolume to have a clusterwide resources
+		AddWithName(orgname, map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "PersistentVolume",
+			"metadata": map[string]interface{}{
+				"name": modifiedname,
+			}}).
+		AddWithName(orgname, map[string]interface{}{
+			"apiVersion": "rbac.authorization.k8s.io/v1",
+			"kind":       "ClusterRole",
+			"metadata": map[string]interface{}{
+				"name": modifiedname,
+			},
+			"rules": []interface{}{
+				map[string]interface{}{
+					"resources": []interface{}{
+						"persistentvolumes",
+					},
+					"resourceNames": []interface{}{
+						orgname,
+					},
+				},
+			}}).
+		AddWithName(orgname, map[string]interface{}{
+			"apiVersion": "rbac.authorization.k8s.io/v1",
+			"kind":       "ClusterRoleBinding",
+			"metadata": map[string]interface{}{
+				"name": modifiedname,
+			},
+			"roleRef": map[string]interface{}{
+				"apiVersion": "rbac.authorization.k8s.io/v1",
+				"kind":       "ClusterRole",
+				"name":       orgname,
+			},
+			"subjects": []interface{}{
+				map[string]interface{}{
+					"kind":      "ServiceAccount",
+					"name":      orgname,
+					"namespace": defaultNs,
+				},
+				map[string]interface{}{
+					"kind":      "ServiceAccount",
+					"name":      orgname,
+					"namespace": ns1,
+				},
+				map[string]interface{}{
+					"kind":      "ServiceAccount",
+					"name":      orgname,
+					"namespace": ns2,
+				},
+			}}).ResMap()
+
+	expected := resmaptest_test.NewSeededRmBuilder(t, rf, m.ShallowCopy()).
+		ReplaceResource(deploymentMap(defaultNs, modifiedname, modifiedname, modifiedname)).
+		ReplaceResource(deploymentMap(ns1, prefixedname, prefixedname, prefixedname)).
+		ReplaceResource(deploymentMap(ns2, suffixedname, suffixedname, suffixedname)).
+		ReplaceResource(
+			map[string]interface{}{
+				"apiVersion": "rbac.authorization.k8s.io/v1",
+				"kind":       "ClusterRole",
+				"metadata": map[string]interface{}{
+					"name": modifiedname,
+				},
+				"rules": []interface{}{
+					map[string]interface{}{
+						"resources": []interface{}{
+							"persistentvolumes",
+						},
+						"resourceNames": []interface{}{
+							modifiedname,
+						},
+					},
+				}}).
+		ReplaceResource(
+			map[string]interface{}{
+				"apiVersion": "rbac.authorization.k8s.io/v1",
+				"kind":       "ClusterRoleBinding",
+				"metadata": map[string]interface{}{
+					"name": modifiedname,
+				},
+				"roleRef": map[string]interface{}{
+					"apiVersion": "rbac.authorization.k8s.io/v1",
+					"kind":       "ClusterRole",
+					"name":       modifiedname,
+				},
+				// The following tests required a change in
+				// getNameFunc implementation in order to leverage
+				// the namespace field.
+				"subjects": []interface{}{
+					map[string]interface{}{
+						"kind":      "ServiceAccount",
+						"name":      modifiedname,
+						"namespace": defaultNs,
+					},
+					map[string]interface{}{
+						"kind":      "ServiceAccount",
+						"name":      prefixedname,
+						"namespace": ns1,
+					},
+					map[string]interface{}{
+						"kind":      "ServiceAccount",
+						"name":      suffixedname,
+						"namespace": ns2,
+					},
+				},
+			}).ResMap()
+
+	clusterRoleId := resid.NewResId(
+		gvk.Gvk{Group: "rbac.authorization.k8s.io", Version: "v1", Kind: "ClusterRole"}, modifiedname)
+	clusterRoleBindingId := resid.NewResId(
+		gvk.Gvk{Group: "rbac.authorization.k8s.io", Version: "v1", Kind: "ClusterRoleBinding"}, modifiedname)
+	clusterRole, _ := expected.GetByCurrentId(clusterRoleId)
+	clusterRole.AppendRefBy(clusterRoleBindingId)
+
+	nrt := NewNameReferenceTransformer(defaultTransformerConfig.NameReference)
+	err := nrt.Transform(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if err = expected.ErrorIfNotEqualLists(m); err != nil {
+		t.Fatalf("actual doesn't match expected: %v", err)
+	}
+}
+
+// TestNameReferenceNamespace creates configmap, secret, deployment
+// It validates the change done is IsSameFuzzyNamespace which
+// uses the IsNsEquals method instead of the simple == operator.
+func TestNameReferenceCandidateSelection(t *testing.T) {
+	rf := resource.NewFactory(
+		kunstruct.NewKunstructuredFactoryImpl())
+	m := resmaptest_test.NewRmBuilder(t, rf).
+		AddWithName("cm1", map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "ConfigMap",
+			"metadata": map[string]interface{}{
+				"name": "p1-cm1-hash",
+			}}).
+		AddWithNsAndName("default", "secret1", map[string]interface{}{
+			"apiVersion": "v1",
+			"kind":       "Secret",
+			"metadata": map[string]interface{}{
+				"name":      "p1-secret1-hash",
+				"namespace": "default",
+			}}).
+		AddWithName("deploy1", deploymentMap("", "p1-deploy1", "cm1", "secret1")).
+		ResMap()
+
+	expected := resmaptest_test.NewSeededRmBuilder(t, rf, m.ShallowCopy()).
+		ReplaceResource(deploymentMap("", "p1-deploy1", "p1-cm1-hash", "p1-secret1-hash")).
+		ResMap()
+
+	nrt := NewNameReferenceTransformer(defaultTransformerConfig.NameReference)
+	err := nrt.Transform(m)
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if err = expected.ErrorIfNotEqualLists(m); err != nil {
+		t.Fatalf("actual doesn't match expected: %v", err)
+	}
+}