Support allowNameChange and allowKindChange for patches

docs/data-sources/overlay.md

@@ -325,6 +325,8 @@ Define [Kustomize patches](https://kubectl.docs.kubernetes.io/references/kustomi
 - `path` path to a patch file on disk
 - `patch` patch defined as an inline string
 - `target` patch target, specified by: `group`, `version`, `kind`, `name`, `namespace`, `label_selector`, `annotation_selector`
+- `options` - set `allow_kind_change` and/or `allow_name_change` to `true` to allow `kind` or `metadata.name` to be changed by the patch
+  (only relevant for strategic merge patches, JSON patches ignore this setting)
 
 #### Example
 
@@ -341,6 +343,21 @@ data "kustomization_overlay" "example" {
     }
   }
 
+  patches {
+    target = {
+      kind = "Namespace"
+      name = "test-ns"
+    }
+    patch = <<-EOF
+      kind: Namespace
+      metadata:
+        name: new-ns
+    EOF
+    options {
+      allow_name_change = true
+    }
+  }
+
   patches {
     patch = <<-EOF
       - op: replace

kustomize/data_source_kustomization_overlay.go

@@ -52,6 +52,28 @@ func getGeneratorOptions(o map[string]interface{}) *types.GeneratorOptions {
 	return g
 }
 
+func getPatchOptionsSchema() *schema.Resource {
+	return &schema.Resource{
+		Schema: map[string]*schema.Schema{
+			"allow_kind_change": {
+				Type:     schema.TypeBool,
+				Optional: true,
+			},
+			"allow_name_change": {
+				Type:     schema.TypeBool,
+				Optional: true,
+			},
+		},
+	}
+}
+
+func getPatchOptions(o map[string]interface{}) map[string]bool {
+	po := make(map[string]bool)
+	po["allowKindChange"] = o["allow_kind_change"].(bool)
+	po["allowNameChange"] = o["allow_name_change"].(bool)
+	return po
+}
+
 func dataSourceKustomizationOverlay() *schema.Resource {
 	return &schema.Resource{
 		Read: kustomizationOverlay,
@@ -186,6 +208,12 @@ func dataSourceKustomizationOverlay() *schema.Resource {
 				Optional: true,
 				Elem: &schema.Resource{
 					Schema: map[string]*schema.Schema{
+						"options": {
+							Type:     schema.TypeList,
+							MaxItems: 1,
+							Optional: true,
+							Elem:     getPatchOptionsSchema(),
+						},
 						"path": {
 							Type:     schema.TypeString,
 							Optional: true,
@@ -551,6 +579,10 @@ func getKustomization(d *schema.ResourceData) (k types.Kustomization) {
 				kp.Target.AnnotationSelector = t["annotation_selector"]
 				kp.Target.LabelSelector = t["label_selector"]
 			}
+			o := p["options"].([]interface{})
+			if len(o) == 1 && o[0] != nil {
+				kp.Options = getPatchOptions(o[0].(map[string]interface{}))
+			}
 
 			k.Patches = append(k.Patches, kp)
 		}

kustomize/data_source_kustomization_overlay_test.go

@@ -907,3 +907,95 @@ output "check_s" {
 }
 `, modulePath, modulePath)
 }
+
+//
+//
+// Test patch options attr
+func TestDataSourceKustomizationOverlay_patchOptionsNoop(t *testing.T) {
+
+	resource.Test(t, resource.TestCase{
+		IsUnitTest: true,
+		Providers:  testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testKustomizationPatchOptionsConfigNoop(),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					resource.TestCheckOutput("check_ns", `{"apiVersion":"v1","kind":"Namespace","metadata":{"name":"test-basic"}}`),
+				),
+			},
+		},
+	})
+}
+
+func testKustomizationPatchOptionsConfigNoop() string {
+	return `
+data "kustomization_overlay" "test" {
+	resources = [
+		"test_kustomizations/basic/initial",
+	]
+	patches {
+		target = {
+			kind = "Namespace"
+			name = "test-basic"
+		}
+		patch = <<-EOF
+			kind: Namespace
+			metadata:
+			  name: new-basic
+		EOF
+		options {
+			allow_name_change = false
+		}
+	}
+}
+
+output "check_ns" {
+	value = data.kustomization_overlay.test.manifests["_/Namespace/_/test-basic"]
+}
+`
+}
+
+// Test patch options attr(
+func TestDataSourceKustomizationOverlay_patchOptions(t *testing.T) {
+
+	resource.Test(t, resource.TestCase{
+		IsUnitTest: true,
+		Providers:  testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testKustomizationPatchOptionsConfig(),
+				Check: resource.ComposeAggregateTestCheckFunc(
+					resource.TestCheckOutput("check_ns", `{"apiVersion":"v1","kind":"Namespace","metadata":{"name":"new-basic"}}`),
+				),
+			},
+		},
+	})
+}
+
+func testKustomizationPatchOptionsConfig() string {
+	return `
+data "kustomization_overlay" "test" {
+	resources = [
+		"test_kustomizations/basic/initial",
+	]
+	patches {
+		target = {
+			kind = "Namespace"
+			name = "test-basic"
+		}
+		patch = <<-EOF
+			kind: Namespace
+			metadata:
+			  name: new-basic
+		EOF
+		options {
+			allow_name_change = true
+		}
+	}
+}
+
+output "check_ns" {
+	value = data.kustomization_overlay.test.manifests["_/Namespace/_/new-basic"]
+}
+`
+}