Pretend to delete, no error.

google/resource_app_engine_application.go

@@ -68,10 +68,6 @@ func resourceAppEngineApplication() *schema.Resource {
 				MaxItems: 1,
 				Elem:     appEngineApplicationFeatureSettingsResource(),
 			},
-			"ack_delete_noop": &schema.Schema{
-				Type:     schema.TypeBool,
-				Optional: true,
-			},
 			"name": &schema.Schema{
 				Type:     schema.TypeString,
 				Computed: true,
@@ -224,10 +220,7 @@ func resourceAppEngineApplicationUpdate(d *schema.ResourceData, meta interface{}
 }
 
 func resourceAppEngineApplicationDelete(d *schema.ResourceData, meta interface{}) error {
-	// only delete app engine applications if the user has acknowledged it does nothing
-	if !d.Get("ack_delete_noop").(bool) {
-		return fmt.Errorf("App Engine applications cannot be destroyed once created. The project must be deleted to delete the application. To acknowledge this limitation and let Terraform think it deleted your application--even though it won't--set the `ack_delete_noop` field to true, and this error will go away.")
-	}
+	log.Println("[DEBUG] App Engine applications cannot be destroyed once created. The project must be deleted to delete the application.")
 	return nil
 }
 

google/resource_app_engine_application_test.go

@@ -2,7 +2,6 @@ package google
 
 import (
 	"fmt"
-	"regexp"
 	"testing"
 
 	"github.com/hashicorp/terraform/helper/acctest"
@@ -29,44 +28,17 @@ func TestAccAppEngineApplication_basic(t *testing.T) {
 				),
 			},
 			{
-				ResourceName:            "google_app_engine_application.acceptance",
-				ImportState:             true,
-				ImportStateVerify:       true,
-				ImportStateVerifyIgnore: []string{"ack_delete_noop"},
+				ResourceName:      "google_app_engine_application.acceptance",
+				ImportState:       true,
+				ImportStateVerify: true,
 			},
 			{
 				Config: testAccAppEngineApplication_update(pid, org),
 			},
 			{
-				ResourceName:            "google_app_engine_application.acceptance",
-				ImportState:             true,
-				ImportStateVerify:       true,
-				ImportStateVerifyIgnore: []string{"ack_delete_noop"},
-			},
-		},
-	})
-}
-
-func TestAccAppEngineApplication_delete(t *testing.T) {
-	t.Parallel()
-
-	org := getTestOrgFromEnv(t)
-	pid := acctest.RandomWithPrefix("tf-test")
-	resource.Test(t, resource.TestCase{
-		PreCheck:  func() { testAccPreCheck(t) },
-		Providers: testAccProviders,
-		Steps: []resource.TestStep{
-			{
-				Config: testAccAppEngineApplication_noDelete(pid, org),
-			},
-			{
-				Config:      testAccAppEngineApplication_noDelete(pid, org),
-				Destroy:     true,
-				ExpectError: regexp.MustCompile("set the `ack_delete_noop` field to true"),
-			},
-			{
-				// revert back to the same config, but with delete set, so the project can get deleted
-				Config: testAccAppEngineApplication_basic(pid, org),
+				ResourceName:      "google_app_engine_application.acceptance",
+				ImportState:       true,
+				ImportStateVerify: true,
 			},
 		},
 	})
@@ -85,7 +57,6 @@ resource "google_app_engine_application" "acceptance" {
   auth_domain     = "hashicorptest.com"
   location_id     = "us-central"
   serving_status  = "SERVING"
-  ack_delete_noop = true
 }`, pid, pid, org)
 }
 
@@ -102,22 +73,5 @@ resource "google_app_engine_application" "acceptance" {
   auth_domain     = "tf-test.club"
   location_id     = "us-central"
   serving_status  = "USER_DISABLED"
-  ack_delete_noop = true
-}`, pid, pid, org)
-}
-
-func testAccAppEngineApplication_noDelete(pid, org string) string {
-	return fmt.Sprintf(`
-resource "google_project" "acceptance" {
-  project_id = "%s"
-  name       = "%s"
-  org_id     = "%s"
-}
-
-resource "google_app_engine_application" "acceptance" {
-  project         = "${google_project.acceptance.project_id}"
-  auth_domain     = "hashicorptest.com"
-  location_id     = "us-central"
-  serving_status  = "SERVING"
 }`, pid, pid, org)
 }

website/docs/r/app_engine_application.html.markdown

@@ -11,9 +11,9 @@ description: |-
 Allows creation and management of an App Engine application.
 
 ~> App Engine applications cannot be deleted once they're created; you have to delete the
-   entire project to delete the application. Terraform will force you to set the `ack_delete_noop`
-   field to `true` to acknowledge this limitation before you can successfully delete an App Engine
-   application. There's no harm in leaving the `ack_delete_noop` field set to true at all times.
+   entire project to delete the application. Terraform will report the application has been
+   successfully deleted; this is a limitation of Terraform, and will go away in the future.
+   Terraform is not able to delete App Engine applications.
 
 ## Example Usage
 
@@ -27,7 +27,6 @@ resource "google_project" "my_project" {
 resource "google_app_engine_application" "app" {
   project         = "${google_project.my_project.project_id}"
   location_id     = "us-central'
-  ack_delete_noop = true
 }
 ```
 
@@ -38,10 +37,6 @@ The following arguments are supported:
 * `location_id` - (Required) The [location](https://cloud.google.com/appengine/docs/locations)
    to serve the app from.
 
-* `ack_delete_noop` - (Optional) Set to true to allow Terraform to "delete" your application without error.
-   Has no bearing except to indicate that you're aware that when Terraform says it deletes an application,
-   the application has not actually been deleted. To delete an application, the entire project must be deleted.
-
 * `auth_domain` - (Optional) The domain to authenticate users with when using App Engine's User API.
 
 * `serving_status` - (Optional) The serving status of the app. Note that this can't be updated at the moment.