Promote public_access_prevention field on google_storage_bucket resource to GA, add to documentation

.changelog/6683.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+storage: Promoted `public_access_prevention` field on `google_storage_bucket` resource to GA
+```

google/resource_storage_bucket.go

@@ -386,6 +386,12 @@ func resourceStorageBucket() *schema.Resource {
 				},
 				Description: `The bucket's custom location configuration, which specifies the individual regions that comprise a dual-region bucket. If the bucket is designated a single or multi-region, the parameters are empty.`,
 			},
+			"public_access_prevention": {
+				Type:        schema.TypeString,
+				Optional:    true,
+				Computed:    true,
+				Description: `Prevents public access to a bucket.`,
+			},
 		},
 		UseJSONNumber: true,
 	}
@@ -650,7 +656,7 @@ func resourceStorageBucketUpdate(d *schema.ResourceData, meta interface{}) error
 		}
 	}
 
-	if d.HasChange("uniform_bucket_level_access") {
+	if d.HasChange("uniform_bucket_level_access") || d.HasChange("public_access_prevention") {
 		sb.IamConfiguration = expandIamConfiguration(d)
 	}
 
@@ -1142,6 +1148,10 @@ func expandIamConfiguration(d *schema.ResourceData) *storage.BucketIamConfigurat
 		},
 	}
 
+	if v, ok := d.GetOk("public_access_prevention"); ok {
+		cfg.PublicAccessPrevention = v.(string)
+	}
+
 	return cfg
 }
 
@@ -1506,6 +1516,12 @@ func setStorageBucket(d *schema.ResourceData, config *Config, res *storage.Bucke
 		}
 	}
 
+	if res.IamConfiguration != nil && res.IamConfiguration.PublicAccessPrevention != "" {
+		if err := d.Set("public_access_prevention", res.IamConfiguration.PublicAccessPrevention); err != nil {
+			return fmt.Errorf("Error setting public_access_prevention: %s", err)
+		}
+	}
+
 	if res.Billing == nil {
 		if err := d.Set("requester_pays", nil); err != nil {
 			return fmt.Errorf("Error setting requester_pays: %s", err)

google/resource_storage_bucket_test.go

@@ -866,6 +866,28 @@ func TestAccStorageBucket_encryption(t *testing.T) {
 	})
 }
 
+func TestAccStorageBucket_publicAccessPrevention(t *testing.T) {
+	t.Parallel()
+
+	bucketName := fmt.Sprintf("tf-test-acl-bucket-%d", randInt(t))
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccStorageBucket_publicAccessPrevention(bucketName, "enforced"),
+			},
+			{
+				ResourceName:            "google_storage_bucket.bucket",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"force_destroy"},
+			},
+		},
+	})
+}
+
 func TestAccStorageBucket_uniformBucketAccessOnly(t *testing.T) {
 	t.Parallel()
 
@@ -1785,6 +1807,17 @@ resource "google_storage_bucket" "bucket" {
 `, bucketName, enabled)
 }
 
+func testAccStorageBucket_publicAccessPrevention(bucketName string, prevention string) string {
+	return fmt.Sprintf(`
+resource "google_storage_bucket" "bucket" {
+  name                      = "%s"
+  location                  = "US"
+  public_access_prevention  = "%s"
+  force_destroy             = true
+}
+`, bucketName, prevention)
+}
+
 func testAccStorageBucket_encryption(context map[string]interface{}) string {
 	return Nprintf(`
 resource "google_project" "acceptance" {

website/docs/r/storage_bucket.html.markdown

@@ -60,6 +60,19 @@ resource "google_storage_bucket" "auto-expire" {
   }
 }
 ```
+
+## Example Usage - Enabling public access prevention
+
+```hcl
+resource "google_storage_bucket" "auto-expire" {
+  name          = "no-public-access-bucket"
+  location      = "US"
+  force_destroy = true
+
+  public_access_prevention = "enforced"
+}
+```
+
 ## Argument Reference
 
 The following arguments are supported:
@@ -101,6 +114,8 @@ The following arguments are supported:
 
 * `uniform_bucket_level_access` - (Optional, Default: false) Enables [Uniform bucket-level access](https://cloud.google.com/storage/docs/uniform-bucket-level-access) access to a bucket.
 
+* `public_access_prevention` - (Optional) Prevents public access to a bucket. Acceptable values are "inherited" or "enforced". If "inherited", the bucket uses [public access prevention](https://cloud.google.com/storage/docs/public-access-prevention). only if the bucket is subject to the public access prevention organization policy constraint. Defaults to "inherited".
+
 * `custom_placement_config` - (Optional) The bucket's custom location configuration, which specifies the individual regions that comprise a dual-region bucket. If the bucket is designated a single or multi-region, the parameters are empty. Structure is [documented below](#nested_custom_placement_config).
 
 <a name="nested_lifecycle_rule"></a>The `lifecycle_rule` block supports: