Add App Engine Default Service Account datasource

.changelog/4049.txt

@@ -0,0 +1,3 @@
+```release-note:new-datasource
+`google_app_engine_default_service_account`
+```

google/data_source_google_app_engine_default_service_account.go

@@ -0,0 +1,80 @@
+package google
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+func dataSourceGoogleAppEngineDefaultServiceAccount() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceGoogleAppEngineDefaultServiceAccountRead,
+		Schema: map[string]*schema.Schema{
+			"project": {
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+			},
+			"email": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+			"unique_id": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+			"name": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+			"display_name": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+		},
+	}
+}
+
+func dataSourceGoogleAppEngineDefaultServiceAccountRead(d *schema.ResourceData, meta interface{}) error {
+	config := meta.(*Config)
+	userAgent, err := generateUserAgentString(d, config.userAgent)
+	if err != nil {
+		return err
+	}
+
+	project, err := getProject(d, config)
+	if err != nil {
+		return err
+	}
+
+	serviceAccountEmail := fmt.Sprintf("%[email protected]", project)
+
+	serviceAccountName, err := serviceAccountFQN(serviceAccountEmail, d, config)
+	if err != nil {
+		return err
+	}
+
+	sa, err := config.NewIamClient(userAgent).Projects.ServiceAccounts.Get(serviceAccountName).Do()
+	if err != nil {
+		return handleNotFoundError(err, d, fmt.Sprintf("Service Account %q", serviceAccountName))
+	}
+
+	d.SetId(sa.Name)
+	if err := d.Set("email", sa.Email); err != nil {
+		return fmt.Errorf("Error setting email: %s", err)
+	}
+	if err := d.Set("unique_id", sa.UniqueId); err != nil {
+		return fmt.Errorf("Error setting unique_id: %s", err)
+	}
+	if err := d.Set("project", sa.ProjectId); err != nil {
+		return fmt.Errorf("Error setting project: %s", err)
+	}
+	if err := d.Set("name", sa.Name); err != nil {
+		return fmt.Errorf("Error setting name: %s", err)
+	}
+	if err := d.Set("display_name", sa.DisplayName); err != nil {
+		return fmt.Errorf("Error setting display_name: %s", err)
+	}
+
+	return nil
+}

google/data_source_google_app_engine_default_service_account_test.go

@@ -0,0 +1,34 @@
+package google
+
+import (
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccDataSourceGoogleAppEngineDefaultServiceAccount_basic(t *testing.T) {
+	t.Parallel()
+
+	resourceName := "data.google_app_engine_default_service_account.default"
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:  func() { testAccPreCheck(t) },
+		Providers: testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccCheckGoogleAppEngineDefaultServiceAccount_basic,
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrSet(resourceName, "id"),
+					resource.TestCheckResourceAttrSet(resourceName, "email"),
+					resource.TestCheckResourceAttrSet(resourceName, "unique_id"),
+					resource.TestCheckResourceAttrSet(resourceName, "name"),
+					resource.TestCheckResourceAttrSet(resourceName, "display_name"),
+				),
+			},
+		},
+	})
+}
+
+const testAccCheckGoogleAppEngineDefaultServiceAccount_basic = `
+data "google_app_engine_default_service_account" "default" {}
+`

google/data_source_google_compute_default_service_account_test.go

@@ -30,5 +30,5 @@ func TestAccDataSourceGoogleComputeDefaultServiceAccount_basic(t *testing.T) {
 }
 
 const testAccCheckGoogleComputeDefaultServiceAccount_basic = `
-data "google_compute_default_service_account" "default" { }
+data "google_compute_default_service_account" "default" {}
 `

google/provider.go

@@ -559,6 +559,7 @@ func Provider() *schema.Provider {
 
 		DataSourcesMap: map[string]*schema.Resource{
 			"google_active_folder":                                dataSourceGoogleActiveFolder(),
+			"google_app_engine_default_service_account":           dataSourceGoogleAppEngineDefaultServiceAccount(),
 			"google_billing_account":                              dataSourceGoogleBillingAccount(),
 			"google_bigquery_default_service_account":             dataSourceGoogleBigqueryDefaultServiceAccount(),
 			"google_client_config":                                dataSourceGoogleClientConfig(),

website/docs/d/app_engine_default_service_account.html.markdown

@@ -0,0 +1,42 @@
+---
+subcategory: "App Engine"
+layout: "google"
+page_title: "Google: google_app_engine_default_service_account"
+sidebar_current: "docs-google-datasource-app_engine-default-service-account"
+description: |-
+  Retrieve the default App Engine service account used in this project
+---
+
+# google\_app_engine\_default\_service\_account
+
+Use this data source to retrieve the default App Engine service account for the specified project.
+
+## Example Usage
+
+```hcl
+data "google_app_engine_default_service_account" "default" {
+}
+
+output "default_account" {
+  value = data.google_app_engine_default_service_account.default.email
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `project` - (Optional) The project ID. If it is not provided, the provider project is used.
+
+
+## Attributes Reference
+
+The following attributes are exported:
+
+* `email` - Email address of the default service account used by App Engine in this project.
+
+* `unique_id` - The unique id of the service account.
+
+* `name` - The fully-qualified name of the service account.
+
+* `display_name` - The display name for the service account.

website/google.erb

@@ -106,6 +106,16 @@
     <li>
     <a href="#">App Engine</a>
     <ul class="nav">
+      <li>
+        <a href="#">Data Sources</a>
+        <ul class="nav nav-auto-expand">
+
+          <li>
+          <a href="/docs/providers/google/d/app_engine_default_service_account.html">google_app_engine_default_service_account</a>
+          </li>
+
+        </ul>
+      </li>
       <li>
         <a href="#">Resources</a>
         <ul class="nav nav-auto-expand">