metastore dataproc service data source (GoogleCloudPlatform#5763)

* metastore dataproc service data source

* provider

* docs

* test name

* location optional

* revert location and make required

* docs

* docs

* tf test

mmv1/third_party/terraform/data_sources/data_source_dataproc_metastore_service.go.erb

@@ -0,0 +1,34 @@
+<% autogen_exception -%>
+package google
+
+<% unless version == 'ga' -%>
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+func dataSourceDataprocMetastoreService() *schema.Resource {
+
+	dsSchema := datasourceSchemaFromResourceSchema(resourceDataprocMetastoreService().Schema)
+	addRequiredFieldsToSchema(dsSchema, "service_id")
+	addRequiredFieldsToSchema(dsSchema, "location")
+	addOptionalFieldsToSchema(dsSchema, "project")
+
+	return &schema.Resource{
+		Read:   dataSourceDataprocMetastoreServiceRead,
+		Schema: dsSchema,
+	}
+}
+
+func dataSourceDataprocMetastoreServiceRead(d *schema.ResourceData, meta interface{}) error {
+	id, err := replaceVars(d, meta.(*Config), "projects/{{project}}/locations/{{location}}/services/{{service_id}}")
+	if err != nil {
+		return fmt.Errorf("Error constructing id: %s", err)
+	}
+	d.SetId(id)
+	return resourceDataprocMetastoreServiceRead(d, meta)
+}
+
+<% end -%>

mmv1/third_party/terraform/tests/data_source_dataproc_metastore_service_test.go.erb

@@ -0,0 +1,51 @@
+<% autogen_exception -%>
+package google
+<% unless version == 'ga' -%>
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/resource"
+)
+
+func TestAccDataprocMetastoreServiceDatasource_basic(t *testing.T) {
+	t.Parallel()
+
+	name := "tf-test-" + randString(t, 10)
+
+	vcrTest(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccDataprocMetastoreServiceDatasource_basic(name, "DEVELOPER"),
+				Check: resource.ComposeTestCheckFunc(
+					checkDataSourceStateMatchesResourceState("data.google_dataproc_metastore_service.my_metastore", "google_dataproc_metastore_service.my_metastore"),
+				),
+			},
+		},
+	})
+}
+
+func testAccDataprocMetastoreServiceDatasource_basic(name, tier string) string {
+	return fmt.Sprintf(`
+resource "google_dataproc_metastore_service" "my_metastore" {
+	service_id = "%s"
+	location   = "us-central1"
+	tier       = "%s"
+
+	hive_metastore_config {
+		version = "2.3.6"
+	}
+}
+
+data "google_dataproc_metastore_service" "my_metastore" {
+	service_id = google_dataproc_metastore_service.my_metastore.service_id
+	location = google_dataproc_metastore_service.my_metastore.location
+}
+`, name, tier)
+}
+<% else %>
+// Magic Modules doesn't let us remove files - blank out beta-only common-compile files for now.
+<% end -%>

mmv1/third_party/terraform/utils/provider.go.erb

@@ -256,6 +256,9 @@ func Provider() *schema.Provider {
 			"google_container_engine_versions":                 dataSourceGoogleContainerEngineVersions(),
 			"google_container_registry_image":                  dataSourceGoogleContainerImage(),
 			"google_container_registry_repository":             dataSourceGoogleContainerRepo(),
+			<% unless version == 'ga' -%>
+			"google_dataproc_metastore_service":                dataSourceDataprocMetastoreService(),
+			<% end -%>
 			"google_dns_keys":                                  dataSourceDNSKeys(),
 			"google_dns_managed_zone":                          dataSourceDnsManagedZone(),
 			"google_dns_record_set":                            dataSourceDnsRecordSet(),

mmv1/third_party/terraform/website/docs/d/data_source_dataproc_metastore_service.markdown

@@ -0,0 +1,40 @@
+---
+subcategory: "Dataproc"
+layout: "google"
+page_title: "Google: google_dataproc_metastore_service"
+sidebar_current: "docs-google-datasource-dataproc-metastore-service"
+description: |-
+  Get a Dataproc Metastore Service from Google Cloud
+---
+
+# google\_dataproc\_metastore\_service
+
+Get a Dataproc Metastore service from Google Cloud by its id and location.
+
+~> **Warning:** This resource is in beta, and should be used with the terraform-provider-google-beta provider.
+See [Provider Versions](https://terraform.io/docs/providers/google/guides/provider_versions.html) for more details on beta resources.
+
+## Example Usage
+
+```tf
+data "google_dataproc_metastore_service" "foo" {
+  service_id = "foo-bar"
+  location   = "global"  
+}
+```
+
+## Argument Reference
+
+The following arguments are supported:
+
+* `service_id` - (Required) The ID of the metastore service.
+* `location` - (Required) The location where the metastore service resides.
+
+- - -
+
+* `project` - (Optional) The project in which the resource belongs. If it
+    is not provided, the provider project is used.
+
+## Attributes Reference
+
+See [google_dataproc_metastore_service](https://www.terraform.io/docs/providers/google/r/dataproc_metastore_service.html) resource for details of all the available attributes.