Add associated resource ARNs to aws_ram_resource_share data source

internal/service/ram/resource_share_data_source.go

@@ -8,6 +8,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
 	"github.com/hashicorp/terraform-provider-aws/internal/conns"
+	"github.com/hashicorp/terraform-provider-aws/internal/flex"
 	tftags "github.com/hashicorp/terraform-provider-aws/internal/tags"
 )
 
@@ -64,6 +65,14 @@ func DataSourceResourceShare() *schema.Resource {
 				Type:     schema.TypeString,
 				Computed: true,
 			},
+
+			"resources": {
+				Type:     schema.TypeList,
+				Computed: true,
+				Elem: &schema.Schema{
+					Type: schema.TypeString,
+				},
+			},
 		},
 	}
 }
@@ -123,6 +132,28 @@ func dataSourceResourceShareRead(d *schema.ResourceData, meta interface{}) error
 		params.NextToken = resp.NextToken
 	}
 
+	listInput := &ram.ListResourcesInput{
+		ResourceOwner:     aws.String(d.Get("resource_owner").(string)),
+		ResourceShareArns: aws.StringSlice([]string{d.Get("arn").(string)}),
+	}
+
+	var resourceARNs []*string
+	err := conn.ListResourcesPages(listInput, func(page *ram.ListResourcesOutput, lastPage bool) bool {
+		for _, resource := range page.Resources {
+			resourceARNs = append(resourceARNs, resource.Arn)
+		}
+
+		return !lastPage
+	})
+
+	if err != nil {
+		return fmt.Errorf("error reading RAM resource share resources %s: %s", d.Id(), err)
+	}
+
+	if err := d.Set("resources", flex.FlattenStringList(resourceARNs)); err != nil {
+		return fmt.Errorf("unable to set resources: %s", err)
+	}
+
 	return nil
 }
 

internal/service/ram/resource_share_data_source_test.go

@@ -31,6 +31,7 @@ func TestAccRAMResourceShareDataSource_basic(t *testing.T) {
 					resource.TestCheckResourceAttrPair(datasourceName, "name", resourceName, "name"),
 					resource.TestCheckResourceAttrPair(datasourceName, "id", resourceName, "id"),
 					resource.TestCheckResourceAttrSet(datasourceName, "owning_account_id"),
+					resource.TestCheckResourceAttr(datasourceName, "resources.%", "0"),
 				),
 			},
 		},
@@ -53,6 +54,29 @@ func TestAccRAMResourceShareDataSource_tags(t *testing.T) {
 					resource.TestCheckResourceAttrPair(datasourceName, "name", resourceName, "name"),
 					resource.TestCheckResourceAttrPair(datasourceName, "id", resourceName, "id"),
 					resource.TestCheckResourceAttrPair(datasourceName, "tags.%", resourceName, "tags.%"),
+					resource.TestCheckResourceAttr(datasourceName, "resources.%", "0"),
+				),
+			},
+		},
+	})
+}
+
+func TestAccRAMResourceShareDataSource_resources(t *testing.T) {
+	rName := sdkacctest.RandomWithPrefix(acctest.ResourcePrefix)
+	resourceName := "aws_ram_resource_share.test"
+	datasourceName := "data.aws_ram_resource_share.test"
+
+	resource.ParallelTest(t, resource.TestCase{
+		PreCheck:   func() { acctest.PreCheck(t) },
+		ErrorCheck: acctest.ErrorCheck(t, ram.EndpointsID),
+		Providers:  acctest.Providers,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccResourceShareDataSourceConfig_Resource(rName),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrPair(datasourceName, "name", resourceName, "name"),
+					resource.TestCheckResourceAttrPair(datasourceName, "id", resourceName, "id"),
+					resource.TestCheckResourceAttr(datasourceName, "resources.#", "1"),
 				),
 			},
 		},
@@ -98,6 +122,43 @@ data "aws_ram_resource_share" "test" {
 `, rName, rName, rName)
 }
 
+func testAccResourceShareDataSourceConfig_Resource(rName string) string {
+	return fmt.Sprintf(`
+resource "aws_ram_resource_share" "test" {
+  name = "tf-acc-test-ram-%s"
+}
+
+resource "aws_vpc" "test" {
+  cidr_block = "10.0.0.0/16"
+
+  tags = {
+    Name = "tf-acc-test-ram-%s"
+  }
+}
+
+resource "aws_subnet" "test" {
+  cidr_block = "10.0.0.0/24"
+  vpc_id     = aws_vpc.test.id
+
+  tags = {
+    Name = "tf-acc-test-ram-%s"
+  }
+}
+
+resource "aws_ram_resource_association" "test" {
+	resource_arn = aws_subnet.test.arn
+	resource_share_arn = aws_ram_resource_share.test.arn
+}
+
+data "aws_ram_resource_share" "test" {
+  name           = aws_ram_resource_share.test.name
+  resource_owner = "SELF"
+
+  depends_on = [aws_ram_resource_association.test]
+}
+`, rName, rName, rName)
+}
+
 const testAccResourceShareDataSourceConfig_NonExistent = `
 data "aws_ram_resource_share" "test" {
   name           = "tf-acc-test-does-not-exist"

website/docs/d/ram_resource_share.html.markdown

@@ -53,3 +53,4 @@ In addition to all arguments above, the following attributes are exported:
 * `status` - The Status of the RAM share.
 * `owning_account_id` - The ID of the AWS account that owns the resource share.
 * `tags` - The Tags attached to the RAM share
+* `resources` - A list of resource ARNs associated with this resource share