Currently, AWS CodeCommit is only available in us-east-1, therefore we

need to error out early if the region is anything other than this

Also added a test that will show that changes get applied on subsequent
runs

builtin/providers/aws/resource_aws_codecommit_repository.go

@@ -74,6 +74,13 @@ func resourceAwsCodeCommitRepository() *schema.Resource {
 
 func resourceAwsCodeCommitRepositoryCreate(d *schema.ResourceData, meta interface{}) error {
 	codecommitconn := meta.(*AWSClient).codecommitconn
+	region := meta.(*AWSClient).region
+
+	//	This is a temporary thing - we need to ensure that CodeCommit is only being run against us-east-1
+	//	As this is the only place that AWS currently supports it
+	if region != "us-east-1" {
+		return fmt.Errorf("CodeCommit can only be used with US-East-1")
+	}
 
 	input := &codecommit.CreateRepositoryInput{
 		RepositoryName:        aws.String(d.Get("repository_name").(string)),

builtin/providers/aws/resource_aws_codecommit_repository_test.go

@@ -26,6 +26,32 @@ func TestAccAWSCodeCommitRepository_basic(t *testing.T) {
 	})
 }
 
+func TestAccAWSCodeCommitRepository_withChanges(t *testing.T) {
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckCodeCommitRepositoryDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				Config: testAccCodeCommitRepository_basic,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckCodeCommitRepositoryExists("aws_codecommit_repository.test"),
+					resource.TestCheckResourceAttr(
+						"aws_codecommit_repository.test", "description", "This is a test description"),
+				),
+			},
+			resource.TestStep{
+				Config: testAccCodeCommitRepository_withChanges,
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckCodeCommitRepositoryExists("aws_codecommit_repository.test"),
+					resource.TestCheckResourceAttr(
+						"aws_codecommit_repository.test", "description", "This is a test description - with changes"),
+				),
+			},
+		},
+	})
+}
+
 func testAccCheckCodeCommitRepositoryExists(name string) resource.TestCheckFunc {
 	return func(s *terraform.State) error {
 		rs, ok := s.RootModule().Resources[name]
@@ -74,3 +100,10 @@ resource "aws_codecommit_repository" "test" {
   description = "This is a test description"
 }
 `
+
+const testAccCodeCommitRepository_withChanges = `
+resource "aws_codecommit_repository" "test" {
+  repository_name = "my_test_repository"
+  description = "This is a test description - with changes"
+}
+`