provider/aws: Update Lambda functions on name change (#7081)

Allows the updating of Lambda functions on name change alone

builtin/providers/aws/resource_aws_lambda_function.go

@@ -297,10 +297,11 @@ func resourceAwsLambdaFunctionUpdate(d *schema.ResourceData, meta interface{}) e
 	}
 
 	codeUpdate := false
-	if v, ok := d.GetOk("filename"); ok && d.HasChange("source_code_hash") {
+	if d.HasChange("filename") || d.HasChange("source_code_hash") {
-		file, err := loadFileContent(v.(string))
+		name := d.Get("filename").(string)
+		file, err := loadFileContent(name)
 		if err != nil {
-			return fmt.Errorf("Unable to load %q: %s", v.(string), err)
+			return fmt.Errorf("Unable to load %q: %s", name, err)
 		}
 		codeReq.ZipFile = file
 		codeUpdate = true
@@ -312,8 +313,8 @@ func resourceAwsLambdaFunctionUpdate(d *schema.ResourceData, meta interface{}) e
 		codeUpdate = true
 	}
 
-	log.Printf("[DEBUG] Send Update Lambda Function Code request: %#v", codeReq)
 	if codeUpdate {
+		log.Printf("[DEBUG] Send Update Lambda Function Code request: %#v", codeReq)
 		_, err := conn.UpdateFunctionCode(codeReq)
 		if err != nil {
 			return fmt.Errorf("Error modifying Lambda Function Code %s: %s", d.Id(), err)
@@ -352,8 +353,8 @@ func resourceAwsLambdaFunctionUpdate(d *schema.ResourceData, meta interface{}) e
 		configUpdate = true
 	}
 
-	log.Printf("[DEBUG] Send Update Lambda Function Configuration request: %#v", configReq)
 	if configUpdate {
+		log.Printf("[DEBUG] Send Update Lambda Function Configuration request: %#v", configReq)
 		_, err := conn.UpdateFunctionConfiguration(configReq)
 		if err != nil {
 			return fmt.Errorf("Error modifying Lambda Function Configuration %s: %s", d.Id(), err)

builtin/providers/aws/resource_aws_lambda_function_test.go

@@ -129,6 +129,54 @@ func TestAccAWSLambdaFunction_localUpdate(t *testing.T) {
 	})
 }
 
+func TestAccAWSLambdaFunction_localUpdate_nameOnly(t *testing.T) {
+	var conf lambda.GetFunctionOutput
+
+	path, zipFile, err := createTempFile("lambda_localUpdate")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(path)
+
+	updatedPath, updatedZipFile, err := createTempFile("lambda_localUpdate_name_change")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.Remove(updatedPath)
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckLambdaFunctionDestroy,
+		Steps: []resource.TestStep{
+			resource.TestStep{
+				PreConfig: func() {
+					testAccCreateZipFromFiles(map[string]string{"test-fixtures/lambda_func.js": "lambda.js"}, zipFile)
+				},
+				Config: genAWSLambdaFunctionConfig_local_name_only(path),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckAwsLambdaFunctionExists("aws_lambda_function.lambda_function_local", "tf_acc_lambda_name_local", &conf),
+					testAccCheckAwsLambdaFunctionName(&conf, "tf_acc_lambda_name_local"),
+					testAccCheckAwsLambdaFunctionArnHasSuffix(&conf, "tf_acc_lambda_name_local"),
+					testAccCheckAwsLambdaSourceCodeHash(&conf, "un6qF9S9hKvXbWwJ6m2EYaVCWjcr0PCZWiTV3h4zB0I="),
+				),
+			},
+			resource.TestStep{
+				PreConfig: func() {
+					testAccCreateZipFromFiles(map[string]string{"test-fixtures/lambda_func_modified.js": "lambda.js"}, updatedZipFile)
+				},
+				Config: genAWSLambdaFunctionConfig_local_name_only(updatedPath),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckAwsLambdaFunctionExists("aws_lambda_function.lambda_function_local", "tf_acc_lambda_name_local", &conf),
+					testAccCheckAwsLambdaFunctionName(&conf, "tf_acc_lambda_name_local"),
+					testAccCheckAwsLambdaFunctionArnHasSuffix(&conf, "tf_acc_lambda_name_local"),
+					testAccCheckAwsLambdaSourceCodeHash(&conf, "Y5Jf4Si63UDy1wKNfPs+U56ZL0NxsieKPt9EwRl4GQM="),
+				),
+			},
+		},
+	})
+}
+
 func TestAccAWSLambdaFunction_s3Update(t *testing.T) {
 	var conf lambda.GetFunctionOutput
 
@@ -505,6 +553,38 @@ func genAWSLambdaFunctionConfig_local(filePath string) string {
 		filePath, filePath)
 }
 
+func genAWSLambdaFunctionConfig_local_name_only(filePath string) string {
+	return fmt.Sprintf(testAccAWSLambdaFunctionConfig_local_name_only_tpl,
+		filePath)
+}
+
+const testAccAWSLambdaFunctionConfig_local_name_only_tpl = `
+resource "aws_iam_role" "iam_for_lambda" {
+    name = "iam_for_lambda"
+    assume_role_policy = <<EOF
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Action": "sts:AssumeRole",
+      "Principal": {
+        "Service": "lambda.amazonaws.com"
+      },
+      "Effect": "Allow",
+      "Sid": ""
+    }
+  ]
+}
+EOF
+}
+resource "aws_lambda_function" "lambda_function_local" {
+    filename = "%s"
+    function_name = "tf_acc_lambda_name_local"
+    role = "${aws_iam_role.iam_for_lambda.arn}"
+    handler = "exports.example"
+}
+`
+
 const testAccAWSLambdaFunctionConfig_s3_tpl = `
 resource "aws_s3_bucket" "artifacts" {
 	bucket = "%s"