update for terraform 0.12

main.tf

@@ -15,35 +15,36 @@ data "aws_iam_policy_document" "trust" {
 }
 
 resource "aws_lambda_function" "this" {
-  s3_bucket     = "${var.source_bucket}"
+  s3_bucket     = var.source_bucket
   s3_key        = "${var.source_prefix}${var.source_version}.zip"
-  function_name = "${var.function_name}"
-  role          = "${aws_iam_role.lambda.arn}"
-  handler       = "${var.handler}"
-  runtime       = "${var.runtime}"
-  timeout       = "${var.timeout}"
+  function_name = var.function_name
+  role          = aws_iam_role.lambda.arn
+  handler       = var.handler
+  runtime       = var.runtime
+  timeout       = var.timeout
 
   environment {
-    variables = "${var.environment_variables}"
+    variables = var.environment_variables
   }
 }
 
 resource "aws_lambda_permission" "allow_source" {
-  function_name = "${aws_lambda_function.this.function_name}"
+  function_name = aws_lambda_function.this.function_name
   statement_id  = "AllowExecutionFrom${title(var.source_types[count.index])}"
   action        = "lambda:InvokeFunction"
   principal     = "${var.source_types[count.index]}.amazonaws.com"
-  source_arn    = "${var.source_arns[count.index]}"
-  count         = "${length(var.source_types)}"
+  source_arn    = var.source_arns[count.index]
+  count         = length(var.source_types)
 }
 
 resource "aws_iam_role_policy" "lambda_perms" {
   name   = "lambda_perms"
-  role   = "${aws_iam_role.lambda.name}"
-  policy = "${var.access_policy_document}"
+  role   = aws_iam_role.lambda.name
+  policy = var.access_policy_document
 }
 
 resource "aws_iam_role" "lambda" {
-  name               = "${var.function_name}"
-  assume_role_policy = "${data.aws_iam_policy_document.trust.json}"
+  name               = var.function_name
+  assume_role_policy = data.aws_iam_policy_document.trust.json
 }
+

outputs.tf

@@ -1,7 +1,8 @@
 output "arn" {
-  value = "${aws_lambda_function.this.arn}"
+  value = aws_lambda_function.this.arn
 }
 
 output "invoke_arn" {
-  value = "${aws_lambda_function.this.invoke_arn}"
+  value = aws_lambda_function.this.invoke_arn
 }
+

variables.tf

@@ -1,60 +1,61 @@
 variable "runtime" {
   description = "Language to use for Lambda"
-  type        = "string"
+  type        = string
   default     = "go1.x"
 }
 
 variable "handler" {
   description = "Program entrypoint for Lambda"
-  type        = "string"
+  type        = string
   default     = "main"
 }
 
 variable "timeout" {
   description = "Timeout after which Lamdba will terminate"
-  type        = "string"
+  type        = string
   default     = "10"
 }
 
 variable "source_bucket" {
   description = "Bucket to use for loading Lambda source ZIP"
-  type        = "string"
+  type        = string
 }
 
 variable "source_prefix" {
   description = "S3 prefix to use for loading Lambda ZIP"
-  type        = "string"
+  type        = string
   default     = ""
 }
 
 variable "source_version" {
   description = "Version of Lambda ZIP to use"
-  type        = "string"
+  type        = string
 }
 
 variable "function_name" {
   description = "Name for Lambda function"
-  type        = "string"
+  type        = string
 }
 
 variable "environment_variables" {
   description = "Variables to provide for Lambda environment"
-  type        = "map"
+  type        = map(string)
   default     = {}
 }
 
 variable "access_policy_document" {
   description = "IAM policy provided to Lambda role"
-  type        = "string"
+  type        = string
 }
 
 variable "source_types" {
   description = "Source types which are allowed to invoke the Lambda. Must align with entries in source_arns variable"
-  type        = "list"
+  type        = list(string)
   default     = ["apigateway"]
 }
 
 variable "source_arns" {
   description = "Source ARNs which are allowed to invoke the Lambda. Must align with entries in source_types variable"
-  type        = "list"
+  type        = list(string)
 }
+