Fixes #9: Add support for Terraform 0.12

terraform-google-modules/terraform-google-event-function#20

- Migrated to the new TF 0.12 syntax
- Added type for variables
- Removed instances of unnecessary string interpolation from the code
base
- Removed unnecessary "element" calls
- Run tests locally
- Switched to docker image for terraform 0.12 (version 2.0.0)
- Updated CHANGELOG.md
- Updated README.md, add latest 0.11 release

Author: nick4fake

CHANGELOG.md

@@ -5,9 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog][keepachangelog-site],
 and this project adheres to [Semantic Versioning][semver-site].
 
-
 ## [Unreleased]
 
+## [1.0.0] - 2019-YY-ZZ
+
+### Changed
+
+- Supported version of Terraform is 0.12. [#11]
+
 ## [0.4.1] - 2019-07-03
 
 ### Fixed
@@ -45,6 +50,7 @@ and this project adheres to [Semantic Versioning][semver-site].
 [0.2.0]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/compare/v0.1.0...v0.2.0
 [0.1.0]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/releases/tag/v0.1.0
 
+[#11]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/pull/11
 [#8]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/pull/8
 [#5]: https://github.com/terraform-google-modules/terraform-google-scheduled-function/pull/5
 

Makefile

@@ -18,7 +18,7 @@ SHELL := /usr/bin/env bash
 # Docker build config variables
 CREDENTIALS_PATH 			?= /cft/workdir/credentials.json
 DOCKER_ORG 				:= gcr.io/cloud-foundation-cicd
-DOCKER_TAG_BASE_KITCHEN_TERRAFORM 	?= 0.11.11_235.0.0_1.19.1_0.1.10
+DOCKER_TAG_BASE_KITCHEN_TERRAFORM 	?= 2.3.0
 DOCKER_REPO_BASE_KITCHEN_TERRAFORM 	:= ${DOCKER_ORG}/cft/kitchen-terraform:${DOCKER_TAG_BASE_KITCHEN_TERRAFORM}
 
 # All is the first target in the file so it will get picked up when you just run 'make' on its own

README.md

@@ -1,6 +1,14 @@
 # Terraform Google Scheduled Functions Module
+
 This modules makes it easy to set up a scheduled job to trigger events/run functions.
 
+## Compatibility
+
+This module is meant for use with Terraform 0.12. If you haven't
+[upgraded](https://www.terraform.io/upgrade-guides/0-12.html) and need a Terraform 0.11.x-compatible
+version of this module, the last released version intended for Terraform 0.11.x
+is [v0.4.1](https://registry.terraform.io/modules/terraform-google-modules/scheduled-function/google/0.4.1).
+
 ## Usage
 You can go to the examples folder, however the usage of the module could be like this in your own main.tf file:
 
@@ -62,7 +70,7 @@ Then perform the following commands on the root folder:
 
 ## Requirements
 ### Terraform plugins
-- [Terraform](https://www.terraform.io/downloads.html) 0.11.x
+- [Terraform](https://www.terraform.io/downloads.html) 0.12.x
 - [terraform-provider-google](https://github.com/terraform-providers/terraform-provider-google) plugin v2.1
 
 ### App Engine
@@ -94,7 +102,7 @@ In order to operate with the Service Account you must activate the following API
 ## Install
 
 ### Terraform
-Be sure you have the correct Terraform version (0.11.x), you can choose the binary here:
+Be sure you have the correct Terraform version (0.12.x), you can choose the binary here:
 - https://releases.hashicorp.com/terraform/
 
 ## Testing and documentation generation

examples/pubsub_scheduled/main.tf

@@ -14,24 +14,28 @@
  * limitations under the License.
  */
 
+terraform {
+  required_version = ">= 0.12"
+}
+
 provider "google-beta" {
-  version = "~> 2.1"
-  project = "${var.project_id}"
-  region  = "${var.region}"
+  version = "~> 2.5"
+  project = var.project_id
+  region  = var.region
 }
 
 module "pubsub_scheduled_example" {
   providers = {
-    google = "google-beta"
+    google = google-beta
   }
 
   source                    = "../../"
-  project_id                = "${var.project_id}"
+  project_id                = var.project_id
   job_name                  = "pubsub-example"
   job_schedule              = "*/5 * * * *"
   function_entry_point      = "doSomething"
   function_source_directory = "${path.module}/function_source"
   function_name             = "testfunction-foo"
-  region                    = "${var.region}"
+  region                    = var.region
   topic_name                = "pubsub_example_topic"
 }

examples/pubsub_scheduled/outputs.tf

@@ -15,11 +15,11 @@
  */
 
 output "name" {
-  value       = "${module.pubsub_scheduled_example.name}"
+  value       = module.pubsub_scheduled_example.name
   description = "The name of the job created"
 }
 
 output "project_id" {
-  value       = "${var.project_id}"
+  value       = var.project_id
   description = "The project ID"
 }

examples/pubsub_scheduled/variables.tf

@@ -15,10 +15,12 @@
  */
 
 variable "project_id" {
+  type        = string
   description = "The project ID to host the network in"
 }
 
 variable "region" {
+  type        = string
   description = "The region the project is in (App Engine specific)"
   default     = "us-central1"
 }

main.tf

@@ -19,16 +19,16 @@
  *****************************************/
 
 resource "google_cloud_scheduler_job" "job" {
-  name        = "${var.job_name}"
-  project     = "${var.project_id}"
-  region      = "${var.region}"
-  description = "${var.job_description}"
-  schedule    = "${var.job_schedule}"
-  time_zone   = "${var.time_zone}"
+  name        = var.job_name
+  project     = var.project_id
+  region      = var.region
+  description = var.job_description
+  schedule    = var.job_schedule
+  time_zone   = var.time_zone
 
-  pubsub_target = {
+  pubsub_target {
     topic_name = "projects/${var.project_id}/topics/${module.pubsub_topic.topic}"
-    data       = "${var.message_data}"
+    data       = var.message_data
   }
 }
 
@@ -37,45 +37,46 @@ resource "google_cloud_scheduler_job" "job" {
  *****************************************/
 
 module "pubsub_topic" {
-  source     = "github.com/terraform-google-modules/terraform-google-pubsub?ref=v0.1.0"
-  topic      = "${var.topic_name}"
-  project_id = "${var.project_id}"
+  source     = "terraform-google-modules/pubsub/google"
+  version    = "~> 1.0"
+  topic      = var.topic_name
+  project_id = var.project_id
 }
 
 /******************************************
 	Cloud Function Resource Definitions
  *****************************************/
 
 resource "google_cloudfunctions_function" "main" {
-  name                  = "${var.function_name}"
-  source_archive_bucket = "${google_storage_bucket.main.name}"
-  source_archive_object = "${google_storage_bucket_object.main.name}"
-  description           = "${var.function_description}"
-  available_memory_mb   = "${var.function_available_memory_mb}"
-  timeout               = "${var.function_timeout_s}"
-  entry_point           = "${var.function_entry_point}"
+  name                  = var.function_name
+  source_archive_bucket = google_storage_bucket.main.name
+  source_archive_object = google_storage_bucket_object.main.name
+  description           = var.function_description
+  available_memory_mb   = var.function_available_memory_mb
+  timeout               = var.function_timeout_s
+  entry_point           = var.function_entry_point
 
   event_trigger {
     event_type = "google.pubsub.topic.publish"
-    resource   = "${module.pubsub_topic.topic}"
+    resource   = module.pubsub_topic.topic
 
     failure_policy {
-      retry = "${var.function_event_trigger_failure_policy_retry}"
+      retry = var.function_event_trigger_failure_policy_retry
     }
   }
 
-  labels                = "${var.function_labels}"
-  runtime               = "${var.function_runtime}"
-  environment_variables = "${var.function_environment_variables}"
-  project               = "${var.project_id}"
-  region                = "${var.region}"
-  service_account_email = "${var.function_service_account_email}"
+  labels                = var.function_labels
+  runtime               = var.function_runtime
+  environment_variables = var.function_environment_variables
+  project               = var.project_id
+  region                = var.region
+  service_account_email = var.function_service_account_email
 }
 
 data "archive_file" "main" {
   type        = "zip"
-  output_path = "${pathexpand("${var.function_source_directory}.zip")}"
-  source_dir  = "${pathexpand("${var.function_source_directory}")}"
+  output_path = pathexpand("${var.function_source_directory}.zip")
+  source_dir  = pathexpand(var.function_source_directory)
 }
 
 resource "random_string" "random_suffix" {
@@ -85,18 +86,21 @@ resource "random_string" "random_suffix" {
 }
 
 resource "google_storage_bucket" "main" {
-  name          = "${coalesce(var.bucket_name, "${var.project_id}-scheduled-function-${random_string.random_suffix.result}")}"
+  name = coalesce(
+    var.bucket_name,
+    "${var.project_id}-scheduled-function-${random_string.random_suffix.result}",
+  )
   force_destroy = "true"
-  location      = "${var.region}"
-  project       = "${var.project_id}"
+  location      = var.region
+  project       = var.project_id
   storage_class = "REGIONAL"
-  labels        = "${var.function_source_archive_bucket_labels}"
+  labels        = var.function_source_archive_bucket_labels
 }
 
 resource "google_storage_bucket_object" "main" {
   name                = "event_function-${random_string.random_suffix.result}.zip"
-  bucket              = "${google_storage_bucket.main.name}"
-  source              = "${data.archive_file.main.output_path}"
+  bucket              = google_storage_bucket.main.name
+  source              = data.archive_file.main.output_path
   content_disposition = "attachment"
   content_encoding    = "gzip"
   content_type        = "application/zip"

modules/project_cleanup/main.tf

@@ -15,35 +15,35 @@
  */
 
 resource "google_service_account" "project_cleaner_function" {
-  project      = "${var.project_id}"
+  project      = var.project_id
   account_id   = "project-cleaner-function"
   display_name = "Project Cleaner Function"
 }
 
 resource "google_organization_iam_member" "project_owner" {
-  org_id = "${var.organization_id}"
+  org_id = var.organization_id
   role   = "roles/owner"
   member = "serviceAccount:${google_service_account.project_cleaner_function.email}"
 }
 
 module "scheduled_project_cleaner" {
   source                         = "../../"
-  project_id                     = "${var.project_id}"
+  project_id                     = var.project_id
   job_name                       = "project-cleaner"
   job_schedule                   = "*/5 * * * *"
   function_entry_point           = "CleanUpProjects"
   function_source_directory      = "${path.module}/function_source"
   function_name                  = "old-project-cleaner"
-  region                         = "${var.region}"
+  region                         = var.region
   topic_name                     = "pubsub_scheduled_project_cleaner"
-  function_available_memory_mb   = "128"
+  function_available_memory_mb   = 128
   function_description           = "Clean up GCP projects older than ${var.max_project_age_in_hours} hours matching particular tags"
   function_runtime               = "go111"
   function_service_account_email = "${google_service_account.project_cleaner_function.email}"
 
   function_environment_variables = {
-    TARGET_TAG_NAME       = "${var.target_tag_name}"
-    TARGET_TAG_VALUE      = "${var.target_tag_value}"
-    MAX_PROJECT_AGE_HOURS = "${var.max_project_age_in_hours}"
+    TARGET_TAG_NAME       = var.target_tag_name
+    TARGET_TAG_VALUE      = var.target_tag_value
+    MAX_PROJECT_AGE_HOURS = var.max_project_age_in_hours
   }
 }

modules/project_cleanup/variables.tf

@@ -15,28 +15,34 @@
  */
 
 variable "organization_id" {
+  type        = string
   description = "The organization ID whose projects to clean up"
 }
 
 variable "project_id" {
+  type        = string
   description = "The project ID to host the scheduled function in"
 }
 
 variable "region" {
+  type        = string
   description = "The region the project is in (App Engine specific)"
 }
 
 variable "target_tag_name" {
+  type        = string
   description = "The name of a tag to filter GCP projects on for consideration by the cleanup utility"
   default     = "cft-ephemeral"
 }
 
 variable "target_tag_value" {
+  type        = string
   description = "The value of a tag to filter GCP projects on for consideration by the cleanup utility"
   default     = "true"
 }
 
 variable "max_project_age_in_hours" {
+  type        = number
   description = "The maximum number of hours that a GCP project, selected by `target_tag_name` and `target_tag_value`, can exist"
-  default     = "6"
+  default     = 6
 }

outputs.tf

@@ -15,6 +15,6 @@
  */
 
 output "name" {
-  value       = "${google_cloud_scheduler_job.job.name}"
+  value       = google_cloud_scheduler_job.job.name
   description = "The name of the job created"
 }