Terraform 0.12 (#5)

* Use Terraform 0.12 Beta 1

* Upgrade to config to HCL2 and Heroku provider 1.8.0-dev (included)

* Configure & ensure the workspace exists

* 📚 0.12 Beta 1 info

.profile

@@ -9,3 +9,7 @@ then
   cat terraform_init_output.log
   exit 1
 fi
+
+# Ensure the workspace exists
+TERRAFORM_WORKSPACE_NAME="${TERRAFORM_WORKSPACE_NAME:-default}"
+terraform workspace new $TERRAFORM_WORKSPACE_NAME

README.md

@@ -1,7 +1,9 @@
 Terraforming 🌱 Heroku app
 ===========================
 
-[Terraform](https://www.terraform.io/) as a [Heroku](https://www.heroku.com/) app.
+[Terraform](https://www.terraform.io/) [0.12 Beta 1](https://www.hashicorp.com/blog/announcing-terraform-0-1-2-beta1) as a [Heroku](https://www.heroku.com/) app.
+
+Includes a [0.12 dev snapshot](http://terraform-0.12.0-dev-snapshots.s3-website-us-west-2.amazonaws.com/terraform-provider-heroku/) of [Heroku Provider version 1.8.0](https://www.terraform.io/docs/providers/heroku/index.html).
 
 Run Terraform CLI in the cloud:
 
@@ -11,7 +13,7 @@ heroku run terraform apply
 
 🔬🚧 This is a community proof-of-concept, [MIT license](LICENSE), provided "as is", without warranty of any kind.
 
-🌲🔥 To enable the [Postgres backend](https://github.com/mars/terraform/blob/v0.11.9-pg.02/website/docs/backends/types/pg.html.md) for Terraform, this app uses the `terraform` binary built from an unmerged pull request to Terraform (see: [hashicorp/terraform #19070](https://github.com/hashicorp/terraform/pull/19070)).
+🌲🔥 To enable the [Postgres backend](https://github.com/mars/terraform/blob/postgres-backend/website/docs/backends/types/pg.html.md) for Terraform, this app uses the [`terraform` 0.12 Beta binary](https://releases.hashicorp.com/terraform/0.12.0-beta1/), which includes this new feature (see: [hashicorp/terraform #19070](https://github.com/hashicorp/terraform/pull/19070)).
 
 Set-up
 ------
@@ -170,10 +172,10 @@ cd terraforming-app/
 heroku create $APP_NAME --buildpack mars/terraforming
 heroku addons:create heroku-postgresql
 
-# Use our fork of Terraform that supports Postgres backend
+# Use 0.12 Beta of Terraform that supports Postgres backend
 # https://github.com/hashicorp/terraform/pull/19070
 #
-heroku config:set TERRAFORM_BIN_URL=https://terraforming-buildpack.s3.amazonaws.com/terraform_0.11.9-pg.02_linux_amd64.zip
+heroku config:set TERRAFORM_BIN_URL=https://releases.hashicorp.com/terraform/0.12.0-beta1/terraform_0.12.0-beta1_linux_amd64.zip
 
 # Set credentials for the Terraform Heroku provider
 heroku config:set HEROKU_API_KEY=xxxxx [email protected]
@@ -186,14 +188,16 @@ git push heroku master
 
 ### Run Terraform locally w/ Heroku Postgres backend
 
-🌲🔥 Requires local `terraform` binary built with the [pre-release Postgres backend](https://github.com/mars/terraform/releases/tag/v0.11.9-pg.02).
+🌲🔥 Requires using [Terraform 0.12 Beta](https://www.hashicorp.com/blog/announcing-terraform-0-1-2-beta1).
 
 ```bash
 # First-time for each terminal
 export DATABASE_URL=`heroku config:get DATABASE_URL`
-$GOPATH/src/github.com/hashicorp/terraform/pkg/darwin_amd64/terraform init -backend-config="conn_str=$DATABASE_URL"
+terraform init -backend-config="conn_str=$DATABASE_URL"
+# …or use a local database with SSL disabled
+terraform init -backend-config="conn_str=postgres://localhost/terraform_backend?sslmode=disable"
 
 # Continue using Terraform with the Heroku app's Postgres backend
-$GOPATH/src/github.com/hashicorp/terraform/pkg/darwin_amd64/terraform plan
-$GOPATH/src/github.com/hashicorp/terraform/pkg/darwin_amd64/terraform apply
+terraform plan
+terraform apply
 ```

app.json

@@ -18,7 +18,7 @@
   "env": {
     "TERRAFORM_BIN_URL": {
       "description": "The source URL for the terraform binary (preset for Postgres backend support)",
-      "value": "https://terraforming-buildpack.s3.amazonaws.com/terraform_0.11.9-pg.02_linux_amd64.zip",
+      "value": "https://releases.hashicorp.com/terraform/0.12.0-beta1/terraform_0.12.0-beta1_linux_amd64.zip",
       "required": false
     },
     "HEROKU_API_KEY": {
@@ -32,6 +32,11 @@
     "TF_VAR_example_app_name": {
       "description": "Name of app created by the example config in `main.tf`",
       "required": false
+    },
+    "TERRAFORM_WORKSPACE_NAME": {
+      "description": "Name of the Terraform workspace to store state",
+      "value": "default",
+      "required": true
     }
   }
 }

main.tf

@@ -1,40 +1,41 @@
 terraform {
-  backend "pg" {}
+  backend "pg" {
+  }
 }
 
 provider "heroku" {
-  version = "~> 1.7"
 }
 
 variable "example_app_name" {
   description = "Name of the Heroku app provisioned as an example"
 }
 
 resource "heroku_app" "example" {
-  name = "${var.example_app_name}"
+  name   = var.example_app_name
   region = "us"
 }
 
 resource "heroku_build" "example" {
-  app = "${heroku_app.example.name}"
+  app = heroku_app.example.name
 
   source = {
     path = "app/"
   }
 }
 
 resource "heroku_formation" "example" {
-  app        = "${heroku_app.example.name}"
+  app        = heroku_app.example.name
   type       = "web"
   quantity   = 1
   size       = "Standard-1x"
-  depends_on = ["heroku_build.example"]
+  depends_on = [heroku_build.example]
 }
 
 output "example_app_url" {
   value = "https://${heroku_app.example.name}.herokuapp.com"
 }
 
 output "example_app_build_log_url" {
-  value = "${heroku_build.example.output_stream_url}"
+  value = heroku_build.example.output_stream_url
 }
+

versions.tf

@@ -0,0 +1,4 @@
+
+terraform {
+  required_version = ">= 0.12"
+}