#announcements - July 2018

that is an actual terraform argument I think

variable "git_ref" {
  default = "tag"
}

data "external" "example" {
  count = "${var.git_ref == "tag" ? 1 : 0}"
  program = ["git", "-C", "${path.module}", "tag", "--points-at", "HEAD", "--format={\"ref\": \"%(refname:lstrip=2)\"}"]

  query = {
  }
}


output "ref" {
  value = "${join("", data.external.example.*.result.ref)}"
}

ref = test-0.1.1

locals { cluster_name = "${element(split("/",(aws_ecs_cluster.default.arn), 1)}"}

### For looking up info from the other Terraform States
variable "state_bucket" {
  description = "The bucket name where the chared Terraform state is kept"
}

variable "state_region" {
  description = "The region for the Terraform state bucket"
}

variable "env" {
  description = "The terraform workspace name."
}

locals {
  state_path = "${var.env == "default" ? "" : "env:/${var.env}/" }"
}

### Look up remote state info

data "terraform_remote_state" "vpc" {
  backend = "s3"

  config {
    bucket = "${var.state_bucket}"
    key    = "${local.state_path}vpc/state.tfstate"
    region = "${var.state_region}"
  }
}

data "terraform_remote_state" "backing_services" {
  backend = "s3"

  config {
    bucket = "${module.identity.namespace}-${module.identity.stage}-terraform-state"
    key    = "backing-services/terraform.tfstate"
  }
}

resource "aws_thing" "default" {
  tags = { managedby = "Terraform"}
}

output "thing" { value = "the thing i mentioned" }

if (...) {
....
}

if (...)
{
...
}

data:
  template_file:
    example:
      template: '${hello} ${world}!'
      vars:
        hello: goodnight
        world: moon
output:
  rendered:
    value: '${data.template_file.example.rendered}'

variable:
  count:
    default: 2
  hostnames:
    default:
      '0': <http://example1.org|example1.org>
      '1': <http://example2.net|example2.net>
data:
  template_file:
    web_init:
      count: '${var.count}'
      template: '${file("templates/web_init.tpl")}'
      vars:
        hostname: '${lookup(var.hostnames, count.index)}'
resource:
  aws_instance:
    web:
      count: '${var.count}'
      user_data: '${element(data.template_file.web_init.*.rendered, count.index)}'

data "template_file" "example" {
  template = "${hello} ${world}!"
  vars {
    hello = "goodnight"
    world = "moon"
  }
}

output "rendered" {
  value = "${data.template_file.example.rendered}"
}

variable "count" {
  default = 2
}

variable "hostnames" {
  default = {
    "0" = "<http://example1.org|example1.org>"
    "1" = "<http://example2.net|example2.net>"
  }
}

data "template_file" "web_init" {
  // here we expand multiple template_files - the same number as we have instances
  count    = "${var.count}"
  template = "${file("templates/web_init.tpl")}"
  vars {
    // that gives us access to use count.index to do the lookup
    hostname = "${lookup(var.hostnames, count.index)}"
  }
}

resource "aws_instance" "web" {
  // ...
  count = "${var.count}"
  // here we link each web instance to the proper template_file
  user_data = "${element(data.template_file.web_init.*.rendered, count.index)}"
}