main.tf

##########################################
# Retrieve the latest AMI id
##########################################
module "latest-ami" {
  source = "./modules/ami-latest"
  owners  = var.ami-owners-list
  regex   = var.ami-regex
}

##########################################
# Initiate the temp files
##########################################
data "template_file" "organization_list" {
  template = "${path.module}/organization-list-accts.log"
}

data "local_file" "getorganizationAccts" {
  filename   = data.template_file.organization_list.rendered
  depends_on = [null_resource.getorganizationAccts]
}

resource "null_resource" "getorganizationAccts" {
  provisioner "local-exec" {
    command     = "./aws-cli.sh"
    interpreter = ["bash"]
    environment = {
      FILE    = data.template_file.organization_list.rendered
      PROFILE = var.profile
    }
  }

  triggers = {
    lastrun = data.template_file.organization_list.rendered
  }
}

############################
# Packer File
############################

data "template_file" "ami-file" {
  template = "${file("${path.module}/ami-template.json")}"

  vars = {
    ami-name  = var.ami-name
    vpc_id    = var.vpc-id
    subnet_id = var.subnet-id
    # Remove substring if only 1 security group is needed
    security_groups = "${substr(local.security-groups, 1, length(local.security-groups) - 2)}"
    accounts        = "${substr(data.local_file.getorganizationAccts.content, 1, length(data.local_file.getorganizationAccts.content) - 2)}"
    # If you only have one account use -3
    # accounts         = "${substr(data.local_file.getorganizationAccts.content,1,length(data.local_file.getorganizationAccts.content)-3)}"
    source_ami       = module.latest-ami.ami-id
    region           = var.region
    profile          = var.profile
    instance_profile = var.instance-profile
    instance_type    = var.instance-type
    ssh_username     = var.ssh-username
    script           = "${"./amazon.sh"}"
    os               = var.os
  }
}

resource "local_file" "ami-json" {
  content  = data.template_file.ami-file.rendered
  filename = "ami.json"
}


############################
# String manipulation
############################
data "template_file" "security-groups" {
  count    = "${length(var.security-groups)}"
  template = "\"${element(var.security-groups, count.index)}\""
}

locals {
  security-groups = "${join(",", data.template_file.security-groups.*.rendered)}"
}