{
  "variables": {
    "ssh_keypair_name": "staging-0.1",
    "ssh_username": "ubuntu",
    "aws_subnet_id": "{{env `AWS_SUBNET_ID`}}",
    "aws_vpc_id": "{{env `AWS_VPC_ID`}}",
    "aws_region": null,
    "aws_instance_type": null,
    "aws_source_ami": null,
    "aws_target_ami": null,
    "aws_associate_public_ip_address": "false",
    "aws_enhanced_networking": "false",
    "appversion": "",
    "build_host": "",
    "repository": "",
    "package_type": "",
    "packages": "",
    "upgrade": "",
    "configDir": null
  },
  "builders": [{
    "type": "amazon-ebs",
    "ssh_keypair_name": "staging-0.1",
    "ssh_username": "ubuntu",
    "subnet_id": "{{user `aws_subnet_id`}}",
    "vpc_id": "{{user `aws_vpc_id`}}",
    "region": "{{user `aws_region`}}",
    "ssh_pty": true,
    "instance_type": "{{user `aws_instance_type`}}",
    "source_ami": "{{user `aws_source_ami`}}",
    "ami_name": "{{user `aws_target_ami`}}",
    "associate_public_ip_address": "{{user `aws_associate_public_ip_address`}}",
    "enhanced_networking": "{{user `aws_enhanced_networking`}}",
    "tags": {
      "appversion": "{{user `appversion`}}",
      "build_host": "{{user `build_host`}}",
      "build_info_url": "{{user `build_info_url`}}"
    },
    "run_tags": {"Packages": "{{user `packages`}}"}
  }],
  "provisioners": [{
    "type": "shell",
    "script": "{{user `configDir`}}/install_packages.sh",
    "environment_vars": [
      "repository={{user `repository`}}",
      "package_type={{user `package_type`}}",
      "packages={{user `packages`}}",
      "upgrade={{user `upgrade`}}"
    ],
    "pause_before": "30s"
  }]
}