{
    "variables": {},
    "provisioners": [
      {
        "type":  "ansible",
        "playbook_file": "./playbook.yml",
        "extra_arguments": [
        ],
        "sftp_command": "/usr/bin/false",
        "use_sftp": false
      }
    ],
    "builders": [
      {
        "type": "googlecompute",
        "account_file": "{{user `account_file`}}",
        "project_id": "{{user `project_id`}}",
        "image_name": "packerbats-scp-to-sftp-{{timestamp}}",
        "source_image": "debian-8-jessie-v20161027",
        "zone": "us-central1-a",
        "ssh_username": "debian",
        "ssh_file_transfer_method": "sftp"
      }
    ]
}