packer-cn/_ExportConfig-not-required.html.md at 0f09638f7a4c3f101dc9d709d10dc3b588c795f2

format (string) - Either ovf or ova, this specifies the output format of the exported virtual machine. This defaults to ovf.
export_opts ([]string) - Additional options to pass to the VBoxManage export. This can be useful for passing product information to include in the resulting appliance file. Packer JSON configuration file example:
```
{
  "type": "virtualbox-iso",
  "export_opts":
  [
    "--manifest",
    "--vsys", "0",
    "--description", "{{user `vm_description`}}",
    "--version", "{{user `vm_version`}}"
  ],
  "format": "ova",
}
```
A VirtualBox VM description may contain arbitrary strings; the GUI interprets HTML formatting. However, the JSON format does not allow arbitrary newlines within a value. Add a multi-line description by preparing the string in the shell before the packer call like this (shell > continuation character snipped for easier copy & paste):
```
vm_description='some
multiline
description'

vm_version='0.2.0'

packer build \
    -var "vm_description=${vm_description}" \
    -var "vm_version=${vm_version}"         \
    "packer_conf.json"
```