I think you should be able to do something like this:
```
variable "disk_size1" {
default = 24
type = number
}
variable "disk_size2" {
default = 0
type = number
}
locals {
// use the ternary operator to define the storage elements
storage = var.disk_size2 > 0 ? [var.disk_size1, var.disk_size2] :
[var.disk_size1]
}
source "vsphere-iso" "basic-ubuntu" {
// use a dynamic block to create the storage blocks based off your
storage variable
dynamic "storage" {
for_each = local.storage
content {
disk_size = storage.value
}
}
```
On Tue, May 25, 2021 at 7:04 PM Dan Linder <[email protected]> wrote:
> I'd like to present a single HCL2 Packer template to build some systems
> but I need to vary the number of "storage {}" sections, only provisioning a
> second disk if the "disk_size" setting for the second one is "> 0".
>
> Does HCL2 have any "if" clauses, or if not is there a way using HCL2 to do
> this, or do I need to re-write my calling script to modify the HCL2 file
> before sending it to Packer?
>
> Example:
> I define the variables "root_disk_size" and "additional_disk_size", and
> the builder section has two "storage {}" sections:
>
> storage {
> disk_size = var.root_disk_size
> }
>
> storage {
> disk_size = var.additional_disk_size
> }
>
> Is it possible to wrap the second section in a test something like "if
> var.additional_disk_size
> > 0"?
>
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