Skip unneeded steps

[torarnv]

Without a communicator we can't provision, and if we don't have
boot commands there's not any keys to send to the running VM, so
running it is not needed.

This allows configuring builders that only create the VM,
in preparation for later OS installation and provisioning:

source "tart-cli" "create-only" {
  cpu_count    = 4
  memory_gb    = 8
  disk_size_gb = 40
  from_ipsw    = var.ipsw_file
  vm_name      = "pre-install-vm"
  communicator = "none"
}

Also, there's no need to connect to VNC if we have no boot commands
to type.

[fkorotkov]

Great optimization! One nit pick from me. Do you mind extracting b.config.CommunicatorConfig.Type != "none" into a variable like communicatorConfigured. I think it will cleaner to read the code. What do you think?

[torarnv]

Thanks!

Do you mind extracting b.config.CommunicatorConfig.Type != "none" into a variable like communicatorConfigured. I think it will cleaner to read the code. What do you think?

Absolutely, will push :)

[torarnv]

Pushed update :)

[torarnv]

Doh, missed the second one :D

[torarnv]

Like this?