func ParseVMSSResourceID()

in cmd/utils/vmss.go [53:77]

• 16 lines of code
• 3 McCabe index (conditional complexity)

func ParseVMSSResourceID(id string, vm *VirtualMachineScaleSetVM) error {
	const expectedItems int = 5

	// This allows us to make resource ID (--id) option not case sentitive
	id = strings.ToLower(id)

	// Required because fmt.Sscanf expects space-separated values
	idWithSpaces := strings.TrimSpace(strings.Replace(id, "/", " ", -1))

	// We don't need the provider but fmt.Sscanf does not support "%*s" operator
	// to read but prevent conversion. Therefore, read it and don't use it.
	var provider string

	n, err := fmt.Sscanf(idWithSpaces, "subscriptions %s resourcegroups %s providers %s virtualmachinescalesets %s virtualmachines %s",
		&vm.SubscriptionID, &vm.NodeResourceGroup, &provider, &vm.VMScaleSet, &vm.InstanceID)
	if err != nil {
		return fmt.Errorf("error parsing provider ID %q: %w", id, err)
	}
	if n != expectedItems {
		return fmt.Errorf("%d values retrieved while expecting %d when parsing id %s",
			n, expectedItems, id)
	}

	return nil
}