terraform-module-vms/inventory.tf

locals {
  vm_hosts_with_groups = {
    for hostname, host in var.vm_hosts: hostname => host if contains(keys(host),"groups")
  }
  vm_hosts_without_groups = {
    for hostname, host in var.vm_hosts: hostname => host if !contains(keys(host),"groups")
  }
  vm_groups = distinct(flatten(values(local.hetzner_vm_hosts_with_groups)[*].groups))
}