terraform Allow variables in lifecycle block

Current Terraform Version

Terraform v0.12.28

Use-cases

I have a resource that gets deployed in a module. I want to allow the lifecycle of that resource to be determined by a variable provided to the module.

Attempted Solutions

This is the original attempt

lifecycle {
    prevent_destroy = var.hns_enabled == true ? true : false
  }

I also tried moving this up to a local and then using the local in the lifecycle block

locals {
  prevent_destroy = var.hns_enabled == true ? true : false
}

resource "" "" {
  lifecycle {
    prevent_destroy = local.prevent_destroy
  }
}

References

This is the same request #3116 from 2015 but that issues appears to have been left open and then closed from contribution from the public. The last activity was in 2018.

Jul 09 '20 17:07 jgardner04

I would support this request as well. Would be good to get it working within a for_each

resource "azurerm_key_vault_secret" "secret" {
  for_each = try(var.keyvault.secrets, {})

  name            = each.value.name
  value           = try(each.value.is_value_filepath, false) ? base64encode(file(each.value.value)) : each.value.value
  key_vault_id    = azurerm_key_vault.keyvault.id
  content_type    = try(each.value.content_type, null)
  not_before_date = try(each.value.not_before_date, null)
  expiration_date = try(each.value.expiration_date, null)
  tags            = try(each.value.tags, null)

  lifecycle {
      ignore_changes = each.value.lifecycle.ignore_changes
  }
}