Dynamic lifecycle ignore_changes?

Terraform
1

Hi,

Is it possible (with terraform 0.12) to have a dynamic ignore_changes in a lifecycle block?
What I’m hoping to achieve is to make ignoring changes to “user_data” optional in one of our modules.

I’ve tried variants of this:

lifecycle {
  ignore_changes = [<<-EOT
     tags.FQDN,
     tags.InstanceInfo,
     tags,
     var.extra_lifecycle_ignore
EOT
]

But get the error “A static list expression is required”.

I’ve also tried dynamic blocks but get the error “Unsupported block type … Blocks of type “lifecycle” are not expected here”

Kind regards,
Magnus

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