TF test

gistfile1.txt

$ terraform apply                                                                                                                                                                            (:|✔) 0

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

test = {
  ex1 = I want the project id to be here: my-project
  ex2 = And one more time: my-project
}

$ $terraform apply -var 'exclusions={ ex1 = "foo", ex2 = "bar" }'                                                                                                                             (:|✔) 0

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

test = {
  ex1 = foo
  ex2 = bar
}

main.tf

variable "project_id" {
  default = "my-project"
}

variable "exclusions" {
  type = "map"
  default = {}
}

locals {
  default_exclusions = {
    "ex1" = "I want the project id to be here: ${var.project_id}",
    "ex2" = "And one more time: ${var.project_id}"
  }

  # This is ugly, because TF does not allow to have maps in conditinalsn (Why? :()
  exclusions_keys = "${length(keys(var.exclusions)) != 0 ? join(",", keys(var.exclusions)) : join(",", keys(local.default_exclusions))}"
  exclusions_values = "${length(keys(var.exclusions)) != 0 ? join(",", values(var.exclusions)) : join(",", values(local.default_exclusions))}"
  exclusions = "${zipmap(split(",", local.exclusions_keys), split(",", local.exclusions_values))}"
}

output "test" {
  value = "${local.exclusions}"
}