Question

A team member defines the following in their configuration:

variable "environment" {
  default = "prod"
}

locals {
  base_tags = {
    Owner   = "platform"
    Managed = "terraform"
  }
  final_tags = merge(local.base_tags, { Environment = var.environment })
}

What is the resulting value of local.final_tags?

Accepted Answer

{ Owner = "platform", Managed = "terraform", Environment = "prod" }

Answer

{ Owner = "platform", Managed = "terraform" } (the second argument is ignored because base_tags is defined first)

Answer

{ Environment = "prod" } (merge replaces the entire first map with the last argument)

Answer

An error, because merge() requires all maps to contain identical keys