Duplicate Dependency Labels

duplicate-dependency-labels strict control

Declaring two dependency blocks with the same label in one terragrunt.hcl configuration file parsed without error, and then quietly resolved every reference to that label to whichever block came last. The blocks before it were silently overridden:

dependency "vpc" {
  config_path = "../vpc-us-east-1"
}

dependency "vpc" {
  config_path = "../vpc-us-west-2"
}

inputs = {
  # Reads ../vpc-us-west-2.
  vpc_id = dependency.vpc.outputs.vpc_id
}

Terragrunt now warns when it finds this. With the new duplicate-dependency-labels strict control enabled, the warning becomes an error naming the address the blocks share:

terragrunt run plan --strict-control duplicate-dependency-labels

/path/to/terragrunt.hcl: dependency vpc is declared more than once; every dependency needs an address of its own

Give each block a label of its own. A configuration that was relying on the shadowing to pick the last block should keep only that block.