iam_role arn pulled from dependency broken

[awiesner4]

It looks like there was a conscious decision to change the parsing for iam_role here: #1807

However, this has lead to breaking existing terragrunt functionality where we would create global IAM roles for a particular environment/account, and then use dependencies to pull in the arns like so:

dependency "iam" {
  config_path = "../../../../../../global/iam"
}

iam_role = dependency.iam.outputs.eks_admin_role_arn

When running with v0.31.5, this works without issue. It now no longer works and I get the following error when running with newer versions:

ERRO[0000] /Users/awiesner/git-v2/ego-infra/aws/prod/us-east-2/tp/az-a/vpc1/tp0/eks/terragrunt.hcl:57,12-22: Unknown variable; There is no variable named "dependency"., and 1 other diagnostic(s) 
ERRO[0000] Unable to determine underlying exit code, so Terragrunt will exit with error code 1 

[yorinasub17]

This is unfortunately a side effect of fixing another bug with iam_role. I'm a bit buried with other initiatives right now, but I'll be taking a look to see if there is a way to make this use case work. For now, I recommend using the older version that works for you, or looking to alternative means of getting that IAM role ARN.

FWIW, I think this is another evidence point for #1840

[awiesner4]

Thank you, @yorinasub17 . Understood completely. We're going to stay with our older version for now, and will also explore other ways of dynamically building the iam_role arn.