live/terragrunt.stack.hcl

stack-dependencies: Multi-level nested stack.<name>.<nested_stack>.path references

The stack-dependencies experiment already supported stack.<name>.path (a whole stack) and stack.<name>.<unit_name>.path (a unit inside a stack). It now also resolves references where the second segment is itself a nested stack, so an autoinclude block in a parent stack can target a stack that lives inside another stack:

# live/terragrunt.stack.hcl
stack "infra" {
  source = "../catalog/stacks/infra"
  path   = "infra"
}

unit "app" {
  source = "../catalog/units/app"
  path   = "app"

  autoinclude {
    dependency "deep" {
      config_path = stack.infra.deep.path
    }
  }
}

Here stack.infra.deep.path resolves to the generated directory of a stack "deep" block declared inside catalog/stacks/infra/terragrunt.stack.hcl. This makes deeper stack hierarchies addressable from a single dependency expression without flattening the layout.