How do I used the "enabled" argument for "dependency" blocks?

[nshenry03]

Hello, I'm trying to use the "enabled" argument for dependency blocks; however, it doesn't seem to be working as I would think it should work...

I have the following code:

...

dependency "custom_flows" {
  config_path = "../custom-flows"
  # enabled     = local.create_default_gitlab_project
  enabled     = false
}

...

inputs = {

...

  items = merge(

    ...

    local.create_default_gitlab_project ? {
      gitlab = {
        ...

        custom_flow_id = dependency.custom_flows.outputs.wrapper["gitlab"]["id"]

        ...
      }
    } : {},

    ...

  )
}

Now when I run Terragrunt, I expect that since enabled = false, it shouldn't even try to run the dependency block:

When false, excludes the dependency from execution.

However, I'm getting the following error:

$ terragrunt plan
ERRO[0000] Error reading file at path /Users/hnicholas/Repositories/terraform/deployments/edgeops/backend-prod/ap-southeast-1/env0/custom-flows: open /Users/hnicholas/Repositories/terraform/deployments/edgeops/backend-prod/ap-southeast-1/env0/custom-flows: no such file or directory 
ERRO[0000] Unable to determine underlying exit code, so Terragrunt will exit with error code 1 

---

Tracked in ticket #110607

[nshenry03]

Workaround

I was able to find a workaround that worked for us. I'd still love to know the RIGHT way to do this or if this is a bug?

...

dependency "custom_flows" {
  # Well this is dumb, but I think it works?
  #
  # The "enabled" feature doesn't work as one would hope it would. If I set
  # "enabled" to false and I don't have a config_path that exists, I get this
  # error:
  #   ERRO[0000] Error reading file at path .../custom-flows: open
  #              .../custom-flows: no such file or directory
  #   ERRO[0000] Unable to determine underlying exit code, so Terragrunt will exit
  #              with error code 1
  #
  # To move on, and avoid this error, I simply set "config_path" to something
  # that DOES exist for every environment. Then, at this point, this dependency
  # isn't used (or if it is, it doesn't matter except for maybe it takes longer
  # / uses more data ¯\_(ツ)_/¯)
  #
  # NOTE: the config_path needs to be an environment that doesn't depend on this
  # environment, otherwise, you will have a dependency cycle between the modules
  config_path = local.create_default_gitlab_project ? "../custom-flows" : "../projects-region-level"
  enabled     = local.create_default_gitlab_project
}

...

# This was already a dependency for these environments so using this
# config_path made as much sense as anything else I could have used
dependency "projects_region_level" {
  config_path = "../projects-region-level"
}

...

inputs = {

...

  items = merge(

    ...

    local.create_default_gitlab_project ? {
      gitlab = {
        ...

        custom_flow_id = dependency.custom_flows.outputs.wrapper["gitlab"]["id"]

        ...
      }
    } : {},

    ...

  )
}

[denis256]

Hm, looks like a bug
But it is not clear which version of Terragrunt was used