Improper stack config causes stack module to poorly exit terraform

[Gowiem]

Describe the Bug

This stack configuration:

import:
  - catalog/globals

vars:
  environment: automation

components:
  terraform:
    # account-settings:

causes this error:

Expected Behavior

I expect to get a runtime error that is useful in debugging what happened without enabling TF_LOG=1

Steps to Reproduce

Steps to reproduce the behavior:

1. Use the above stack configuration.
2. Pass it to the spacelift module or however else you consume terraform-yaml-stack-config
3. Try a plan
4. 💥

Screenshots

Here is the full error that I found after enabling TF_LOG:

[aknysh]

@Gowiem thanks for reporting this.
It's a known issue/feature.
We use a Go lib mergo which does not like declared but empty maps.

To fix that right now, use

components:
  terraform: {}

All maps that are empty, must be declared as {}.

Having said that, we'll look at how to improve the error handling without crashing the utils provider and terraform.

[Gowiem]

@aknysh Sounds good as long as we know about 👍

[aknysh]

I'll close this for now.
A lot of new features added in #39
We can reopen if the issue persists