fix: Fixed output when create_api_domain_name is false

[mike-carey]

Description

When disabling the entire module by:

• Setting create = false
• Not setting create_api_domain_name = false, the outputs cause a plan time error.

Error:

Error: Error in function call

  on .terraform/modules/environment.maintenance.this.apigateway.this/outputs.tf line 70, in output "apigatewayv2_domain_name_target_domain_name":
  70:   value       = var.create_api_domain_name ? lookup(tomap(element(element(concat(aws_apigatewayv2_domain_name.this.*.domain_name_configuration, [""]), 0), 0)), "target_domain_name", "") : ""
    |----------------
    | aws_apigatewayv2_domain_name.this is empty tuple

Call to function "element" failed: cannot read elements from string.

Error: Error in function call

  on .terraform/modules/environment.maintenance.this.apigateway.this/outputs.tf line 75, in output "apigatewayv2_domain_name_hosted_zone_id":
  75:   value       = var.create_api_domain_name ? lookup(tomap(element(element(concat(aws_apigatewayv2_domain_name.this.*.domain_name_configuration, [""]), 0), 0)), "hosted_zone_id", "") : ""
    |----------------
    | aws_apigatewayv2_domain_name.this is empty tuple

Call to function "element" failed: cannot read elements from string.

Motivation and Context

We would like to disable the module.

Breaking Changes

No

How Has This Been Tested?

• [x] I have tested and validated these changes using one or more of the provided examples/* projects

Yes, this is to get it to plan properly.

[tfrigini]

Hi, do you have some plan to merge this fix? I'm running into the same problem and done the same fix locally, I came here to check if this problem wasn't seen by anyone to send a fix, but you already had an PR opened.

[antonbabenko]

Thanks for the PR and nudge. :)

I have updated the code to use Terraform 0.13 and try().

v1.3.0 has been just released.

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