"list" function was deprecated in Terraform v0.12 and is no longer available

[Nightbr]

Hello,

thanks for all your Terraform modules 👌

Describe the Bug

Seems there is a change in come function Terraform handles. It was a warning but now if you upgrade to tf 0.15.0 it will throw an error.

╷
│ Error: Error in function call
│ 
│   on .terraform/modules/eks_workers.autoscale_group/main.tf line 14, in resource "aws_launch_template" "default":
│   14:         for_each = flatten(list(lookup(block_device_mappings.value, "ebs", [])))
│     ├────────────────
│     │ block_device_mappings.value will be known only after apply
│ 
│ Call to function "list" failed: the "list" function was deprecated in Terraform v0.12 and is no longer available; use tolist([ ... ]) syntax to write a literal list.

Expected Behavior

We should handle properly new terraform function such as tolist instead of legacy list function:

https://www.terraform.io/docs/language/functions/list.html

Steps to Reproduce

Steps to reproduce the behavior:

1. Go to '...'
2. Run '....'
3. Enter '....'
4. See error

Screenshots

Environment (please complete the following information):

• OS: Linux Mint (ubuntu base)
• Version terraform v0.15.0

Additional Context

Here my fix:
for_each = flatten(tolist([lookup(block_device_mappings.value, "ebs", [])]))

Seems to work so far.

Related cloudposse/terraform-aws-ec2-autoscale-group#64

Feel free to ask me anything to help tackle this 👌

[Nuru]

Closed by #67