IndexError: list index out of range (Convert CloudFormation Template to Terraform)

[shawnhankim]

Issues:

$ cf2tf cloudformation-template.yaml -o tf

// Converting cloudformation-template.yaml to Terraform!
// Existing Terraform src code found at /var/folders/jj/2yn5ym4j2wj892zt7r_9z6q00000gn/T/terraform_src.
Traceback (most recent call last):
  File "/Users/dev/.pyenv/versions/3.12.4/bin/cf2tf", line 8, in <module>
    sys.exit(cli())
             ^^^^^
  File "/Users/dev/.local/lib/python3.12/site-packages/click/core.py", line 1157, in __call__
    return self.main(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.local/lib/python3.12/site-packages/click/core.py", line 1078, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "/Users/dev/.local/lib/python3.12/site-packages/click/core.py", line 1434, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.local/lib/python3.12/site-packages/click/core.py", line 783, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.pyenv/versions/3.12.4/lib/python3.12/site-packages/cf2tf/app.py", line 44, in cli
    config = TemplateConverter(tmpl_path.stem, cf_template, search_manger).convert()
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.pyenv/versions/3.12.4/lib/python3.12/site-packages/cf2tf/convert.py", line 97, in convert
    tf_resources = self.convert_to_tf(self.manifest)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.pyenv/versions/3.12.4/lib/python3.12/site-packages/cf2tf/convert.py", line 144, in convert_to_tf
    tf_resources.extend(converter(resources))
                        ^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.pyenv/versions/3.12.4/lib/python3.12/site-packages/cf2tf/convert.py", line 352, in convert_resources
    overrided_values = perform_global_overrides(
                       ^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.pyenv/versions/3.12.4/lib/python3.12/site-packages/cf2tf/convert.py", line 645, in perform_global_overrides
    params = override(tc, params)
             ^^^^^^^^^^^^^^^^^^^^
  File "/Users/dev/.pyenv/versions/3.12.4/lib/python3.12/site-packages/cf2tf/conversion/overrides.py", line 55, in tag_conversion
    first_item = original_tags[0]
                 ~~~~~~~~~~~~~^^^
IndexError: list index out of range

[rowlinsonmike]

@shawnhankim this traceback is related to your cloudformation yaml having a Tags property with an empty list. You could omit the Tags property altogether from your cloudformation, change the Tags property to be a dictionary {}, or add at least one key value pair to the empty list.

this is bad

Tags: []

these work

Tags:{}  # this works bc of line 50 in overrides.py

# OR

Tags:
  - Key: Name
    Value: mytable

[shawnhankim]

@rowlinsonmike :

• Thanks for your feedback.
• The template is generated by CloudFormation so I am wondering if it is a bug from AWS.

[shadycuz]

@shawnhankim Thanks for reporting this. Did you get this template from an official AWS source? If so, we could support this. But I agree with @rowlinsonmike, that tags are usually done with a list with -.

[shawnhankim]

@shadycuz Thanks for your feedback and question. Yes, I directly generated the template in the AWS CloudFormation Console.

[shahruk]

I was also encountering this issue on a brand new AWS account where I am using AWS Organizations. I've opened #345 to resolve this issue.