Add support for CloudFormation

[delissonjunio]

Hi, is there any chance we could work to support bare CloudFormation templates? At my company we don't really use TF but I'd be interested in contributing & adding support to CF if it fits within the project's scope

Note for community

Please 👍 if you'd like to upvote this or receive updates.

[joetheone]

Yes please! 🙌

[PatMyron]

CloudFormation has a limited coverage API:
aws-cloudformation/cloudformation-coverage-roadmap#217
Reach out if anyone's planning on this. Can point towards CloudFormation template recognition logic, unresolved CloudFormation template syntax that'll likely need to be ignored, diverse test templates, and other thoughts like hooks integration

[PatMyron]

Easiest starting point is automatically translating free resource types:

infracost/internal/providers/terraform/aws/registry.go

Line 102 in 8e854e6

var FreeResources = []string{

Stripping delimiters (_ or ::) and comparing case insensitively automatically maps ~400 out of ~900 AWS resource types:
https://github.com/PatMyron/terraformation/blob/main/map/map.py
https://github.com/PatMyron/terraformation/blob/create-pull-request/patch/map/resources.txt

---

which currently automatically maps 100 of 280 free resource types identified by infracost

---

https://github.com/hashicorp/terraform-provider-awscc might be another good starting point

[tim775]

Note: When we add CloudFormation IaC support, we should generate estimates for the template_body field of aws_cloudformation_stack (see #1507)

[DavidHaasz]

Do we have an update on the status of this. My team currently has a mix of Terraform and Cloudformation IaC and we are looking to do something around comparing estimated cost of infrastructure vs real cost of infrastructure and we would like to leverage Infracost to do that but the current lack of cloudformation support is a blocker

[hugorut]

@DavidHaasz we're still focused on making the experience for Terraform the best it can possibly be, e.g. guardrails, tagging policies and finops policies. Once we're happy with the features for Terraform, we'd like to go broad and provide the same capabilities to other IaC tools. Sorry, we don't have an ETA yet for Cloudformation support.

[jswietek]

@hugorut Did anything change in that matter? Do you have a roadmap/ETA of features that need to be in place for Terraform before you switch focus to other IaC tools? Do you already thought about which other IaC tool si going to be first after Terraform?

[hugorut]

@jswietek it hasn't changed as of recent, we're still focused on Terraform. When we have a roadmap/ETA we will post here for visibility. Thanks.