Run tflint on *.hcl files

[gdsotirov]

Introduction

Tflint is capable of verifying *.hcl files (e.g. Terragrunt configurations), but currently I have to rename these to *.tf, which is inconvenient. It would be nice if I'm able to run tflint also on *.hcl files with some argument.

Proposal

Allow checking of *.hcl files with an argument (e.g. --hcl or --check-hcl).

[bendrucker]

See #1860, particularly my latest comment. We're not moving forward with that proposal to just hack on handling based on the .hcl extension. But there is potentially room for a new plugin API for loading arbitrary HCL files. Although at that point, it's probably just a better idea to provide an API for loading entirely arbitrary files as []byte. Plugin authors can just parse the HCL themselves.

[gdsotirov]

Thanks for referring #1860, because it seems to address exactly the raw need. My point is that just renaming .hcl to .tf basically works - I've cleansed many Terragrunt configurations like this. Anyway, I understand your reasons, because although both .hcl and .tf are using the same syntax (of HashiCorp/Terraform configuration language) their structure (blocks and attributes) are not the same and .hcl files do not compose Terraform modules. Let's hope a plugin for .hcl files would appear in future. :-)