Require a configured state backend

[nitrocode]

It would be nice to prevent plan/apply if a remote backend is not configured

e.g. terraform_backend_required

# this should prevent tflint from flagging the code
terraform {
  backend "s3" {
    bucket = "mybucket"
    key    = "path/to/my/key"
    region = "us-east-1"
  }
}

# this should raise an error from tflint
terraform {}

Edit: unsure if this is the right place to request this feature request. From the discussion in #22 (comment) it appears that these new types of rules may be more likely to be added in a separate tflint-ruleset-policy repo (not created yet) ?

Our workaround for now is to use rego

Edit2: i found a nice easy using rego and conftest

https://github.com/nitrocode/atlantis-terraform-module/blob/d6d2bf74dff3c30b52232f1edd57dca0251be750/repos.yaml#L60-L64

https://github.com/nitrocode/atlantis-terraform-module/blob/d6d2bf74dff3c30b52232f1edd57dca0251be750/repos.yaml#L60-L64

[bendrucker]

Yeah this is probably not the appropriate place for a rule like this. To be honest the policy repo is more of a discussion placeholder than an actual plan. The issue with all these usage convention rulesets is that it becomes a collection of opinions. The cost of moderating that is high and not something I'm willing to take on personally. I'd rather see a proliferation of community-based rulesets and then see if there's an opportunity to curate a larger set of this type of rule.