How to know which backend I am using during runtime?

[vliao-semios]

Current Terraform Version

Terraform v0.12.9
+ provider.aws v2.30.0

Use-cases

I'd like to set module.source value according to the backend configured. E.g. when using remote backend, I want it to use source in github.com, otherwise, just use local source.

Attempted Solutions

Try to use a ... ? ... : ... statement, but can not find where to read the backend configuration in the config file.

Proposal

Add backend configuration in the state file.

References