support offline provider package mirrors

[pfeifferj]

SUMMARY

terraform init will, by default, attempt to query provider packages from registry.terraform.io.

It would be useful for airgapped systems to have a native way to use local mirrors. Right now, this is possible with a workaround by adding a .terraformrc & local tf_cache to the repo. However, this does go against recommended best practices.

ISSUE TYPE

• Feature Idea

COMPONENT NAME

offline provider packages

ADDITIONAL INFORMATION