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Description
Terragrunt copies lock files into the working directory every time Terraform is initialized. This is inconsistent with the Terraform behaviour where the lock file is only written to when changed.
This is important when the working directory is on a readonly filesystem. I work with an organization that does this to prevent unintentional code changes during provisioning.
This PR makes it so that copying the lock file is avoided when the file has no changes.
TODOs
Read the Gruntwork contribution guidelines.
Release Notes (draft)
Added / Removed / Updated [X].
Updated the lock file copy mechanism to avoid copying when the lock file is unchanged. Useful for using a readonly working directory.