Lockfile Readonly

Respect -lockfile=readonly during provider caching

When you pass -lockfile=readonly to init, Terragrunt no longer generates or updates .terraform.lock.hcl while warming the provider cache. Previously the cache step could write the lock file before OpenTofu/Terraform ran, so the read-only check always passed and silently defeated the flag.

Terragrunt now leaves the lock file untouched and lets OpenTofu/Terraform enforce it, failing when the lock file is missing or incomplete. The flag is honored whether it is supplied on the command line or through the TF_CLI_ARGS or TF_CLI_ARGS_init environment variables.