This will show a warning (or error with strict control enabled)

Throw an error when using the deprecated --hidden flag.

deprecated-hidden-flag - Reason

Hidden directories are now included by default in find and list command results. The --hidden flag is no longer needed and has been deprecated. Use --no-hidden if you need to exclude hidden directories.

deprecated-hidden-flag - Example

# This will show a warning (or error with strict control enabled)
$ terragrunt find --hidden
WARN  The `--hidden` flag is deprecated and will be removed in a future version of Terragrunt. Hidden directories are now included by default. Use `--no-hidden` to exclude them.