Terragrunt: New interpolation function for plan files

[dmlemos]

After adapting the scripts to use plan files, I noticed that I can no longer use this function get_terraform_commands_that_need_vars(). The apply command doesn't take var parameters when using the plan file.

Instead of listing all the commands in all the tfvars files, I would prefer to continue to use the portability of a function.

I'd like to ask for an additional function that includes commands that need vars, except apply.
get_terraform_commands_that_need_vars_for_planfile()

[brikis98]

Seems reasonable. Another alternative is to have a more general-purpose helper along the lines of filter or exclude:

exclude(get_terraform_commands_that_need_vars(), ["apply"])

PRs welcome :)

[dmlemos]

That would be beneficial too 👍

[ricoli]

In my view the ideal scenario would be that the existing function get_terraform_commands_that_need_vars would return two different lists of commands, depending on whether a plan file is being applied or not. Therefore, apply would be included in the returned list of commands if no plan file is being applied, and excluded otherwise.