[DevOps] Terraform Apply workflows should be skipped if Plan doesn't have changes.

[ndouglas]

Description

Just saves time.

Tasks

• [ ] [DevOps] Determine the most reliable way of seeing whether Plan has meaningful changes.
• [ ] [DevOps] Implement this in the relevant workflows.

Acceptance Criteria

• [ ] Apply actions are not attempted when Plan is empty.

[ndouglas]

This is hard because Terragrunt doesn't support the detailed exit codes that Terraform can return. It's a nice-to-have but unless that changes upstream, there's unlikely to be much we can do about this that doesn't increase fragility.

[ndouglas]

Or we can just plan xor apply. No reason to do both in the same operation.