Inputs that are conditionally skipped

[drevell]

TL;DR

Sometimes, one input is unnecessary, depending on the value of another input. For example, you might have two inputs use_postgres, and postgres_config_file; if use_postgres is false then you don't care about postgres_config_file.

One way this could look: we could add a CEL expression skip_if to each input. For example:

inputs:
  - name: use_postgres
  - name: postgres_config_file
    default: 'postgres.conf'
    skip_if: '!bool(use_postgres)'

cc @gjonathanhong

[tyroneclay]

Unable to prioritize until recently. WIP. Code complete end of next week.