Model Preprocessing

[jfrost-mo]

What problem does your feature request solve?

Often times something needs to be applied to all of the model data before it is processed, such as cutting out a region, or fixing something. There is no easy way to do this currently, as modifying a recipe won't allow it to be done per-model.

Describe the solution you'd like

Add a pre-processing step to the workflow that can optionally run a user defined recipe to prepare the data, per model.

Describe alternatives you've considered

Build logic into the recipes, so it can be done conditionally. While powerful this would vastly increase the complexity of the recipes, making them less reliable and harder to reason about.

[jfrost-mo]

Do we want this as a recipe, or an arbitrary python script?