[chef] Defining dynamic global custom variables once for all recipes during chef run

[Mathew Crane < >]

Scenario:

- Two custom variables are dynamically assigned based on node.chef_environment via a targeted search and subsequent for-loop against a max of 10 top-level data bag items.

- Both variables are a DataBagItem.

- They are defined within any recipe that needs these values. 

- Setting this in every recipe doesn't scale.

Is there a way to define these variables once in a separate, single-purpose cookbook recipe, and have them reliably made available to all recipes within the chef run?

What is the best direction for this? Setting attributes via attributes/default.rb or creating a custom library with a ruby block?

Thanks!

-Mat