I have been working on a feature that depends on an external source for some data. The data file has to be built in a different system and essentially vendored into this one.
Elixir has a way of noting inside of a module that it depends on that external resource. Doing that allows tools to have insight on the dependency. For instance, when the module tagging the external resource is compiled, the external resource may be compiled as well.
defmodule App.SomeModule do @external_resource Path.join("src", "filename.ex") ... end `@external_resource` expects a path in the form of a binary.