@adapter-netlify: copying data files into generated function

[infovore]

I've got a static site with a relatively middling number of pages (around 3k to 10k pages depending on how you slice it). To handle the long tail of content - not to mention generation time - I prerender about 3k of these pages, and the rest are left as dynamic.

For development, I just query markdown files on disk; in production, I query single, large JSON files.

I'm looking at deploying the site to Netlify; my build command runs npm run build and then generates the precalculated JSON. I'd like to include this JSON in the generated Netlify functions.

I've generated this file in ./data/foo.json; in my netlify.toml I've included:

[functions]
  included_files = ["data/**/*.json"]

and finally, in my library code, I've included:

const allFooObjects = JSON.parse(readFileSync('../data/foo.json').toString())

and yet the function, in the production environment, errors out because it's unable to find the file.

I can't tell if this is a Netlify issue or an adapter-netlify issue; I note that the adapter builds everything into .netlify/functions-internal, which is not a directory I've encountered in any publicly visible documentation. I've tried copying this JSON file everywhere, and with no joy. Any thoughts?

[infovore]

Ignore me:

• that line in the TOML config can't take a glob, I don't think
• I have more problems that are unrelated, but that can be summarised so far by "Netlify functions really like doing small things."