Inlining the string result of a function call which uses fs during transpilation

[janus-reith]

I'm trying to find out how to inline calls to a function called importAsString, which makes use of fs.readFileSync (and callsite to get which file called it to resolve the path) so it is replaced with the actual result string during transpilation.
https://github.com/reactioncommerce/api-utils/blob/trunk/lib/importAsString.js

That importAsString function is imported across other modules, which in turn I am importing in some next.js api routes.
For example: https://github.com/reactioncommerce/api-plugin-shops/blob/a44fe9cccf958a3a552ce25e1602d1b1e0b00e84/src/schemas/index.js#L3
The current webpack configuration I have in a nextjs project will inline that importAsString method, but the files it tries to import won't be present, and can't be found anymore as they were relative to the function calling it.
I'm trying to find out how I could utilize babel to directly read the files and inline them as strings everywhere importAsString is used.
So far I had no luck with babel-plugin-static-fs or brfs-babel, I assume that is because fs.readFileSync is not used directly, but inside some function of a module, so it can't be statically replaced.
Therefore, instead of diving into that logic, I was considering to just replace that importAsString function call altogether with the resulting string, similar to how babel-plugin-static-fs replaces calls to fs.readFileSync with inlined strings.
Except if someone might know another approach for this which I could use instead to retain that proper reference?

Would appreciate any hints or ideas on how to accomplish this, or which alternatives to consider!

[nicolo-ribaudo]

You might try babel-plugin-preval: it allows you to evaluate some code at compile time rather than at runtime.

[janus-reith]

Thanks @nicolo-ribaudo, it seems to go into a similar direction, but if I understood correctly, it won't work for the importAsString function calls inside the other modules I import, which I don't intend do alter directly.
Instead, I'm currently writing a custom babel plugin to solve this instead.