Simple script evaluation failure repro

Context

This repo is a basic prototype for a user-script runtime environment.

There are some basic differences in the way it works:

• all scripts are stored and loaded from the database into memory and executed
• all scripts must be expressed as default exports from the module

  export default mainscript() {
      return "Hello world"
  }

• scripts make use of the helper library (modelled as ./script-api.ts in here) that helps them to quickly scaffold the required return objects and provides some default values

Note

The script runtime supports TypeScript directly and as such a custom module loader is implemented in src/module_loader.rs

Problem:

Scripts are loaded in the src/evaluator.rs module using the .load_main_es_module_from_code(&specifier, code) function. However using it as such the main loaded module is not transpiled, resulting in a runtime error as the JsRuntime attempts to evaluate a non-JS module. The helper module ./script-api.ts gets transpiled correctly, however.

It is therefore unclear what happens with the main module code when using .load_main_es_module_from_code (or .load_main_es_module) methods.

To repro:

1. Clone the repo
2. Run cargo run pass and see the ./script-pass.ts module evaluate correctly. Notice in the stdout that only the ./script-api.ts gets passed through the ModuleLoader
3. Run cargo run fail and see the ./script-fail.ts module fail to evaluate with a runtime panic.