Imported TypeScript files in ``eslint.config.ts`` doesn't work

[ferferga]

The following structure is publicily available at https://github.com/jellyfin/jellyfin-vue

Steps to reproduce

1. Click on Code > Create codespace from master (or clone the repository locally)
2. cd frontend && npm run lint:inspect

Description

This an overview of the setup

• Using TypeScript configuration files with jiti v2. Looks like that is already covered
• A monorepo (called @jellyfin-vue/configs in my case) where TypeScript modules export factory functions for rule configs.
• Those factory functions are imported in frontend/eslint.config.ts, working perfectly with ESLint but not with the inspector.

[voxpelli]

I have a hard time understanding what it is that doesn’t work.

Can you maybe add a screenshot or something where you show what’s wrong or missing?

[ferferga]

@voxpelli I was able to better triage the issue and create a minimal reproduction: https://stackblitz.com/edit/vitejs-vite-9abzaz

Steps to reproduce

1. cd packages/configs and run npm run lint:inspect
2. ESLint config inspector will load successfully, since the TypeScript file imported is referenced from the same project
3. Change to the packages/main directory and run npm run lint:inspect there. The config inspector will fail to load with the following error, since the base rules are being imported from the monorepo:

Additional context

It looks like the issue exists when importing .ts files from node_modules in monorepo setups. Similar to what happens in Vite. Hence, the workarounds listed there are also applicable to this project