TypeScript compiling not working without ember-cli-typescript in Ember 5 about ember-engines HOT 5 CLOSED

@aklkv I have come up with a minimal project demo to outline what I'm talking about if you would not mind checking it out.

The repo: https://github.com/LucasHillDex/engine-typescript

It has two branches.

In the 'main' branch: A simple ember addon, version 5.4. There is a single Typescript component called Header, which is used in the dummy application.hbs
The TypeScript is being compiled without ember-cli-typescript via the guide which is most importantly configured in the index.js of the addon. In this branch all is happy and the component is rendering.

In the branch 'engine' I have added ember-engines and the necessary configuration. Now, the app is no longer able to lookup the 'Header' component, mostly likely due to the TypeScript compilation no longer happening. I wonder if in the index.js
, the 'buildEngine' function is not passing the needed config to ember-cli-babel, but just a theory.

I think considering this is the supported way of using TypeScript in ember going forward that this is a real issue and something worth investigating.

Thank you!

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@aklkv Thank you!! That was the issue.

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@LucasHillDex could you please add a bit more details, on what exactly doesn't work?

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@LucasHillDex could you please add a bit more details, on what exactly doesn't work?

@aklkv Yes, we have followed the migration guide for getting Typescript compiling in ember without ember-cli-typescript. https://guides.emberjs.com/release/typescript/application-development/converting-an-app/#toc_manually-enable-typescript-transpilation

This involves passing the above mentioned option to ember-cli-babel in the apps/addons build config. This migration has worked in all of our apps and addons except for the one using ember-engines. In that addon none of the typescript files can be found by the module loader at run time. My suspicion is this is due to the addon's index.js build file being different for an ember-engine, where the exported object extends an EngineAddon, perhaps the ember-cli-babel config is not being used or is overriden.

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@LucasHillDex I have been able to run your repro with a small correction refer to engines section here

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