[package/rolldown] Emit types by bundling

[hyf0]

          This PR solve another problem related unbundled-dts. We have met some many of them and use many workaround now.

This is not ideal. Let's try to solve it in the best suitable way. We should either use rollup-plugin-dts or https://github.com/Rich-Harris/dts-buddy to generate bundled dts files.

Originally posted by @hyf0 in #1387 (comment)

[Boshen]

We are prototyping dts transform with --isolatedDeclarations in oxc, stay tuned.

But you still need another plugin if you want normal dts emit :-(

[hyf0]

We gonna wait for #1396 to be supported.

[Kocal]

Hi, is this something that's always planned?

At Symfony UX we use Rollup with the typescript plugin to emit types when building our .ts files, but we'd like to migrate to Rolldown to reduce build time.

Is there anything we can do to help?

Thanks!

EDIT: While playing with Rolldown on symfony/stimulus-bridge#99, I found out that it was still possible to emit types while bundling by using @rollup/plugin-typescript.

[David-van-der-Sluijs]

While playing with Rolldown on symfony/stimulus-bridge#99, I found out that it was still possible to emit types while bundling by using @rollup/plugin-typescript.

I figured that out too but noticed that the build times are significantly higher because it is using the official typescript compiler instead of the fast oxidation compiler rolldown would be using.

[sxzz]

https://github.com/sxzz/rolldown-plugin-dts is now pretty stable and will soon be integrated as a built-in plugin.