`build` API does not work with JSON imports

[finom]

Reproduction link or steps

Open https://stackblitz.com/edit/rolldown-rolldown-starter-stackblitz-xruawaix?file=package.json,build.mjs and see the console.

I'm trying to bundle a simple import of a JSON file:

import openapi from './openapi.json' with { type: "json" };

export { openapi };

But get SyntaxError: Export '...' is not defined. when build function accepts dts: true.

What is expected?

No error.

Most likely, the problem comes from using an unstable latest version of rolldown, see #500

Using package.overrides with different versions of rolldown didn't help.

What is actually happening?

Error: Build failed with 1 error:

Error: SyntaxError: Export 'description_1' is not defined. (16:21)
    at napi_create_error (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+core@1.5.0/node_modules/@emnapi/core/dist/emnapi-core.cjs.js:4569:25)
    at callback (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+core@1.5.0/node_modules/@emnapi/core/dist/emnapi-core.cjs.js:3116:24)
    at NodeEnv.callIntoModule (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+runtime@1.5.0/node_modules/@emnapi/runtime/dist/emnapi.cjs.js:569:19)
    at BindingOutputs.eval (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+core@1.5.0/node_modules/@emnapi/core/dist/emnapi-core.cjs.js:3127:51)
    at handleOutputErrors (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2927:27)
    at transformToRollupOutput (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2922:2)
    at napi_create_error (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+core@1.5.0/node_modules/@emnapi/core/dist/emnapi-core.cjs.js:4569:25)
    at callback (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+core@1.5.0/node_modules/@emnapi/core/dist/emnapi-core.cjs.js:3116:24)
    at NodeEnv.callIntoModule (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+runtime@1.5.0/node_modules/@emnapi/runtime/dist/emnapi.cjs.js:569:19)
    at BindingOutputs.eval (/tmp/rolldown-1.0.0-beta.41/node_modules/.pnpm/@emnapi+core@1.5.0/node_modules/@emnapi/core/dist/emnapi-core.cjs.js:3127:51)
    at handleOutputErrors (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2927:27)
    at transformToRollupOutput (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2922:2)
    at normalizeErrors (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2193:18)
    at handleOutputErrors (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2928:34)
    at transformToRollupOutput (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:2922:2)
    at RolldownBuild.write (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:4129:10)
    at async Module.build (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/rolldown@1.0.0-beta.41/node_modules/rolldown/dist/shared/src-DkvlJJsC.mjs:4163:22)
    at async eval (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/tsdown@0.15.6_typescript@5.9.3/node_modules/tsdown/dist/src-Bl9Gdsdl.mjs:1351:35)
    at async rebuild (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/tsdown@0.15.6_typescript@5.9.3/node_modules/tsdown/dist/src-Bl9Gdsdl.mjs:1341:3)
    at async buildSingle (file:///home/projects/rolldown-rolldown-starter-stackblitz-xruawaix/node_modules/.pnpm/tsdown@0.15.6_typescript@5.9.3/node_modules/tsdown/dist/src-Bl9Gdsdl.mjs:1330:2) {
  errors: [Getter/Setter]
}
undefined

Any additional comments?

I've opened rolldown/rolldown#6404 some time ago, but as it was ignored, I've reopened the issue at the proper repository. This problem is blocking significant part of my work, making it impossible to do anything related to tsdown.

[finom]

@sxzz Is there a chance for this issue to be prioritized? I'm checking each published version, and the problem persists in all of them: https://stackblitz.com/edit/rolldown-rolldown-starter-stackblitz-m8ubfxwi?file=package.json,build.mjs
(v0.15.10). Downgrading doesn't help, as previous versions also rely on rolldown@latest.

I'm working on an open-source project that’s supposed to have a bundle command as one of its crucial features. The feature was already fully implemented, tested, and documented, but tsdown suddenly began throwing an error that I couldn’t work around. Since JSON import is a very basic feature of every JavaScript/TypeScript environment, I was hoping this problem would be resolved—or at least receive some attention.

I find it quite frustrating that it hasn’t even been triaged. I hope you can take a look at it and let me know whether it’s going to be fixed. Thank you.

[ocavue]

Hi @finom. I'm sorry about the delay. I must have somehow missed this ticket. I can reproduce the issue you mentioned, and I've created an upstream issue at sxzz/rolldown-plugin-dts#128.

[finom]

@ocavue thank you for the response! Let me know if you need additional input from me.

[sxzz]

Fixed via sxzz/rolldown-plugin-dts@6a2aab3

Please upgrade to rolldown-plugin-dts@0.17.2 (it's a sub-dependency)

[finom]

@ocavue @sxzz It looks like it wasn't fixed. Here is the Stackblitz link: https://stackblitz.com/edit/rolldown-rolldown-starter-stackblitz-5bmwwjtg?file=package.json

I've also run the tests locally, they're passing, until I used the openapi.json file from the example above:

[finom]

Here is the failing test reproduction in a fork https://github.com/finom/rolldown-plugin-dts/actions/runs/18868315138/job/53840478657

[sxzz]

Can you please test https://github.com/sxzz/rolldown-plugin-dts/runs/53840985145 via resolutions field?

[finom]

@sxzz looks like it works! I've rashly checked with my small openapi.json file but also made a test for a huge OpenAPI spec for Github API (unfortunately, I couldn't save the Github spec at Stackblitz as it's too big).

https://stackblitz.com/edit/rolldown-rolldown-starter-stackblitz-kdmhxanr?file=openapi.json

[finom]

Here is the Github OpenAPI spec if it would be relevant for the tests https://raw.githubusercontent.com/github/rest-api-description/main/descriptions/api.github.com/api.github.com.json

[finom]

@sxzz @ocavue I don't know how relevant is that as tsdown hasn't been released with rolldown-plugin-dts@0.17.3 dependency, but I tried to use the latest version of rolldown-plugin-dts thru the root overrides and got this:

https://stackblitz.com/edit/rolldown-rolldown-starter-stackblitz-xxxvmffe?file=package.json

I've updated the code above to follow the use-case I'm aiming:

index.ts

export { openapi } from './openapi';

openapi.ts

import openapi from './openapi.json' with { type: "json" };

export { openapi };