Paths are not transformed in dts files

[kishieel]

Describe the bug

I am using the "paths" option in "jsc". The paths are correctly rewritten in the output *.js files, but remain untouched in the *.d.ts files. I would expect them to be rewritten the same way in both types of files.

Input code

export * from "@lib/example";

Config

{
    "$schema": "https://swc.rs/schema.json",
    "sourceMaps": true,
    "jsc": {
      "parser": {
        "syntax": "typescript",
        "decorators": true,
        "dynamicImport": true,
        "dts": true
      },
      "target": "es5",
      "baseUrl": "./",
      "preserveAllComments": false,
      "experimental": {
        "emitIsolatedDts": true
      },
      "paths": {
        "@lib/*": ["src/*"],
        "@tests/*": ["tests/*"]
      }
    },
    "module": {
        "type": "commonjs",
        "strict": true,
        "strictMode": true,
        "lazy": false,
        "noInterop": false
    },
    "minify": false
}

Playground link (or link to the minimal reproduction)

https://play.swc.rs/?version=1.7.24&code=H4sIAAAAAAAAA0utKMgvKlHQUkgrys9VUHfIyUzST61IzC3ISVW3BgCTcYWLHQAAAA%3D%3D&config=H4sIAAAAAAAAA21RsXLCMAzd%2BQrO16nXI1MXJnrtwsDYqcdgHNGYsy2fpLSkHP9eOwlpUuJJfk960pMui2V66oFNBV6r9VJVIpHXRcHfZkVcdMTqxBjUU5fMWJOBnY6c8oVq6PETmwRc2k%2F6Rk0MNEJyaRNEn3MbaSKwIRull235EgySFqSpdMc1QXtrtj4iyQwtMzXCudlRO4YevN5YJZo%2BIQsp4OdhCHXQDO%2FkMr4q%2FuBIkNx8wYtzr%2Bg9hLZdqzzkwDkC2cxpN%2FUN3sqW0WmB8m0Y9G6kqKXiaeXG2UPxmLAPxWRStB%2FZ2wiwcE%2Ff4v2drENkmOyh55THsnYw7Zgvk92bZBPDicf3YSFrZpbf4Tss4Z5z%2Bqf5v6oEB9wGAcI4P5gN9jiULa6%2Ft7hwB6gCAAA%3D&strip-types=

SWC Info output

Operating System:
    Platform: linux
    Arch: x64
    Machine Type: x86_64

Binaries:
    Node: 18.17.0
    npm: 9.6.7
    Yarn: 1.22.22
    pnpm: N/A

Relevant Packages:
    @swc/core: 1.7.26
    @swc/helpers: N/A
    @swc/types: 0.1.12
    typescript: 5.6.2

SWC Config:
    output: N/A
    .swcrc path: N/A

Next.js info:
    output: N/A

Expected behavior

main.d.ts looks like:

export * from "./src/example";

Actual behavior

main.d.ts looks like:

export * from "@lib/example";

Version

@swc/cli: 0.4.0 @swc/core: 1.7.26

Additional context

No response

[kostnerek]

I also stumbled upon this issue, would like to see it resolved!

[robpalme]

TypeScript does not do specifier rewriting today, so this feature would be SWC-specific behavior.

[CPunisher]

swc emits type declarations before does transformation.

swc/crates/swc/src/lib.rs

Line 975 in 185d6f5

let dts_code = if emit_dts && program.is_module() {

@kdy1 So shoud we disable the rewriting (may be breaking change) or do an isolated rewriting ahead of time?

[kdy1]

I think we should apply path_rewriter (or similar name, but in swc_ecma_transforms_module) to the cloned dts module

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.