dts: declarations from vite-plugin-dts, tsc and tsdown's .d.cts are not augmented

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难度
5/5
预计耗时
一周以上
新手友好度
35/100
Issue 类型
功能
描述清晰度
基本清楚
活跃度
活跃
技术栈
rust, typescript, vite

调研方向

Start by reading the dts plugin implementation around generateBundle and compare it with the writeBundle behavior described for vite-plugin-dts and the separate tsdown CJS declaration pass. Reproduce the Vite and tsdown cases using the versions and outputs listed in the issue, then determine which proposed integration point can cover declarations written outside the bundle. Done means generated .d.ts and .d.cts files receive the required augmentation in these cases.

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描述

Found while reviewing #683 (the README now says this; this issue tracks support).

The dts plugin only sees declarations that are in the bundle at generateBundle. These are written outside it, so libraries built with them still ship plain classes and consumers fail with NG2012, as in #681:

generator why it is missed
vite-plugin-dts 5.x (unplugin-dts) writes .d.ts with fs.writeFile in writeBundle, after generateBundle
tsc writes files itself
tsdown format: 'cjs' / dual builds .d.cts in a separate pass that leaves out user plugins; only .d.mts is augmented

Checked with Vite 8.3.6 lib mode + vite-plugin-dts 5.1.2 (0 ɵ members in every .d.ts), and tsdown 0.23.7 esm+cjs (.d.mts augmented, .d.cts plain).

Possible directions: a writeBundle / closeBundle pass that rewrites .d.ts files on disk in the output dir, an exported helper users can call from tsdown's build:done hook, or an upstream hook in tsdown's cjs dts pass.

主要语言
Rust
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1 天 42 分钟
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  3. Fork 仓库,在一个分支上完成修改。
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