using clean: true with multiple builds leads to missing output files

[aleclarson]

import { defineConfig } from 'tsup'

export default defineConfig([
  {
    entry: ['src/index.ts'],
    format: ['cjs', 'esm'],
    clean: true,
  },
  {
    entry: ['src/index.ssr.ts'],
    format: ['esm'],
    clean: true,
  },
])

When I save either entry point, the output file for the other build is erroneously deleted.

I tried enabling clean: true for the first build only, but it didn't help.

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[maxpatiiuk]

I am having a similar issue.
In my case, I need to emit and modify .d.ts files after the build (to workaround #977)
But onSuccess, and esbuilPlugin's onEnd are called before the clean:true option cleans the .d.ts files, which deletes the .d.ts files I create:

tsup/src/api-extractor.ts

Line 159 in 00188a0

cleanDtsFiles(options)