🐛 False positive unused export

[DreierF]

Prerequisites

• I'm using the latest version
• I've read the relevant documentation
• I've searched for existing issues
• I've checked the list of known issues
• I've read the issue reproduction guide

Reproduction url

https://stackblitz.com/edit/github-99dfwi73-hxo2rmv8?file=index.ts

Reproduction access

• I've made sure the reproduction is publicly accessible

Description of the issue

Observed behavior
The example produces:

Unused exports (1)
bar  mod1  function  mod1.ts:5:17

while bar is actually used in index.ts.

Expected behavior
No error

[webpro]

Thanks for the repro. Personally I wouldn't call this "barrel-like", btw.

Either way, it's a bit of an unfortunate case:

• By default, Knip assumes all members of mod1Exports used because of the default heuristics: https://knip.dev/guides/namespace-imports
• Then there's --include nsExports but the destructured ...mod1Exports is something Knip is unable to follow further.
• And there's --include-libs to hand it over to TypeScript internals (which should be documented better for this use case), but even LS.findReferences doesn't find it. You could verify in your IDE with a "Find All References" from export function bar: this won't bring you to it's usage.

[DreierF]

Yeah, didn't know a more fitting term for this construct. However IntelliJ is able to follow along this usage path, but it might use an internal heuristic there.