🐛 Knip doesn't resolve package.json exports when rootDir:"."

[maxpatiiuk]

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-z7snogip?file=README.md

Reproduction access

• I've made sure the reproduction is publicly accessible

Description of the issue

If tsconfig.json rootDir is set to ".", and outDir to "dist", Knip fails to reverse-map package.json exports.

Reproduction steps:

1. npm install
2. npm run knip - see false unused files reports
3. If I move those same files into src/ and update the tsconfig.json rootDir to be src/, the false error goes away

The issue might come from here from the !isUnderSrcDir(absSpecifier, srcDir) && check:

knip/packages/knip/src/util/to-source-path.ts

Lines 38 to 44 in cfb9ac4

	const rewritePattern = (sourceMaps: SourceMap[], absSpecifier: string, extensions: string) => {
	for (const { srcDir, outDir } of sourceMaps) {
	if (!isUnderSrcDir(absSpecifier, srcDir) && isUnderOutDir(absSpecifier, outDir)) {
	return srcDir + absSpecifier.slice(outDir.length).replace(matchExt, extensions);
	}
	}
	};

Use case:

• I wish root-level .ts files, like vite.config.ts and support scripts to be type checked as part of build, so rootDir is set to . rather than src/. This also helps typescript-eslint as it can use the same typescript program instance for the entire package.

A workaround:

• Do not specify a "rootDir" in tsconfig.json - typescript still automatically infers it as ".", where as knip infers it as "src". Fragile 🙂

[github-actions]

Preview release available:

npm i -D https://pkg.pr.new/knip@edfee2b

[webpro]

🚀 This issue has been resolved in v6.13.0. See Release 6.13.0 for release notes.

Using Knip in a commercial project? Please consider becoming a sponsor.

[webpro]

Thanks for the report! Should be good now.