feat: package deduplication #353
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- resolve symlinks inside "node_modules" directories - add `follow` function to `ResolutionContext` type - move "node_modules" logic into the `yieldPotentialPaths` function - feat: scope-only keys in `extraNodeModules` map - fix: always preserve scope when checking `extraNodeModules` map - fix: throw an error if `resolveRequest` fails to resolve a direct import - [BREAKING] refactor the `FailedToResolveNameError` class This commit adds support for symlinks in any `node_modules` directory. This includes scoped packages. Also, PNPM users rejoice! The `yieldPotentialPaths` function avoids extra work by lazily generating the potential module paths for indirect imports. Also, the resolver now skips over module paths that contain `/node_modules/node_modules/`. The `extraNodeModules` map now has support for keys like `@babel` to act as a fallback for all modules starting with `@babel/`. Previously, if the `resolveRequest` function failed to resolve a direct import, we would continue onto the "node_modules" search logic. The correct behavior is to throw an error.
We cannot assume that `filePath` is _not_ a directory.
Packages with the same name/version pair are deduplicated.
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Rebased onto v0.56 |
An example "package import" is `require("foo")`
Contrast that with a "file import" like `require("foo/bar")`
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Summary
This PR is a follow-up to #350. It deduplicates packages with the same name/version pair. 🎉
throwOnModuleCollisionfor jest-haste-mapskipHastePackagesfor jest-haste-map (feat: add "skipHastePackages" option jestjs/jest#7778)resolveHastePackagefunctionModuleCache#getPackageto use an existing package if it has the samenameandversionModuleCache#processFileChangeto update the"name@version" => packagemapOnly e29c485 is relevant to this PR. The others are from #257.
Test plan
No time to write tests, currently. 😢
I've tested this manually. Works great so far! 😃