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## Issue When `injectWorkspacePackages: true` is set and a workspace package depends on another workspace package that has its own dependencies, running `pnpm rm` from inside the dependent package's directory switches the lockfile protocol from `link:` to `file:`. Reproduction (workspace where `a` depends on workspace `b`, and `b` has any dependency of its own): ``` cd packages/a pnpm add redis pnpm rm redis # pnpm-lock.yaml: a's "b" entry switched from link:../b to file:packages/b ``` ## Root Cause The fix in #10575 added a defensive guard in `dedupeInjectedDeps` that skipped deduplication whenever the target workspace project's children weren't in `dependenciesByProjectId`: ```ts if (!targetProjectDeps) { if (children.length > 0) continue } ``` In single-project operations (`mutateModulesInSingleProject`, used by `pnpm rm` from inside a package directory) only the operated-on project is resolved. `dependenciesByProjectId` then only has that one project, so the guard fires for any workspace dependency whose target has children, and the protocol stays `file:`. ## Solution In single-project mode the injected dep is resolved against the same workspace package source, so dedupe is safe — *except* for peer-suffixed depPaths, whose resolution depends on the importer's peer context (a plain `link:` would lose it). The new code dedupes whenever `targetProjectDeps` is missing for a known workspace project and the depPath has no peer suffix. The peer-suffix check compares the depPath against its peer-free `pkgIdWithPatchHash` (depPaths are built as `${pkgIdWithPatchHash}${peerDepGraphHash}`), so it's exact rather than a `(`-substring heuristic. --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com> Co-authored-by: Zoltan Kochan <z@kochan.io>
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Fast, disk space efficient package manager:
- Fast. Up to 2x faster than the alternatives (see benchmark).
- Efficient. Files inside
node_modulesare linked from a single content-addressable storage. - Great for monorepos.
- Strict. A package can access only dependencies that are specified in its
package.json. - Deterministic. Has a lockfile called
pnpm-lock.yaml. - Works as a Node.js version manager. See pnpm runtime.
- Works everywhere. Supports Windows, Linux, and macOS.
- Battle-tested. Used in production by teams of all sizes since 2016.
- See the full feature comparison with npm and Yarn.
To quote the Rush team:
Microsoft uses pnpm in Rush repos with hundreds of projects and hundreds of PRs per day, and we’ve found it to be very fast and reliable.
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Background
pnpm uses a content-addressable filesystem to store all files from all module directories on a disk. When using npm, if you have 100 projects using lodash, you will have 100 copies of lodash on disk. With pnpm, lodash will be stored in a content-addressable storage, so:
- If you depend on different versions of lodash, only the files that differ are added to the store.
If lodash has 100 files, and a new version has a change only in one of those files,
pnpm updatewill only add 1 new file to the storage. - All the files are saved in a single place on the disk. When packages are installed, their files are linked from that single place consuming no additional disk space. Linking is performed using either hard-links or reflinks (copy-on-write).
As a result, you save gigabytes of space on your disk and you have a lot faster installations!
If you'd like more details about the unique node_modules structure that pnpm creates and
why it works fine with the Node.js ecosystem, read this small article: Flat node_modules is not the only way.
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Getting Started
Benchmark
pnpm is up to 2x faster than npm and Yarn classic. See all benchmarks here.
Benchmarks on an app with lots of dependencies:
License
MIT, except the pnpr/ directory, which is source-available under the PolyForm Shield License 1.0.0.