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Replace the external `@pnpm/registry-mock` (Verdaccio) test dependency with an in-repo, in-process registry that serves package fixtures to **both** the pacquet Rust tests and the pnpm CLI (Jest) tests. No separately managed registry process is needed. ### How it works - **Fixtures** live at `registry/.fixtures/packages/<name>/<version>/…`, moved verbatim from [`pnpm/registry-mock`](https://github.com/pnpm/registry-mock) (keyed by each `package.json`'s `name`+`version`). - **`pnpm-registry-fixtures`** builds verdaccio-shaped storage from those fixtures; the in-tree **`pnpm-registry`** crate serves it. - Files whose names differ only by case (`@pnpm.e2e/with-same-file-in-different-cases`) and `bundleDependencies` trees are composed **in memory** by the builder, since neither can be committed to the working tree. - **pacquet**: `pacquet-testing-utils`' `TestRegistry` starts the server lazily (once per process) in proxy mode, serving `@pnpm.e2e` fixtures locally and falling through to the npm uplink for real packages (`is-positive`, `is-negative`, …) — matching how registry-mock behaved. - **pnpm CLI**: the `with-registry` Jest `globalSetup` builds storage from the fixtures via the new `pnpm-registry-prepare` binary (built from source in the Test CI job) and serves it with `pnpm-registry`. `REGISTRY_MOCK_PORT` / `REGISTRY_MOCK_CREDENTIALS` / `getIntegrity` now come from `@pnpm/testing.registry-mock`. ### Result `@pnpm/registry-mock` is removed from every manifest, the catalog, and `packageExtensions`; `cargo test` / `cargo nextest run` / `just test` and the pnpm CLI Jest suites all run registry-backed tests without launching Verdaccio.
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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:
