4e18e44e9b
cli_args.rs had grown to ~1500 lines mixing the CLI argument types, the command-dispatch match, the install/deploy/dedupe/prune pipelines, reporter wiring, and packageManager/devEngines parsing — a frequent merge-conflict hotspot. Split it into focused submodules (cli_command, dispatch, pipelines, package_manager, reporter), leaving cli_args.rs as a thin module index. Then split the ~600-line dispatch match: dispatch.rs keeps a RunCtx context and a thin route() match, and the per-command handler bodies move into three modules grouped by behavior — dispatch_install (mutate the install graph), dispatch_query (read-only queries), and dispatch_script (package.json scripts). The refactor is behavior-preserving (visibility widenings, import collapsing for the import-granularity dylint lint, and a `+ Sync` bound on ApproveBuildsArgs::prepare's closures so the shared config/state closures keep the async handler futures Send). Two pre-existing pnpm-parity gaps surfaced by review are also fixed: the `i` alias for install, and scope-aware packageManager parsing. --------- Co-authored-by: Claude <noreply@anthropic.com>
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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.
- Experimental Rust port. Includes pacquet, an experimental port of the CLI written in Rust.
- 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.