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Add verdaccio's per-uplink tuning knobs to pnpr's proxy uplinks, parsed
from the same config.yaml shape verdaccio uses:
- maxage: per-uplink packument freshness window; overrides the
global packument_ttl when set, otherwise defers to it.
- timeout: per-request deadline applied to every upstream fetch
(default 30s).
- max_fails / circuit breaker: after max_fails consecutive failures the
fail_timeout uplink short-circuits with a 503 until the fail_timeout
cooldown lapses, then one probe per window is allowed
through (defaults 2 / 5m). max_fails: 0 disables it.
- cache: when false, tarballs stream through without being written
to the local mirror (default true).
Interval values accept verdaccio's format ("2m", "30s", "1h30m", or a
bare number of seconds, as either a YAML string or a numeric scalar);
an unparsable or out-of-range value is a named InvalidConfig error
rather than a silent fallback or a panic. Defaults match verdaccio
(timeout 30s, max_fails 2, fail_timeout 5m, cache true).
Circuit breaker behavior:
- Only a 5xx or transport error counts as a failure; a non-404 4xx
(auth / rate-limit / bad request) surfaces verbatim and never opens
the circuit.
- The half-open probe is gated on the cooldown window, so exactly one
probe runs per fail_timeout and a cancelled or dropped probe cannot
stick the breaker open.
- An open breaker reports the configured uplink name, not its upstream
URL, so the 503 does not disclose internal endpoints.
Part of the verdaccio-parity tracking issue pnpm/pnpm#11973.
Co-authored-by: Claude <noreply@anthropic.com>
---------
Co-authored-by: Claude Opus 4.8 (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.