82 lines
3.3 KiB
Markdown
82 lines
3.3 KiB
Markdown
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---
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title: registry
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section: 7
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description: The JavaScript Package Registry
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---
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### Description
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To resolve packages by name and version, npm talks to a registry website
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that implements the CommonJS Package Registry specification for reading
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package info.
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npm is configured to use the **npm public registry** at
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<https://registry.npmjs.org> by default. Use of the npm public registry is
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subject to terms of use available at <https://docs.npmjs.com/policies/terms>.
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You can configure npm to use any compatible registry you like, and even run
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your own registry. Use of someone else's registry may be governed by their
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terms of use.
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npm's package registry implementation supports several
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write APIs as well, to allow for publishing packages and managing user
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account information.
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The npm public registry is powered by a CouchDB database,
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of which there is a public mirror at <https://skimdb.npmjs.com/registry>.
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The registry URL used is determined by the scope of the package (see
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[`scope`](/using-npm/scope). If no scope is specified, the default registry is used, which is
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supplied by the `registry` config parameter. See [`npm config`](/commands/npm-config),
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[`npmrc`](/configuring-npm/npmrc), and [`config`](/using-npm/config) for more on managing npm's configuration.
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When the default registry is used in a package-lock or shrinkwrap is has the
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special meaning of "the currently configured registry". If you create a lock
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file while using the default registry you can switch to another registry and
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npm will install packages from the new registry, but if you create a lock
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file while using a custom registry packages will be installed from that
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registry even after you change to another registry.
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### Does npm send any information about me back to the registry?
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Yes.
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When making requests of the registry npm adds two headers with information
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about your environment:
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* `Npm-Scope` – If your project is scoped, this header will contain its
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scope. In the future npm hopes to build registry features that use this
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information to allow you to customize your experience for your
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organization.
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* `Npm-In-CI` – Set to "true" if npm believes this install is running in a
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continuous integration environment, "false" otherwise. This is detected by
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looking for the following environment variables: `CI`, `TDDIUM`,
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`JENKINS_URL`, `bamboo.buildKey`. If you'd like to learn more you may find
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the [original PR](https://github.com/npm/npm-registry-client/pull/129)
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interesting.
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This is used to gather better metrics on how npm is used by humans, versus
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build farms.
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The npm registry does not try to correlate the information in these headers
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with any authenticated accounts that may be used in the same requests.
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### How can I prevent my package from being published in the official registry?
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Set `"private": true` in your `package.json` to prevent it from being
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published at all, or
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`"publishConfig":{"registry":"http://my-internal-registry.local"}`
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to force it to be published only to your internal/private registry.
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See [`package.json`](/configuring-npm/package-json) for more info on what goes in the package.json file.
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### Where can I find my own, & other's, published packages?
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<https://www.npmjs.com/>
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### See also
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* [npm config](/commands/npm-config)
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* [config](/using-npm/config)
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* [npmrc](/configuring-npm/npmrc)
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* [npm developers](/using-npm/developers)
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