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# libnpmpublish [](https://npm.im/libnpmpublish) [](https://npm.im/libnpmpublish) [](https://github.com/npm/cli/actions/workflows/ci-libnpmpublish.yml) [`libnpmpublish`](https://github.com/npm/libnpmpublish) is a Node.js library for programmatically publishing and unpublishing npm packages. Give it a manifest as an object and a tarball as a Buffer, and it'll put them on the registry for you. ## Table of Contents * [Example](#example) * [Install](#install) * [API](#api) * [publish/unpublish opts](#opts) * [`publish()`](#publish) * [`unpublish()`](#unpublish) ## Example ```js const { publish, unpublish } = require('libnpmpublish') ``` ## Install `$ npm install libnpmpublish` ### API #### <a name="opts"></a> `opts` for `libnpmpublish` commands `libnpmpublish` uses [`npm-registry-fetch`](https://npm.im/npm-registry-fetch). Most options are passed through directly to that library, so please refer to [its own `opts` documentation](http://npm.im/npm-registry-fetch#fetch-options) for options that can be passed in. A couple of options of note: * `opts.defaultTag` - registers the published package with the given tag, defaults to `latest`. * `opts.access` - tells the registry whether this package should be published as public or restricted. Only applies to scoped packages, which default to restricted. * `opts.token` - can be passed in and will be used as the authentication token for the registry. For other ways to pass in auth details, see the n-r-f docs. #### <a name="publish"></a> `> libpub.publish(manifest, tarData, [opts]) -> Promise` Sends the package represented by the `manifest` and `tarData` to the configured registry. `manifest` should be the parsed `package.json` for the package being published (which can also be the manifest pulled from a packument, a git repo, tarball, etc.) `tarData` is a `Buffer` of the tarball being published. If `opts.npmVersion` is passed in, it will be used as the `_npmVersion` field in the outgoing packument. You may put your own user-agent string in there to identify your publishes. If `opts.algorithms` is passed in, it should be an array of hashing algorithms to generate `integrity` hashes for. The default is `['sha512']`, which means you end up with `dist.integrity = 'sha512-deadbeefbadc0ffee'`. Any algorithm supported by your current node version is allowed -- npm clients that do not support those algorithms will simply ignore the unsupported hashes. ##### Example ```js // note that pacote.manifest() and pacote.tarball() can also take // any spec that npm can install. a folder shown here, since that's // far and away the most common use case. const path = '/a/path/to/your/source/code' const pacote = require('pacote') // see: http://npm.im/pacote const manifest = await pacote.manifest(path) const tarData = await pacote.tarball(path) await libpub.publish(manifest, tarData, { npmVersion: 'my-pub-script@1.0.2', token: 'my-auth-token-here' }, opts) // Package has been published to the npm registry. ``` #### <a name="unpublish"></a> `> libpub.unpublish(spec, [opts]) -> Promise` Unpublishes `spec` from the appropriate registry. The registry in question may have its own limitations on unpublishing. `spec` should be either a string, or a valid [`npm-package-arg`](https://npm.im/npm-package-arg) parsed spec object. For legacy compatibility reasons, only `tag` and `version` specs will work as expected. `range` specs will fail silently in most cases. ##### Example ```js await libpub.unpublish('lodash', { token: 'i-am-the-worst'}) // // `lodash` has now been unpublished, along with all its versions ```