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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
```
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