npm-registry-client

What is npm-registry-client?

The npm-registry-client package is a client for interacting with the npm registry. It allows you to perform various operations such as fetching package metadata, publishing packages, and managing package versions.

What are npm-registry-client's main functionalities?

Fetching Package Metadata

This feature allows you to fetch metadata for a specific package from the npm registry. The code sample demonstrates how to fetch metadata for the 'npm' package.

const NpmRegistryClient = require('npm-registry-client');
const client = new NpmRegistryClient();
const uri = 'https://registry.npmjs.org/npm';
client.get(uri, {}, (error, data, raw, res) => {
  if (error) {
    console.error(error);
  } else {
    console.log(data);
  }
});

Publishing a Package

This feature allows you to publish a package to the npm registry. The code sample demonstrates how to publish a package named 'my-package' with version '1.0.0'.

const NpmRegistryClient = require('npm-registry-client');
const client = new NpmRegistryClient();
const uri = 'https://registry.npmjs.org/npm';
const params = { metadata: { name: 'my-package', version: '1.0.0' }, access: 'public' };
client.publish(uri, params, (error, data) => {
  if (error) {
    console.error(error);
  } else {
    console.log('Package published successfully');
  }
});

Managing Package Versions

This feature allows you to manage and list the available versions of a package. The code sample demonstrates how to list all available versions of the 'npm' package.

const NpmRegistryClient = require('npm-registry-client');
const client = new NpmRegistryClient();
const uri = 'https://registry.npmjs.org/npm';
client.get(uri, {}, (error, data) => {
  if (error) {
    console.error(error);
  } else {
    console.log('Available versions:', Object.keys(data.versions));
  }
});

Other packages similar to npm-registry-client

npm

The 'npm' package itself provides a command-line interface for interacting with the npm registry. It offers a wide range of functionalities including installing packages, publishing packages, and managing dependencies. Compared to npm-registry-client, it is more comprehensive and user-friendly for general use.

yarn

Yarn is a package manager that also interacts with the npm registry. It offers similar functionalities such as installing, publishing, and managing packages. Yarn is known for its speed and reliability, and it provides a different workflow compared to npm-registry-client.

pnpm

pnpm is another package manager that interacts with the npm registry. It is designed to be fast and efficient, with a unique approach to managing node_modules. Compared to npm-registry-client, pnpm focuses on performance and disk space optimization.

README

npm-registry-client

The code that npm uses to talk to the registry.

It handles all the caching and HTTP calls.

Usage

var RegClient = require('npm-registry-client')
var client = new RegClient(options)

client.get("npm", "latest", 1000, function (er, data, raw, res) {
  // error is an error if there was a problem.
  // data is the parsed data object
  // raw is the json string
  // res is the response from couch
})

Options

• registry Required {String} URL to the registry
• cache Required {String} Path to the cache folder
• alwaysAuth {Boolean} Auth even for GET requests.
• auth {String} A base64-encoded username:password
• email {String} User's email address
• tag {String} The default tag to use when publishing new packages. Default = "latest"
• ca {String} Cerficate signing authority certificates to trust.
• strictSSL {Boolean} Whether or not to be strict with SSL certificates. Default = true
• userAgent {String} User agent header to send. Default = "node/{process.version}"
• log {Object} The logger to use. Defaults to require("npmlog") if that works, otherwise logs are disabled.

client.request(method, where, [what], [etag], [nofollow], cb)

• method {String} HTTP method
• where {String} Path to request on the server
• what {Stream | Buffer | String | Object} The request body. Objects that are not Buffers or Streams are encoded as JSON.
• etag {String} The cached ETag
• nofollow {Boolean} Prevent following 302/301 responses
• cb {Function}
  • error {Error | null}
  • data {Object} the parsed data object
  • raw {String} the json
  • res {Response Object} response from couch

Make a request to the registry. All the other methods are wrappers around this. one.

client.adduser(username, password, email, cb)

• username {String}
• password {String}
• email {String}
• cb {Function}

Add a user account to the registry, or verify the credentials.

client.get(url, [timeout], [nofollow], [staleOk], cb)

• url {String} The url path to fetch
• timeout {Number} Number of seconds old that a cached copy must be before a new request will be made.
• nofollow {Boolean} Do not follow 301/302 responses
• staleOk {Boolean} If there's cached data available, then return that to the callback quickly, and update the cache the background.

Fetches data from the registry via a GET request, saving it in the cache folder with the ETag.

client.publish(data, tarball, [readme], cb)

• data {Object} Package data
• tarball {String | Stream} Filename or stream of the package tarball
• readme {String} Contents of the README markdown file
• cb {Function}

Publish a package to the registry.

Note that this does not create the tarball from a folder. However, it can accept a gzipped tar stream or a filename to a tarball.

client.star(package, starred, cb)

• package {String} Name of the package to star
• starred {Boolean} True to star the package, false to unstar it.
• cb {Function}

Star or unstar a package.

Note that the user does not have to be the package owner to star or unstar a package, though other writes do require that the user be the package owner.

client.tag(project, version, tag, cb)

• project {String} Project name
• version {String} Version to tag
• tag {String} Tag name to apply
• cb {Function}

Mark a version in the dist-tags hash, so that pkg@tag will fetch the specified version.

client.unpublish(name, [ver], cb)

• name {String} package name
• ver {String} version to unpublish. Leave blank to unpublish all versions.
• cb {Function}

Remove a version of a package (or all versions) from the registry. When the last version us unpublished, the entire document is removed from the database.

client.upload(where, file, [etag], [nofollow], cb)

• where {String} URL path to upload to
• file {String | Stream} Either the filename or a readable stream
• etag {String} Cache ETag
• nofollow {Boolean} Do not follow 301/302 responses
• cb {Function}

Upload an attachment. Mostly used by client.publish().