T
The Daily Insight

What does lerna version do

Author

Emily Dawson

Published Mar 15, 2026

Lerna is a tool that optimizes the workflow around managing multi-package repositories with git and npm. Lerna can also reduce the time and space requirements for numerous copies of packages in development and build environments – normally a downside of dividing a project into many separate NPM packages.

What is npm lerna?

Lerna​ Lerna is a tool to manage several Javascript projects with multiple packages (called monorepos), optimizing the workflows around them. You can install it globally with npm install –global lerna , yarn global add lerna or your favourite package manager, to run commands with lerna <command> .

Does lerna use yarn?

Using Lerna and Yarn Workspaces together Lerna provides an option for you to use it with Yarn Workspaces. To use Yarn instead of the npm client, you have to specify “npmClient”: “yarn” in lerna. json , a setting file of Lerna. Many projects use Lerna with Yarn Workspaces.

Who's using lerna?

  • Postclick.
  • quero.
  • caredoc.
  • Frontend.
  • Our Stack.
  • Redfin.
  • Greener Bio.
  • Maze.

How do I publish to Npmjs?

  1. On the command line, navigate to the root directory of your package. cd /path/to/package.
  2. To publish your scoped public package to the npm registry, run: npm publish –access public.

What is lerna in react?

Lerna · A tool for managing JavaScript projects with multiple packages. A tool for managing JavaScript projects with multiple packages.

What is lerna JSON file?

lerna. json serves as the configuration file for lerna, so the properties you enter there are relevant specifically to lerna. … json’s for every package, since these are what get used to publish to NPM and used to resolve dependencies when the package gets installed.

Which is better npm or yarn?

As you can see above, Yarn clearly trumped npm in performance speed. During the installation process, Yarn installs multiple packages at once as contrasted to npm that installs each one at a time. … While npm also supports the cache functionality, it seems Yarn’s is far much better.

How do I publish my lerna packages?

  1. Step 1: Setup the mono-repository. …
  2. Step 2: Populate the packages directory with subdirectory for each package. …
  3. Step 3: Creating a Personal Access Token. …
  4. Step 4: login to npm.pkg.github.com. …
  5. Step 5: Publish the packages.
Why is monorepo good?

With a monorepo, projects can be organized and grouped together in whatever way you find to be most logically consistent, and not just because your version control system forces you to organize things in a particular way. Using a single repo also reduces overhead from managing dependencies.

Article first time published on

How does lerna publish work?

Fixed mode Lerna projects operate on a single version line. The version is kept in the lerna. json file at the root of your project under the version key. When you run lerna publish , if a module has been updated since the last time a release was made, it will be updated to the new version you’re releasing.

What does npm publish do?

Publishes a package to the registry so that it can be installed by name. By default npm will publish to the public registry. This can be overridden by specifying a different default registry or using a scope in the name (see package. … By default, npm publish updates and npm install installs the latest tag.

What is Rush JS?

Rush is a unified orchestrator that can install, link, build, generate change logs, publish, and bump versions.

How do I start the lerna project?

To start to use lerna you need install the package in mode global or use npx, when you decide what you need to do. Before to continue I suggest you create a branch and call it lerna-init, it will be used in the future. After that we need to init our lerna project, lerna has two modes: fixed/locked and independent.

Do I need lerna with yarn workspaces?

Lerna isn’t required when you don’t need the git diffing and versioning facilites. What’s more Yarn Workspaces are a great lightweight tool to get up and running faster for simple Node.

What is lerna Webpack?

A package with a webpack config that has dependencies on packages in the monorepo. … Code splitting and asynchronous loading.

What is yarn and Lerna?

Lerna: A tool for managing JavaScript projects. … It optimizes the workflow around managing multi-package repositories with git and npm; Yarn: A new package manager for JavaScript. Yarn caches every package it downloads so it never needs to again.

Does lerna support yarn 2?

Yarn 2 is rewritten from scratch and has extended support for workspaces, its plugin architecture has benefits for tools such lerna. There is good summary of yarn 2 features in article by one of the yarn authors.

How do I get rid of Lerna?

Currently there’s no way to remove a dependency from a lerna package, the closest way we can do is to manually remove from package. json , lerna clean –yes –scope=xxx + lerna bootstrap –scope=xxx . This command provides the remove dependency feature.

Why do we need .npmrc file?

Whenever you are working locally in a project, the config values for that specific project is set by a . npmrc file in the root of the project(ie, a sibling of node_modules and the package. json). It should be noted that this only applies to the root of the project that you are running npm in.

Is publishing npm package free?

This means you can publish the package under your own username (or npm organization), so you’re free from naming problems. … Run npm init –scope=username instead of npm init.

How do I write npm readme?

  1. In a text editor, in your package root directory, create a file called README.md .
  2. In the README.md file, add useful information about your package.
  3. Save the README.md file.

Who uses monorepo?

Google is one of many large companies that famously uses a monorepo. Google decided early on to use a monorepo — and scaled it up as the company grew. In 2015, the Google monorepo held: 86 terabytes of data.

How do you add yarn globally?

Note: Unlike the –global flag in npm, global is a command which must immediately follow yarn . Entering yarn add global package-name will add the packages named global and package-name locally instead of adding package-name globally.

Where is Lerna?

LocationMyloi, Peloponnese, GreeceCoordinates37°33′N 22°43′ECoordinates: 37°33′N 22°43′ETypeSettlementHistoryFounded2500 BCE

What are yarn workspaces?

Yarn Workspaces is a feature that allows users to install dependencies from multiple package. json files in subfolders of a single root package. … Yarn can also create symlinks between Workspaces that depend on each other, and will ensure the consistency and correctness of all directories.

Does npm have workspaces?

Workspaces is a generic term that refers to the set of features in the npm cli that provides support to managing multiple packages from your local files system from within a singular top-level, root package.

How do I install a private GitHub package?

  1. Authenticate to GitHub Packages. For more information, see “Authenticating to GitHub Packages.”
  2. Add the . npmrc file to the repository where GitHub Packages can find your project. …
  3. Configure package. json in your project to use the package you are installing. …
  4. Install the package. $ npm install.

What is Yarn used for JavaScript?

Yarn is a package manager for your code. It allows you to use and share (e.g. JavaScript) code with other developers from around the world. Yarn does this quickly, securely, and reliably so you don’t ever have to worry.

Can we install both Yarn and npm?

Although a few commenters here say its ok to mix both yarn and npm on the same project, after using yarn and npm and then yarn again, this is what yarn has to say about it: warning package-lock. json found. Your project contains lock files generated by tools other than Yarn.

Can I install Yarn with npm?

Yarn has a unique way of installing and running itself in your JavaScript projects. … The Yarn maintainers recommend installing Yarn globally by using the NPM package manager, which is included by default with all Node. js installations.