Lerna is a tool that optimizes the workflow around managing multi-package repositories with git and npm. It allows you to manage your project's dependencies, versioning, and publishing in a more organized manner, especially when dealing with a monorepo containing multiple packages.
Bootstrap
Installs all of the dependencies for each package, links any cross-dependencies, and ensures that each package can find and use the correct versions of each other.
lerna bootstrapPublish
Helps with versioning of the changes and publishing packages that have been updated to npm. It can automatically determine version bumps based on conventional commits, create git tags, and push releases to the repository.
lerna publishRun
Runs an npm script in each package that contains that script. The '--scope' flag can be used to run the script only in specified packages.
lerna run --scope my-package testExec
Executes an arbitrary command in each of your packages. In this example, it removes the 'node_modules' directory from each package.
lerna exec -- rm -rf ./node_modulesList
Lists all of the public packages in the current Lerna repo.
lerna listChanged
Lists public packages that have changed since the last tagged release.
lerna changedDiff
Shows the diff since the last release for a single package or all packages.
lerna diffImport
Imports an external repository into the 'packages' folder of your Lerna monorepo, preserving the commit history.
lerna import <path-to-external-repository>Nx is a suite of powerful, extensible dev tools that help you develop, test, build, and scale Angular and React applications with fully integrated support for monorepo management. It provides a more integrated experience for building applications compared to Lerna, which is more focused on package management.
A tool for managing JavaScript projects with multiple packages.
Check out our documentation here.
npm i -D lerna
FAQs
Lerna is a fast, modern build system for managing and publishing multiple JavaScript/TypeScript packages from the same repository
The npm package lerna receives a total of 764,559 weekly downloads. As such, lerna popularity was classified as popular.
We found that lerna demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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