Lerna

Lerna is a tool for managing JavaScript projects with multiple packages. Many times splitting a large codebase into several independently versioned packages is necessary for code sharing. However, this can make testing and tracking changes across repositories quite difficult. As a solution to this, many projects organize their codebases into multi-package repositories. It is Lerna's job to manage these multi-package repositories, optimizing workflow and reducing the time and space requirements for numerous copies of packages in development and build environments.

Lerna's primary functionalities are bootstrap, which links dependencies in the repo together; and publish, which helps publish any updated packages. It is important to note that Lerna is not a deployment tool for serverless monorepos.