9/18/2023 0 Comments Lerna vs yarn workspacesYou can use either Lerna or Yarn Workspaces to manage your repository, but you may have noticed that they are more complementary than exclusionary. Some popular examples of monorepos are Next. The order of execution you get from running the command is depends on your workspaces array in package.json. Yarn Workspaces is a low-level tool that handles the packages installation, creates a symlink between projects, and allocates the modules in root and controlled projects folders. FebruMonorepo Lerna Yarn Npm React Monorepos are a great way of building multi-package apps as they help keep all of your code in one single place. Lerna is a tool used to manage monorepos. Storybook is used to build and test UI components. Let’s say that package-a depends on package-b and package-c depends both on package-a and package-b. Yarn Workspaces is used to optimize and link different packages together. This command will run npm run build for all the monorepo packages. But there is a small thing to keep in mind: $ npm run build -workspaces Workspaces for example know that package-c uses package-a and package-b as its dependencies. For examle, yarn workspace my-lib run eslint equivalent to cd my-lib yarn run eslint. Npm workspaces are aware of monorepo package topology to certain level. In a monorepo setup (for example one that uses lerna or yarn workspaces) commands are run with the CWD of the command being that of the package they are running in. Were going to discuss Yarn Workspaces first to understand. lerna.json package. Create a new Lerna monorepo with lerna init: npx lerna init Initialized Lerna files should look like: tree. These are the things that are not handled by workspaces (as of writing of this answer): Lets discover how to handle monorepos with multiple packages using Yarn Workspaces and LernaJS. This post goes over how to set up a Lerna monorepo with Yarn workspaces. With the increasing popularity of the monorepo strategy for storing source code, there is a growing number of tools to manage projects in a monorepo, such as Bazel, Lerna, Rush, or Nx. The answer is yes, you still need Lerna or other tool to complement the features that came with workspaces. Rush vs Nx: A Comparison of TypeScript Monorepo Management Tools November 11, 2020. Also IMO lerna fits more to develop libs rather than apps. I've written an article that goes deeper into the configuration in case you want to move to a monorepo with npm7, so working without lerna is definitely an option, you will probably need to do more work on the CI/CD side compared to lerna and add some dev scripts by your self that will affect the nested packages. ![]() you are welcome to explore the extra commands provided by lerna. One great example is the command: lerna changed which gives you the list of packages that have changed since the last tagged release, this could be extremely helpful for CI/CD. With that said, lerna comes with many more high level features than npm or yarn workspaces. Managing monorepos with lerna and yarn workspaces. npm run and npm exec can be run across individual or all workspaces: npm run test -workspace=a -workspace="name-from-package-dot-json" With workspaces, npm i / npm ci takes care of nested packages and symlinking. ![]() NPM has supported workspaces since version 7, for two major releases now.
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