![]() ![]() That’s a better solution than yarn-link since it does not change the whole system but only relevant workspace.Īdditonla benefits include having a single node_modules files which means you dno’t clone dependencies across packages. In Yarn workspaces they are all linked together so your workspaces become dependent on each other and code remains up to date. Yarn Workspaces makes monorepos easier mainly around working with dependencies. For example, learn here about how Bit solved monorepo dependency management in a short overview written by the maker of pnpm.Īddition: pnpm workspace is a really great option for those working with pnpm which in my humble opinion is preferable to Yarn. It solves many of the problems in monorepos. Bitīit is probably the first tool you should try out. ![]() A monorepo might solve some, but create new problems such as builds, learning-curve, versioning, coupling etc that will make scale very hard later on.īest of luck, and feel free to ask anything in the comments. The important thing is to remember why you are looking for such a tool in the first place, and what problem you are trying to solve, such as code-sharing, dependencies, collaboration, discoverability, standardization etc. This shortlist brings you the best of the best options for turning any JS repository into a monorepo - whether it’s for developing a few different projects or components inside, or if its for publishing and code-sharing. All of them will now have to find a way to replace Lerna with a new solution. As a result, you can now find well over 100k projects on GitHub that depend on Lerna. Over time, however, Lerna became a synonym for the word “monorepo” in Javascript, without people realizing the difference. Publishing multiple packages from the same repository solves problems of code-sharing, which are a classic pain of working in a multi-repo architecture, which is different and more scalable than a centralized monolith repo. That is to say, not to build a “monolith” in the traditional sense of the word where multiple applications or services are developed, built, and deployed in the same repository. module.As of April 2022 LernaJS is no longer maintained.Ĭreated by Henry Zhu, Lerna’s goal was to automate the workflow of creating and publishing multiple packages for the same javascript repository. This setup generates a code-coverage report and uses ts-jest which allows us to use TypeScript. To get our tests to run, we need to create a Jest configuration file located at the root of our project ( ). The package.json needs to modified to NPM where to find the packages will be located. npm install -save-dev typescript jest ts-jest packages will be located in the packages directory. We'll be using jest as the test framework. Next we can install some dependencies that we'll use to compile and test our packages. The first thing we need to do is create a directory for our project and initiate a private NPM package. Step 1: Setting up the top-level NPM project In a couple of steps I'll walk through setting up a multi-package mon0-repo for a TypeScript project that uses Jest for testing. After figuring out how to do it, I thought I'd share this for those who are looking to do the same. It wasn't immediately clear how to set this up. While I was setting up a project, I tried to search for a way to combine workspaces with scoped packages. Since version 7 NPM follows suit by adding support for workspaces, opening up the world of multi-package tooling for NPM-only users. ![]() Lerna and Yarn workspaces provide tools to ease the lives of multi-package mono-repo maintainers. ![]()
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