Managing these dependencies are implemented by symlinks.Īs we see later, lerna and yarn workspaces give us the ability to build libraries and apps in a single repo without forcing us to publish to npm or other registries. Packages might have dependency relations between each other. Therefore, every package contains its own package.json file due to the fact that every package is a full-fledged project on its own. These packages are "Mini-Repos" that can be versioned, built, and published independently. Tool Landscape for Mono-ReposĪ Mono-Repo hosts one or more projects or packages. To find out about differences along with pros and cons of Mono-Repos and Multi-Repos, I recommend Markus Oberlehner’s article about Monorepos in the Wild. Plus, there exist teams leveraging both approaches because the technology, which is part of the repository, is also a factor to have in mind for decision-making (e.g., every Java micro-service is part of an own git repo). There are teams that pursue a Multi-Repo approach and there are teams believing in a Multi-Repo maxim. In my current job, we constitute multiple teams where each team has its own repositories. Of course, a combination of both approaches is possible. In contrast, using multiple repositories with each repository housing only one project is called a Multi-Repo approach. Such projects are called workspaces or packages. In short, a so-called Mono-Repo is a (git) repository that houses multiple projects. A lot of articles were written or conference talks were given about this topic. Mono-Repo) has gained some traction for about one or two years. Tools like lerna and yarn workspaces have been a decisive factor with the result that managing your codebase in a single repo (a.k.a. What is a Mono-Repo? How does it Compare to Multi-Repo? Especially lerna and yarn workspaces can peacefully coexist in a project. It also makes sense to use these tools in combination. However, the goal of this article is all about Mono-Repos and how lerna, npm, and yarn ( workspaces) can help. I don’t want to assess in great detail what repository type is better in which circumstance. After a brief introduction to Mono-Repos and a comparison with Multi-Repos, I go into tools for establishing Mono-Repos. That gives us a package.This post is my take on the topic of Mono-Repo. Question description: my little button project (Can’t think of a name? mkdir buttons & cd buttons will work fine.)įirst off, let’s initialize the project: $ yarn init Time to dive into code - start by creating a top-level directory on the command-line to house the project and then cd into it. I believe the monorepo is particularly useful when all packages are coded in the same programming language, tightly coupled, and relying on the same tooling. (And it just so happens to align with with everything we’ve talked about so far.) I like what Leonardo Losoviz has to say about the monorepo approach. In AgnosticUI, for example, I’m currently using Storybook and often kick off all the framework Storybooks, or run snapshot testing across the entire monorepo. As this sort of project grows, it’s safe to assume there will be more proper testing. We want the convenience of firing up all four button implementations at the same time for testing. Ideally, we’d like to correct things in one place rather than making individual fixes in separate repositories. Let’s say the button needs a tweak - like the “focus-ring” implementation, or we screwed up the use of aria in the component templates. A monorepo setup provides a convenient structure that facilitates copying our single button.css component into various framework-based projects. So, by nature, there’s some purposeful coupling going on between the various framework implementations and the single-source-of-truth CSS file. We’re trying to build a single button component that uses just one button.css file across multiple frameworks. But here’s my own biased list of benefits that I feel are relevant for our little buttons endeavor: Coupling Why? Chris actually has a nice outline of the benefits in another post. We’re going to set up a tiny Yarn workspaces-based monorepo. Updating each component to take a mode property.The source code for this article is available on GitHub on the the-little-button-that-could-series branch. So that’s exactly what we’ll do today in this article: build a button component that works across all these frameworks. AgnosticUI works in React, Vue 3, Angular, and Svelte. I’ve been working on a component library called AgnosticUI where the purpose is building UI components that aren’t tied to any one particular JavaScript framework. Your mission - should you decide to accept it - is to build a Button component in four frameworks, but, only use one button.css file!
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