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In the open-source world, one of the most fulfilling experiences is contributing to a project that you’re passionate about. If you’ve been eyeing Uno Platform as your next potential contribution target, you’re in the right place. This guide will walk you through every step of contributing to Uno Platform, from understanding the project’s structure to making your first code contribution.
Uno Platform is a large project, and figuring out where to start can be overwhelming. But don’t worry, we’ve got you covered. Whether you’re a seasoned developer or a novice looking to dip your toes in the water, there’s a place for you in the Uno Platform community.
Remember, contributing to an open-source project is not just about writing code. You can add value in many ways, from reporting issues and providing feedback to improving documentation.
So, let’s dive in and explore how you can become an active part of the Uno Platform community.
Our documentation serves as your compass, guiding you through understanding Uno’s codebase to master the art of creating pull requests; these resources are your companions on the path to making a meaningful impact
The Uno platform repository is a comprehensive hub containing everything that makes up the core Uno project. It is a massive repository, housing several projects, intricate workflows, and a plethora of tests running to validate each feature. This section offers a detailed walkthrough of the Uno platform repository, providing a better understanding of its structure and the particulars of working with it.
The Uno Platform GitHub organization page is a comprehensive hub containing everything that makes up the platform. There are many repositories, so it is beneficial to understand what the main ones represent.
The main repository is the core Uno Platform repository, named Uno. This repository contains all the source code for Uno Platform itself.
The Uno Gallery is a sample application showcasing many of Uno Platform’s features. It is a great starting point for new contributors, as it lets you get to know Uno in a platform-agnostic way before diving into the internals.
The Uno Toolkit UI is a collection of custom controls built for Uno Platform that are not part of the default WinUI code base. This repository will interest you if you like to design custom controls and none of the built-in ones fits your needs.
The Uno Extensions is a set of helpers, extensions, and tools designed to aid in building your Uno Platform application. If you have developed a helpful utility or extension that makes app development easier, consider contributing it here, as others might also benefit from it!
If you love customizing the appearance of your apps, check out the Uno Themes library, which contains various themes that can be applied to the in-app controls.
The Uno Templates library generates new Uno Platform applications when you create a new project in Visual Studio or write .NET New in the console.
Uno Playground is a web-based application that allows you to experiment with the Uno Platform without installing it on your device.
The Uno Samples repository contains many samples of Uno Platform features and UI that you can use as a starting point for your application.
Lastly, we have the Uno.WASM.Boostrap repo contains a library that takes care of running WASM apps in the browser and Uno.Resiszetizer that is used for resizing SVGs to match different screen sizes and APIs for your target devices.
The repository is organized into several folders, each serving a specific purpose. The GitHub folder contains the issue templates that define the list of issue templates on GitHub. The build folder is responsible for building everything in CI. It’s complex, with many operations happening during the CI. Then there’s the documentation folder, housing all the necessary documentation. The most interesting part is the source folder, which contains the source code. Within this folder is a large assortment of projects, each focusing on different aspects of the Uno platform.
The source code in the repository is extensive and includes many different projects—for instance, the Uno.UI folder contains many projects, including the Windows runtime project that houses non-UI APIs such as the accelerometer or GPS geolocator.
There are also several runtime libraries for the specific flavor of the Skia project, each containing platform-specific code. And if you’re interested in building or learning about building C-Sharp code generators, the generators folder is a great place to go and investigate.
To start contributing, finding an issue that matches your expertise and interests is a good first step. The best way to do this is to filter issues in a repository by the ‘good first issue’ label. This label is manually added to issues that are simple and can be handled by new contributors. However, keep in mind that not all ‘good first issue’ labels indicate that the issue will be easy to resolve. Some may be more complex, so you can choose one you feel comfortable tackling.
Once you’ve chosen an issue, you can clone the repository, fork it, and create a custom branch for your changes. When naming your commit, be sure to follow the conventional commits format. After committing your changes to your new branch, push it. You’ll then be able to head back to GitHub to see the changes on your fork and create a pull request.
After marking your PR as ready for review, a team member will check it and provide feedback. If the PR is practical and makes sense, it will be merged into the Uno Platform, and you’ll have your first Uno Platform commit. [Guidelines for Pull-Requests]
As a newcomer to an open-source project, selecting an issue to tackle can be daunting. Finding a starting point might seem overwhelming with many reported issues and an expansive code base. However, understanding the labeling system used in repositories can make the process easier, particularly the ‘good first issue’ label.
Take a look into the list of currently open good first issues – these are all issues that have been identified by our core team as suitable for new contributors, with a well-defined scope and a relatively gentle learning curve. Generally, these issues are easier and provide an excellent starting point for beginners. However, it’s important to note that some issues labeled as good first might still be challenging unless they match your experience. Thus, picking something that aligns with your interests and skill level is crucial.
The core Uno Platform repository is massive, housing hundreds of projects, intricate workflows, and many tests running to validate each feature. This section offers a detailed insight into the repository, providing a better understanding of its structure and the particulars of working with it.
The root of the repository is organized into several folders, each serving a specific purpose. The .github  folder contains the issue templates that define the list of issue templates on GitHub. The build folder is responsible for building everything in CI. It’s complex, with many operations executing during CI. Then there’s the docs folder, housing all the necessary documentation. The most interesting part is the src folder, which contains the source code.
The source code in the repository is extensive and includes many different projects. The most crucial are:
But there are tens of others, so to make it easier to understand, please see the video included at the end of the article, specifically around the 53-minute mark – https://www.youtube.com/watch?v=6h3r0Uk750M&t=3177s
The platform is extensive and includes many platforms: Android, iOS, Mac OS, Mac Catalyst, Skia WPF, Skia GTK, Skia Linux Framebuffer, WebAssembly, and Windows. Loading all of these targets at once in Visual Studio would be overwhelming. Instead, you can use the cross-targeting props file to pick a specific platform that you want to build against. See https://platform.uno/docs/articles/uno-development/building-uno-ui.html#building-unoui-for-a-single-target-platform for more details.
You are now equipped to participate actively in the Uno Platform community. Once you’re ready to start contributing, the first step is to head to the Uno Platform’s GitHub page and then take a plunge! Whether you’re fixing bugs, implementing new features, or simply sharing your Uno experience, your contribution matters.Â
Remember, it’s normal to feel overwhelmed when diving into a new area of the code, but with time and practice, it gets easier. Don’t be afraid to ask questions and seek help from other team members. And most importantly, choose areas that interest you and where you can make the most impact.
To upgrade to the latest release of Uno Platform, please update your packages to 4.10 via your Visual Studio NuGet package manager! If you are new to Uno Platform, following our official getting started, guide is the best way to get started. (5 min to complete)
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