# Contributing to Redox

**Thank you for your interest in contributing to Redox!**

This document will outline the basics of where to start if you wish to contribute to the project. There are many ways to help us out and and we appreciate all of them. We look forward to **your contribution!**

**Please read this document until the end**

## Code Of Conduct

We follow the [Rust Code Of Conduct](https://www.rust-lang.org/policies/code-of-conduct).

## License

In general, your contributions to Redox are governed by the [MIT License](https://en.wikipedia.org/wiki/MIT_License). Each project repository has a `LICENSE` file that provides the license terms for that project.

Please review the `LICENSE` file for the project you are contributing to.

[This](https://doc.redox-os.org/book/philosophy.html) page we explain why we use the MIT license.

## Contribution Terms

When making a contribution you agree to the following terms:

- I understand these changes in full and will be able to respond to review comments.
- I have read the [Developer Certificate of Origin](https://developercertificate.org/) and certify my contribution under its conditions.

## AI Policy

Redox OS does not accept contributions generated by LLMs ([Large Language Models](https://en.wikipedia.org/wiki/Large_language_model)), sometimes also referred to as "AI". This policy is not open to discussion, any content submitted that is clearly labelled as LLM-generated (including issues, merge requests, and merge request descriptions) will be immediately closed, and any attempt to bypass this policy will result in a ban from the project.

## Chat

You can join in our chat platforms to discuss development, issues or ask questions.

### [Matrix](https://matrix.to/#/#redox-join:matrix.org)

Matrix is the official way to talk with Redox OS team and community (these rooms are English-only, we don't accept other languages because we don't understand them).

Matrix has several different clients. [Element](https://element.io/) is a commonly used choice, it works on web browsers, Linux, MacOSX, Windows, Android and iOS.

If you have problems with Element, try [Fractal](https://gitlab.gnome.org/World/fractal).

- Join the [Join Requests](https://matrix.to/#/#redox-join:matrix.org) room and send a message requesting for an invite to the Redox Matrix space (the purpose of this is to avoid spam and bots).
- #redox-join:matrix.org (Use this Matrix room address if you don't want to use the external Matrix link)

(We recommend that you leave the "Join Requests" room after your entry on Redox space)

If you want to have a big discussion in our rooms, you should use a Element thread, it's more organized and easy to keep track if more discussions happen on the same room.

You cand find more information on the [Chat](https://doc.redox-os.org/book/chat.html) page.

### [Discord](https://discord.gg/JfggvrHGDY)

We have a Discord server as an alternative for Matrix, open the #join-requests channel and send a message requesting to be a member (the purpose of this is to avoid spam and bots)

The Matrix messages are sent to Discord and vice-versa using a bot, but sometimes some Discord messages aren't sent to Matrix (if this happens to you join in our Matrix space above)

## [GitLab](https://gitlab.redox-os.org/redox-os/redox)

A slightly more formal way of communication with fellow Redox developers, but a little less quick and convenient like the chat. Submit an issue when you run into problems compiling or testing. Issues can also be used if you would like to discuss a certain topic: be it features, code style, code inconsistencies, minor changes and fixes, etc.

If you want to create an account, read the [Signing in to GitLab](https://doc.redox-os.org/book/signing-in-to-gitlab.html) page.

Once you create an issue don't forget to post the link on the Dev or Support rooms of the chat, because the GitLab email notifications have distractions (service messages or spam) and most developers don't left their GitLab pages open to receive desktop notifications from the web browser (which require a custom setting to receive issue notifications).

By doing this you help us to pay attention to your issues and avoid them to be accidentally forgotten.

If you have ready MRs (merge requests) you must send the links in the [MRs](https://matrix.to/#/#redox-mrs:matrix.org) room. To join this room, you will need to request an invite in the [Join Requests](https://matrix.to/#/#redox-join:matrix.org) room.

By sending a message in the room, your MR will not be forgotten or accumulate conflicts.

## Best Practices and Guidelines

You can read the best practices and guidelines on the [Best practices and guidelines](https://doc.redox-os.org/book/best-practices.html) chapter.

## Development Recommendations and Tips

- Copy-paste prevent and reduce typos
- Read the entire [Build System Reference](https://doc.redox-os.org/book/build-system-reference.html) and [Developer FAQ](https://doc.redox-os.org/book/developer-faq.html) pages
- Make sure your build system is up-to-date, read the [Update The Build System](https://doc.redox-os.org/book/build-system-reference.html#update-the-build-system) section if in doubt.
- If you want to make local changes in recipe sources it's recommended to automatic recipe source update, read [this](https://doc.redox-os.org/book/configuration-settings.html#local-recipe-changes) section to learn how to this for one or multiple recipes and [this](https://doc.redox-os.org/book/configuration-settings.html#cookbook-offline-mode) section for all recipes.
- If you want to make changes to system components, drivers or RedoxFS you need to manually update initfs, read [this](https://doc.redox-os.org/book/coding-and-building.html#how-to-update-initfs) section to learn how to do that.
- If some program can't build or work, something can be missing/hiding on [relibc](https://gitlab.redox-os.org/redox-os/relibc), like a POSIX/Linux function or bug.
- If you have some error on QEMU remember to test different settings or verify your operating system (Pop_OS!, Ubuntu, Debian and Fedora are the recommend Linux distributions to do testing/development for Redox).
- Remember to log all errors, you can use this command as example:

```sh
your-command 2>&1 | tee file-name.log
```

- If you have a problem that seems to not have a solution, think on simple/stupid things. Sometimes you are very confident on your method and forget obvious things (very common).
- If you want a quick review of your Merge Request, make it small.
- If your big Merge Request is taking too long to be reviewed and merged try to split it in small MRs. But make sure it don't break anything, if this method break your changes, don't shrink.

## Style Guidelines

### Rust

Since **Rust** is a relatively small and new language compared to others like C and C++, there's really only one standard. Just follow the official Rust standards for formatting, and maybe run `rustfmt` on your changes, until we setup the CI system to do it automatically.

### Git

Please follow our [Git style](https://doc.redox-os.org/book/creating-proper-pull-requests.html) for pull requests.

## GitLab

### Identity

Once your GitLab account is created, you should add your Matrix or Discord username (the name after the `@` symbol) on the "About" section of your profile, that way we recognize you properly.

### Issues

We use issues to organize and track our current and pending work, to know how to create issues on the Redox GitLab read the [Filing Issues](https://doc.redox-os.org/book/filing-issues.html) page.

Once you create an issue don't forget to post the link on the Dev or Support rooms of the chat, because the GitLab email notifications have distractions (service messages or spam) and most developers don't left their GitLab pages open to receive desktop notifications from the web browser (which require a custom setting to receive issue notifications).

By doing this you help us to pay attention to your issues and avoid them to be accidentally forgotten.

You can see all issues on [this](https://gitlab.redox-os.org/groups/redox-os/-/issues) link.

### Pull Requests

Please follow [our process](https://doc.redox-os.org/book/creating-proper-pull-requests.html) for creating proper pull requests.

## Important Places to Contribute

Before starting to contribute, we recommend reading the [General FAQ](https://www.redox-os.org/faq/) and the [Redox Book](https://doc.redox-os.org/book/).

You can contribute to the Redox documentation and code on the following repositories (non-exhaustive, easiest-to-hardest order):

- [Website](https://gitlab.redox-os.org/redox-os/website)
- [Book](https://gitlab.redox-os.org/redox-os/book) - High-level documentation
- [Build System Configuration](https://gitlab.redox-os.org/redox-os/redox) - Our main repository
- [Orbital](https://gitlab.redox-os.org/redox-os/orbital) - Display Server and Window Manager
- [pkgutils](https://gitlab.redox-os.org/redox-os/pkgutils) - Package Manager
- [acid](https://gitlab.redox-os.org/redox-os/acid) - Redox Test Suite
- [relibc](https://gitlab.redox-os.org/redox-os/relibc) - Redox C Library
- [libredox](https://gitlab.redox-os.org/redox-os/libredox) - Redox System Library
- [Bootloader](https://gitlab.redox-os.org/redox-os/bootloader)
- [RedoxFS](https://gitlab.redox-os.org/redox-os/redoxfs) - Default filesystem
- [Base](https://gitlab.redox-os.org/redox-os/base) - Essential system components and drivers
- [Kernel](https://gitlab.redox-os.org/redox-os/kernel)

To see all Redox repositories open the [redox-os group](https://gitlab.redox-os.org/redox-os).

### Skill Levels

If you don't know programming:

- Test the [daily images](https://static.redox-os.org/img/) on your computer and add the report on the [Hardware Compatibility](https://gitlab.redox-os.org/redox-os/redox/-/blob/master/HARDWARE.md) list
- Monitor and warn developers if the [daily images](https://static.redox-os.org/img/) are outdated
- Use/test Redox and create issues for bugs or needed features (please check for duplicates first)
- Fix and write documentation
- Find or fix typos in configuration

If you don't know how to code in Rust but know other programming languages:

- Web development on the website (we only accept minimal JavaScript code to preserve performance)
- Write unit tests (may require minimal knowledge of Rust)
- Port C/C++ programs to Redox (read the `TODO`s of the recipes on the [WIP category](https://gitlab.redox-os.org/redox-os/redox/-/tree/master/recipes/wip))
- Port programs to Redox

If you know how to code in Rust but don't know operating system development:

- See the [easy](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=easy) issues
- See the "[good first issue](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=good%20first%20issue)" issues
- See the [help wanted](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=help%20wanted) issues (it's worth noting the skill level varies between projects, but a large subset of these should be approachable by contributors familiar with regular Rust/Unix application programming)
- Improve the package manager, or build system tooling like `redoxer` or `installer`
- Improve the [Ion](https://gitlab.redox-os.org/redox-os/ion) shell, or other high-level or mid-level projects
- Port Rust programs (also look for issues with the `port` label)
- Improve application compatibility in relibc by e.g. implementing missing POSIX/Linux functions

If you know how to code in Rust, and have experience with systems software/OS development:

- Familiarize yourself with the repository layout, code, and build system
- Update old code to remove warnings
- Search for `TODO`, `FIXME`, `BUG`, `UNOPTIMIZED`, `REWRITEME`, `DOCME`, and `PRETTYFYME` and fix the code you find
- Look in general for issues with the following labels: `critical`, `help wanted`, `feature`, `enhancement`, `bug` or `port`
- Improve internal libraries and abstractions, e.g. `libredox`, `redox-scheme`, `redox-event` etc.
- Help upstream Redox-specific functionality to the Rust ecosystem
- Improve Redox's automated testing suite and continuous integration testing processes
- Improve, profile, and optimize code, especially in the kernel, filesystem, and network stack
- Improve or write device drivers

For those who want to contribute to the Redox GUI, our GUI strategy has changed.

- We are improving the [Orbital](https://gitlab.redox-os.org/redox-os/orbital) display server and window manager, you can read more about it on [this tracking issue](https://gitlab.redox-os.org/redox-os/redox/-/issues/1430).
- OrbTk is in maintenance mode, and its developers have moved to other projects such as the ones below. There is currently no Redox-specific GUI development underway.

## Priorities

You can use the following GitLab issue label filters to know our development priorities on the moment:

- [Critical](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=critical)
- [High-priority](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=high-priority)
- [Medium-priority](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=medium-priority)
- [Low-priority](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=low-priority)

## Roadmap

We use tracking issues for the goals in our roadmap, you can see them in the filter below:

- [Tracking issues](https://gitlab.redox-os.org/groups/redox-os/-/issues/?label_name[]=tracking%20issue)

## RFCs

For more significant changes that affect Redox's architecture, we use the [Request for Comments](https://gitlab.redox-os.org/redox-os/rfcs) repository.

## Build System

To download the build system use the following commands:

(You need to have [curl](https://curl.se/) installed on your system)

```sh
curl -sf https://gitlab.redox-os.org/redox-os/redox/raw/master/podman_bootstrap.sh -o podman_bootstrap.sh
```

```sh
time bash -e podman_bootstrap.sh
```

To start the compilation of the default recipes run the command below:

```sh
make all
```

In case your operating system does not use SELinux, you must set the `USE_SELINUX` to `0` when calling `make all`, otherwise you might experience errors:

```sh
make all USE_SELINUX=0
```

You can find the build system organization and commands on the [Build System](https://doc.redox-os.org/book/build-system-reference.html) page.

## Developer FAQ

You can see the most common questions and problems on the [Developer FAQ](https://doc.redox-os.org/book/developer-faq.html) page.

## Porting Software

You can read how to use the Cookbook recipe system to port applications on the [Application Porting](https://doc.redox-os.org/book/porting-applications.html) page.

**Always verify if a recipe for your program or library already exist before porting to not break the build system with a recipe duplication or waste time.**

## Libraries and APIs

You can read the [Libraries and APIs](https://doc.redox-os.org/book/libraries-apis.html) page to learn about the libraries and APIs used in Redox.

## Visual Studio Code (VS Code) Configuration

To learn how to configure your VS Code to do Redox development please read the information below the [Visual Studio Code Configuration](https://doc.redox-os.org/book/coding-and-building.html#visual-studio-code-configuration) section.

## References

We maintain a list of wikis, articles and videos to learn Rust, OS development and computer science on the [References](https://doc.redox-os.org/book/references.html) page.

If you are skilled/experienced there's still a possibility that they could improve your knowledge in some way.

## Other Ways to Contribute

If you aren't good on coding, but you still want to help keep the project going, you can contribute and support in a variety of ways! We'll try to find a way to use anything you have to offer. 

### Design

If you're a good designer, whether it's 2D graphics, 3D graphics, interfaces, web design, you can help. We need logos, UI design, UI skins, app icons, desktop backgrounds, etc.

- [Redox backgrounds](https://gitlab.redox-os.org/redox-os/backgrounds) - You can send your wallpapers on this repository.
- [Redox assets](https://gitlab.redox-os.org/redox-os/assets) - You can send your logos, icons and themes on this repository.

If you have questions about the graphic design, ask us on the [Chat](https://doc.redox-os.org/book/chat.html).

### Donate to Redox

If you are interested in donating to the Redox OS Nonprofit, you can find instructions on the [Donate](https://www.redox-os.org/donate/) page.
