# Contributing

## Directory structure
```
frontend/
  public/        ; Static files
  src/           ; React/Typescript sourcecode

backend/
  compilers/     ; Compiler binaries and configuration
  coreapp/       ; API Django app
    migrations/  ; Database migrations (generated by Django)
  decompme/      ; Main Django app
  libraries/     ; Library headers

.env             ; Default configuration
.env.local       ; Local configuration overrides (not checked-in)
```

## Setup

We use [Docker](https://docker.com) for both development and production environments — it’s the simplest way to get everything up and running. See [DOCKER.md](DOCKER.md) for detailed setup instructions.

We officially support running decomp.me on Linux (we use Ubuntu 24.04 LTS) on the `amd64` architecture. Running decomp.me natively on Windows or macOS is not supported and may result in unpredictable behavior or missing functionality. The instructions below assume you are using a Linux system on `x86_64` hardware.

### Prerequisites

Dependencies:
- Python >=3.10 (Production uses 3.12)
- Node.js >=14 <=24 (Production uses 24)
- [Yarn](https://yarnpkg.com/getting-started/install)
- [uv](https://docs.astral.sh/uv/getting-started/installation/)

---
Create a file to hold environment variables:
```shell
touch .env.local
```

### Backend
```shell
cd backend
```

* Install Python dependencies with [uv](https://docs.astral.sh/uv/getting-started/installation/)

```shell
uv sync
```

- Install compilers
```shell
uv run python compilers/download.py
```

- Install libraries
```shell
uv run python libraries/download.py
```

- Set up the database
```shell
uv run python manage.py migrate
```

- Start the API server
```shell
uv run python manage.py runserver
```

---

### Frontend
```shell
cd frontend
```

- Install dependencies
```shell
yarn
```

- Start the development webserver
```shell
yarn dev
```

- Access the site via [http://localhost:8080](http://localhost:8080)


### Optional steps
- [Configure vscode for development](VSCODE.md)
- [Configure wine for Windows compiler on Linux](WINE.md)
- [Set up GitHub authentication](GITHUB.md)
- [Install nsjail to run the compiler sandbox](SANDBOX.md)
- [Configure an nginx reverse proxy](NGINX.md)
- Download [wibo](https://github.com/decompals/WiBo/releases/latest) and add it to your system path (for running Windows compilers from Linux)


## Notes

### Updating the database

If you modify any database models (`models.py`), you'll need to run the following to update the database:
```shell
uv run python manage.py makemigrations
uv run python manage.py migrate
```

### Running tests

To ensure everything is working properly, you can run the unit tests in the backend folder.

```shell
uv run python manage.py test
```

### Frontend styling

We use Tailwind CSS with Radix UI colors. Each color is on a scale from 1 to 12 (inclusive), each with [a well-defined meaning](https://www.radix-ui.com/docs/colors/palette-composition/understanding-the-scale).

## Linting

- Check frontend
```shell
cd frontend
yarn lint
```

- Autofix frontend
```shell
cd frontend
yarn lint --fix
```

- Check backend
```shell
cd backend
uv run mypy
uv run ruff check .
uv run ruff format .
```