Development discussions happen on #ddnet on Quakenet ([Webchat](http://webchat.quakenet.org/?channels=ddnet&uio=d4)) or on [Discord in the developer channel](https://discord.gg/xsEd9xu).
You can get binary releases on the [DDNet website](https://ddnet.org/downloads/), find it on [Steam](https://store.steampowered.com/app/412220/DDraceNetwork/) or [install from repository](#installation-from-repository).
You can install the required libraries on your system, `touch CMakeLists.txt` and CMake will use the system-wide libraries by default. You can install all required dependencies and CMake on Debian or Ubuntu like this:
On older distributions like Ubuntu 18.04 don't install `google-mock`, but instead set `-DDOWNLOAD_GTEST=ON` when building to get a more recent gtest/gmock version.
Pass the number of threads for compilation to `make -j`. `$(nproc)` in this case returns the number of processing units.
DDNet requires additional libraries, some of which are bundled for the most common platforms (Windows, Mac, Linux, all x86 and x86\_64) for convenience and the official builds. The bundled libraries for official builds are now in the ddnet-libs submodule. Note that when you build and develop locally, you should ideally use your system's package manager to install the dependencies, instead of relying on ddnet-libs submodule, which does not contain all dependencies anyway (e.g. openssl, vulkan). See the previous section for how to get the dependencies. Alternatively see the following build arguments for how to disable some features and their dependencies (`-DVULKAN=OFF` won't require Vulkan for example).
The following is a non-exhaustive list of build arguments that can be passed to the `cmake` command-line tool in order to enable or disable options in build time:
An optional CMake variable for setting the build type. If not set, defaults to "Release" if `-DDEV=ON` is **not** used, and "Debug" if `-DDEV=ON` is used. See `CMAKE_BUILD_TYPE` in CMake Documentation for more information.
Whether to prefer bundled libraries over system libraries. Setting to ON will make DDNet use third party libraries available in the `ddnet-libs` folder, which is the git-submodule target of the [ddnet-libs](https://github.com/ddnet/ddnet-libs) repository mentioned above -- Useful if you do not have those libraries installed and want to avoid building them. If set to OFF, will only use bundled libraries when system libraries are not found. Default value is OFF.
Whether to enable MySQL/MariaDB support for server. Requires at least MySQL 8.0 or MariaDB 10.2. Setting to ON requires the `libmariadbclient-dev` library installed, which are also provided as bundled libraries for the common platforms. Default value is OFF.
Note that the bundled MySQL libraries might not work properly on your system. If you run into connection problems with the MySQL server, for example that it connects as root while you chose another user, make sure to install your system libraries for the MySQL client. Make sure that the CMake configuration summary says that it found MySQL libs that were not bundled (no "using bundled libs").
Whether to download and compile GTest. Useful if GTest is not installed and, for Linux users, there is no suitable package providing it. Default value is OFF.
Whether to optimize for development, speeding up the compilation process a little. If enabled, don't generate stuff necessary for packaging. Setting to ON will set CMAKE\_BUILD\_TYPE to Debug by default. Default value is OFF.
Use the Ninja build system instead of Make. This automatically parallizes the build and is generally faster. Compile with `ninja` instead of `make`. Install Ninja with `sudo apt install ninja-build` on Debian, `sudo pacman -S --needed ninja` on Arch Linux.
Custom flags to set for compiler when linking. With clang++ as the compiler this can be [used to link](https://github.com/rui314/mold#how-to-use) with [mold](https://github.com/rui314/mold), speeds up linking by a factor of ~10:
We use clang-format 10 to format the C++ code of this project. Execute `scripts/fix_style.py` after changing the code to ensure code is formatted properly, a GitHub central style checker will do the same and prevent your change from being submitted.
On Arch Linux you can install clang-format 10 using the [clang-format-static-bin AUR package](https://aur.archlinux.org/packages/clang-format-static-bin/). On macOS you can install clang-format 10 using a [homebrew tap](https://github.com/r-lib/homebrew-taps):
Download and install some version of [Microsoft Visual Studio](https://www.visualstudio.com/) (as of writing, MSVS Community 2017) with **C++ support**, install [Python 3](https://www.python.org/downloads/) **for all users** and install [CMake](https://cmake.org/download/#latest).
Start CMake and select the source code folder (where DDNet resides, the directory with `CMakeLists.txt`). Additionally select a build folder, e.g. create a build subdirectory in the source code directory. Click "Configure" and select the Visual Studio generator (it should be pre-selected, so pressing "Finish" will suffice). After configuration finishes and the "Generate" reactivates, click it. When that finishes, click "Open Project". Visual Studio should open. You can compile the DDNet client by right-clicking the DDNet project (not the solution) and select "Select as StartUp project". Now you should be able to compile DDNet by clicking the green, triangular "Run" button.
Then run `emcmake cmake .. -DVIDEORECORDER=OFF -DVULKAN=OFF -DSERVER=OFF -DTOOLS=OFF -DPREFER_BUNDLED_LIBS=ON` in your build directory.
To test the compiled code locally, just use `emrun --browser firefox DDNet.html`
To host the compiled .html file copy all `.data`, `.html`, `.js`, `.wasm` files to the web server. (see /other/emscripten/minimal.html for a minimal html example)
Then enable cross origin policies. Example for apache2 on debian based distros:
```bash
sudo a2enmod header
# edit the apache2 config to allow .htaccess files
sudo nano /etc/apache2/apache2.conf
# set AllowOverride to All for your directory
# then create a .htaccess file on the web server (where the .html is)
MariaDB [(none)]> create database teeworlds; create user 'teeworlds'@'localhost' identified by 'PW2'; grant all privileges on teeworlds.* to 'teeworlds'@'localhost'; flush privileges;
# this takes a while, you can remove the KEYs in record_race.sql to trade performance in queries
$ mysql -u teeworlds -p'PW2' teeworlds <ddnet-sql/record_*.sql
$ cat mine.cfg
sv_use_sql 1
add_sqlserver r teeworlds record teeworlds "PW2" "localhost" "3306"
add_sqlserver w teeworlds record teeworlds "PW2" "localhost" "3306"
DDNet is available in the [Phoronix Test Suite](https://openbenchmarking.org/test/pts/ddnet). If you have PTS installed you can easily benchmark DDNet on your own system like this:
