Decentraland Godot Rust

Set up project

1. Clone the repo using git clone https://github.com/decentraland/godot-explorer

• If you're in Windows we suggest to clone the repo in a very short path like C:/gexplorer due https://developercommunity.visualstudio.com/t/clexe-compiler-driver-cannot-handle-long-file-path/975889

2. Install rust

3. Download and install third party libraries

   • Linux (apt-get based):
     • Install alsa and udev: sudo apt-get update; sudo apt-get install --no-install-recommends libasound2-dev libudev-dev
     • Install ffmpeg deps: sudo apt install -y --no-install-recommends clang curl pkg-config libavcodec-dev libavformat-dev libavutil-dev libavfilter-dev libavdevice-dev
     • Install Livekit deps: sudo apt update -y; sudo apt install -y libssl-dev libx11-dev libgl1-mesa-dev libxext-dev
   • MacOS: brew install ffmpeg@6 pkg-config
   • Windows:
     • download and unzip https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-full-shared.7z
     • set FFMPEG_DIR = root folder where ffmpeg has been unzipped
     • add ffmpeg\bin to your PATH
     • set LIBCLANG_PATH = path to LLVM\x64\bin (this is packaged with visual studio, or can be downloaded separately)
   • the .github/workflows/ci.yml file can be useful to guide you

4. Run cargo run -- install --platforms linux in the repo root folder (change linux to your target platform).

Running and editing the project

1. Ensure you are in the root folder first
2. You can run cargo run -- run to build the Rust library and execute the client.

• With adding -r it builds the library in release mode. Note: the Godot executable is an editor, so it's a release_debug build, see the Target section here for more information.
• With adding -e it also builds the library, but the project edition is executed instead of the client.

Docker Set up project with Docker (for Android and Linux)

Execute the following commands for building Godot:

# Run Docker
docker run -v {godot-explorer-repo-path}:/app/ -it quay.io/decentraland/dcl-godot-android-builder:99091016236094cb776bd9cb1298602e56b8cdab

# Compile for Android
cd lib
./android-build.sh # arm64
./android-build.sh x86_64 # android x86_64 if needed
cd ../../ # return

# Compile for Linux
cargo run -- install --platforms android
cargo run -- run --only-build
cd ../../ # return

# Generate .APK
## Download Android Template, only one time needed
cd godot/
git clone https://github.com/decentraland/godot-explorer-android-template.git android # Only one time
cd ../

## Build Android and Export APK for arm64
./build-android-apk.sh

Contributing

More details on CONTRIBUTING.md

Debugging the library

This repo is set up to be opened with Visual Studio Code. In the section Run and Debug in the Activity bar, you can find the configuration for your platform.

Run test with coverage

1. Ensure you are in the root folder first
2. Run cargo run -- coverage --dev. It'll create a coverage folder with the index.html with the all information. In order to run these commands, you need to have llvm-tools and grcov installed. You can install them with rustup component add llvm-tools-preview and cargo install grcov.

Mobile targets

See lib/builds.md

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