Oktobat Prototype

A simple Godot + Rust prototype for Linux and Android.

Dependencies

To build for Linux Desktop, you need the following dependencies

• godot 4
• rustup
• just

After that, you can run

just setup

Building

To build the gdextension (aka the Rust plugin) for all platforms, you can use any one of the following commands

just     # automatically executes just all
just a   # alias for all
just all

Note that the first compilation takes a lot longer than all following ones. You can then open the project in the Godot Editor and it should "just work" (TM).

The following sections describe how to build / check certain things faster and are not necessary to try this demo out.

Building just for ...

You can also use

just linux
just android

if you just want to build the binaries for one of the platforms. This (of course) makes the build faster.

Just checking ...

If you are quickly iterating through the Rust code and just want it to be internally consistent. (Without producing a binary!) You can run any one of the following commands:

just check
just c      # alias for check

Preparing to Export for Android

1. Generate a Developer Key (Change user / password as you see fit)

keytool -keyalg RSA -genkeypair -alias androiddebugkey -keypass android -keystore debug.keystore -storepass android -dname "CN=Android Debug,O=Android,C=US"
 -validity 9999 -deststoretype pkcs12

2. Set up Key in Godot

• Top Bar -> Editor -> Editor Settings
• Search for "Android" in the search bar
• Click on Export->Android on the Sidebar
• Set the "Debug Keystore" to the file you just created (debug.keystore)
• Set username to "androiddebugkey" (or the one you used)
• Set password to "android" (or the one you used)

3. Set up Android SDK in Godot

• Stay in the same screen as above
• Set the "Android SDK Path" to "/home/YOURUSERNAMEHERE/Android/Sdk"
• Ensure you have a fitting SDK installed in Android Studio

4. Continue with "Export for Android"

Export for Android

• Top Bar -> Project -> Export
• Select Android in the left bar
• Press the "Export Project" button in the bottom bar
• Select where to put the apk