Trouble building my game as a Flatpak

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1

Godot Version

4.2.1 stable

Question

I’m trying to build my game as a Flatpak using the Godot base app here: GitHub - flathub/org.godotengine.godot.BaseApp

The Flatpak builds without errors, but when I try to run it I get this error:

ERROR: Pack version unsupported: 2.
Error: Couldn't load project data at path ".". Is the .pck file missing?

This is my manifest:

app-id: org.myuser.GodotApp
runtime: org.freedesktop.Platform
runtime-version: '23.08'
sdk: org.freedesktop.Sdk
base: org.godotengine.godot.BaseApp
base-version: '3.5-23.08'
command: godot-runner
finish-args:
  - --share=ipc
  - --socket=x11
  - --socket=pulseaudio
  - --device=dri
modules:
  - name: GodotApp
    buildsystem: simple
    build-commands:
      - install GodotApp.pck /app/bin/godot-runner.pck
    sources:
      - type: file
        path: GodotApp.pck

I have GodotApp.x86_64 and GodotApp.pck in the current working directory when I run flatpak_builder. I’m new to Flatpaks so I might be doing something wrong, but I can’t figure out what the problem is.

2

Check the Material Maker Flatpak manifest for an example: io.github.RodZill4.Material-Maker/io.github.RodZill4.Material-Maker.yaml at master · flathub/io.github.RodZill4.Material-Maker · GitHub

Or Pixelorama’s Flatpak manifest: https://github.com/flathub/com.orama_interactive.Pixelorama/blob/master/com.orama_interactive.Pixelorama.yaml

3

Thanks for the references. I’ve made changes to my manifest accordingly (not all of it is applicable as I have a very basic project that only needs an executable and .pck to run) but for some reason I am still unable to get it to work. I have even tried loading the .pck from a URL, and get the same error.

What’s even stranger is when I go to the directory the flatpak binary data is held, launcher.pck is present alongside the godot-runner and launcher executables as you would expect. I can also build and run the two flatpaks you referenced no problem on my end so I am really not sure what’s wrong with mine. Perhaps I’m overlooking something obvious.

This is my manifest currently:

app-id: com.redacted.Launcher
base: org.godotengine.godot.BaseApp
base-version: '3.5-23.08'
runtime: org.freedesktop.Platform
runtime-version: '23.08'
sdk: org.freedesktop.Sdk
command: launcher

finish-args:
  - --share=ipc
  - --socket=x11
  - --filesystem=home
  - --device=dri
  - --share=network

modules:
  - name: launcher
    buildsystem: simple

    sources:
      - type: file
        path: launcher.pck
        sha256: sha-hash-here

      - type: script
        dest-filename: launcher.sh
        commands:
          - cd /app/bin/
          - /app/bin/godot-runner --audio-driver Dummy --main-pack /app/bin/launcher.pck "$@"
    
    build-commands:
    - install -Dm755 launcher.sh /app/bin/launcher
    - install -Dm644 launcher.pck /app/bin/launcher.pck