How to create YAML for a simple Godot 3 engine project game, how to create snap?

snapcraft
2

I took a sample project and built/exported it as a “Linux/X11” application and build a snap as follows.

snap install snapcraft --candidate --classic

snap install multipass --beta --classic

I then made a godot_game directory and within it snap/snapcraft.yaml and gamefiles folder. Inside the gamefiles folder which contains the export of the game. Here’s the output of tree so it makes sense.

alan@hal:~/Source/godot_game$ tree
.
├── gamefiles
│   ├── Isometric Game.pck
│   └── Isometric Game.x86_64
├── isometric-game_1.0_amd64.snap
└── snap
    └── snapcraft.yaml

2 directories, 4 files

Here’s the snap/snapcraft.yaml which references the gamefiles/directory and dumps that into the snap. It also stages the minimum necessary packages.

name: isometric-game
base: core18
version: '1.0'
summary: Isometric Game
description: |
  A simple game made in Godot

grade: stable
confinement: strict

apps:
  isometric-game:
    command: desktop-launch "$SNAP/Isometric Game.x86_64"
    environment:
      LD_LIBRARY_PATH: "$LD_LIBRARY_PATH:/usr/lib/$SNAPCRAFT_ARCH_TRIPLET/pulseaudio"
    plugs:
      - opengl
      - network
      - network-bind
      - pulseaudio
      - x11
      - desktop
      - joystick

parts:
  game:
    plugin: dump
    source: gamefiles/
    after: [desktop-glib-only]
    stage-packages:
      - libgl1-mesa-dri
      - libglu1-mesa
      - libgl1-mesa-glx
      - libpulse0
      - libxcursor1
      - libxinerama1
      - libxrandr2
      - libxi6
      - libasound2
  desktop-glib-only:  
        build-packages:
          - libglib2.0-dev
        plugin: make
        source: https://github.com/ubuntu/snapcraft-desktop-helpers.git
        source-subdir: glib-only
        stage-packages:
          - libglib2.0-bin

Once all that is done just run snapcraft from within the godot_game folder and it should produce a snap which ends like this:

Priming game 
Snapping 'isometric-game' \                                                                                                                                   
Snapped isometric-game_1.0_amd64.snap

Install the snap:-

sudo snap install isometric-game_1.0_amd64.snap --dangerous

Run it with:-

isometric-game

And it should launch fine. There’s further work to do to add a desktop file and icon, but that should get you started. Let us know how you get on.

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