setup.sh

#!/bin/bash

echo 'at=lxd-config msg="Init LXD"'
cat <<EOF | sudo lxd init --preseed
config:
  core.https_address: '[::]:8443'
  core.trust_password: password
networks:
- config:
    ipv4.address: auto
    ipv6.address: auto
  description: ""
  managed: false
  name: lxdbr0
  type: ""
storage_pools:
- config:
    size: 15GB
  description: ""
  name: default
  driver: btrfs
profiles:
- config: {}
  description: ""
  devices:
    eth0:
      name: eth0
      nictype: bridged
      parent: lxdbr0
      type: nic
    root:
      path: /
      pool: default
      type: disk
  name: default
cluster: null
EOF

echo 'at=display-setup msg="Install apt dependencies"'
sudo apt-get install \
  snapcraft \
  libgl1-mesa-dri \
  xwayland \
  mir-graphics-drivers-desktop \
  mir-demos \
  mesa-utils

echo 'at=snap-build msg="Create the snap"'
mkdir ~/glxgears-example
cat <<EOF > ~/glxgears-example/snapcraft.yaml
name: glxgears-example
version: 0.1
summary: glxgears example kiosk
description: |
  glxgears example X11 kiosk, using Xwayland and Wayland
confinement: classic
grade: devel

apps:
  glxgears-example:
    command: xwayland-kiosk-launch glxgears
    environment:
      XWAYLAND_FULLSCREEN_WINDOW_HINT: title="glxgears"
    plugs:
      - opengl
      - wayland

parts:
  glxgears:
    plugin: nil
    after: [ xwayland-kiosk-helper ]
    stage-packages:
      - mesa-utils
EOF

cd glxgears-example
snapcraft cleanbuild

# sudo su - root
# try this next
# sudo -H -u root miral-kiosk &
# miral-kiosk &
# sudo snap install --dangerous ./glxgears-kiosk_0.1_amd64.snap --devmode
# sudo snap run glxgears-kiosk