* sudo apt update && sudo apt install flatpak flatpak-builder
  * flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo

• get list of runtime versions: flatpak remote-ls --user flathub --runtime | grep org.freedesktop.Sdk
  • --user says “as my user” as there could also be an install in system that conflicts
  • flathub is the repo (not related to user)
  • versioning is by date. Future dates mean unstable (dev) versions

app-id: org.vrui.Vrui # needs to be unique especially if put in public repo
runtime: org.freedesktop.Platform
runtime-version: '24.08'
sdk: org.freedesktop.Sdk
command: VruiSoundTest  # Just a placeholder for now, you can change this to any Vrui binary
modules:
  - name: vrui
    buildsystem: simple
    build-commands:
      # 1. Create the config file for the Flatpak environment (disabling PulseAudio explicitly)
      - echo "SYSTEM_HAVE_PULSEAUDIO = 0" > BuildRoot/SystemConfiguration.mk
      - echo "VRUI_INSTALL_ROOT = /app" >> BuildRoot/SystemConfiguration.mk
      - echo "SYSTEM_HAVE_DC1394 = 0" >> BuildRoot/SystemConfiguration.mk      
      # 2. Run the build
      - make
      
      # 3. Install (Vrui's makefile usually handles installation if configured, or we copy manually)
      - make install
    sources:
      - type: dir
        path: .  # This assumes you run the builder from the vrui source root

flatpak list              # List installed apps
flatpak search <name>     # Search Flathub
flatpak install <app>     # Install app
flatpak run <app>         # Run app (usually don't need this, desktop launchers work)
flatpak update            # Update everything
flatpak uninstall <app>   # Remove app
flatpak override          # Change permissions. Example: allow musescore to access /tmp: flatpak override --user org.musescore.MuseScore --filesystem=/tmp
flatpak info <app>        # Show details about installed app
flatpak remote-ls flathub # List everything available on Flathub
flatpak repair            # Fix broken installations