Setup Flatpak Build Environment

# FlatPak 6.7 works but 6.9 fails

# with Raspberry Pi 5:
# bwrap: execvp appstream-compose: No such file or directory

# with Ubuntu 24.04:
# /usr/lib/gcc/x86_64-unknown-linux-gnu/14.3.0/../../../../x86_64-unknown-linux-gnu/bin/ld: cannot find -lGLU: No such file or directory
# even though modules has
# - shared-modules/glu/glu-9.json

# So build with 6.7 for now

Steps

1. Install Flatpak

   Install Flatpak and add the Flathub repository:

   sudo apt install flatpak
   flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
   sudo reboot
   

2. Install Flatpak Builder

   sudo apt install flatpak-builder
   

3. Install KDE Platform

   Select version 6.7 when prompted.

   flatpak install flathub org.kde.Platform
   

4. Install the KDE SDK:

   Select version 6.7 when prompted.

   flatpak install flathub org.kde.Sdk
   

   To list available versions:

   flatpak -vv remote-ls flathub
   

5. Clone the NoLimitConnect project:

   git clone https://gitlab.com/nolimitconnectapps/nolimitapp.git
   cd nolimitapp
   

6. Enable Flatpak Submodules (Required for GL/glu)

   Add the shared modules:

   git submodule add https://github.com/flathub/shared-modules.git -f