Now I’m using Debian 12 and I want install Gear Lever (an application for create desktop files from AppImage). So I install Gnome Builder and I can clone the application and I can run it. All the process is straightforward. Now I want install that app but I don’t know what I need to do. Or if I want to use Gear Lever is olny possible via Gnome Builder?
Doing a native install of the app (like in standard system directories for general usage like launching from gnome-shell for all users) would require downstream specific packaging information. This is normally available .spec (for Fedora, RHEL, CentOS etc.) and a debian/ dir (for Debian / Ubuntu) etc, which is not provided by upstream app.
So, doing a native installation would be specific to each distro, and it would be difficult to achieve in GNOME Builder. A per user install of the app in ~/.local/share/applications/ might be possible with wrapper scripts, though.
Flatpak install:
It should be relatively easier to build and install a flatpak, as it’s distro agnostic.
That is my understanding. There may be better answers.
You can build and install the app by using the “Export” item in the build dropdown menu. Builder will generate a Flatpak bundle that you can install from GNOME Software like with any other app.