Optional compilation

[alex-w]

Expected Behaviour

Optional compilation (for example without GUI) is working

Actual Behaviour

Compilation after configuration with option -DSTELLARIUM_GUI_MODE=None is not possible. I fear compilation without scripting can be broken too.

P.S. After resolving problems we can add checks some optional compilations in CI

[gzotti]

Certainly possible. I have not tried None in the past 8 years or so. While I don't see the actual necessity for None, it is a pre-requisite for starting any alternative GUIs of course. Likewise with scripting, the focus was on running with either QtScript (Qt5) or QML (Qt6), not disabling it completely.

[alex-w]

OK, at least for all documented modular features optional compilation is working - see linked branch.

[alex-w]

Well, at the moment only -DSTELLARIUM_GUI_MODE=None has broken and without alternative GUI it’s not critical option. Of course, in the future (when new optional GUI will be added) we should refactored calling GUI features in the core (hello to screenshots for example).