Consider replacing QtSingleApplication with something else

[tilosp]

QtSingleApplication relies heavily on pids, this breaks if two client processes get the same pid.
This is for example the case in the flatpak sandbox. See: flathub/com.nextcloud.desktopclient.nextcloud#12

This is why I propose to replace QtSingleApplication with something else.
One alternative would be for example: https://github.com/itay-grudev/SingleApplication

I have opened this issue to get feedback on this idea.

[er-vin]

Yes, I'm totally for replacing QtSingleApplication which is a very old piece of a forked code we're carrying. How would you envision the transition though? I see they recommend git submodule but I'm not too hot on that, that said if it's unpackaged territory we might have no choice...

[fkrull]

But a Git submodule is not any worse than the status quo, right? QtSingleApplication is fully vendored so a submodule would arguably an improvement. And having a vendored-but-working implementation would still be preferable to having a vendored-and-subtly-not-working implementation.

[Rello]

Hello,

thank you for opening the request.
The client has improved a lot since the ticket was opened.
Can you support us and check if it is still relevant? In this case we appreciate a new ticket or a comment here.
Thank you for your support