Handle .flatpakrepo files

[cassidyjames]

Flatpak supports .flatpakrepo files to add a repo without installing an app. GNOME Software seems to handle this and adds the repo. If we want feature parity there, we could support opening and adding a repo file. This would require a new screen specifically for repos that details the implications.

This seems to be a sticking point for them to let us update the instructions at Flatpak.org without directing users to the Terminal: https://github.com/flatpak/flatpak.github.io/pull/355

[cassidyjames]

I'd like to take a look at this again. I'll work on some design/copy and then would @davidmhewitt be able/willing to work on it? 😅

[davidmhewitt]

For sure! I'll look at what's involved tomorrow and pull together a basic dialog that you can iterate designs/copy on.

[cassidyjames]

Rough thoughts on copy, modeling after the app install copy:

Add untrusted software source “Flathub”?

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[Oymate]

Also .flatpakref

[cassidyjames]

@Oymate that's literally what Sideload already does. ;) If you mean .flatpak bundles, that is filed here: https://github.com/elementary/sideload/issues/75