I realise that this is an old topic now, but I've just been revisiting this with GNOME on my Fedora 40 setup and I'm unable to build it (Meson complaints in part).

I know Joplin these days supports the ability to open a specific note via xdg-open of a joplin://x-callback-url scheme.

I noticed that other apps ship GNOME search providers in their flatpaks e.g. Folio's lands in /var/lib/flatpak/exports/share/gnome-shell/search-providers/ and then integrates directly with the desktop, which is really nice.

Any thoughts on reviving this work? Has anyone else built a GNOME search provider for Joplin?