quasselcore doesn't work because qt5 libs don't have sqlite plugin enabled

[anderspapitto]

I'm on NixOS unstable, the relevant configuration is just services.quassel.enable = true

here's the journalctl logs

Sep 02 15:40:16 thufir systemd[1]: Started Quassel IRC client daemon.                                                                                                                                                                         
Sep 02 15:40:16 thufir quasselcore[18374]: ()                                                                                                                                                                                                 
Sep 02 15:40:16 thufir quasselcore[18374]: Could not initialize any storage backend! Exiting...                                                                                                                                               
Sep 02 15:40:16 thufir quasselcore[18374]: Currently, Quassel supports SQLite3 and PostgreSQL. You need to build your                                                                                                                         
Sep 02 15:40:16 thufir quasselcore[18374]: Qt library with the sqlite or postgres plugin enabled in order for quasselcore                                                                                                                     
Sep 02 15:40:16 thufir quasselcore[18374]: to work.   

[anderspapitto]

I suspect this might be a special case of "QT_PLUGIN_PATH mechanisms do not work from within systemd services"

[globin]

cc @ttuegel

[ttuegel]

Does the Quassel service actually install the daemon into the system environment, or does just put an absolute store path in ExecPath= for the service? If the latter, it (unfortunately) should not be expected to work. If the former, we are probably assuming something is set in the environment that systemd doesn't do.

[orivej]

Quassel puts its store path in ExecPath=. I guess that https://github.com/NixOS/nixpkgs/blob/master/nixos/modules/services/x11/display-managers/sddm.nix is a good example of a Qt service.

[DIzFer]

@ttuegel what does "install the daemon into the system environment" mean in this context?

[orivej]

@DIzFer It means environment.systemPackages = [ sddm ]; and execCmd = "exec /run/current-system/sw/bin/sddm"; in the sddm example.

quasselcore also works as a service with this preFixup in pkgs/applications/networking/irc/quassel/default.nix:

preFixup = lib.optionalString buildCore ''
  wrapProgram "$out/bin/quasselcore" --suffix PATH : "${qtbase.bin}/bin"
''