Snap can't handle applications which are using libappindicator, and ends up with error

Question

I was snapping my application which is written in qt5 and uses libappindicator to provide system tray icon with some functionalities.

After Creating snap and running my app, it ends up with the following error message in terminal window :

 libappindicator-WARNING **: Unable to connect to the Notification     
 Watcher: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: An 
 AppArmor policy prevents this sender from sending this message to  
 this recipient; type="method_call", sender=":1.153" (uid=1000 
 pid=19705 comm="deskie-snap ") 
 interface="org.kde.StatusNotifierWatcher" 
 member="RegisterStatusNotifierItem" error name="(unset)" 
 requested_reply="0" destination=":1.53" (uid=1000 pid=3134 
 comm="/usr/lib/x86_64-linux-gnu/indicator-application/in")

I also used unity7 interface which is think handle the connectivity of libappindicator to system's Bus.

My snapcraft.yaml file look like this:

Pastebin Link

Help please.

Answer 1

Please, check this mailing list post.

You need snapd that includes this commit that is included in snapd 2.18, if you're still in snapd 2.17 or lower, you can workaround it with:

wget -qO- https://github.com/jdstrand/snapd/commit/95768199111.patch | \
  sudo patch \
 /var/lib/snapd/apparmor/profiles/snap.<your-snap>.<your-command>

sudo apparmor_parser -r \
 /var/lib/snapd/apparmor/profiles/snap.<your-snap>.<your-command>

You also might need to include indicator-gtk2 (or 3) remote part to take care of the $SNAP prefix, but this might be optional if you build things with snap ind mind.