I’m trying to snap package Lutris: https://github.com/lutris/lutris/issues/736#issuecomment-447205522. My work is at https://github.com/lutris/lutris/issues/736#issuecomment-447205522 but it’s basically just a snapcraft.yaml file with a python3 part so far. When I run my built and installed snap, I get the error:
$ lutris
Traceback (most recent call last):
File “/snap/lutris/x1/bin/lutris”, line 33, in
from lutris.gui.application import Application
File “/snap/lutris/x1/lib/python3.6/site-packages/lutris/gui/application.py”, line 27, in
gi.require_version(‘Gdk’, ‘3.0’) # NOQA # isort:skip
File “/snap/lutris/x1/usr/lib/python3/dist-packages/gi/init.py”, line 130, in require_version
raise ValueError(‘Namespace %s not available’ % namespace)
ValueError: Namespace Gdk not available
I can resolve this error by removing “base: core18” and then adding desktop-launch from the launch command as in Exec: python: not found. I prefer to use core18 because I’m on Ubuntu 18.04. Building for 16.04 either requires snapcraft cleanbuild which is exceedingly slow or using Docker which is kind of inconvenient.
I saw that someone had a similar problem at Building on core18, failure on pulling core18 on build.snapcraft.io but I don’t get from that thread what the solution is. https://bugs.launchpad.net/snapcraft/+bug/1800057 says that desktop-launch comes from a remote part in “desktop-helper”. I tried adding all of the stage-packages from the parts in “desktop-helper” into my snapcraft.yaml but that did nothing. I tried adding all of the parts and source from desktop-helper into my project wholesale, but then it failed to build. I tried removing PyYAML, PyGObject, and evdev from install_requires in setup.py because they should be installed by the python-gi, python-yaml, and python-evdev package, but that didn’t do anything for me.
How do I resolve Python not seeing Gdk and Gtk?