SUMMARY Latest Krita 4.3.0 and 4.2.9 (Appimage) python (3.8) version has issues with loading c libraries. In old Krita 4.1.5 python versions (3.5) ctypes worked just fine. STEPS TO REPRODUCE # tools -> scripts -> scripter -> import ctypes OBSERVED RESULT ********************** ModuleNotFoundError: No module named '_ctypes' In file: /tmp/.mount_ (rnd_id) /usr/lib/python3.8/ctypes/__init__.py In function: <module> at line: 7. Line with error: from _ctypes import Union, Structure, Array ********************** EXPECTED RESULT None (success) SOFTWARE / OS VERSIONS Linux: Ubuntu 18.04.4 LTS PYQT_VERSION_STR = 5.13.1 QT_VERSION_STR = 5.12.7
I can confirm the issue. Thanks for making the report!
Hi - this ctypes issue seems to be coming from the python build shipped in the https://binary-factory.kde.org/job/Krita_Nightly_Appimage_Dependency_Build/lastSuccessfulBuild/artifact/krita-appimage-deps.tar package. Could someone fix that python build so we can get fully working appimages? Cheers!
It's highly probable that the build issue is caused by a missing libffi-dev package in the dev environment.
To confirm the above - I managed to make an 4.4.1 Appimage with a python with ctypes fixed by using the docker build method (https://invent.kde.org/dkazakov/krita-docker-env). I used the pre-packaged dependencies except for python-3.8.1 which I simply built again and installed to the deps folder. Only thing I needed to do to fix the ctypes import issue was to install libffi-dev in that docker build container before building. So based on that I'm pretty sure that this same fix could be applied to the docker that is used for the automated dependency builds (https://binary-factory.kde.org/job/Krita_Nightly_Appimage_Dependency_Build/).
I've made a sysadmin task asking for libffi-dev to be added to the appimage build image.
Git commit 7201943484fa3167070c64c334b6e21bfa9e4aaa by Ben Cooksley. Committed on 14/01/2021 at 16:47. Pushed by bcooksley into branch 'master'. Ensure libffi-dev is included within our image. Ref T14046 M +2 -0 system-images/appimage-1604/Dockerfile https://invent.kde.org/sysadmin/ci-tooling/commit/7201943484fa3167070c64c334b6e21bfa9e4aaa
Tganks!
Thanks Halla & Ben!
How about also executing that "Krita_Nightly_Appimage_Dependency_Build" (which appears to be more like a monthly build - I guess it's run on demand or atleast the change made didn't trigger a build) so that the actual Krita nightly builds can pick up this change? Cheers!
Argh, yes, I need to kick that off manually...
And I cannot do that today, because download.qt.io is down...
Okay, download.qt.io is up again, so I've kicked off an appimage deps build: https://binary-factory.kde.org/job/Krita_Nightly_Appimage_Dependency_Build/
Thanks Halla - seems like it finished succesfully and based on the log the python ctypes was built ok. Fingers crossed for the next Krita nightly build ;)
We can now confirm that importing ctypes works now in the latest Krita appimages. Cheers! Happy this got resolved.