Uranium (and therefore cura) is broken with Python 3.12

[oldlaptop]

Is this a new report?

Yes

System Info

Void 6.5.7_1 x86_64-musl AuthenticAMD notuptodate rrFFFFFF

Package(s) Affected

Uranium-4.13.1_3 cura-4.13.1_3

Does a report exist for this bug with the project's home (upstream) and/or another distro?

No response

Expected behaviour

cura should (presumably) launch.

Actual behaviour

cura fails to launch with the following traceback:

$ cura
Traceback (most recent call last):
  File "/usr/bin/cura", line 27, in <module>
    from cura.CrashHandler import CrashHandler
  File "/usr/lib/python3.12/site-packages/cura/CrashHandler.py", line 29, in <module>
    from UM.Application import Application
  File "/usr/lib/python3.12/site-packages/UM/Application.py", line 9, in <module>
    from UM.Controller import Controller
  File "/usr/lib/python3.12/site-packages/UM/Controller.py", line 4, in <module>https://github.com/Ultimaker/Uranium/issues/765
    from UM.Scene.Scene import Scene
  File "/usr/lib/python3.12/site-packages/UM/Scene/Scene.py", line 13, in <module>
    from UM.Mesh.ReadMeshJob import ReadMeshJob  # To reload a mesh when its file was changed.
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/site-packages/UM/Mesh/ReadMeshJob.py", line 8, in <module>
    from UM.FileHandler.ReadFileJob import ReadFileJob
  File "/usr/lib/python3.12/site-packages/UM/FileHandler/ReadFileJob.py", line 5, in <module>
    from UM.FileHandler.FileHandler import FileHandler
  File "/usr/lib/python3.12/site-packages/UM/FileHandler/FileHandler.py", line 12, in <module>
    from UM.PluginRegistry import PluginRegistry
  File "/usr/lib/python3.12/site-packages/UM/PluginRegistry.py", line 4, in <module>
    import imp
ModuleNotFoundError: No module named 'imp'

The imp module was removed in Python 3.12. It doesn't appear upstream has fixed this yet.

Steps to reproduce

Install cura and attempt to launch it.

[destructatron]

Adding to the list of broken packages here, the Orca screen reader is also affected by this.

[oldlaptop]

See also PR 915 upstream.

[Vinfall]

I attempted to update Uranium to 5.5.0 ,added PR patch and removed the old patch (due to build error), but it failed to build somehow:

./xbps-src pkg Uranium
=> xbps-src: updating repositories for host (x86_64-musl)...
[*] Updating repository `https://repo-default.voidlinux.org/current/musl/bootstrap/x86_64-musl-repodata' ...
[*] Updating repository `https://repo-default.voidlinux.org/current/musl/x86_64-musl-repodata' ...
[*] Updating repository `https://repo-default.voidlinux.org/current/musl/nonfree/x86_64-musl-repodata' ...
[*] Updating repository `https://repo-default.voidlinux.org/current/musl/debug/x86_64-musl-repodata' ...
=> xbps-src: updating software in / masterdir...
=> xbps-src: cleaning up / masterdir...
=> Uranium-5.5.0_1: removing autodeps, please wait...
=> Uranium-5.5.0_1: building with [cmake] for x86_64-musl...
   [host] python3-3.12.0_1: found (https://repo-default.voidlinux.org/current/musl)
   [host] gettext-0.21_4: found (https://repo-default.voidlinux.org/current/musl)
   [host] cmake-bootstrap-3.27.6_1: found (https://repo-default.voidlinux.org/current/musl/bootstrap)
   [host] ninja-1.11.1_4: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] libArcus-python3-4.13.1_7: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-PyQt5-opengl-5.15.9_2: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-PyQt5-quick-5.15.9_2: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-PyQt5-svg-5.15.9_2: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-numpy-stl-2.17.1_3: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-scipy-1.11.3_1: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] qt5-quickcontrols-5.15.7+20221119_7: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] qt5-quickcontrols2-5.15.7+20221119_7: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-shapely-2.0.1_2: found (https://repo-default.voidlinux.org/current/musl)
   [runtime] python3-cryptography-41.0.5_1: found (https://repo-default.voidlinux.org/current/musl)
=> Uranium-5.5.0_1: installing host dependencies: python3-3.12.0_1 gettext-0.21_4 cmake-bootstrap-3.27.6_1 ninja-1.11.1_4 ...
=> Uranium-5.5.0_1: running do-patch hook: 00-patches ...
=> Uranium-5.5.0_1: patching: deprecated-imp-module.patch.
=> Uranium-5.5.0_1: running pre-configure hook: 00-gnu-configure-asneeded ...
=> Uranium-5.5.0_1: running pre-configure hook: 01-override-config ...
=> Uranium-5.5.0_1: running pre-configure hook: 02-script-wrapper ...
=> Uranium-5.5.0_1: running do_configure ...
CMake Warning (dev) at CMakeLists.txt:6 (project):
  cmake_minimum_required() should be called prior to this top-level project()
  call.  Please see the cmake-commands(7) manual for usage documentation of
  both commands.
This warning is for project developers.  Use -Wno-dev to suppress it.

CMake Error at CMakeLists.txt:14 (include):
  include could not find requested file:

    UraniumTranslationTools

CMake Error at CMakeLists.txt:20 (CREATE_TRANSLATION_TARGETS):
  Unknown CMake command "CREATE_TRANSLATION_TARGETS".

-- Configuring incomplete, errors occurred!
=> ERROR: Uranium-5.5.0_1: do_configure: 'CFLAGS="-DNDEBUG ${CFLAGS/ -pipe / }" CXXFLAGS="-DNDEBUG ${CXXFLAGS/ -pipe / }" cmake ${cmake_args} ${configure_args} ${LIBS:+-DCMAKE_C_STANDARD_LIBRARIES="$LIBS"} ${LIBS:+-DCMAKE_CXX_STANDARD_LIBRARIES="$LIBS"} ${wrksrc}/${build_wrksrc}' exited with 1
=> ERROR:   in do_configure() at common/build-style/cmake.sh:76

[zlice]

I attempted to update Uranium to 5.5.0

https://github.com/Ultimaker/Uranium/issues/880

https://github.com/Ultimaker/conan-ultimaker-index/blob/main/recipes/translationextractor/conanfile.py

Looks like 5.0+ ditched cmake but kept cmake files?

[zlice]

started stealing from alpine's 5.2.2 build (which is cmake btw), but protobuf needs bumped to 25 and it touches a couple dozen packages...

ya not protobuf, just a bunch of mixed version and packages that need to build together

[haunma]

Just a note that this problem is still present for me with the latest cura in the repos (still at 4.13, a lot older than the latest 5.7). I am having to use the AppImage instead, unfortunately. Is the packaged version of cura abandoned?

[zlice]

Since 5.0 they started using conan, which is a python type environment https://github.com/Ultimaker/Cura/wiki/Running-Cura-from-Source#system-requirements

@karl-nilsson are you still maintaining this or using void?

[karl-nilsson]

@zlice awhile back, I attempted to update the cura package to accommodate their new build flow. I haven't had the time or motivation since then, so I'm happy to hand of maintainership if someone else is interested.

[classabbyamp]

doesn't seem too bad? https://git.alpinelinux.org/aports/tree/testing/cura/APKBUILD + 4 patches