Bug#1056531: cython 3.x (for Python 3.12)

[Matthias Klose]

On 11.12.23 19:55, Julian Gilbey wrote:
> On Mon, Dec 11, 2023 at 04:34:17PM +0100, Matthias Klose wrote:
>> On 11.12.23 16:19, Julian Gilbey wrote:
>>> On Mon, Dec 11, 2023 at 08:09:31AM +0100, Matthias Klose wrote:
>>>> [...]
>>>> You could package a non-conflicting cython-legacy, however that would
>>>> require more changes, also how to build it.
>>>
>>> Hi Matthias,
>>>
>>> Unfortunately, at least some of cython3-legacy doesn't currently work
>>> with Python 3.12, and is the primary cause of (at least) #1056531.
>>> cython3 provides the pyximport module, and that uses the imp module
>>> which has been removed from Python 3.12.
>>>
>>> Two possible ways forward on this particular bug:
>>>
>>> - Disable all of the cython tests for this package for the time being,
>>>     until cython 3.x migrates to testing - this is simple and effective.
>>>
>>> - Patch cython3-legacy to use importlib rather than imp.  This is
>>>     probably a good thing to do anyway.  (It may also be good to do this
>>>     with cython3 version 0.x currently in testing/unstable until cython
>>>     3.x is able to be uploaded to unstable.)  Then have my package's
>>>     autopkgtest depend on cython3-legacy (unless cython3 0.x is also
>>>     patched).
>>
>> I won't working on this. Have you tried to depend on the python3-zombie-imp
>> instead?
> 
> Excellent - I didn't know about that.  Are you OK for me to upload
> versions of cython and cython-legacy which depend on this to fix the
> Python 3.12 breakage?

not for cython, which won't need that soonish for 3.0.x.  and if you 
have to update the b-d to cython3-legacy, why not add the zombie-imp 
dependency as well manually for the few packages that need it?