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Re:Orphaning bcachefs-tools in Debian by rcxdude on Sunday September 01, 2024 @05:50AM (#41415568)
No, in both cases the issue is the same: whether the actual interface of the library is staying the same or not, and over what time period. Python packages have plenty of the same kind of breakages. usually it's unintentional, a bug or similar, sometimes it's a deliberate breaking change in a point release. Either way the effect is the same. Version X works in project A but newer version Y doesn't, and the reverse can be true for project B. It's just that in python you're most likely to get the problem when you run the code, wheras compiled languages can also fail at the build step as well as at runtime.

It can be pretty bad with the bigger ML/scientific computing packages, hence all the version pinning that happens, though I will concur that generally speaking AI researchers don't understand package management in the slightest and you get all kinds of horrors as a result (e.g. mixing anaconda and pip in the same project, bonus points if it's blasted over the distro's python packaging for even more chaos. works on one very broken machine if you are lucky and don't touch anything).

Debian's approach is similarly frustrating: they will try to make your code work with an older version of a library than the one you developed with, which doesn't even work within semver (semver only defines backwards compatibility, not forwards). That's what caused the problem in this case: rolling forward dependencies was not recommended but didn't break anything, rolling a dependency backwards meant it stopped working, which is something absolutely no-one should be surprised or upset by (at least it meant the build broke as opposed to debian shipping a broken package like would have likely happened with python. It just meant that debian was shipping a version with bugs fixed in upstream). If you're going to do that you've got to be prepared to take responsibility for fixing the problem that you've introduced.

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