Versioning issues about py-amqp

[ask]

The version in amqp/__init__.py from

https://pypi.python.org/packages/source/a/amqp/amqp-1.0.13.tar.gz#md5=33e9e59f71a396f9cdd5d5d6a3d2e5d5

is most certainly 3.0.13

Probably you have installed the development previously, and pip will not downgrade until you have uninstalled it!

[saschpe]

Whatever "3.0.13" means... It is also not important which version the current tarball contains. What matters is that there has been a release in the past with a version number higher than the current one.

Let me explain a bit more what issue we have. openSUSE is a distribution that provides stable releases. These include Python modules packaged as RPMs. One of the most important commitments Linux distributions offer their users is upgradability. So let's say a user of openSUSE-12.3 (the current release) has python-amqp-1.2.0.rpm (slightly simplified) installed. If we would release python-amp-1.0.13, his package manager wouldn't care since the version is inferior. Of course we do have solutions for this, we can either fake a different version (sometimes done in the Debian / Ubuntu world) like 1.2.0+really1.0.13 or use an RPM epoch (check the interwebs). Both are rather ugly. BTW. here's a summary of how both DEB and RPM compare versions: https://twiki.cern.ch/twiki/bin/view/Main/RPMAndDebVersioning

Therefore, we (and all the other major distros) simply don't allow version downgrades. So this is an issue outside of virtualenvs or local pip caches. py-amqp seems to losely follow semantic versioning. Even in this scheme, a version downgrade is a no-go. Unfortunately, it's a bit challenging to dig out py-amqp's past releases since they are hidden from PyPI (which is the default setting). So in the past, 1.2.0 was out there and unfortunately we packaged it at this moment.

Long story short, I don't think the issue is solved already and I would love to see a proper resolution. Even if you wouldn't want to bump to 1.2.1 to provide a proper upgrade path, it would at least help if we could be sure that this won't happen again.