On Mon, Oct 15, 2012 at 2:41 PM, Vinay Sajip <vinay_sa...@yahoo.co.uk> wrote: > Daniel Holth <dholth <at> gmail.com> writes: > >> When you are using setuptools, setup.py can be used to generate >> declarative metadata with the command "python setup.py egg_info". You >> can add --egg-base <dir> to put the static metadata in a different >> directory. Setuptools even makes it easy to add new metadata files to >> the .egg-info folder by using a plugin to write each file. The >> majority of the sdists on pypi contain pre-built versions of this >> static metadata in .egg-info folders. > > Can it be correctly said that all of the metadata passed to setup() is in > .egg-info? How far can we rely on the accuracy of the content of .egg-info > dirs in sdists on PyPI? I have found hundreds of projects where even basic > metadata is missing or incorrect - for example, the version.
You can't trust the bundled .egg-info folder, that is why pip rebuilds it during dependency resolution. You can trust the fresh one that you've just built. The .egg-info contains the three things you need during install: Name, Version, requirements. It's always been a mystery to me that we don't just edit PKG-INFO directly. >> Unfortunately setup.py is used to build not one, but many different >> dists (the most common difference of course being different >> requirements) depending on any number of factors, so pip rebuilds the >> static metadata before using it. Metadata 1.2+ of course allow us to >> put the most common "reasons for different dependencies" conditions in >> the static metadata itself. > > Unfortunately, that doesn't help with nearly all the stuff currently on PyPI. Nope, it's a ~25k-package hard problem. Or ~1.5k if you discard the simple ones. _______________________________________________ Distutils-SIG maillist - Distutils-SIG@python.org http://mail.python.org/mailman/listinfo/distutils-sig