On Oct 26, 2013, at 10:14 PM, Donald Stufft <don...@stufft.io> wrote:
> I would like to remove dependency_links from pip, and ideally > also setuptools. > > In implementing the ensurepip module from PEP453 I realized that > even with the ``--no-index`` flag pip was still attempting to > reach the internet. After a little bit of investigation I realized > that the reason for this was setuptools use of dependency links. > From my investigation it appears that setuptools uses these in order > to enable secure automatic installation of the ssl dependencies on > Python < 2.6. > > Overall this feature is a security concern, a malicous package could > "pin" any package they want by depending on it and adding a dependency > link a version 100000. This would be more or less transparent to > the end user. > > I was looking to see what sort of impact this would have. There are > currently 167,796 source files hosted on PyPI and of those files > 4,005 of them have any dependency links at all. Looking at it a > different way, there are 36,070 total projects on PyPI and 411 of them > use this feature. So this is ~2% of the files or ~1% of the projects. > > So it appears that this isn't a particularly popular feature, I believe > that it is a *bad* idea that inverts the expected control and should > be removed from both pip and setuptools. In setuptools case it does use > it in the only reasonable way I can imagine, however I think setuptools > should just stop trying to automatically install those dependencies > for Pythons < 2.6 and similarly to pip just print an error and expect users > to get and install them on their own. As a reminder there are very > few downloads from PyPI that are from Pythons < 2.6 [1] > > [1] https://caremad.io/blog/a-look-at-pypi-downloads/ > [2] https://gist.github.com/dstufft/7173539 > > ----------------- > Donald Stufft > PGP: 0x6E3CBCE93372DCFA // 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA > > _______________________________________________ > Distutils-SIG maillist - Distutils-SIG@python.org > https://mail.python.org/mailman/listinfo/distutils-sig A list of projects that use dependency links: https://gist.github.com/dstufft/7177500 ----------------- Donald Stufft PGP: 0x6E3CBCE93372DCFA // 7C6B 7C5D 5E2B 6356 A926 F04F 6E3C BCE9 3372 DCFA
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