> On 6 Mar 2019, at 03:53, Simon <simo...@gmail.com> wrote: > > I hope it's not an issue that I'm replying to a month-old thread. I reviewed > the previous discussion to try to avoid duplicating any of it. > > When using pip with PyPI, calling pip a second time is much quicker than the > first time, because it verifies that the requirements, including version > constraints, are satisfied in the target environment and doesn't needlessly > reinstall stuff. > > Dependency links allowed the same behaviour to be implemented for private > packages with dependencies on other private repositories: given a requirement > B >= 3 and a dependency link that B was available from, pip could check if > the environment already includes a package B with a new enough version, and > only use the dependency link as a fallback if the requirement isn't already > satisfied. > > URL specifiers aren't useful for providing a fallback location to get a > package from, because using one prevents the package from specifying a > version constraint in the same way that was possible with dependency links, > or with normal requirements available from PyPI. Curiously, discussion of > version constraints in this thread has focused on how nonsensical it would be > to compare them to the specifying URL, ignoring the possibility of comparing > the constraint with the target environment. > > The loss of this functionality means that anyone who was previously using pip > to automatically install private packages with private dependencies now has > to either forgo automatic dependency management (a large part of why one > would use a package manager to begin with) in favour of recursively specified > requirements files, publish their private packages somewhere so that pip can > find them, or stick with pip 18.1 for now.
Wouldn’t you still need to “publish the private packages somewhere” for dependency links to work? `setup.py sdist` with `pip --find-links` can get you very far; the only differences IMO is you have to provide a proper package, and write a simple HTML file to point to it. > -- > Distutils-SIG mailing list -- distutils-sig@python.org > To unsubscribe send an email to distutils-sig-le...@python.org > https://mail.python.org/mailman3/lists/distutils-sig.python.org/ > Message archived at > https://mail.python.org/archives/list/distutils-sig@python.org/message/BALD2PVKGHBBWIKNYTZGGF6LHEXI7O26/ -- Distutils-SIG mailing list -- distutils-sig@python.org To unsubscribe send an email to distutils-sig-le...@python.org https://mail.python.org/mailman3/lists/distutils-sig.python.org/ Message archived at https://mail.python.org/archives/list/distutils-sig@python.org/message/K3NCORKUWGPCPFXGTZGXUFWHVGODL6FC/
