> On 15 Mar 2019, at 21:47, Simon Ruggier <simo...@gmail.com> wrote: > > The packages have to be available online for dependency links to work, yes, > but they're not public: one needs to authenticate with an SSH key to clone > each repository.
Both --find-links and --index-url (or --extra-index-url) provide the possibility to secure the download with authentication (HTTP Basic Auth). > >> On March 13, 2019 2:09:03 PM UTC, Tzu-ping Chung <uranu...@gmail.com> wrote: >> >>> 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/
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