Fwd: [pypa/pip] New Resolver: Rollout, Feedback Loops and Development Flow (#6536)

[Neal Gompa]

---------- Forwarded message ---------
From: Sumana Harihareswara 
Date: Thu, Jul 30, 2020 at 11:36 AM
Subject: Re: [pypa/pip] New Resolver: Rollout, Feedback Loops and
Development Flow (#6536)
To: pypa/pip 
Cc: Neal Gompa (ニール・ゴンパ) , Comment <
[e-mail]>

Per #8511 https://github.com/pypa/pip/issues/8511 we have now released *pip
20.2*. This release includes the *beta of the next-generation dependency
resolver*. It is significantly stricter and more consistent when it
receives incompatible instructions, and reduces support for certain kinds
of constraints files, so some workarounds and workflows may break. *Please
test it* with the --use-feature=2020-resolver flag. Please see our guide on
how to test and migrate, and how to report issues
https://pip.pypa.io/en/latest/user_guide/#changes-to-the-pip-dependency-resolver-in-20-2-2020.
The new dependency resolver is *off by default* because it is *not yet
ready for everyday use*.

We plan to make pip's next quarterly release, 20.3, in October 2020. *We
are preparing to change the default dependency resolution behavior and make
the new resolver the default in pip 20.3.*

Please *spread the word* by pointing to this blog post
https://blog.python.org/2020/07/upgrade-pip-20-2-changes-20-3.html --
spread the word on Hacker News, Reddit, Twitter, Facebook, Dev.to,
Telegram, relevant Stack Overflow answers, and your favorite Slacks and
Discords. Most of the people this will affect do not keep up with
Python-specific developer news. Help them get the heads-up before October,
and help us get their bug reports.

(Copying my note from #988 https://github.com/pypa/pip/issues/988.)

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