pip 20.2 release (Q3 2020)

[pradyunsg]

Another quarter! Another release!

There has definitely been enough work done to justify a release (we have had funded developer time!).

[pradyunsg]

As always, we need a release manager for this release, from @pypa/pip-committers.

As has been the case for the past few releases (#7531 (comment)), I'd happy to be the release manager for this release as well. I'll be a bit more preemptive this time and self-assign myself as the RM for pip 20.2. Holler here if you're opposed to me being the RM. 😉

[pradyunsg]

Mapping the path from status quo, to where we want to be for the release:

• Update vendored packages for pip 20.2 release #8591 -- I need to update vendored packages
• Fail legacy install if .egg-info directory was not created #6998 -- a gone_in="20.2" deprecation that needs to be completed.
• Remove the pip search command #5216 (comment) -- no longer a blocker IMO.
• Fix the link on new-resolver dependency conflicts #8593 -- would be a good idea to not ship a broken link. :)

Other than that, looking at the new resolver work that's due for pip 20.2:

• Updating the message when the user hits a conflict w/ installed packages #8546 -- would be fixed by Improve install conflict warning #8594
• We still need a NEWS / Changelog entry for the new resolver presented behind --use-feature=2020-resolver.

(I think that's all?)

Right now, I think #6998 and the changelog entry are the only items that need to be done and haven't had someone take them up. @pypa/pip-team Any takers?

[sbidoul]

@pradyunsg we could add #8369 which is the easiest of the setup.py install deprecations. The others need more work.

[pradyunsg]

Sounds good to me!

[rouge8]

I'm hoping #8601 (or something similar) can be included to make it easier to use the new resolver 🤞

[pradyunsg]

Just did another pass with help from @brainwane. Looks like we should be on track for a release on Monday. :)

In terms of TODOs before the release, there's:

• finishing up Improve install conflict warning #8594 (which closes Updating the message when the user hits a conflict w/ installed packages #8546, wrapping up Implement step 1 in resolver rollout process #8513) -- that's a TODO for me.
• accepting/rejecting Support '--use-feature' in requirements files #8601 -- need @pypa/pip-committers' inputs/reviews on that. :)
• finishing up documentation/announcement prep for the new resolver.