Dev mini syncup

14 April 2020

Participants: Paul, Pradyun, Tzu-Ping

- pip 20.1 + https://hackmd.io/nSueIf7PQViDeaEPQIuprQ

• - What is still missing in the resolver (vs old resolver)
  • TP: If the test suite covers everything, then we're missing

    • user installs (may be solved by https://github.com/pypa/pip/pull/7997)

    • upgrade strategy (need to emit a warning/error for this)
    • constraints (has error message)
    • wheel cache
    • error messages (see below)
    • circular dependency (has error message)
  • Also some things that are failing but I can’t figure out why
    • Pradyun: there's a lot of stuff that the resolver doesn't actually test.

    • [discussed REQUESTED implementation https://github.com/pypa/pip/pull/8026/]

  - What has been implemented
  • nothing specific to be mentioned in the release notes
  • “If something works, yay, tell us so that we can party, otherwise still tell us so we can fix it”
  - What to merge

  • https://github.com/pypa/pip/pull/8014

  • https://github.com/pypa/pip/pull/8033

  • https://github.com/pypa/pip/labels/C%3A%20new%20resolver -- there's a new label!

  - Where do users report issues https://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html

  • zazo? rename & repurpose

  • move issues -- TP pointed out that we can only use this within the same namespace / org / user repos.
  • Pradyun: don't want a temporary repo on the PyPA org.
  • [TODO 1]
  - Release notes + documentation?
  • - [TODO 2]

- optimising network requests

• Resolvelib will take an iterator in "highest priority first" order
• Transition plan, take a list for now with a deprecation warning (and reverse?)

• TP will look at the code and decide what's best

- error messages https://github.com/pypa/pip/pull/8033

• Pradyun: seems like only 1 failure https://travis-ci.org/github/pypa/pip/jobs/674789470#L403

• Paul: will look at that after call.

Pradyun: normalization. * will have to deal w/ in revendoring

https://docs.python.org/3/library/exceptions.html#PermissionError

• [TODO 1]: Remind Sumana to get us an email address for resolver-related reports as we promised in the PSF blog
• [TODO 2]: Discuss w/ Sumana about communication around pip 20.1 + where does she think the notes from Paul should go

Check the above two TODO points with Sumana. Maybe syncup tomorrow (Wed) if there’s update on those. Or... Zulip! :P