2023-12-06 Conda Community Meeting

Zoom link · What time is the meeting in my time zone

Various parts of the conda community gather on a regular basis. This meeting brings together all of these sub-communities for a community wide call.

Attendees

Name	Initials	Affiliation	GH Username
Dave Clements	DPC	Anaconda	tnabtaf
Marcel Bargull	MB	Bioconda/cf	mbargull
Marius van Niekerk	MvN	Voltron Data/cf	mariusvniekerk
Katherine Kinnaman	KK	Anaconda	kathatherine
Marcelo Trevisani	MDT	conda-forge	marcelotrevisani
Daniel Holth	DH	Anaconda	dholth
Jannis Leidel	JL	Anaconda/cf	jezdez
Sebastien Awwad	SA		awwad
Travis Hathaway	TH	Anaconda	travishathaway
Isuru Fernando	IF	Quansight/cf	isuruf

12 people in total

Announcements

• November conda, conda-build releases including conda-build patch release to address versions in multi-output packages, pypi dependency information.
• Mamba 1.5.4 patch release needed to accommodate refactor in conda CLI parsing in 23.11.x: https://github.com/mamba-org/mamba/issues/3033

New Agenda Items

• (DH) Improved JLAP (incremental repodata updates) implementation
  • First we collected patches in a separate file. Later we thought it would be clever to re-serialize a fully-updated repodata.json to disk each update. Unfortunately, it takes ~2.2s to serialize conda-forge/linux-64/repodata.json, longer than the time to decompress repodata.json.zst to disk.
  • Conda's current JLAP implementation uses much less bandwidth but is only faster than downloading a fresh repodata.json.zst if your bandwidth is < ~110Mbps.
  • Instead, we can collect relevant patches into a trivial overlay file described here. We write a few megabytes instead of 200+ MB. The cached repodata.json is not rewritten. A small patch to libmamba reads the format. Mamba feedstock against local checkout Draft conda PR
• (WV) Calling for a vote on the new recipe format Part II. Remaining discussion points:
  • shared_libraries (is there a word that also includes "shared binaries")? -> dynamic_linking
  • constrains vs constraints vs constrained
  • no_hoist - want to postpone this. It's darn cryptic. Punt on this for now.
  • recipe vs package vs output
  • WV will update CEP. Then call vote, hopefully this week.
• (DH) The simple base_url CEP may have a vote.
  • Will bundle with build recipe CEP vote.
  • Should the JLAP CEP vote be heaped in too?
    • DH: Don't bundle JLAP CEP in vote.
• (DPC) Next two calls are Dec 20th and Jan 3rd.
  • Should we meet or cancel those two?
  • YES we should meet!
• (DPC) Social media
  • Conda twitter will be closed by end of year.
    • Will coordinate with conda-forge (Fillipe)
    • JL: Clarification about "closed"?
      • DPC: Proposal: Account will still be there, but it won't be active. Will point to Mastodon.
        • JL: 100%.
  • I want to up our presence on LinkedIn.
    • Any objection to establishing a conda org on LinkedIn?
    • JL: Our audience is on LI these days.
    • YES!
  • Will setup a Buffer account (owned by condamanager@gmail.com) for simultaneously posting to Mastodon and LinkedIn.
    • JL: Free plan only?
      • DPC: Yes. We get up to 3 channels. Propose setting up for Mastodon and LinkedIn.
        • Bluesky, Matrix, and Discourse are not currently supported. Bluesky is second most requested new channel.
    • JL: Please coordinate this via the communications team to spread knowledge (volunteers welcome!)
      • DPC: 💪 👍
• ()

recipe:
    name: bla
    version: "1.2.3"

outputs:
    - package:
        name: "libbla"
      build: ...
    - package:
        name: "bla"

package:
    name: bla
    version: "1.2.3"

outputs:
    - output:
        name: "libbla"
      build: ...
    - output:
        name: "bla"