John Hawthorn Nov 11, 2022
Wow! Bundler just merged a PR switching it's version resolution algorithm to PubGrub, which should make "bundle update" faster and have better error messages https://github.com/rubygems/rubygems/pull/5960 🧵
Migrate our resolver engine to PubGrub by deivid-rodriguez · Pull Request #5960 · rubygems/rubygems

What was the end-user or developer problem that led to this PR? Our current resolve engine has performance issues where sometimes it will hang during resolution due to an excessive number of resolu...

GitHub
Show threadJohn Hawthorn 
PubGrub is a version solving algorithm written by @nex3 based on conflict-driven clause learning for the dart package manager. It's super cool. She has an excellent write up about it at https://nex3.medium.com/pubgrub-2fb6470504f . A few years ago I wrote the Ruby port, which it's amazing to now see used by bundler
PubGrub: Next-Generation Version Solving - Natalie Weizenbaum - Medium

PubGrub is a brand new package management algorithm for selecting packages more quickly and explaining failures more clearly than ever before.

Medium
Nov 11, 2022 at 11:46pmWeb
Show threadJohn Hawthorn Nov 11, 2022
I can't wait to get these error messages from bundler in my terminal. How PubGrub works is generate a logical proof for version solving. So you get a complete explanation of why your Gemfile failed. David did a great job adjusting the language to be more bundler-applicable too.
Show threadThomas CannonNov 12, 2022
@jhawthorn ooo this is exciting
Show threadNicolas BuduroiNov 12, 2022
@jhawthorn this would be awesome! Just upgraded a large Rails application with almost 400 dependencies and this is sorely needed.