rv, a Ruby version & package CLI written in Rust

Why is rv written in Rust, even though it's a tool for managing Ruby interpreters and packages? Why does rv exist in the first place? What's it like to write a tool in Ruby and then a similar tool in Rust? What are the interesting and good parts about writing a developer tool CLI in Rust?

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1. rv a Ruby version & package CLI written in Rust André Arko / SF Rust Meetup / 19 August 2026 spinel.coop / rv.dev
2. rv a Ruby version & package CLI written in Rust André Arko / SF Rust Meetup / 19 August 2026 spinel.coop / rv.dev
3. André Arko @indirect
4. André Arko @indirect bundler.io rubygems.org
5. André Arko @indirect
6. André Arko @indirect rv.dev gem.coop
7. why is rv?
8. fi Bundler created app lock les in 2009
9. after that, other languages added good and new ideas
10. for ten years, I hoped
11. my dream came true...
12. my dream came true... for python 🥲
13. uv is really good
14. uvx github-backup
15. fi inspired by uv, I nally decided to do it myself
16. rv.dev Ruby version and package manager.
17. rv.dev Ruby version and package manager. spinel.coop Delightful tools and more productive developers.
18. why use Rust?
19. why use Rust? 1. I wanted it to be very fast
20. why use Rust? 1. I wanted it to be very fast 2. Good experience in 2018
21. h
22. why use Rust? 1. I wanted it to be very fast 2. Good experience in 2018 3. Existing tools uv, cargo, etc
23. why use Rust? 1. I wanted it to be very fast 2. Good experience in 2018 3. Existing Rust tools uv, cargo 4. Bundler in Ruby was... bad
24. why use Rust? 1. I wanted it to be very fast 2. Good experience in 2018 3. Existing Rust tools uv, cargo 4. Bundler in Ruby was... bad. Bad for maintainers, Bad for contributors.
25. fi Rust xes this!
26. contributing works both ways
27. interesting parts of using Rust
28. clap is so good
29. every kind of parallelization
30. fi xing your own tools feels really good
31. try rv brew install rv rvx rails help
32. tell us how to make it faster! repo at rv.dev
33. questions? rv.dev André Arko / SF Rust Meetup / 19 August 2026 spinel.coop / rv.dev