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André Arko / 8 May 2026 / RubyCon IT
a ruby manager for the future
rv
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André Arko / 8 May 2026 / RubyCon IT
a ruby manager for the future
rv
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André Arko
@indirect
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André Arko
@indirect
bundler.io
rubygems.org
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André Arko
@indirect
rv.dev
gem.coop
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a ten-year dream of rubies
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that came true… in python
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uv is revolutionary
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uvx github-backup
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now to business
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No content
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dream into goal
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rust? really?
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rust? really.
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No content
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building rubies
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more like ohnopenSSL
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the static tradeo
f
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portable-ruby
(thank you Homebrew)
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relocatable as well, phew
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minimum viable rv
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minimum viable rv
macOS ARM + Linux x86
.ruby-version
`rv shell zsh`
`rv ruby install`
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`rv ruby install 3.4.5`
[ ... 1 second ... ]
`ruby -v`
rv 0.1
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bre
w
install rv
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rv 0.2
`rv shell [bash|
fi
sh|nu]`
`rv ruby install [3.3|3.4]`
macOS x86 + Linux ARM
YJIT for all versions
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`rv ruby install [0.49|3.2|4.0]`
.tool-versions
rv 0.3
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interlude
how to progress
incrementally
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interlude
rebuilding a bundler,
one feature at a time
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interlude
`bundle install --frozen`
`gem install rails`
`bundle install`
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`rv clean-install`
(like bundle install --frozen)
`rv ci && bin/rails test`
rv 0.4
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Windows + Alpine Linux
`rv run [ruby|irb|bash]`
`rv tool install gist && gist`
`rvx rails new`
rv 0.5
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Windows + Alpine Linux
`rv run [ruby|irb|bash]`
`rv tool install gist && gist`
`rvx rails new`
rv 0.5
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`rv ruby install dev`
daily builds of ruby-dev…
in one second
rv 0.6 (soon!)
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`rv sync`
like `bundle install` but
so fast it runs every command
rv 0.7 (next)
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project setup → `rv init`
tasks → `rv run TASK`
scripts → `rv run SCRIPT.RB`
gems → `rv gem NAME`
the future
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cool ideas but
what can you do with it now?
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$ bre
w
install rv
$ rvx rails ne
w m
yapp
[installs ruby in 1s]
[installs rails in 8s]
[generates
m
yapp]
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# share scripts using
m
any
# rubies, all auto-installed
$ rv run --ruby 3.3 bench.rb
$ rv run --ruby 3.4 bench.rb
$ rv run --ruby 4.0 bench.rb
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# CLIs outside Ruby versions
$ rv tool install gist
$ cd ruby-4-app
$ gist
$ cd ../ruby-2-app
$ gist
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rv.dev
a fast ruby language manager
for the future