til/ruby/install-latest-version-of-ruby-with-asdf.md

Install Latest Version Of Ruby With asdf

When I check the asdf Ruby plugin for known versions of Ruby:

$ asdf list-all ruby | fzf

I don't find the latest (3.4).

I need to update the plugin. A newer version of the plugin will know about newer Ruby versions.

$ asdf plugin-update ruby

Now, if I run the list-all command again, I'll find the version I'm looking for — 3.4.1.

Now that asdf and I both know about the version to be installed, I can tell asdf to install it:

$ asdf install ruby 3.4.1

Now, if I check the current Ruby version, I'll see that it is still set to some other version.

$ ruby --version
ruby 3.2.2 (2023-03-30 revision e51014f9c0) [x86_64-darwin22]

I need to tell asdf to start using this newly installed version instead, either globally or locally.

$ # globally
$ asdf global ruby 3.4.1
$ # or locally
$ asdf local ruby 3.4.1

And now I'm all set:

$ asdf current ruby
ruby            3.4.1           /Users/jbranchaud/.tool-versions

$ ruby --version
ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [x86_64-darwin22]