It is assumed that asdf has already been installed.
shell
asdf plugin-add ruby https://github.com/asdf-vm/asdf-ruby.git
Even if I try to execute the asdf list-all ruby command
It seems that only 3.0.0-rc1 is listed yet.
(As of December 26, 2020)
shell
..
2.7.2
3.0.0-dev
3.0.0-preview1
3.0.0-preview2
3.0.0-rc1
artichoke-dev
jruby-1.5.6
jruby-1.6.3
..
Specify the build version with the following command and install.
shell
ASDF_RUBY_BUILD_VERSION=v20201225 asdf install ruby 3.0.0
shell
#Confirm installation
asdf list ruby
3.0.0
#Globally designated&shim regeneration
asdf global ruby 3.0.0
asdf reshim ruby
#Shell restart or reload
#Version confirmation
ruby -v
ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin20]
#Confirmation of substance
where ruby
/Users/username/.asdf/shims/ruby
asdf which ruby
/Users/username/.asdf/installs/ruby/3.0.0/bin/ruby
Successfully installed: cat2:
Source: https://github.com/asdf-vm/asdf-ruby https://github.com/asdf-vm/asdf-ruby/pull/192 https://asdf-vm.com/#/core-commands
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