Ruby 3.1 release documentation
1. Upgrade rbenv
To include Ruby 3.1 as one of the available install options, first upgrade ruby-build:
brew update && brew upgrade ruby-build
See all available versions with rbenv install --list.
Ruby 3.1.0 should return in the result.
2. Install Ruby 3.1.0
rbenv install 3.1.0
3. Set local Ruby version
rbenv local 3.1.0
You can verify that the .ruby-version file in the root of your folder now lists version 3.1.0.
4. Update Gemfile
# old
ruby "3.0.3"
# new
ruby "3.1.0"
Tip: You can link to the ruby .ruby_version file instead to read the ruby version. A single source defines the ruby version and you avoid a discrepancy between the gemfile and .ruby_version file to occur.
ruby File.read('.ruby-version').strip
bundle install
You might run into the error cannot load such file -- net/smtp (LoadError). net-smtp has been removed from the default gems in ruby 3.1. As Action Mailbox depends on net/smtp temporarily add to your gemfile until the mail gem includes it as a dependancy.
gem "net-smtp", require: false
5. Debug gem
The debug gem is the new preferred debugger. Alternative gems like pry are no longer necessary. Rails 7 includes the debug gem by default.
Gemfile:
group :development, :test do
# old
gem 'pry'
# new
gem "debug", ">= 1.0.0"
end
Learn more in this video
6. New Features
- Error highlighting examples
- IRB auto-completion
- Typeprof examples / vs code extension / video
- Short Syntax Hash Values examples
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