Update: You can now just do gem update --system and be just fine, but the steps are still there for installing RVM.
Ruby 3.0 was released recently and seems to be fully backwards compatible with Ruby < 3.0 (2.7, etc).
I need a dual setup, as I use a linter and intellisense highlighter in VScode, and the Gem (rubocop and solargraph) won't pick up from WS2L (and I don't think it was designed to, either...).
You can get the installer for Windows here; Just follow the directions in the console and you're good to go. But how about on WSL2/Ubuntu?
(Also, the bundler/RubyGems steps below, and installing net-http-persistent apply to the Windows version of Ruby 3.0.0 as well!)
rvm.io Is the answer.
First, head to rvm.io
On Ubuntu, install gnupg2:
sudo apt install gnupg2
Then, as of this writing from rvm.io:
gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
To receive the keys needed.
Then:
\curl -sSL https://get.rvm.io | bash -s stable
To get the current stable version of RVM.
Once RVM is installed, don't forget to follow the source directions; it is something like:
* To start using RVM you need to run `source /home/aritywolf/.rvm/scripts/rvm`
in all your open shell windows, in rare cases you need to reopen all shell windows.
Now that we've got a stable version of RVM installed, it's time to install Ruby 3.0.0:
rvm install ruby-3.0.0
Now we have Ruby 3.0 installed with RVM managing the Ruby.
However, there is a slight problem; we receive a RubyGem related error:
Error running 'run_gem_wrappers regenerate',
please read /home/aritywolf/.rvm/log/1609499010_ruby-3.0.0/gemset.wrappers.default.log
To work around this, use:
gem update --system 3.1.4
Then, install Bundler to manage RubyGems:
gem install bundler
Then, a workaround to be able to work with bundler in Ruby-3.0.0, for Windows OR Linux:
gem install net-http-persistent -v 2.9.4
In your directory if you're working on a project, you should be able to do
bundle install
I had some problems with setting up my sinatra and puma server environment, but Ruby 3.0.0 works as if it were < 3.0.0 otherwise!
Enjoy Your Speed Boost!
Happy New Year!