Solargraph is a Ruby Language Server. It’s meant to add code completion and inline documentation onto IDEs.

We have to install the gem first

gem install solargraph

Within Sublime Text Control Panel (CTRL+Shift+P) :

  1. Find Package Control: Install Package
  2. Then LSP
  3. Hit enter

By default, the ST plugin will look for rvm, not rbenv. We have to force the settings Preferences > Package Settings > LSP > Settings, and paste this :

Note : you need to adjust the value of the path on line 8. You can find the exact installation path of solargraph on your system with the following command

which solargraph

Finally we can enable the server via the Sublime Text Control Panel (CTRL+Shift+P)