Launch.json

launch.json[NEW]

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "RSpec - active spec file only",
            "type": "Ruby",
            "request": "launch",
            "program": "${workspaceRoot}/bin/rspec",
            "useBundler": true,
            // caution: ruby version and gemset are hardcoded in path
            "pathToBundler": "/Users/nicolasfabre/.rvm/gems/ruby-2.6.1@goldengate/wrappers/bundle",
            "args": [
                "-I",
                "${workspaceRoot}",
                "${file}"
            ]
        }
    ]
}

// per https://github.com/rubyide/vscode-ruby/issues/16#issuecomment-243584600

You'll need to install the following gems:

gem install ruby-debug-ide
gem install debase

and replace the pathToBundler key in the above config with your own path to bundler.