Ruby script to connect/disconnect VPN with service and (optional) configuration name

vpn.rb

#!/usr/bin/env ruby
# Thanks to: https://gist.github.com/kawaz/8bd7db8416f90c3cc168f12c8c75b6d3
# Usage: vpn (connect|disconnect) SERVICE_NAME [CONFIGURATION_NAME]

require "json"

SCRIPT = <<-JS
function run(json) {
  var argv = JSON.parse(json);
  var sysev = Application("System Events");
  var action = argv.action;
  var service = sysev.networkPreferences.services[argv.service];

  if (argv.config) {
    var config = service.configurations[argv.config]
    sysev[action](config);
  } else {
    sysev[action](service);
  }
}
JS

action, service, config, * = ARGV
case action
when "connect", "disconnect"
else
  raise "Unknown action: #{action}"
end

unless service
  raise "Service required"
end

argv = {
  action: action,
  service: service,
  config: config,
}

exec "/usr/bin/osascript", "-l", "JavaScript", "-e", SCRIPT, argv.to_json