Puppet manifest version detection code

version_info.pp

if versioncmp($::puppetversion, '4') > 0 {
  notify {'Puppet 4.0.0 or newer': }
  # Use AIO paths, puppet_gem and puppetserver_gem providers,
  # multiple providers for a single package, etc.
} else {
  case $::puppetversion  {
    /Puppet Enterprise/: {
      notify {'PE 3.x': }
      # Use PE paths, pe_gem and pe_puppetserver_gem providers.
    }
    default: {
      notify {'Puppet 3.x Open Source': }
      # Use system paths and puppetserver_gem provider.
    }
  }
}