class RailsEnvironment

def install(name_uri_or_plugin)
  if name_uri_or_plugin.is_a? String
    if name_uri_or_plugin =~ /:\/\//
      plugin = Plugin.new(name_uri_or_plugin)
    else
      plugin = Plugins[name_uri_or_plugin]
    end
  else
    plugin = name_uri_or_plugin
  end
  unless plugin.nil?
    plugin.install
  else
    puts "Plugin not found: #{name_uri_or_plugin}"
  end
end