module CodeRay::PluginHost

def make_plugin_hash
  @plugin_map_loaded ||= false
  Hash.new do |h, plugin_id|
    id = validate_id(plugin_id)
    path = path_to id
    begin
      raise LoadError, "#{path} not found" unless File.exist? path
      require path
    rescue LoadError => boom
      if @plugin_map_loaded
        if h.has_key?(:default)
          warn '%p could not load plugin %p; falling back to %p' % [self, id, h[:default]]
          h[:default]
        else
          raise PluginNotFound, '%p could not load plugin %p: %s' % [self, id, boom]
        end
      else
        load_plugin_map
        h[plugin_id]
      end
    else
      # Plugin should have registered by now
      if h.has_key? id
        h[id]
      else
        raise PluginNotFound, "No #{self.name} plugin for #{id.inspect} found in #{path}."
      end
    end
  end
end