Class: Rails::Plugin::Loader

Inherits:
Object
  • Object
show all
Defined in:
lib/rails/plugin/loader.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(initializer) ⇒ Loader

Creates a new Plugin::Loader instance, associated with the given Rails::Initializer. This default implementation automatically locates all plugins, and adds all plugin load paths, when it is created. The plugins are then fully loaded (init.rb is evaluated) when load_plugins is called.

It is the loader’s responsibility to ensure that only the plugins specified in the configuration are actually loaded, and that the order defined is respected.



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# File 'lib/rails/plugin/loader.rb', line 16

def initialize(initializer)
  @initializer = initializer
end

Instance Attribute Details

#initializer ⇒ Object (readonly)

Returns the value of attribute initializer.



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# File 'lib/rails/plugin/loader.rb', line 6

def initializer
  @initializer
end

Instance Method Details

#add_plugin_load_paths ⇒ Object

Adds the load paths for every plugin into the $LOAD_PATH. Plugin load paths are added after the application’s lib directory, to ensure that an application can always override code within a plugin.

Plugin load paths are also added to Dependencies.autoload_paths, and Dependencies.autoload_once_paths.



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# File 'lib/rails/plugin/loader.rb', line 52

def add_plugin_load_paths
  plugins.each do |plugin|
    plugin.load_paths.each do |path|
      $LOAD_PATH.insert(application_lib_index + 1, path)

      ActiveSupport::Dependencies.autoload_paths << path

      unless configuration.reload_plugins?
        ActiveSupport::Dependencies.autoload_once_paths << path
      end
    end
  end

  $LOAD_PATH.uniq!
end

#all_plugins ⇒ Object

Returns all the plugins that could be found by the current locators.



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# File 'lib/rails/plugin/loader.rb', line 31

def all_plugins
  @all_plugins ||= locate_plugins
  @all_plugins
end

#engine_metal_paths ⇒ Object 



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# File 'lib/rails/plugin/loader.rb', line 68

def engine_metal_paths
  engines.collect(&:metal_path)
end

#engines ⇒ Object

Returns the plugins that are in engine-form (have an app/ directory)



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# File 'lib/rails/plugin/loader.rb', line 26

def engines
  @engines ||= plugins.select(&:engine?)
end

#load_plugins ⇒ Object 



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# File 'lib/rails/plugin/loader.rb', line 36

def load_plugins
  plugins.each do |plugin|
    plugin.load(initializer)
    register_plugin_as_loaded(plugin)
  end

  configure_engines

  ensure_all_registered_plugins_are_loaded!
end

#plugins ⇒ Object

Returns the plugins to be loaded, in the order they should be loaded.



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# File 'lib/rails/plugin/loader.rb', line 21

def plugins
  @plugins ||= all_plugins.select { |plugin| should_load?(plugin) }.sort { |p1, p2| order_plugins(p1, p2) }
end