Class: Adhearsion::Plugin

Inherits:
Object show all
Defined in:
lib/adhearsion/plugin.rb,
lib/adhearsion/plugin/collection.rb,
lib/adhearsion/plugin/initializer.rb

Overview

Plugin is the core of extension of Adhearsion framework and provides the easiest path to add new functionality, configuration or modify the initialization process.

Its behavior is based on Rails::Railtie, so if you are familiar with Rails this will be easier for you to start using Adhearsion::Plugin, but of course no previous knowledge is required.

With an Adhearsion Plugin you can:

  • create initializers

  • add rake tasks to Adhearsion

  • add/modify configuration files

How to create your Adhearsion Plugin

Create a class that inherits from Adhearsion::Plugin within your plugin namespace. This class shall be loaded during your awesome Adhearsion application boot process.

# lib/my_plugin/plugin.rb
module MyPlugin
  class Plugin < Adhearsion::Plugin
  end
end

Execute a specific code while initializing Adhearison

module MyPlugin
  class Plugin < Adhearsion::Plugin
    init :my_plugin do
      logger.warn "I want to ensure my plugin is being loaded!!!"
    end
  end
end

As Rails::Railtie does, you can define the exact point when you want to load your plugin during the initialization process.

module MyPlugin
  class Plugin < Adhearsion::Plugin
    init :my_plugin, :after => :my_other_plugin do
      logger.warn "My Plugin depends on My Other Plugin, so it must be loaded after"
    end
  end
end

Defined Under Namespace

Classes: Collection, Initializer

Constant Summary collapse

METHODS_OPTIONS = 
{:load => true, :scope => false}

Class Method Summary collapse

Class Method Details

.add(klass) ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 235

def add(klass)
  klass.ancestors.include?(self) and subclasses << klass
end

.config(name = nil, &block) ⇒ Object

Class method that will be used by subclasses to configure the plugin

Parameters:

  • name (defaults to: nil) —

    Symbol plugin config name



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# File 'lib/adhearsion/plugin.rb', line 152

def config(name = nil, &block)
  if name.nil?
    name = self.plugin_name
  else
    self.plugin_name = name
  end

  if block_given?
    opts = {}
    opts[:after] ||= configs.last.name unless configs.empty?
    ::Loquacious::Configuration.defaults_for plugin_name, &Proc.new(&block)
    initializer = Initializer.new(plugin_name, self, opts) do
      ::Loquacious.configuration_for plugin_name, &block
    end
    Adhearsion::Plugin.configs << initializer
  else
    ::Loquacious.configuration_for plugin_name
  end
end

.configs ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 195

def configs
  @configs ||= Collection.new
end

.configure_plugins(*args) ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 176

def configure_plugins(*args)
  configs.tsort.each do |config|
    config.run(*args)
  end
end

.count ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 231

def count
  subclasses.length
end

.delete(plugin_name) ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 239

def delete(plugin_name)
  plugin_name.ancestors.include?(self) and plugin_name = plugin_name.plugin_name
  subclasses.delete_if { |plugin| plugin.plugin_name.eql? plugin_name }
end

.delete_all ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 244

def delete_all
  @subclasses = nil
end

.generators(mapping) ⇒ Object

Register generator classes

Examples:

FooBar = Class.new Adhearsion::Plugin do
  generators :'my_plugin:foo_generator' => FooGenerator
end


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# File 'lib/adhearsion/plugin.rb', line 121

def generators(mapping)
  mapping.each_pair do |name, klass|
    Generators.add_generator name, klass
  end
end

.init(name = nil, opts = {}, &block) ⇒ Object

Class method that will be used by subclasses to initialize the plugin

Parameters:

  • name (defaults to: nil) —

    Symbol plugin initializer name

  • opts (defaults to: {}) —

    Hash

    • :before specify the plugin to be loaded before another plugin

    • :after specify the plugin to be loaded after another plugin



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# File 'lib/adhearsion/plugin.rb', line 212

def init(name = nil, opts = {}, &block)
  name = plugin_name unless name
  block_given? or raise ArgumentError, "A block must be passed while defining the Plugin initialization process"
  opts[:after] ||= initializers.last.name unless initializers.empty? || initializers.find { |i| i.name == opts[:before] }
  Adhearsion::Plugin.initializers << Initializer.new(name, self, opts, &block)
end

.init_plugins(*args) ⇒ Object

Recursively initialization of all the loaded plugins



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# File 'lib/adhearsion/plugin.rb', line 183

def init_plugins(*args)
  initializers.tsort.each do |initializer|
    initializer.run(*args)
  end
end

.initializers ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 199

def initializers
  @initializers ||= Collection.new
end

.load_tasks ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 106

def load_tasks
  container = Object.new.tap { |o| o.extend Rake::DSL if defined? Rake::DSL }
  tasks.each do |block|
    container.instance_eval(&block)
  end
end

.plugin_name(name = nil) ⇒ Object Also known as: app_name 



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# File 'lib/adhearsion/plugin.rb', line 136

def plugin_name(name = nil)
  if name.nil?
    @plugin_name ||= ActiveSupport::Inflector.underscore(self.name)
  else
    self.plugin_name = name
  end
end

.plugin_name=(name) ⇒ Object Also known as: app_name= 



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# File 'lib/adhearsion/plugin.rb', line 145

def plugin_name=(name)
  @plugin_name = name
end

.reset_rake_tasks ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 102

def reset_rake_tasks
  @@rake_tasks = []
end

.run(name = nil, opts = {}, &block) ⇒ Object

Class method that will be used by subclasses to run the plugin

Parameters:

  • name (defaults to: nil) —

    Symbol plugin initializer name

  • opts (defaults to: {}) —

    Hash

    • :before specify the plugin to be loaded before another plugin

    • :after specify the plugin to be loaded after another plugin



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# File 'lib/adhearsion/plugin.rb', line 224

def run(name = nil, opts = {}, &block)
  name = plugin_name unless name
  block_given? or raise ArgumentError, "A block must be passed while defining the Plugin run process"
  opts[:after] ||= runners.last.name unless runners.empty? || runners.find { |i| i.name == opts[:before] }
  Adhearsion::Plugin.runners << Initializer.new(name, self, opts, &block)
end

.run_plugins(*args) ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 189

def run_plugins(*args)
  runners.tsort.each do |runner|
    runner.run(*args)
  end
end

.runners ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 203

def runners
  @runners ||= Collection.new
end

.show_description ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 172

def show_description
  ::Loquacious::Configuration.help_for plugin_name
end

.subclasses ⇒ Object 



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# File 'lib/adhearsion/plugin.rb', line 127

def subclasses
  @subclasses ||= []
end

.tasks(&block) ⇒ Object

Class method that allows any subclass (any Adhearsion plugin) to register rake tasks.

  • Example 1:

    FooBar = Class.new Adhearsion::Plugin do
  tasks do
    namespace :foo_bar do
      desc "Prints the FooBar plugin version"
      task :version do
        STDOUT.puts "FooBar plugin v0.1"
      end
    end
  end
end

  • Example 2:

    FooBar = Class.new Adhearsion::Plugin do
  tasks do
    load "tasks/foo_bar.rake"
  end
end

= tasks/foo_bar.rake

 namespace :foo_bar do
   desc "Prints the FooBar plugin version"
   task :version do
     STDOUT.puts "FooBar plugin v0.1"
   end
 end



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# File 'lib/adhearsion/plugin.rb', line 97

def tasks(&block)
  @@rake_tasks << Proc.new(&block) if block_given?
  @@rake_tasks
end