Class: FPM::Cookery::Book

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/fpm/cookery/book.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Book

Returns a new instance of Book.



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# File 'lib/fpm/cookery/book.rb', line 11

def initialize
  @recipe = nil
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/fpm/cookery/book.rb', line 9

def config
  @config
end

#filename ⇒ Object

Returns the value of attribute filename.



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# File 'lib/fpm/cookery/book.rb', line 9

def filename
  @filename
end

Instance Method Details

#add_recipe_class(klass) ⇒ Object 



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# File 'lib/fpm/cookery/book.rb', line 25

def add_recipe_class(klass)
  @recipe = klass
end

#inject_class_methods!(klass) ⇒ Object

Hijack the recipe singleton to make the filename and config objects available when a descendent of BaseRecipe is declared. This makes it possible to do Hiera lookups at class definition time.



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# File 'lib/fpm/cookery/book.rb', line 32

def inject_class_methods!(klass)
  # It's necessary to close over local variables because the receiver
  # changes within the scope of +define_method+, so +self.filename+ would
  # wrongly refer to +singleton_klass.filename+.
  filename = self.filename
  config = self.config

  singleton_klass = (class << klass ; self ; end)

  singleton_klass.send(:define_method, :filename) do
    filename
  end

  singleton_klass.send(:define_method, :config) do
    config
  end
end

#load_recipe(filename, config, &callback) ⇒ Object

Load the given file and instantiate an object. Wrap the class in an anonymous module to avoid namespace cluttering. (see Kernel.load)



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# File 'lib/fpm/cookery/book.rb', line 17

def load_recipe(filename, config, &callback)
  @filename = FPM::Cookery::Path.new(filename).realpath
  @config = config

  Kernel.load(@filename.to_path, true)
  callback.call(@recipe.new)
end