Class: Chef::RunContext

Inherits:
Object
  • Object
show all
Includes:
Mixin::LanguageIncludeRecipe
Defined in:
lib/chef/run_context.rb

Overview

Chef::RunContext

Value object that loads and tracks the context of a Chef run

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Mixin::LanguageIncludeRecipe

#include_recipe, #require_recipe

Constructor Details

#initialize(node, cookbook_collection) ⇒ RunContext

Creates a new Chef::RunContext object and populates its fields. This object gets used by the Chef Server to generate a fully compiled recipe list for a node.

Returns

object<Chef::RunContext>

Duh. :)



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# File 'lib/chef/run_context.rb', line 45

def initialize(node, cookbook_collection)
  @node = node
  @cookbook_collection = cookbook_collection
  @resource_collection = Chef::ResourceCollection.new
  @definitions = Hash.new
  
  # TODO: 5/18/2010 cw/timh - See note on Chef::Node's
  # cookbook_collection attr_accessor
  node.cookbook_collection = cookbook_collection

  load
end

Instance Attribute Details

#cookbook_collection ⇒ Object (readonly)

Returns the value of attribute cookbook_collection.



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# File 'lib/chef/run_context.rb', line 34

def cookbook_collection
  @cookbook_collection
end

#definitions ⇒ Object (readonly)

Returns the value of attribute definitions.



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# File 'lib/chef/run_context.rb', line 34

def definitions
  @definitions
end

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/chef/run_context.rb', line 34

def node
  @node
end

#resource_collection ⇒ Object

Needs to be settable so deploy can run a resource_collection independent of any cookbooks.



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# File 'lib/chef/run_context.rb', line 38

def resource_collection
  @resource_collection
end

Instance Method Details

#load ⇒ Object 



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# File 'lib/chef/run_context.rb', line 58

def load
  foreach_cookbook_load_segment(:libraries) do |cookbook_name, filename|
    Chef::Log.debug("Loading cookbook #{cookbook_name}'s library file: #{filename}")
    require filename
  end
  
  foreach_cookbook_load_segment(:providers) do |cookbook_name, filename|
    Chef::Log.debug("Loading cookbook #{cookbook_name}'s providers from #{filename}")
    Chef::Provider.build_from_file(cookbook_name, filename)
  end
  
  foreach_cookbook_load_segment(:resources) do |cookbook_name, filename|
    Chef::Log.debug("Loading cookbook #{cookbook_name}'s resources from #{filename}")
    Chef::Resource.build_from_file(cookbook_name, filename)
  end

  node.load_attributes

  foreach_cookbook_load_segment(:definitions) do |cookbook_name, filename|
    Chef::Log.debug("Loading cookbook #{cookbook_name}'s definitions from #{filename}")
    resourcelist = Chef::ResourceDefinitionList.new
    resourcelist.from_file(filename)
    definitions.merge!(resourcelist.defines) do |key, oldval, newval|
      Chef::Log.info("Overriding duplicate definition #{key}, new found in #{filename}")
      newval
    end
  end

  # Retrieve the fully expanded list of recipes for the node by
  # resolving roles; this step also merges attributes into the
  # node from the roles/recipes included.
  recipe_names = node.expand!

  recipe_names.each do |recipe_name|
    # TODO: timh/cw, 5-14-2010: It's distasteful to be including
    # the DSL in a class outside the context of the DSL
    include_recipe(recipe_name)
  end
end