Class: Chef::RunContext

Inherits:
Object
  • Object
show all
Includes:
Deprecated
Defined in:
lib/chef/run_context.rb,
lib/chef/run_context/cookbook_compiler.rb

Overview

Chef::RunContext

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

Direct Known Subclasses

ChildRunContext

Defined Under Namespace

Modules: Deprecated Classes: ChildRunContext, CookbookCompiler

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Deprecated

#audits=, #delayed_notification_collection=, #immediate_notification_collection=

Constructor Details

#initialize(node, cookbook_collection, events) ⇒ 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.

Parameters:



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# File 'lib/chef/run_context.rb', line 142

def initialize(node, cookbook_collection, events)
  @node = node
  @cookbook_collection = cookbook_collection
  @events = events

  node.run_context = self
  node.set_cookbook_attribute

  @definitions = Hash.new
  @loaded_recipes_hash = {}
  @loaded_attributes_hash = {}
  @reboot_info = {}
  @cookbook_compiler = nil

  initialize_child_state
end

Instance Attribute Details

#audits ⇒ Object (readonly)

The list of control groups to execute during the audit phase



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# File 'lib/chef/run_context.rb', line 100

def audits
  @audits
end

#before_notification_collection ⇒ Hash[String, Array[Chef::Resource::Notification]] (readonly)

A Hash containing the before notifications triggered by resources during the converge phase of the chef run.

Returns:



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# File 'lib/chef/run_context.rb', line 113

def before_notification_collection
  @before_notification_collection
end

#cookbook_collection ⇒ Chef::CookbookCollection (readonly)

The set of cookbooks involved in this run

Returns:



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# File 'lib/chef/run_context.rb', line 51

def cookbook_collection
  @cookbook_collection
end

#definitions ⇒ Array[Chef::ResourceDefinition] (readonly)

Resource Definitions for this run. Populated when the files in definitions/ are evaluated (this is triggered by #load).

Returns:



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# File 'lib/chef/run_context.rb', line 59

def definitions
  @definitions
end

#delayed_notification_collection ⇒ Hash[String, Array[Chef::Resource::Notification]] (readonly)

A Hash containing the delayed (end of run) notifications triggered by resources during the converge phase of the chef run.

Returns:



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# File 'lib/chef/run_context.rb', line 131

def delayed_notification_collection
  @delayed_notification_collection
end

#events ⇒ Chef::EventDispatch::Dispatcher (readonly)

Event dispatcher for this run.

Returns:



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# File 'lib/chef/run_context.rb', line 66

def events
  @events
end

#immediate_notification_collection ⇒ Hash[String, Array[Chef::Resource::Notification]] (readonly)

A Hash containing the immediate notifications triggered by resources during the converge phase of the chef run.

Returns:



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# File 'lib/chef/run_context.rb', line 122

def immediate_notification_collection
  @immediate_notification_collection
end

#node ⇒ Chef::Node (readonly)

The node for this run

Returns:



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# File 'lib/chef/run_context.rb', line 44

def node
  @node
end

#parent_run_context ⇒ Chef::RunContext (readonly)

The parent run context.

Returns:

  • (Chef::RunContext) —

    The parent run context, or ‘nil` if this is the root context.



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# File 'lib/chef/run_context.rb', line 85

def parent_run_context
  @parent_run_context
end

#reboot_info ⇒ Hash

Hash of factoids for a reboot request.

Returns:

  • (Hash) 


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# File 'lib/chef/run_context.rb', line 73

def reboot_info
  @reboot_info
end

#resource_collection ⇒ Chef::ResourceCollection

The collection of resources intended to be converged (and able to be notified).

Returns:

See Also:



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# File 'lib/chef/run_context.rb', line 95

def resource_collection
  @resource_collection
end

Instance Method Details

#before_notifications(resource) ⇒ Array[Notification]

Get the list of before notifications sent by the given resource.

TODO seriously, this is actually wrong. resource.name is not unique, you need the type as well.

Returns:

  • (Array[Notification]) 


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# File 'lib/chef/run_context.rb', line 231

def before_notifications(resource)
  if resource.instance_of?(Chef::Resource)
    return before_notification_collection[resource.name]
  else
    return before_notification_collection[resource.declared_key]
  end
end

#cancel_reboot ⇒ Object 



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# File 'lib/chef/run_context.rb', line 548

def cancel_reboot
  Chef::Log.info "Changing reboot status from #{reboot_info.inspect} to {}"
  @reboot_info = {}
end

#create_child ⇒ Object

Create a child RunContext.



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# File 'lib/chef/run_context.rb', line 560

def create_child
  ChildRunContext.new(self)
end

#delayed_notifications(resource) ⇒ Array[Notification]

Get the list of delayed (end of run) notifications sent by the given resource.

TODO seriously, this is actually wrong. resource.name is not unique, you need the type as well.

Returns:

  • (Array[Notification]) 


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# File 'lib/chef/run_context.rb', line 264

def delayed_notifications(resource)
  if resource.instance_of?(Chef::Resource)
    return delayed_notification_collection[resource.name]
  else
    return delayed_notification_collection[resource.declared_key]
  end
end

#has_cookbook_file_in_cookbook?(cookbook, cb_file_name) ⇒ Boolean

Find out if the cookbook has the given file.

Parameters:

  • cookbook (String) —

    Cookbook name.

  • cb_file_name (String) —

    File name.

Returns:

  • (Boolean) —

    ‘true` if the file is in the cookbook, `false` otherwise.

See Also:



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# File 'lib/chef/run_context.rb', line 494

def has_cookbook_file_in_cookbook?(cookbook, cb_file_name)
  cookbook = cookbook_collection[cookbook]
  cookbook.has_cookbook_file_for_node?(node, cb_file_name)
end

#has_template_in_cookbook?(cookbook, template_name) ⇒ Boolean

Find out if the cookbook has the given template.

Parameters:

  • cookbook (String) —

    Cookbook name.

  • template_name (String) —

    Template name.

Returns:

  • (Boolean) —

    ‘true` if the template is in the cookbook, `false` otherwise.

See Also:



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# File 'lib/chef/run_context.rb', line 479

def has_template_in_cookbook?(cookbook, template_name)
  cookbook = cookbook_collection[cookbook]
  cookbook.has_template_for_node?(node, template_name)
end

#immediate_notifications(resource) ⇒ Array[Notification]

Get the list of immediate notifications sent by the given resource.

TODO seriously, this is actually wrong. resource.name is not unique, you need the type as well.

Returns:

  • (Array[Notification]) 


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# File 'lib/chef/run_context.rb', line 247

def immediate_notifications(resource)
  if resource.instance_of?(Chef::Resource)
    return immediate_notification_collection[resource.name]
  else
    return immediate_notification_collection[resource.declared_key]
  end
end

#include_recipe(*recipe_names, current_cookbook: nil) ⇒ Object

Evaluates the recipes recipe_names. Used by DSL::IncludeRecipe

Parameters:

  • recipe_names (Array[String]) —

    The list of recipe names (e.g. ‘my_cookbook’ or ‘my_cookbook::my_resource’).

  • current_cookbook (defaults to: nil) —

    The cookbook we are currently running in.

See Also:



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# File 'lib/chef/run_context.rb', line 285

def include_recipe(*recipe_names, current_cookbook: nil)
  result_recipes = Array.new
  recipe_names.flatten.each do |recipe_name|
    if result = load_recipe(recipe_name, current_cookbook: current_cookbook)
      result_recipes << result
    end
  end
  result_recipes
end

#initialize_child_state ⇒ Object

Initialize state that applies to both Chef::RunContext and Chef::ChildRunContext



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# File 'lib/chef/run_context.rb', line 173

def initialize_child_state
  @audits = {}
  @resource_collection = Chef::ResourceCollection.new
  @before_notification_collection = Hash.new { |h, k| h[k] = [] }
  @immediate_notification_collection = Hash.new { |h, k| h[k] = [] }
  @delayed_notification_collection = Hash.new { |h, k| h[k] = [] }
end

#load(run_list_expansion) ⇒ Object

Triggers the compile phase of the chef run.

Parameters:

See Also:



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# File 'lib/chef/run_context.rb', line 165

def load(run_list_expansion)
  @cookbook_compiler = CookbookCompiler.new(self, run_list_expansion, events)
  cookbook_compiler.compile
end

#load_recipe(recipe_name, current_cookbook: nil) ⇒ Object

Evaluates the recipe recipe_name. Used by DSL::IncludeRecipe

TODO I am sort of confused why we have both this and include_recipe …

I don't see anything different beyond accepting and returning an
array of recipes.

Parameters:

  • recipe_names (Array[String]) —

    The recipe name (e.g ‘my_cookbook’ or ‘my_cookbook::my_resource’).

  • current_cookbook (defaults to: nil) —

    The cookbook we are currently running in.

Returns:

  • A truthy value if the load occurred; ‘false` if already loaded.

See Also:



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# File 'lib/chef/run_context.rb', line 310

def load_recipe(recipe_name, current_cookbook: nil)
  Chef::Log.debug("Loading recipe #{recipe_name} via include_recipe")

  cookbook_name, recipe_short_name = Chef::Recipe.parse_recipe_name(recipe_name, current_cookbook: current_cookbook)

  if unreachable_cookbook?(cookbook_name) # CHEF-4367
    Chef::Log.warn(<<-ERROR_MESSAGE)
MissingCookbookDependency:
Recipe `#{recipe_name}` is not in the run_list, and cookbook '#{cookbook_name}'
is not a dependency of any cookbook in the run_list.  To load this recipe,
first add a dependency on cookbook '#{cookbook_name}' in the cookbook you're
including it from in that cookbook's metadata.
ERROR_MESSAGE
  end

  if loaded_fully_qualified_recipe?(cookbook_name, recipe_short_name)
    Chef::Log.debug("I am not loading #{recipe_name}, because I have already seen it.")
    false
  else
    loaded_recipe(cookbook_name, recipe_short_name)
    node.loaded_recipe(cookbook_name, recipe_short_name)
    cookbook = cookbook_collection[cookbook_name]
    cookbook.load_recipe(recipe_short_name, self)
  end
end

#load_recipe_file(recipe_file) ⇒ Chef::Recipe

Load the given recipe from a filename.

Parameters:

  • recipe_file (String) —

    The recipe filename.

Returns:

Raises:



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# File 'lib/chef/run_context.rb', line 345

def load_recipe_file(recipe_file)
  if !File.exist?(recipe_file)
    raise Chef::Exceptions::RecipeNotFound, "could not find recipe file #{recipe_file}"
  end

  Chef::Log.debug("Loading recipe file #{recipe_file}")
  recipe = Chef::Recipe.new("@recipe_files", recipe_file, self)
  recipe.from_file(recipe_file)
  recipe
end

#loaded_attribute(cookbook, attribute_file) ⇒ Object

Mark a given attribute file as having been loaded.

Parameters:

  • cookbook (String) —

    Cookbook name.

  • attribute_file (String) —

    Attribute file name.



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# File 'lib/chef/run_context.rb', line 462

def loaded_attribute(cookbook, attribute_file)
  loaded_attributes_hash["#{cookbook}::#{attribute_file}"] = true
end

#loaded_attributes ⇒ Array[String]

A list of all attributes files that have been loaded.

Stored internally using a Hash, so order is predictable.

TODO is the above statement true in a 1.9+ ruby world? Is it relevant?

Returns:

  • (Array[String]) —

    A list of attribute file names in fully qualified form, e.g. the “nginx” will be given as “nginx::default”.



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# File 'lib/chef/run_context.rb', line 405

def loaded_attributes
  loaded_attributes_hash.keys
end

#loaded_fully_qualified_attribute?(cookbook, attribute_file) ⇒ Boolean

Find out if a given attribute file has been loaded.

Parameters:

  • cookbook (String) —

    Cookbook name.

  • attribute_file (String) —

    Attribute file name.

Returns:

  • (Boolean) —

    ‘true` if the recipe has been loaded, `false` otherwise.



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# File 'lib/chef/run_context.rb', line 452

def loaded_fully_qualified_attribute?(cookbook, attribute_file)
  loaded_attributes_hash.has_key?("#{cookbook}::#{attribute_file}")
end

#loaded_fully_qualified_recipe?(cookbook, recipe) ⇒ Boolean

Find out if a given recipe has been loaded.

Parameters:

  • cookbook (String) —

    Cookbook name.

  • recipe (String) —

    Recipe name.

Returns:

  • (Boolean) —

    ‘true` if the recipe has been loaded, `false` otherwise.



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# File 'lib/chef/run_context.rb', line 417

def loaded_fully_qualified_recipe?(cookbook, recipe)
  loaded_recipes_hash.has_key?("#{cookbook}::#{recipe}")
end

#loaded_recipe(cookbook, recipe) ⇒ Object

Mark a given recipe as having been loaded.

Parameters:

  • cookbook (String) —

    Cookbook name.

  • recipe (String) —

    Recipe name.



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# File 'lib/chef/run_context.rb', line 440

def loaded_recipe(cookbook, recipe)
  loaded_recipes_hash["#{cookbook}::#{recipe}"] = true
end

#loaded_recipe?(recipe) ⇒ Boolean

Find out if a given recipe has been loaded.

Parameters:

  • recipe (String) —

    Recipe name. “nginx” and “nginx::default” yield the same results.

Returns:

  • (Boolean) —

    ‘true` if the recipe has been loaded, `false` otherwise.



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# File 'lib/chef/run_context.rb', line 429

def loaded_recipe?(recipe)
  cookbook, recipe_name = Chef::Recipe.parse_recipe_name(recipe)
  loaded_fully_qualified_recipe?(cookbook, recipe_name)
end

#loaded_recipes ⇒ Array[String]

A list of all recipes that have been loaded.

This is stored internally as a Hash, so ordering is predictable.

TODO is the above statement true in a 1.9+ ruby world? Is it relevant?

Returns:

  • (Array[String]) —

    A list of recipes in fully qualified form, e.g. the recipe “nginx” will be given as “nginx::default”.

See Also:



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# File 'lib/chef/run_context.rb', line 391

def loaded_recipes
  loaded_recipes_hash.keys
end

#notifies_before(notification) ⇒ Object

Adds an before notification to the before_notification_collection.

Parameters:



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# File 'lib/chef/run_context.rb', line 186

def notifies_before(notification)
  nr = notification.notifying_resource
  if nr.instance_of?(Chef::Resource)
    before_notification_collection[nr.name] << notification
  else
    before_notification_collection[nr.declared_key] << notification
  end
end

#notifies_delayed(notification) ⇒ Object

Adds a delayed notification to the delayed_notification_collection.

Parameters:



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# File 'lib/chef/run_context.rb', line 214

def notifies_delayed(notification)
  nr = notification.notifying_resource
  if nr.instance_of?(Chef::Resource)
    delayed_notification_collection[nr.name] << notification
  else
    delayed_notification_collection[nr.declared_key] << notification
  end
end

#notifies_immediately(notification) ⇒ Object

Adds an immediate notification to the immediate_notification_collection.

Parameters:



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# File 'lib/chef/run_context.rb', line 200

def notifies_immediately(notification)
  nr = notification.notifying_resource
  if nr.instance_of?(Chef::Resource)
    immediate_notification_collection[nr.name] << notification
  else
    immediate_notification_collection[nr.declared_key] << notification
  end
end

#open_stream(name: nil, **options) {|stream| ... } ⇒ EventDispatch::EventsOutputStream

Open a stream object that can be printed into and will dispatch to events

Parameters:

  • name (String) (defaults to: nil) —

    The name of the stream.

  • options (Hash) —

    Other options for the stream.

Yields:

  • If a block is passed, it will be run and the stream will be closed afterwards.

Yield Parameters:

Returns:



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# File 'lib/chef/run_context.rb', line 523

def open_stream(name: nil, **options)
  stream = EventDispatch::EventsOutputStream.new(events, name: name, **options)
  if block_given?
    begin
      yield stream
    ensure
      stream.close
    end
  else
    stream
  end
end

#reboot_requested? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/run_context.rb', line 553

def reboot_requested?
  reboot_info.size > 0
end

#request_reboot(reboot_info) ⇒ Object

there are options for how to handle multiple calls to these functions:

  1. first call always wins (never change reboot_info once set).

  2. last call always wins (happily change reboot_info whenever).

  3. raise an exception on the first conflict.

  4. disable reboot after this run if anyone ever calls :cancel.

  5. raise an exception on any second call.

  6. ?



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# File 'lib/chef/run_context.rb', line 543

def request_reboot(reboot_info)
  Chef::Log.info "Changing reboot status from #{self.reboot_info.inspect} to #{reboot_info.inspect}"
  @reboot_info = reboot_info
end

#resolve_attribute(cookbook_name, attr_file_name) ⇒ String

Look up an attribute filename.

Parameters:

  • cookbook_name (String) —

    The cookbook name of the attribute file.

  • attr_file_name (String) —

    The attribute file’s name (not path).

Returns:

Raises:

See Also:



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# File 'lib/chef/run_context.rb', line 369

def resolve_attribute(cookbook_name, attr_file_name)
  cookbook = cookbook_collection[cookbook_name]
  raise Chef::Exceptions::CookbookNotFound, "could not find cookbook #{cookbook_name} while loading attribute #{name}" unless cookbook

  attribute_filename = cookbook.attribute_filenames_by_short_filename[attr_file_name]
  raise Chef::Exceptions::AttributeNotFound, "could not find filename for attribute #{attr_file_name} in cookbook #{cookbook_name}" unless attribute_filename

  attribute_filename
end

#unreachable_cookbook?(cookbook_name) ⇒ Boolean

Find out whether the given cookbook is in the cookbook dependency graph.

Parameters:

  • cookbook_name (String) —

    Cookbook name.

Returns:

  • (Boolean) —

    ‘true` if the cookbook is reachable, `false` otherwise.

See Also:

  • CookbookCompiler#unreachable_cookbook?


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# File 'lib/chef/run_context.rb', line 507

def unreachable_cookbook?(cookbook_name)
  cookbook_compiler.unreachable_cookbook?(cookbook_name)
end