Class: Chef::Node

Inherits:
Object
  • Object
show all
Extended by:
Forwardable
Includes:
DSL::IncludeAttribute, DSL::Universal, Mixin::FromFile, Mixin::ParamsValidate
Defined in:
lib/chef/node.rb,
lib/chef/node/attribute.rb,
lib/chef/node/common_api.rb,
lib/chef/node/mixin/state_tracking.rb,
lib/chef/node/attribute_collections.rb,
lib/chef/node/immutable_collections.rb,
lib/chef/node/mixin/deep_merge_cache.rb,
lib/chef/node/mixin/immutablize_hash.rb,
lib/chef/node/mixin/immutablize_array.rb

Defined Under Namespace

Modules: CommonAPI, Immutablize, Mixin Classes: AttrArray, Attribute, ImmutableArray, ImmutableMash, VividMash

Constant Summary collapse

NULL_ARG = 
Object.new

Instance Attribute Summary collapse

Attributes included from Mixin::FromFile

#source_file

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Mixin::ParamsValidate

#lazy, #set_or_return, #validate

Methods included from Mixin::ShellOut

#a_to_s, #clean_array, #shell_out, #shell_out!, #shell_out_compact, #shell_out_compact!, #shell_out_compact_timeout, #shell_out_compact_timeout!, #shell_out_with_systems_locale, #shell_out_with_systems_locale!

Methods included from Mixin::PathSanity

#enforce_path_sanity, #sanitized_path

Methods included from Mixin::PowershellOut

#powershell_out, #powershell_out!

Methods included from Mixin::WindowsArchitectureHelper

#assert_valid_windows_architecture!, #disable_wow64_file_redirection, #forced_32bit_override_required?, #is_i386_process_on_x86_64_windows?, #node_supports_windows_architecture?, #node_windows_architecture, #restore_wow64_file_redirection, #valid_windows_architecture?, #with_os_architecture, #wow64_architecture_override_required?, #wow64_directory

Methods included from Mixin::PowershellExec

#powershell_exec

Methods included from DSL::PlatformIntrospection

#docker?, #platform?, #platform_family?, #value_for_platform, #value_for_platform_family

Methods included from DSL::IncludeAttribute

#include_attribute, #parse_attribute_file_spec

Methods included from Mixin::FromFile

#class_from_file, #from_file

Constructor Details

#initialize(chef_server_rest: nil, logger: nil) ⇒ Node

Create a new Chef::Node object.



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# File 'lib/chef/node.rb', line 71

def initialize(chef_server_rest: nil, logger: nil)
  @chef_server_rest = chef_server_rest
  @name = nil
  @logger = logger || Chef::Log.with_child(subsystem: "node")

  @chef_environment = "_default"
  @primary_runlist = Chef::RunList.new
  @override_runlist = Chef::RunList.new

  @policy_name = nil
  @policy_group = nil

  @attributes = Chef::Node::Attribute.new({}, {}, {}, {}, self)

  @run_state = {}
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

Only works for attribute fetches, setting is no longer supported XXX: this should be deprecated



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# File 'lib/chef/node.rb', line 262

def method_missing(method, *args, &block)
  attributes.public_send(method, *args, &block)
end

Instance Attribute Details

#logger ⇒ Object (readonly)

Returns the value of attribute logger.



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# File 'lib/chef/node.rb', line 52

def logger
  @logger
end

#override_runlist(*args) ⇒ Object 



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# File 'lib/chef/node.rb', line 303

def override_runlist(*args)
  args.length > 0 ? @override_runlist.reset!(args) : @override_runlist
end

#recipe_list ⇒ Object

Returns the value of attribute recipe_list.



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# File 'lib/chef/node.rb', line 50

def recipe_list
  @recipe_list
end

#run_context ⇒ Object

RunContext will set itself as run_context via this setter when initialized. This is needed so DSL::IncludeAttribute (in particular, #include_recipe) can access the run_context to determine if an attributes file has been seen yet. – TODO: This is a pretty ugly way to solve that problem.



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# File 'lib/chef/node.rb', line 60

def run_context
  @run_context
end

#run_state ⇒ Object

Returns the value of attribute run_state.



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# File 'lib/chef/node.rb', line 50

def run_state
  @run_state
end

Class Method Details

.build(node_name) ⇒ Object 



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# File 'lib/chef/node.rb', line 584

def self.build(node_name)
  node = new
  node.name(node_name)
  node.chef_environment(Chef::Config[:environment]) unless Chef::Config[:environment].nil? || Chef::Config[:environment].chomp.empty?
  node
end

.find_or_create(node_name) ⇒ Object 



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# File 'lib/chef/node.rb', line 576

def self.find_or_create(node_name)
  load(node_name)
rescue Net::HTTPServerException => e
  raise unless e.response.code == "404"
  node = build(node_name)
  node.create
end

.from_hash(o) ⇒ Object 



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# File 'lib/chef/node.rb', line 522

def self.from_hash(o)
  return o if o.kind_of? Chef::Node
  node = new
  node.name(o["name"])

  node.policy_name = o["policy_name"] if o.has_key?("policy_name")
  node.policy_group = o["policy_group"] if o.has_key?("policy_group")

  unless node.policy_group.nil?
    node.chef_environment(o["policy_group"])
  else
    node.chef_environment(o["chef_environment"])
  end

  if o.has_key?("attributes")
    node.normal_attrs = o["attributes"]
  end
  node.automatic_attrs = Mash.new(o["automatic"]) if o.has_key?("automatic")
  node.normal_attrs = Mash.new(o["normal"]) if o.has_key?("normal")
  node.default_attrs = Mash.new(o["default"]) if o.has_key?("default")
  node.override_attrs = Mash.new(o["override"]) if o.has_key?("override")

  if o.has_key?("run_list")
    node.run_list.reset!(o["run_list"])
  elsif o.has_key?("recipes")
    o["recipes"].each { |r| node.recipes << r }
  end

  node
end

.list(inflate = false) ⇒ Object 



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# File 'lib/chef/node.rb', line 563

def self.list(inflate = false)
  if inflate
    response = Hash.new
    Chef::Search::Query.new.search(:node) do |n|
      n = Chef::Node.from_hash(n)
      response[n.name] = n unless n.nil?
    end
    response
  else
    Chef::ServerAPI.new(Chef::Config[:chef_server_url]).get("nodes")
  end
end

.list_by_environment(environment, inflate = false) ⇒ Object 



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

def self.list_by_environment(environment, inflate = false)
  if inflate
    response = Hash.new
    Chef::Search::Query.new.search(:node, "chef_environment:#{environment}") { |n| response[n.name] = n unless n.nil? }
    response
  else
    Chef::ServerAPI.new(Chef::Config[:chef_server_url]).get("environments/#{environment}/nodes")
  end
end

.load(name) ⇒ Object

Load a node by name



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# File 'lib/chef/node.rb', line 592

def self.load(name)
  from_hash(Chef::ServerAPI.new(Chef::Config[:chef_server_url]).get("nodes/#{name}"))
end

Instance Method Details

#<=>(other) ⇒ Object 



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# File 'lib/chef/node.rb', line 648

def <=>(other)
  name <=> other.name
end

#==(other) ⇒ Object 



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# File 'lib/chef/node.rb', line 640

def ==(other)
  if other.kind_of?(self.class)
    name == other.name
  else
    false
  end
end

#[](attrib) ⇒ Object

Return an attribute of this node. Returns nil if the attribute is not found.



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# File 'lib/chef/node.rb', line 195

def [](attrib)
  attributes[attrib]
end

#apply_expansion_attributes(expansion) ⇒ Object

Apply the default and overrides attributes from the expansion passed in, which came from roles.



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# File 'lib/chef/node.rb', line 442

def apply_expansion_attributes(expansion)
  loaded_environment = if chef_environment == "_default"
                         Chef::Environment.new.tap { |e| e.name("_default") }
                       else
                         Chef::Environment.load(chef_environment)
                       end

  attributes.env_default = loaded_environment.default_attributes
  attributes.env_override = loaded_environment.override_attributes

  attribute.role_default = expansion.default_attrs
  attributes.role_override = expansion.override_attrs
end

#attribute?(attrib) ⇒ Boolean

Return true if this Node has a given attribute, false if not. Takes either a symbol or a string.

Only works on the top level. Preferred way is to use the normal [] style lookup and call attribute?()

Returns:

  • (Boolean) 


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# File 'lib/chef/node.rb', line 246

def attribute?(attrib)
  attributes.attribute?(attrib)
end

#attributes ⇒ Object Also known as: attribute, construct_attributes 



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# File 'lib/chef/node.rb', line 187

def attributes
  @attributes
end

#automatic_attrs ⇒ Object 



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# File 'lib/chef/node.rb', line 233

def automatic_attrs
  attributes.automatic
end

#automatic_attrs=(new_values) ⇒ Object 



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# File 'lib/chef/node.rb', line 237

def automatic_attrs=(new_values)
  attributes.automatic = new_values
end

#chef_environment(arg = nil) ⇒ Object Also known as: environment 



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# File 'lib/chef/node.rb', line 129

def chef_environment(arg = nil)
  set_or_return(
    :chef_environment,
    arg,
    { :regex => /^[\-[:alnum:]_]+$/, :kind_of => String }
  )
end

#chef_environment=(environment) ⇒ Object 



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# File 'lib/chef/node.rb', line 137

def chef_environment=(environment)
  chef_environment(environment)
end

#chef_server_rest ⇒ Object 



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# File 'lib/chef/node.rb', line 102

def chef_server_rest
  # for saving node data we use validate_utf8: false which will not
  # raise an exception on bad utf8 data, but will replace the bad
  # characters and render valid JSON.
  @chef_server_rest ||= Chef::ServerAPI.new(
    Chef::Config[:chef_server_url],
    client_name: Chef::Config[:node_name],
    signing_key_filename: Chef::Config[:client_key],
    validate_utf8: false
  )
end

#consume_attributes(attrs) ⇒ Object

Consumes the combined run_list and other attributes in attrs



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# File 'lib/chef/node.rb', line 351

def consume_attributes(attrs)
  normal_attrs_to_merge = consume_run_list(attrs)
  normal_attrs_to_merge = consume_chef_environment(normal_attrs_to_merge)
  # FIXME(log): should be trace
  logger.debug("Applying attributes from json file")
  self.normal_attrs = Chef::Mixin::DeepMerge.merge(normal_attrs, normal_attrs_to_merge)
  tags # make sure they're defined
end

#consume_chef_environment(attrs) ⇒ Object

chef_environment when set in -j JSON will take precedence over -E ENVIRONMENT. Ideally, IMO, the order of precedence should be (lowest to

highest):
 config_file
 -j JSON
 -E ENVIRONMENT

so that users could reuse their JSON and override the chef_environment configured within it with -E ENVIRONMENT. Because command line options are merged with Chef::Config there is currently no way to distinguish between an environment set via config from an environment set via command line.



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# File 'lib/chef/node.rb', line 397

def consume_chef_environment(attrs)
  attrs = attrs ? attrs.dup : {}
  if env = attrs.delete("chef_environment")
    chef_environment(env)
  end
  attrs
end

#consume_external_attrs(ohai_data, json_cli_attrs) ⇒ Object

Consume data from ohai and Attributes provided as JSON on the command line.



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# File 'lib/chef/node.rb', line 329

def consume_external_attrs(ohai_data, json_cli_attrs)
  # FIXME(log): should be trace
  logger.debug("Extracting run list from JSON attributes provided on command line")
  consume_attributes(json_cli_attrs)

  self.automatic_attrs = ohai_data

  platform, version = Chef::Platform.find_platform_and_version(self)
  # FIXME(log): should be trace
  logger.debug("Platform is #{platform} version #{version}")
  automatic[:platform] = platform
  automatic[:platform_version] = version
  automatic[:chef_guid] = Chef::Config[:chef_guid]
  automatic[:name] = name
  automatic[:chef_environment] = chef_environment
end

#consume_ohai_data(ohai_data) ⇒ Object 



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# File 'lib/chef/node.rb', line 346

def consume_ohai_data(ohai_data)
  self.automatic_attrs = Chef::Mixin::DeepMerge.merge(automatic_attrs, ohai_data)
end

#consume_run_list(attrs) ⇒ Object

Extracts the run list from attrs and applies it. Returns the remaining attributes



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# File 'lib/chef/node.rb', line 375

def consume_run_list(attrs)
  attrs = attrs ? attrs.dup : {}
  if new_run_list = attrs.delete("recipes") || attrs.delete("run_list")
    if attrs.key?("recipes") || attrs.key?("run_list")
      raise Chef::Exceptions::AmbiguousRunlistSpecification, "please set the node's run list using the 'run_list' attribute only."
    end
    logger.info("Setting the run_list to #{new_run_list} from CLI options")
    run_list(new_run_list)
  end
  attrs
end

#create ⇒ Object

Create the node via the REST API



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# File 'lib/chef/node.rb', line 622

def create
  chef_server_rest.post("nodes", data_for_save)
  self
rescue Net::HTTPServerException => e
  # Chef Server before 12.3 rejects node JSON with 'policy_name' or
  # 'policy_group' keys, but 'policy_name' will be detected first.
  # Backcompat can be removed in 13.0
  if e.response.code == "400" && e.response.body.include?("Invalid key policy_name")
    chef_server_rest.post("nodes", data_for_save_without_policyfile_attrs)
  else
    raise
  end
end

#default ⇒ Object Also known as: default_attrs

Set a default of this node, but auto-vivify any Mashes that might be missing



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# File 'lib/chef/node.rb', line 207

def default
  attributes.default
end

#default_attrs=(new_values) ⇒ Object 



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# File 'lib/chef/node.rb', line 225

def default_attrs=(new_values)
  attributes.default = new_values
end

#destroy ⇒ Object

Remove this node via the REST API



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# File 'lib/chef/node.rb', line 597

def destroy
  chef_server_rest.delete("nodes/#{name}")
end

#display_hash ⇒ Object 



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# File 'lib/chef/node.rb', line 471

def display_hash
  display = {}
  display["name"]             = name
  display["chef_environment"] = chef_environment
  display["automatic"]        = automatic_attrs
  display["normal"]           = normal_attrs
  display["default"]          = attributes.combined_default
  display["override"]         = attributes.combined_override
  display["run_list"]         = run_list.run_list_items
  display
end

#each(&block) ⇒ Object

Yield each key of the top level to the block.



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# File 'lib/chef/node.rb', line 251

def each(&block)
  attributes.each(&block)
end

#each_attribute(&block) ⇒ Object

Iterates over each attribute, passing the attribute and value to the block.



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# File 'lib/chef/node.rb', line 256

def each_attribute(&block)
  attributes.each_attribute(&block)
end

#expand!(data_source = "server") ⇒ Object

Expands the node’s run list and sets the default and override attributes. Also applies stored attributes (from json provided on the command line)

Returns the fully-expanded list of recipes, a RunListExpansion.

– TODO: timh/cw, 5-14-2010: Should this method exist? Should we instead modify default_attrs and override_attrs whenever our run_list is mutated? Or perhaps do something smarter like on-demand generation of default_attrs and override_attrs, invalidated only when run_list is mutated?

Raises:



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# File 'lib/chef/node.rb', line 424

def expand!(data_source = "server")
  expansion = run_list.expand(chef_environment, data_source)
  raise Chef::Exceptions::MissingRole, expansion if expansion.errors?

  tags # make sure they're defined

  automatic_attrs[:recipes] = expansion.recipes.with_duplicate_names
  automatic_attrs[:expanded_run_list] = expansion.recipes.with_fully_qualified_names_and_version_constraints
  automatic_attrs[:roles] = expansion.roles

  apply_expansion_attributes(expansion)

  automatic_attrs[:chef_environment] = chef_environment
  expansion
end

#for_json ⇒ Object 



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# File 'lib/chef/node.rb', line 488

def for_json
  result = {
    "name" => name,
    "chef_environment" => chef_environment,
    "json_class" => self.class.name,
    "automatic" => attributes.automatic,
    "normal" => attributes.normal,
    "chef_type" => "node",
    "default" => attributes.combined_default,
    "override" => attributes.combined_override,
    #Render correctly for run_list items so malformed json does not result
    "run_list" => @primary_runlist.run_list.map { |item| item.to_s },
  }
  # Chef Server rejects node JSON with extra keys; prior to 12.3,
  # "policy_name" and "policy_group" are unknown; after 12.3 they are
  # optional, therefore only including them in the JSON if present
  # maximizes compatibility for most people.
  unless policy_group.nil? && policy_name.nil?
    result["policy_name"] = policy_name
    result["policy_group"] = policy_group
  end
  result
end

#loaded_recipe(cookbook, recipe) ⇒ Object

used by include_recipe to add recipes to the expanded run_list to be saved back to the node and be searchable



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# File 'lib/chef/node.rb', line 284

def loaded_recipe(cookbook, recipe)
  fully_qualified_recipe = "#{cookbook}::#{recipe}"

  automatic_attrs[:recipes] << fully_qualified_recipe unless Array(self[:recipes]).include?(fully_qualified_recipe)
end

#name(arg = nil) ⇒ Object

Set the name of this Node, or return the current name.



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# File 'lib/chef/node.rb', line 115

def name(arg = nil)
  if !arg.nil?
    validate(
             { :name => arg },
             { :name => { :kind_of => String,
                          :cannot_be => :blank,
                          :regex => /^[\-[:alnum:]_:.]+$/ },
             })
    @name = arg
  else
    @name
  end
end

#node ⇒ Object

Used by DSL



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# File 'lib/chef/node.rb', line 98

def node
  self
end

#normal ⇒ Object Also known as: normal_attrs

Set a normal attribute of this node, but auto-vivify any Mashes that might be missing



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# File 'lib/chef/node.rb', line 201

def normal
  attributes.normal
end

#normal_attrs=(new_values) ⇒ Object 



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# File 'lib/chef/node.rb', line 229

def normal_attrs=(new_values)
  attributes.normal = new_values
end

#override ⇒ Object Also known as: override_attrs

Set an override attribute of this node, but auto-vivify any Mashes that might be missing



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# File 'lib/chef/node.rb', line 213

def override
  attributes.override
end

#override_attrs=(new_values) ⇒ Object 



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# File 'lib/chef/node.rb', line 221

def override_attrs=(new_values)
  attributes.override = new_values
end

#policy_group(arg = NULL_ARG) ⇒ String

The ‘policy_group` for this node. Setting this to a non-nil value will enable policyfile mode when `chef-client` is run. If set in the config file or in node json, running `chef-client` will update this value.

Parameters:

  • arg (String) (defaults to: NULL_ARG) —

    the new policy_group value

Returns:

  • (String) —

    the current policy_group, or the one you just set

See Also:



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# File 'lib/chef/node.rb', line 174

def policy_group(arg = NULL_ARG)
  return @policy_group if arg.equal?(NULL_ARG)
  validate({ policy_group: arg }, { policy_group: { kind_of: [ String, NilClass ], regex: /^[\-:.[:alnum:]_]+$/ } })
  @policy_group = arg
end

#policy_group=(policy_group) ⇒ Object

A “non-DSL-style” setter for ‘policy_group`

See Also:



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# File 'lib/chef/node.rb', line 183

def policy_group=(policy_group)
  policy_group(policy_group)
end

#policy_name(arg = NULL_ARG) ⇒ String

The ‘policy_name` for this node. Setting this to a non-nil value will enable policyfile mode when `chef-client` is run. If set in the config file or in node json, running `chef-client` will update this value.

Parameters:

  • arg (String) (defaults to: NULL_ARG) —

    the new policy_name value

Returns:

  • (String) —

    the current policy_name, or the one you just set

See Also:



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# File 'lib/chef/node.rb', line 152

def policy_name(arg = NULL_ARG)
  return @policy_name if arg.equal?(NULL_ARG)
  validate({ policy_name: arg }, { policy_name: { kind_of: [ String, NilClass ], regex: /^[\-:.[:alnum:]_]+$/ } })
  @policy_name = arg
end

#policy_name=(policy_name) ⇒ Object

A “non-DSL-style” setter for ‘policy_name`

See Also:



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# File 'lib/chef/node.rb', line 161

def policy_name=(policy_name)
  policy_name(policy_name)
end

#primary_runlist ⇒ Object 



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# File 'lib/chef/node.rb', line 298

def primary_runlist
  @primary_runlist
end

#recipe?(recipe_name) ⇒ Boolean

Returns true if this Node expects a given recipe, false if not.

First, the run list is consulted to see whether the recipe is explicitly included. If it’s not there, it looks in ‘node`, which is populated when the run_list is expanded

NOTE: It’s used by cookbook authors

Returns:

  • (Boolean) 


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# File 'lib/chef/node.rb', line 278

def recipe?(recipe_name)
  run_list.include?(recipe_name) || Array(self[:recipes]).include?(recipe_name)
end

#reset_defaults_and_overrides ⇒ Object

Clear defaults and overrides, so that any deleted attributes between runs are still gone.



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# File 'lib/chef/node.rb', line 407

def reset_defaults_and_overrides
  default.clear
  override.clear
end

#respond_to_missing?(method, include_private = false) ⇒ Boolean

Fix respond_to + method so that it works with method_missing delegation

Returns:

  • (Boolean) 


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# File 'lib/chef/node.rb', line 267

def respond_to_missing?(method, include_private = false)
  attributes.respond_to?(method, false)
end

#role?(role_name) ⇒ Boolean

Returns true if this Node expects a given role, false if not.

Parameters:

  • role_name (String) —

    Role to check for

Returns:

  • (Boolean) 


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# File 'lib/chef/node.rb', line 294

def role?(role_name)
  Array(self[:roles]).include?(role_name)
end

#run_list(*args) ⇒ Object

Returns an Array of roles and recipes, in the order they will be applied. If you call it with arguments, they will become the new list of roles and recipes.



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# File 'lib/chef/node.rb', line 313

def run_list(*args)
  rl = select_run_list
  args.length > 0 ? rl.reset!(args) : rl
end

#run_list=(list) ⇒ Object 



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# File 'lib/chef/node.rb', line 318

def run_list=(list)
  rl = select_run_list
  rl = list
end

#run_list?(item) ⇒ Boolean

Returns true if this Node expects a given role, false if not.

Returns:

  • (Boolean) 


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# File 'lib/chef/node.rb', line 324

def run_list?(item)
  run_list.detect { |r| r == item } ? true : false
end

#save ⇒ Object

Save this node via the REST API



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# File 'lib/chef/node.rb', line 602

def save
  # Try PUT. If the node doesn't yet exist, PUT will return 404,
  # so then POST to create.
  begin
    if Chef::Config[:why_run]
      logger.warn("In why-run mode, so NOT performing node save.")
    else
      chef_server_rest.put("nodes/#{name}", data_for_save)
    end
  rescue Net::HTTPServerException => e
    if e.response.code == "404"
      chef_server_rest.post("nodes", data_for_save)
    else
      raise
    end
  end
  self
end

#select_run_list ⇒ Object 



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# File 'lib/chef/node.rb', line 307

def select_run_list
  @override_runlist.empty? ? @primary_runlist : @override_runlist
end

#set_cookbook_attribute ⇒ Object

after the run_context has been set on the node, go through the cookbook_collection and setup the node attribute so that it is published in the node object



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# File 'lib/chef/node.rb', line 90

def set_cookbook_attribute
  return unless run_context.cookbook_collection
  run_context.cookbook_collection.each do |cookbook_name, cookbook|
    automatic_attrs[:cookbooks][cookbook_name][:version] = cookbook.version
  end
end

#tag(*args) ⇒ Object 



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# File 'lib/chef/node.rb', line 366

def tag(*args)
  args.each do |tag|
    tags.push(tag.to_s) unless tags.include? tag.to_s
  end

  tags
end

#tags ⇒ Object

Lazy initializer for tags attribute



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# File 'lib/chef/node.rb', line 361

def tags
  normal[:tags] = Array(normal[:tags])
  normal[:tags]
end

#to_hash ⇒ Object

Transform the node to a Hash



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# File 'lib/chef/node.rb', line 457

def to_hash
  index_hash = Hash.new
  index_hash["chef_type"] = "node"
  index_hash["name"] = name
  index_hash["chef_environment"] = chef_environment
  attribute.each do |key, value|
    index_hash[key] = value
  end
  index_hash["recipe"] = run_list.recipe_names if run_list.recipe_names.length > 0
  index_hash["role"] = run_list.role_names if run_list.role_names.length > 0
  index_hash["run_list"] = run_list.run_list_items
  index_hash
end

#to_json(*a) ⇒ Object

Serialize this object as a hash



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# File 'lib/chef/node.rb', line 484

def to_json(*a)
  Chef::JSONCompat.to_json(for_json, *a)
end

#to_s ⇒ Object 



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# File 'lib/chef/node.rb', line 636

def to_s
  "node[#{name}]"
end

#update_from!(o) ⇒ Object 



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# File 'lib/chef/node.rb', line 512

def update_from!(o)
  run_list.reset!(o.run_list)
  self.automatic_attrs = o.automatic_attrs
  self.normal_attrs = o.normal_attrs
  self.override_attrs = o.override_attrs
  self.default_attrs = o.default_attrs
  chef_environment(o.chef_environment)
  self
end