Class: Puppet::Type

Inherits:
Object show all
Extended by:
Enumerable, CompilableResourceType, MetaType::Manager, Util, Util::ClassGen, Util::Logging, Util::ProviderFeatures, Util::Warnings
Includes:
Comparable, Enumerable, Util, Util::Errors, Util::Logging, Util::Tagging
Defined in:
lib/puppet/type.rb

Overview

Note:

The Type class deals with multiple concerns; some methods provide an internal DSL for convenient definition of types, other methods deal with various aspects while running; wiring up a resource (expressed in Puppet DSL) with its _resource type_ (i.e. an instance of Type) to enable validation, transformation of values (munge/unmunge), etc. Lastly, Type is also responsible for dealing with Providers; the concrete implementations of the behavior that constitutes how a particular Type behaves on a particular type of system (e.g. how commands are executed on a flavor of Linux, on Windows, etc.). This means that as you are reading through the documentation of this class, you will be switching between these concepts, as well as switching between the conceptual level “a resource is an instance of a resource-type” and the actual implementation classes (Type, Resource, Provider, and various utility and helper classes).

The base class for all Puppet types.

A type describes: –

  • *Attributes* - properties, parameters, and meta-parameters are different types of attributes of a type.

    • *Properties* - these are the properties of the managed resource (attributes of the entity being managed; like a file's owner, group and mode). A property describes two states; the 'is' (current state) and the 'should' (wanted state).

      * **Ensurable** - a set of traits that control the lifecycle (create, remove, etc.) of a managed entity.
  There is a default set of operations associated with being _ensurable_, but this can be changed.
* **Name/Identity** - one property is the name/identity of a resource, the _namevar_ that uniquely identifies
  one instance of a type from all others.

    • *Parameters* - additional attributes of the type (that does not directly related to an instance of the managed resource; if an operation is recursive or not, where to look for things, etc.). A Parameter (in contrast to Property) has one current value where a Property has two (current-state and wanted-state).

    • *Meta-Parameters* - parameters that are available across all types. A meta-parameter typically has additional semantics; like the `require` meta-parameter. A new type typically does not add new meta-parameters, but you need to be aware of their existence so you do not inadvertently shadow an existing meta-parameters.

  • *Parent* - a type can have a super type (that it inherits from).

  • *Validation* - If not just a basic data type, or an enumeration of symbolic values, it is possible to provide

    validation logic for a type, properties and parameters.

  • *Munging* - munging/unmunging is the process of turning a value in external representation (as used

    by a provider) into an internal representation and vice versa. A Type supports adding custom logic for these.

  • **Auto Requirements** - a type can specify automatic relationships to resources to ensure that if they are being

    managed, they will be processed before this type.

  • *Providers* - a provider is an implementation of a type's behavior - the management of a resource in the

    system being managed. A provider is often platform specific and is selected at runtime based on
criteria/predicates specified in the configured providers. See {Puppet::Provider} for details.

  • **Device Support** - A type has some support for being applied to a device; i.e. something that is managed

    by running logic external to the device itself. There are several methods that deals with type
applicability for these special cases such as {apply_to_device}.

Additional Concepts: –

  • *Resource-type* - A _resource type_ is a term used to denote the type of a resource; internally a resource

    is really an instance of a Ruby class i.e. {Puppet::Resource} which defines its behavior as "resource data".
Conceptually however, a resource is an instance of a subclass of Type (e.g. File), where such a class describes
its interface (what can be said/what is known about a resource of this type),

  • **Managed Entity** - This is not a term in general use, but is used here when there is a need to make

    a distinction between a resource (a description of what/how something should be managed), and what it is
managing (a file in the file system). The term _managed entity_ is a reference to the "file in the file system"

  • *Isomorphism* - the quality of being isomorphic means that two resource instances with the same name

    refers to the same managed entity. Or put differently; _an isomorphic name is the identity of a resource_.
As an example, `exec` resources (that executes some command) have the command (i.e. the command line string) as
their name, and these resources are said to be non-isomorphic.

Defined Under Namespace

Classes: RelationshipMetaparam

Constant Summary

Constants included from Util

Util::AbsolutePathPosix, Util::AbsolutePathWindows, Util::DEFAULT_POSIX_MODE, Util::DEFAULT_WINDOWS_MODE, Util::RFC_3986_URI_REGEX

Constants included from Util::SymbolicFileMode

Util::SymbolicFileMode::SetGIDBit, Util::SymbolicFileMode::SetUIDBit, Util::SymbolicFileMode::StickyBit, Util::SymbolicFileMode::SymbolicMode, Util::SymbolicFileMode::SymbolicSpecialToBit

Constants included from Util::POSIX

Util::POSIX::LOCALE_ENV_VARS, Util::POSIX::USER_ENV_VARS

Constants included from Util::Docs

Util::Docs::HEADER_LEVELS

Constants included from Util::Tagging

Util::Tagging::ValidTagRegex

Class Attribute Summary collapse

Instance Attribute Summary collapse

Attributes included from Util::Docs

#doc, #nodoc

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util::Logging

clear_deprecation_warnings, debug, deprecation_warning, format_exception, get_deprecation_offender, log_and_raise, log_deprecations_to_file, log_exception, puppet_deprecation_warning, send_log, setup_facter_logging!, warn_once

Methods included from Util

absolute_path?, benchmark, chuser, clear_environment, default_env, deterministic_rand, deterministic_rand_int, exit_on_fail, get_env, get_environment, logmethods, merge_environment, path_to_uri, pretty_backtrace, replace_file, safe_posix_fork, set_env, symbolizehash, thinmark, uri_encode, uri_query_encode, uri_to_path, which, withenv, withumask

Methods included from Util::SymbolicFileMode

#normalize_symbolic_mode, #symbolic_mode_to_int, #valid_symbolic_mode?

Methods included from Util::POSIX

#get_posix_field, #gid, groups_of, #idfield, #methodbyid, #methodbyname, #search_posix_field, #uid

Methods included from MetaType::Manager

allclear, clear_misses, eachtype, loadall, newtype, rmtype, typeloader

Methods included from Util::ClassGen

genclass, genmodule, rmclass

Methods included from Enumerable

uniq

Methods included from Util::ProviderFeatures

feature, feature_module, featuredocs, features, provider_feature

Methods included from Util::Docs

#desc, #dochook, #doctable, #markdown_definitionlist, #markdown_header, #nodoc?, #pad, scrub

Methods included from Util::Warnings

clear_warnings, debug_once, maybe_log, notice_once, warnonce

Methods included from CompilableResourceType

is_3x_ruby_plugin?

Methods included from Util::Tagging

#merge_into, #merge_tags_from, #raw_tagged?, #set_tags, #tag, #tag_if_valid, #tagged?, #tags, #valid_tag?

Methods included from Util::Errors

#adderrorcontext, #devfail, #error_context, error_location, error_location_with_space, error_location_with_unknowns, #exceptwrap, #fail

Constructor Details

#initialize(hash) ⇒ Type #initialize(resource) ⇒ Type

TODO:

Unclear if this is a new Type or a new instance of a given type (the initialization ends with calling validate - which seems like validation of an instance of a given type, not a new meta type.

TODO:

Explain what the Hash and Resource are. There seems to be two different types of resources; one that causes the title to be set to resource.title, and one that causes the title to be resource.ref (“for components”) - what is a component?

Creates an instance of Type from a hash or a Resource.

Overloads:

  • #initialize(hash) ⇒ Type

    Raises:

  • #initialize(resource) ⇒ Type

    Raises:


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# File 'lib/puppet/type.rb', line 2408

def initialize(resource)
  resource = self.class.hash2resource(resource) unless resource.is_a?(Puppet::Resource)

  # The list of parameter/property instances.
  @parameters = {}

  # Set the title first, so any failures print correctly.
  if resource.type.to_s.downcase.to_sym == self.class.name
    self.title = resource.title
  else
    # This should only ever happen for components
    self.title = resource.ref
  end

  [:file, :line, :catalog, :exported, :virtual].each do |getter|
    setter = getter.to_s + "="
    val = resource.send(getter)
    self.send(setter, val) if val
  end

  merge_tags_from(resource)

  @original_parameters = resource.to_hash

  set_name(@original_parameters)

  set_default(:provider)

  set_parameters(@original_parameters)

  begin
    self.validate if self.respond_to?(:validate)
  rescue Puppet::Error, ArgumentError => detail
    error = Puppet::ResourceError.new("Validation of #{ref} failed: #{detail}")
    adderrorcontext(error, detail)
    raise error
  end

  set_sensitive_parameters(resource.sensitive_parameters)
end

Class Attribute Details

.defaultprovider ⇒ Puppet::Provider?

Note:

a warning will be issued if no default provider has been configured and a search for the most suitable provider returns more than one equally suitable provider.

The default provider, or the most suitable provider if no default provider was set.


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# File 'lib/puppet/type.rb', line 1797

def self.defaultprovider
  return @defaultprovider if @defaultprovider

  suitable = suitableprovider

  # Find which providers are a default for this system.
  defaults = suitable.find_all { |provider| provider.default? }

  # If we don't have any default we use suitable providers
  defaults = suitable if defaults.empty?
  max = defaults.collect { |provider| provider.specificity }.max
  defaults = defaults.find_all { |provider| provider.specificity == max }

  if defaults.length > 1
    Puppet.warning(_("Found multiple default providers for %{name}: %{provider_list}; using %{selected_provider}") %
                       { name: self.name, provider_list:  defaults.collect { |i| i.name.to_s }.join(", "), selected_provider: defaults[0].name })
  end

  @defaultprovider = defaults.shift unless defaults.empty?
end

.is_capability ⇒ Object 


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# File 'lib/puppet/type.rb', line 113

def is_capability
  @is_capability
end

.name ⇒ String (readonly)

Returns the name of the resource type; e.g., “File”


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# File 'lib/puppet/type.rb', line 2281

def name
  @name
end

.properties ⇒ Array<Puppet::Property> (readonly)

The returned lists contains instances if Puppet::Property or its subclasses.


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# File 'lib/puppet/type.rb', line 108

def properties
  @properties
end

.providerloader ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The loader of providers to use when loading providers from disk. Although it looks like this attribute provides a way to operate with different loaders of providers that is not the case; the attribute is written when a new type is created, and should not be changed thereafter.


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# File 'lib/puppet/type.rb', line 1783

def providerloader
  @providerloader
end

.self_refresh ⇒ Boolean

Returns true if the type should send itself a refresh event on change.


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# File 'lib/puppet/type.rb', line 2285

def self_refresh
  @self_refresh
end

Instance Attribute Details

#catalog ⇒ ??? TODO

TODO:

what does this mean “this resource” (sounds like this if for an instance of the type, not the meta Type), but not sure if this is about the catalog where the meta Type is included)

Returns The catalog that this resource is stored in.


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# File 'lib/puppet/type.rb', line 2360

def catalog
  @catalog
end

#exported ⇒ Boolean

Returns Flag indicating if this type is exported


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# File 'lib/puppet/type.rb', line 2363

def exported
  @exported
end

#file ⇒ String

Returns The file from which this type originates from


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# File 'lib/puppet/type.rb', line 2352

def file
  @file
end

#line ⇒ Integer

Returns The line in #file from which this type originates from


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# File 'lib/puppet/type.rb', line 2355

def line
  @line
end

#noop ⇒ Boolean

Returns the `noop` run mode status of this.


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# File 'lib/puppet/type.rb', line 1185

def noop
  noop?
end

#original_parameters ⇒ Hash (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns hash of parameters originally defined


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# File 'lib/puppet/type.rb', line 2388

def original_parameters
  @original_parameters
end

#provider ⇒ Puppet::Provider?

The provider that has been selected for the instance of the resource type.


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# File 'lib/puppet/type.rb', line 1773

def provider
  @provider
end

#title ⇒ String

TODO:

it is somewhat confusing that if the name_var is a valid parameter, it is assumed to be the name_var called :name, but if it is a property, it uses the name_var. It is further confusing as Type in some respects supports multiple namevars.

Returns the title of this object, or its name if title was not explicitly set. If the title is not already set, it will be computed by looking up the #name_var and using that value as the title.

Raises:

  • (??? devfail) —

    if title is not set, and name_var can not be found.


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# File 'lib/puppet/type.rb', line 2652

def title
  unless @title
    if self.class.validparameter?(name_var)
      @title = self[:name]
    elsif self.class.validproperty?(name_var)
      @title = self.should(name_var)
    else
      self.devfail "Could not find namevar #{name_var} for #{self.class.name}"
    end
  end

  @title
end

#virtual ⇒ Boolean

Returns Flag indicating if the type is virtual (it should not be).


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# File 'lib/puppet/type.rb', line 2366

def virtual
  @virtual
end

Class Method Details

.allattrs ⇒ Array<String>

Returns all the attribute names of the type in the appropriate order. The key_attributes come first, then the provider, then the properties, and finally the parameters and metaparams, all in the order they were specified in the respective files.


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# File 'lib/puppet/type.rb', line 136

def self.allattrs
  key_attributes | (parameters & [:provider]) | properties.collect { |property| property.name } | parameters | metaparams
end

.application? ⇒ Boolean

Returns whether this type represents an application instance; since only defined types, i.e., instances of Puppet::Resource::Type can represent application instances, this implementation always returns false. Having this method though makes code checking whether a resource is an application instance simpler


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# File 'lib/puppet/type.rb', line 126

def self.application?
    false
end

.apply_to ⇒ Symbol

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Makes this type apply to `:host` if not already applied to something else.


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# File 'lib/puppet/type.rb', line 264

def self.apply_to
  @apply_to ||= :host
end

.apply_to_all ⇒ Symbol

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Makes this type applicable to `:both` (i.e. `:host` and `:device`).


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# File 'lib/puppet/type.rb', line 257

def self.apply_to_all
  @apply_to = :both
end

.apply_to_device ⇒ Symbol

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Makes this type applicable to `:device`.


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# File 'lib/puppet/type.rb', line 241

def self.apply_to_device
  @apply_to = :device
end

.apply_to_host ⇒ Symbol

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Makes this type applicable to `:host`.


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# File 'lib/puppet/type.rb', line 249

def self.apply_to_host
  @apply_to = :host
end

.attrclass(name) ⇒ Class?

Returns the class associated with the given attribute name.


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# File 'lib/puppet/type.rb', line 144

def self.attrclass(name)
  @attrclasses ||= {}

  # We cache the value, since this method gets called such a huge number
  # of times (as in, hundreds of thousands in a given run).
  unless @attrclasses.include?(name)
    @attrclasses[name] = case self.attrtype(name)
    when :property; @validproperties[name]
    when :meta; @@metaparamhash[name]
    when :param; @paramhash[name]
    end
  end
  @attrclasses[name]
end

.attrtype(attr) ⇒ Symbol

Returns the attribute type (`:property`, `;param`, `:meta`).


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# File 'lib/puppet/type.rb', line 164

def self.attrtype(attr)
  @attrtypes ||= {}
  unless @attrtypes.include?(attr)
    @attrtypes[attr] = case
      when @validproperties.include?(attr); :property
      when @paramhash.include?(attr); :param
      when @@metaparamhash.include?(attr); :meta
      end
  end

  @attrtypes[attr]
end

.autobefore(name, &block) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2102

def self.autobefore(name, &block)
  @autobefores ||= {}
  @autobefores[name] = block
end

.autonotify(name, &block) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2112

def self.autonotify(name, &block)
  @autonotifies ||= {}
  @autonotifies[name] = block
end

.autorequire(name) {| | ... } ⇒ void

This method returns an undefined value.

Adds a block producing a single name (or list of names) of the given resource type name to autorelate.

The four relationship types require, before, notify, and subscribe are all supported.

Be careful with notify and subscribe as they may have unintended consequences.

Resources in the catalog that have the named type and a title that is included in the result will be linked to the calling resource as a requirement.

Examples:

Autorequire the files File['foo', 'bar']

autorequire( 'file', {||

Autobefore the files File['foo', 'bar']

autobefore( 'file', {||

Autosubscribe the files File['foo', 'bar']

autosubscribe( 'file', {||

Autonotify the files File['foo', 'bar']

autonotify( 'file', {||

Yields:

  • ( ) —

    a block returning list of names of given type to auto require

Yield Returns:

  • (String, Array<String>) —

    one or several resource names for the named type


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# File 'lib/puppet/type.rb', line 2097

def self.autorequire(name, &block)
  @autorequires ||= {}
  @autorequires[name] = block
end

.autosubscribe(name, &block) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2107

def self.autosubscribe(name, &block)
  @autosubscribes ||= {}
  @autosubscribes[name] = block
end

.can_apply_to(target) ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns true if this type is applicable to the given target.


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# File 'lib/puppet/type.rb', line 273

def self.can_apply_to(target)
  [ target == :device ? :device : :host, :both ].include?(apply_to)
end

.eachautobefore {|type, block| ... } ⇒ void

This method returns an undefined value.

Provides iteration over added auto-requirements (see autobefore).

Yield Parameters:

  • type (String) —

    the name of the type to autorequire an instance of

  • block (Proc) —

    a block producing one or several dependencies to auto require (see autobefore).

Yield Returns:

  • (void) 

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# File 'lib/puppet/type.rb', line 2134

def self.eachautobefore
  @autobefores ||= {}
  @autobefores.each { |type,block|
    yield(type, block)
  }
end

.eachautonotify {|type, block| ... } ⇒ void

This method returns an undefined value.

Provides iteration over added auto-requirements (see autonotify).

Yield Parameters:

  • type (String) —

    the name of the type to autorequire an instance of

  • block (Proc) —

    a block producing one or several dependencies to auto require (see autonotify).

Yield Returns:

  • (void) 

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# File 'lib/puppet/type.rb', line 2158

def self.eachautonotify
  @autonotifies ||= {}
  @autonotifies.each { |type,block|
    yield(type, block)
  }
end

.eachautorequire {|type, block| ... } ⇒ void

This method returns an undefined value.

Provides iteration over added auto-requirements (see autorequire).

Yield Parameters:

  • type (String) —

    the name of the type to autorequire an instance of

  • block (Proc) —

    a block producing one or several dependencies to auto require (see autorequire).

Yield Returns:

  • (void) 

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# File 'lib/puppet/type.rb', line 2122

def self.eachautorequire
  @autorequires ||= {}
  @autorequires.each { |type, block|
    yield(type, block)
  }
end

.eachautosubscribe {|type, block| ... } ⇒ void

This method returns an undefined value.

Provides iteration over added auto-requirements (see autosubscribe).

Yield Parameters:

  • type (String) —

    the name of the type to autorequire an instance of

  • block (Proc) —

    a block producing one or several dependencies to auto require (see autosubscribe).

Yield Returns:

  • (void) 

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# File 'lib/puppet/type.rb', line 2146

def self.eachautosubscribe
  @autosubscribes ||= {}
  @autosubscribes.each { |type,block|
    yield(type, block)
  }
end

.eachmetaparam {|p| ... } ⇒ void

This method returns an undefined value.

Provides iteration over meta-parameters.

Yield Parameters:


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# File 'lib/puppet/type.rb', line 181

def self.eachmetaparam
  @@metaparams.each { |p| yield p.name }
end

.ensurable ⇒ void .ensurable({|| ... }) ⇒ void

Note:

This method will be automatically called without a block if the type implements the methods specified by ensurable?. It is recommended to always call this method and not rely on this automatic specification to clearly state that the type is ensurable.

This method returns an undefined value.

Creates a new `ensure` property with configured default values or with configuration by an optional block. This method is a convenience method for creating a property `ensure` with default accepted values. If no block is specified, the new `ensure` property will accept the default symbolic values `:present`, and `:absent` - see Property::Ensure. If something else is wanted, pass a block and make calls to Property.newvalue from this block to define each possible value. If a block is passed, the defaults are not automatically added to the set of valid values.

Yields:

  • () —

    A block evaluated in scope of the new Parameter

Yield Returns:

  • (void) 

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# File 'lib/puppet/type.rb', line 205

def self.ensurable(&block)
  if block_given?
    self.newproperty(:ensure, :parent => Puppet::Property::Ensure, &block)
  else
    self.newproperty(:ensure, :parent => Puppet::Property::Ensure) do
      self.defaultvalues
    end
  end
end

.ensurable? ⇒ Boolean

Returns true if the type implements the default behavior expected by being ensurable “by default”. A type is ensurable by default if it responds to `:exists`, `:create`, and `:destroy`. If a type implements these methods and have not already specified that it is ensurable, it will be made so with the defaults specified in ensurable.


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# File 'lib/puppet/type.rb', line 221

def self.ensurable?
  # If the class has all three of these methods defined, then it's
  # ensurable.
  [:exists?, :create, :destroy].all? { |method|
    self.public_method_defined?(method)
  }
end

.handle_param_options(name, options) ⇒ void

This method returns an undefined value.

Processes the options for a named parameter.

Options Hash (options):

  • :boolean (Boolean) —

    if option set to true, an access method on the form name? is added for the param


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# File 'lib/puppet/type.rb', line 283

def self.handle_param_options(name, options)
  # If it's a boolean parameter, create a method to test the value easily
  if options[:boolean]
    define_method(name.to_s + "?") do
      val = self[name]
      if val == :true or val == true
        return true
      end
    end
  end
end

.hash2resource(hash) ⇒ Puppet::Resource

TODO:

as opposed to a complex hash? Other raised exceptions?

Converts a simple hash into a Resource instance.

Raises:


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# File 'lib/puppet/type.rb', line 1238

def self.hash2resource(hash)
  hash = hash.inject({}) { |result, ary| result[ary[0].to_sym] = ary[1]; result }

  title = hash.delete(:title)
  title ||= hash[:name]
  title ||= hash[key_attributes.first] if key_attributes.length == 1

  raise Puppet::Error, "Title or name must be provided" unless title

  # Now create our resource.
  resource = Puppet::Resource.new(self, title)
  resource.catalog = hash.delete(:catalog)

  sensitive = hash.delete(:sensitive_parameters)
  if sensitive
    resource.sensitive_parameters = sensitive
  end

  hash.each do |param, value|
    resource[param] = value
  end
  resource
end

.initvars ⇒ void

TODO:

Does the explanation make sense?

This method returns an undefined value.

Initializes all of the variables that must be initialized for each subclass.


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# File 'lib/puppet/type.rb', line 2296

def self.initvars
  # all of the instances of this class
  @objects = Hash.new
  @aliases = Hash.new

  @defaults = {}

  @parameters ||= []

  @validproperties = {}
  @properties = []
  @parameters = []
  @paramhash = {}

  @paramdoc = Hash.new { |hash,key|
    key = key.intern if key.is_a?(String)
    if hash.include?(key)
      hash[key]
    else
      "Param Documentation for #{key} not found"
    end
  }

  @doc ||= ""

end

.instances ⇒ Object

TODO:

Retrieves them from where? Known to whom?

Retrieves all known instances. Either requires providers or must be overridden.

Raises:

  • (Puppet::DevError) —

    when there are no providers and the implementation has not overridden this method.


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# File 'lib/puppet/type.rb', line 1193

def self.instances
  raise Puppet::DevError, _("%{name} has no providers and has not overridden 'instances'") % { name: self.name } if provider_hash.empty?

  # Put the default provider first, then the rest of the suitable providers.
  provider_instances = {}
  providers_by_source.collect do |provider|
    provider.instances.collect do |instance|
      # We always want to use the "first" provider instance we find, unless the resource
      # is already managed and has a different provider set
      other = provider_instances[instance.name]
      if other
        Puppet.debug "%s %s found in both %s and %s; skipping the %s version" %
          [self.name.to_s.capitalize, instance.name, other.class.name, instance.class.name, instance.class.name]
        next
      end
      provider_instances[instance.name] = instance

      result = new(:name => instance.name, :provider => instance)
      properties.each { |name| result.newattr(name) }
      result
    end
  end.flatten.compact
end

.is_capability? ⇒ Boolean 


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# File 'lib/puppet/type.rb', line 115

def is_capability?
  c = is_capability
  c.nil? ? false : c
end

.isomorphic? ⇒ Boolean

Returns true if the type's notion of name is the identity of a resource. See the overview of this class for a longer explanation of the concept isomorphism. Defaults to true.


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# File 'lib/puppet/type.rb', line 929

def self.isomorphic?
  if defined?(@isomorphic)
    return @isomorphic
  else
    return true
  end
end

.key_attribute_parameters ⇒ Array<Puppet::Parameter>

Returns the list of parameters that comprise the composite key / “uniqueness key”. All parameters that return true from #isnamevar? or is named `:name` are included in the returned result.

See Also:


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# File 'lib/puppet/type.rb', line 376

def self.key_attribute_parameters
  @key_attribute_parameters ||= (
    @parameters.find_all { |param|
      param.isnamevar? or param.name == :name
    }
  )
end

.key_attributes ⇒ Array<String>

Returns cached key_attribute_parameters names. Key attributes are properties and parameters that comprise a composite key or “uniqueness key”.


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# File 'lib/puppet/type.rb', line 389

def self.key_attributes
  # This is a cache miss around 0.05 percent of the time. --daniel 2012-07-17
  @key_attributes_cache ||= key_attribute_parameters.collect { |p| p.name }
end

.metaparam?(param) ⇒ Boolean

Is the given parameter a meta-parameter?


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# File 'lib/puppet/type.rb', line 298

def self.metaparam?(param)
  @@metaparamhash.include?(param.intern)
end

.metaparamclass(name) ⇒ Class?

Returns the meta-parameter class associated with the given meta-parameter name. Accepts a `nil` name, and return nil.


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# File 'lib/puppet/type.rb', line 308

def self.metaparamclass(name)
  return nil if name.nil?
  @@metaparamhash[name.intern]
end

.metaparamdoc(metaparam) ⇒ String

Returns the documentation for a given meta-parameter of this type.

Raises:

  • if the given metaparam is not a meta-parameter in this type


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# File 'lib/puppet/type.rb', line 326

def self.metaparamdoc(metaparam)
  @@metaparamhash[metaparam].doc
end

.metaparams ⇒ Array<String>

Returns all meta-parameter names.


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# File 'lib/puppet/type.rb', line 316

def self.metaparams
  @@metaparams.collect { |param| param.name }
end

.needs_ensure_retrieved ⇒ Object

Says if the ensure property should be retrieved if the resource is ensurable Defaults to true. Some resource type classes can override it


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# File 'lib/puppet/type.rb', line 1081

def self.needs_ensure_retrieved
  true
end

.newmetaparam(name, options = {}) {|| ... } ⇒ Class<inherits Puppet::Parameter>

TODO:

Verify that this description is ok

Creates a new meta-parameter. This creates a new meta-parameter that is added to this and all inheriting types.

Options Hash (options):

  • :parent (Class<inherits Puppet::Parameter>) — default: Puppet::Parameter —

    the super class of this parameter

  • :attributes (Hash{String => Object}) —

    a hash that is applied to the generated class by calling setter methods corresponding to this hash's keys/value pairs. This is done before the given block is evaluated.

  • :boolean (Boolean) — default: false —

    specifies if this is a boolean parameter

  • :namevar (Boolean) — default: false —

    specifies if this parameter is the namevar

  • :required_features (Symbol, Array<Symbol>) —

    specifies required provider features by name

Yields:

  • () —

    a required block that is evaluated in the scope of the new meta-parameter


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# File 'lib/puppet/type.rb', line 347

def self.newmetaparam(name, options = {}, &block)
  @@metaparams ||= []
  @@metaparamhash ||= {}
  name = name.intern

  param = genclass(
    name,
    :parent => options[:parent] || Puppet::Parameter,
    :prefix => "MetaParam",
    :hash => @@metaparamhash,
    :array => @@metaparams,
    :attributes => options[:attributes],
    &block
  )

  # Grr.
  param.required_features = options[:required_features] if options[:required_features]

  handle_param_options(name, options)

  param.metaparam = true

  param
end

.newparam(name, options = {}) {|| ... } ⇒ Class<inherits Puppet::Parameter>

Creates a new parameter.

Options Hash (options):

  • :parent (Class<inherits Puppet::Parameter>) — default: Puppet::Parameter —

    the super class of this parameter

  • :attributes (Hash{String => Object}) —

    a hash that is applied to the generated class by calling setter methods corresponding to this hash's keys/value pairs. This is done before the given block is evaluated.

  • :boolean (Boolean) — default: false —

    specifies if this is a boolean parameter

  • :namevar (Boolean) — default: false —

    specifies if this parameter is the namevar

  • :required_features (Symbol, Array<Symbol>) —

    specifies required provider features by name

Yields:

  • () —

    a required block that is evaluated in the scope of the new parameter


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# File 'lib/puppet/type.rb', line 462

def self.newparam(name, options = {}, &block)
  options[:attributes] ||= {}

  param = genclass(
    name,
    :parent     => options[:parent] || Puppet::Parameter,
    :attributes => options[:attributes],
    :block      => block,
    :prefix     => "Parameter",
    :array      => @parameters,
    :hash       => @paramhash
  )

  handle_param_options(name, options)

  # Grr.
  param.required_features = options[:required_features] if options[:required_features]

  param.isnamevar if options[:namevar]

  param
end

.newproperty(name, options = {}) {|| ... } ⇒ Class<inherits Puppet::Property>

Creates a new property.

Options Hash (options):

  • :array_matching (Symbol) — default: :first —

    specifies how the current state is matched against the wanted state. Use `:first` if the property is single valued, and (`:all`) otherwise.

  • :parent (Class<inherits Puppet::Property>) — default: Puppet::Property —

    the super class of this property

  • :attributes (Hash{String => Object}) —

    a hash that is applied to the generated class by calling setter methods corresponding to this hash's keys/value pairs. This is done before the given block is evaluated.

  • :boolean (Boolean) — default: false —

    specifies if this is a boolean parameter

  • :retrieve (Symbol) —

    the method to call on the provider (or `parent` if `provider` is not set) to retrieve the current value of this property.

  • :required_features (Symbol, Array<Symbol>) —

    specifies required provider features by name

Yields:

  • () —

    a required block that is evaluated in the scope of the new property

Raises:


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# File 'lib/puppet/type.rb', line 503

def self.newproperty(name, options = {}, &block)
  name = name.intern

  # This is here for types that might still have the old method of defining
  # a parent class.
  unless options.is_a? Hash
    raise Puppet::DevError, _("Options must be a hash, not %{type}") % { type: options.inspect }
  end

  raise Puppet::DevError, _("Class %{class_name} already has a property named %{property}") % { class_name: self.name, property: name } if @validproperties.include?(name)

  parent = options[:parent]
  if parent
    options.delete(:parent)
  else
    parent = Puppet::Property
  end

  # We have to create our own, new block here because we want to define
  # an initial :retrieve method, if told to, and then eval the passed
  # block if available.
  prop = genclass(name, :parent => parent, :hash => @validproperties, :attributes => options) do
    # If they've passed a retrieve method, then override the retrieve
    # method on the class.
    if options[:retrieve]
      define_method(:retrieve) do
        provider.send(options[:retrieve])
      end
    end

    class_eval(&block) if block
  end

  # If it's the 'ensure' property, always put it first.
  if name == :ensure
    @properties.unshift prop
  else
    @properties << prop
  end

  prop
end

.paramclass(name) ⇒ Puppet::Parameter

Returns the parameter class associated with the given parameter name.


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# File 'lib/puppet/type.rb', line 557

def self.paramclass(name)
  @paramhash[name]
end

.paramdoc(param) ⇒ Object 


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# File 'lib/puppet/type.rb', line 546

def self.paramdoc(param)
  @paramhash[param].doc
end

.parameters ⇒ Array<String>

Returns the parameter names


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# File 'lib/puppet/type.rb', line 551

def self.parameters
  return [] unless defined?(@parameters)
  @parameters.collect { |klass| klass.name }
end

.parameters_to_include ⇒ Array<Symbol>

Returns any parameters that should be included by default in puppet resource's output


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# File 'lib/puppet/type.rb', line 396

def self.parameters_to_include
  []
end

.propertybyname(name) ⇒ Puppet::Property

Returns the property class ??? associated with the given property name


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# File 'lib/puppet/type.rb', line 562

def self.propertybyname(name)
  @validproperties[name]
end

.provide(name, options = {}, &block) ⇒ Puppet::Provider

TODO:

Fix Confusing Explanations! Is this a new provider of a Type (metatype), or a provider of an instance of Type (a resource), or a Provider (the implementation of a Type's behavior). CONFUSED. It calls magically named methods like “providify” …

Creates a new provider of a type. This method must be called directly on the type that it's implementing.

Options Hash (options):

  • :parent (Puppet::Provider) —

    the parent provider (what is this?)

  • :resource_type (Puppet::Type) —

    the resource type, defaults to this type if unspecified

Raises:


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# File 'lib/puppet/type.rb', line 1881

def self.provide(name, options = {}, &block)
  name = name.intern

  if unprovide(name)
    Puppet.debug "Reloading #{name} #{self.name} provider"
  end

  pname = options[:parent]
  parent = if pname
    options.delete(:parent)
    if pname.is_a? Class
      pname
    else
      provider = self.provider(pname)
      if provider
        provider
      else
        raise Puppet::DevError, _("Could not find parent provider %{parent} of %{name}") % { parent: pname, name: name }
      end
    end
  else
    Puppet::Provider
  end

  options[:resource_type] ||= self

  self.providify

  provider = genclass(
    name,
    :parent     => parent,
    :hash       => provider_hash,
    :prefix     => "Provider",
    :block      => block,
    :include    => feature_module,
    :extend     => feature_module,
    :attributes => options
  )

  provider
end

.provider(name) ⇒ Puppet::Provider?

Returns the provider having the given name. This will load a provider if it is not already loaded. The returned provider is the first found provider having the given name, where “first found” semantics is defined by the providerloader in use.


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# File 'lib/puppet/type.rb', line 1838

def self.provider(name)
  name = name.intern

  # If we don't have it yet, try loading it.
  @providerloader.load(name, Puppet.lookup(:current_environment)) unless provider_hash.has_key?(name)
  provider_hash[name]
end

.provider_hash ⇒ Hash{ ??? => Puppet::Provider}

Returns a hash of WHAT EXACTLY for this type.

See Also:


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# File 'lib/puppet/type.rb', line 1827

def self.provider_hash
  Puppet::Type.provider_hash_by_type(self.name)
end

.provider_hash_by_type(type) ⇒ Hash{??? => Puppet::Provider}

TODO:

what goes into this hash?

Returns a hash of WHAT EXACTLY for the given type


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# File 'lib/puppet/type.rb', line 1820

def self.provider_hash_by_type(type)
  @provider_hashes ||= {}
  @provider_hashes[type] ||= {}
end

.providers ⇒ Array<String>

Returns a list of loaded providers by name. This method will not load/search for available providers.


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# File 'lib/puppet/type.rb', line 1850

def self.providers
  provider_hash.keys
end

.providers_by_source ⇒ Array<Puppet::Provider>

TODO:

Needs better explanation; what does “source” mean in this context?

Returns a list of one suitable provider per source, with the default provider first.


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# File 'lib/puppet/type.rb', line 1221

def self.providers_by_source
  # Put the default provider first (can be nil), then the rest of the suitable providers.
  sources = []
  [defaultprovider, suitableprovider].flatten.uniq.collect do |provider|
    next if provider.nil?
    next if sources.include?(provider.source)

    sources << provider.source
    provider
  end.compact
end

.providify ⇒ void

This method returns an undefined value.

Ensures there is a `:provider` parameter defined. Should only be called if there are providers.


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# File 'lib/puppet/type.rb', line 1926

def self.providify
  return if @paramhash.has_key? :provider

  param = newparam(:provider) do
    # We're using a hacky way to get the name of our type, since there doesn't
    # seem to be a correct way to introspect this at the time this code is run.
    # We expect that the class in which this code is executed will be something
    # like Puppet::Type::Ssh_authorized_key::ParameterProvider.
    desc "The specific backend to use for this `\#{self.to_s.split('::')[2].downcase}`\nresource. You will seldom need to specify this --- Puppet will usually\ndiscover the appropriate provider for your platform.\n"

    # This is so we can refer back to the type to get a list of
    # providers for documentation.
    class << self
      # The reference to a parent type for the parameter `:provider` used to get a list of
      # providers for documentation purposes.
      #
      attr_accessor :parenttype
    end

    # Provides the ability to add documentation to a provider.
    #
    def self.doc
      # Since we're mixing @doc with text from other sources, we must normalize
      # its indentation with scrub. But we don't need to manually scrub the
      # provider's doc string, since markdown_definitionlist sanitizes its inputs.
      scrub(@doc) + "Available providers are:\n\n" + parenttype.providers.sort_by(&:to_s).collect { |i|
        markdown_definitionlist( i, scrub(parenttype().provider(i).doc) )
      }.join
    end

    # For each resource, the provider param defaults to
    # the type's default provider
    defaultto {
      prov = @resource.class.defaultprovider
      prov.name if prov
    }

    validate do |provider_class|
      provider_class = provider_class[0] if provider_class.is_a? Array
      provider_class = provider_class.class.name if provider_class.is_a?(Puppet::Provider)

      unless @resource.class.provider(provider_class)
        raise ArgumentError, _("Invalid %{resource} provider '%{provider_class}'") % { resource: @resource.class.name, provider_class: provider_class}
      end
    end

    munge do |provider|
      provider = provider[0] if provider.is_a? Array
      provider = provider.intern if provider.is_a? String
      @resource.provider = provider

      if provider.is_a?(Puppet::Provider)
        provider.class.name
      else
        provider
      end
    end
  end
  param.parenttype = self
end

.relationship_params ⇒ Object

TODO:

document this, have no clue what this does… it returns “RelationshipMetaparam.subclasses”


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# File 'lib/puppet/type.rb', line 1610

def self.relationship_params
  RelationshipMetaparam.subclasses
end

.suitableprovider ⇒ Array<Puppet::Provider>

Note:

This method also does some special processing which rejects a provider named `:fake` (for testing purposes).

Returns a list of suitable providers for the given type. A call to this method will load all providers if not already loaded and ask each if it is suitable - those that are are included in the result.


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# File 'lib/puppet/type.rb', line 2008

def self.suitableprovider
  providerloader.loadall(Puppet.lookup(:current_environment)) if provider_hash.empty?
  provider_hash.find_all { |name, provider|
    provider.suitable?
  }.collect { |name, provider|
    provider
  }.reject { |p| p.name == :fake } # For testing
end

.title_patterns ⇒ Array<Array<Regexp, Array<Array <Symbol, Proc>>>>?

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Note:

Advanced: some logic requires this mapping to be done differently, using a different validation/pattern, breaking up the title into several parts assigning each to an individual attribute, or even use a composite identity where all namevars are seen as part of the unique identity (such computation is done by the #uniqueness method. These advanced options are rarely used (only one of the built in puppet types use this, and then only a small part of the available functionality), and the support for these advanced mappings is not implemented in a straight forward way. For these reasons, this method has been marked as private).

Returns a mapping from the title string to setting of attribute values. This default implementation provides a mapping of title to the one and only namevar present in the type's definition.

Raises:

  • (Puppet::DevError) —

    if there is no title pattern and there are two or more key attributes


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# File 'lib/puppet/type.rb', line 428

def self.title_patterns
  case key_attributes.length
  when 0; []
  when 1;
    [ [ /(.*)/m, [ [key_attributes.first] ] ] ]
  else
    raise Puppet::DevError, _("you must specify title patterns when there are two or more key attributes")
  end
end

.to_s ⇒ String

Returns the name of this type (if specified) or the parent type #to_s. The returned name is on the form “Puppet::Type::<name>”, where the first letter of name is capitalized.


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# File 'lib/puppet/type.rb', line 2328

def self.to_s
  if defined?(@name)
    "Puppet::Type::#{@name.to_s.capitalize}"
  else
    super
  end
end

.unprovide(name) ⇒ Object

TODO:

this needs a better explanation

Removes the implementation class of a given provider.


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# File 'lib/puppet/type.rb', line 1994

def self.unprovide(name)
  if @defaultprovider and @defaultprovider.name == name
    @defaultprovider = nil
  end

  rmclass(name, :hash => provider_hash, :prefix => "Provider")
end

.valid_parameter?(name) ⇒ Boolean

Note:

see comment in code - how should this be documented? Are some of the other query methods deprecated? (or should be).

Returns whether or not the given name is the name of a property, parameter or meta-parameter


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# File 'lib/puppet/type.rb', line 607

def self.valid_parameter?(name)
  validattr?(name)
end

.validate {|| ... } ⇒ void

This method returns an undefined value.

Creates a `validate` method that is used to validate a resource before it is operated on. The validation should raise exceptions if the validation finds errors. (It is not recommended to issue warnings as this typically just ends up in a logfile - you should fail if a validation fails). The easiest way to raise an appropriate exception is to call the method Util::Errors.fail with the message as an argument.

Yields:

  • () —

    a required block called with self set to the instance of a Type class representing a resource.


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# File 'lib/puppet/type.rb', line 2347

def self.validate(&block)
  define_method(:validate, &block)
end

.validattr?(name) ⇒ Boolean

Returns whether or not the given name is the name of a property, parameter or meta-parameter


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# File 'lib/puppet/type.rb', line 569

def self.validattr?(name)
  name = name.intern
  return true if name == :name
  @validattrs ||= {}

  unless @validattrs.include?(name)
    @validattrs[name] = !!(self.validproperty?(name) or self.validparameter?(name) or self.metaparam?(name))
  end

  @validattrs[name]
end

.validparameter?(name) ⇒ Boolean

Returns true if the given name is the name of an existing parameter

Raises:


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# File 'lib/puppet/type.rb', line 598

def self.validparameter?(name)
  raise Puppet::DevError, _("Class %{class_name} has not defined parameters") % { class_name: self } unless defined?(@parameters)
  !!(@paramhash.include?(name) or @@metaparamhash.include?(name))
end

.validproperties ⇒ Array<Symbol>, {}

TODO:

An empty hash is returned if there are no defined parameters (not an empty array). This looks like a bug.

Returns a list of valid property names, or an empty hash if there are none.


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# File 'lib/puppet/type.rb', line 591

def self.validproperties
  return {} unless defined?(@parameters)

  @validproperties.keys
end

.validproperty?(name) ⇒ Boolean

Returns true if the given name is the name of an existing property


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# File 'lib/puppet/type.rb', line 582

def self.validproperty?(name)
  name = name.intern
  @validproperties.include?(name) && @validproperties[name]
end

.validprovider?(name) ⇒ Boolean

TODO:

How does the provider know if it is suitable for the type? Is it just suitable for the platform/ environment where this method is executing?

Returns true if the given name is a reference to a provider and if this is a suitable provider for this type.


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# File 'lib/puppet/type.rb', line 1861

def self.validprovider?(name)
  name = name.intern

  (provider_hash.has_key?(name) && provider_hash[name].suitable?)
end

Instance Method Details

#<=>(other) ⇒ -1, ...

Compares this type against the given other (type) and returns -1, 0, or +1 depending on the order.

See Also:

  • Comparable

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# File 'lib/puppet/type.rb', line 93

def <=>(other)
  # Order is only maintained against other types, not arbitrary objects.
  # The natural order is based on the reference name used when comparing
  return nil unless other.is_a?(Puppet::CompilableResourceType) || other.class.is_a?(Puppet::CompilableResourceType)
  # against other type instances.
  self.ref <=> other.ref
end

#[](name) ⇒ Object

Gets the 'should' (wanted state) value of a parameter or property by name. To explicitly get the 'is' (current state) value use `o.is(:name)`, and to explicitly get the 'should' value use `o.should(:name)`


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# File 'lib/puppet/type.rb', line 644

def [](name)
  name = name.intern
  fail("Invalid parameter #{name}(#{name.inspect})") unless self.class.validattr?(name)

  if name == :name
    nv = name_var
    name = nv if nv
  end

  obj = @parameters[name]
  if obj
    # Note that if this is a property, then the value is the "should" value,
    # not the current value.
    obj.value
  else
    return nil
  end
end

#[]=(name, value) ⇒ Object

Sets the 'should' (wanted state) value of a property, or the value of a parameter.

Raises:

  • (Puppet::Error) —

    if the setting of the value fails, or if the given name is nil.

  • (Puppet::ResourceError) —

    when the parameter validation raises Puppet::Error or ArgumentError


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# File 'lib/puppet/type.rb', line 668

def []=(name,value)
  name = name.intern

  fail("no parameter named '#{name}'") unless self.class.validattr?(name)

  if name == :name
    nv = name_var
    name = nv if nv
  end
  raise Puppet::Error.new("Got nil value for #{name}") if value.nil?

  property = self.newattr(name)

  if property
    begin
      # make sure the parameter doesn't have any errors
      property.value = value
    rescue Puppet::Error, ArgumentError => detail
      error = Puppet::ResourceError.new(_("Parameter %{name} failed on %{ref}: %{detail}") %
                                            { name: name, ref: ref, detail: detail })
      adderrorcontext(error, detail)
      raise error
    end
  end

  nil
end

#add_property_parameter(prop_name) ⇒ Boolean

Creates a new property value holder for the resource if it is valid and does not already exist


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# File 'lib/puppet/type.rb', line 618

def add_property_parameter(prop_name)
  if self.class.validproperty?(prop_name) && !@parameters[prop_name]
    self.newattr(prop_name)
    return true
  end
  false
end

#ancestors ⇒ Array<???>

TODO:

WHAT IS THIS ?

Returns the ancestors - WHAT? This implementation always returns an empty list.


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# File 'lib/puppet/type.rb', line 1008

def ancestors
  []
end

#appliable_to_device? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns true if a resource of this type can be evaluated on a 'network device' kind of hosts.


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# File 'lib/puppet/type.rb', line 2701

def appliable_to_device?
  self.class.can_apply_to(:device)
end

#appliable_to_host? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns true if a resource of this type can be evaluated on a regular generalized computer (ie not an appliance like a network device)


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# File 'lib/puppet/type.rb', line 2708

def appliable_to_host?
  self.class.can_apply_to(:host)
end

#autobefore(rel_catalog = nil) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2215

def autobefore(rel_catalog = nil)
  autorelation(:before, rel_catalog)
end

#autonotify(rel_catalog = nil) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2223

def autonotify(rel_catalog = nil)
  autorelation(:notify, rel_catalog)
end

#autorelation(rel_type, rel_catalog = nil) ⇒ Object

TODO:

needs details - see the param rel_catalog, and type of this param

Adds dependencies to the catalog from added autorelations. See autorequire for how to add an auto-requirement.

Raises:


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# File 'lib/puppet/type.rb', line 2173

def autorelation(rel_type, rel_catalog = nil)
  rel_catalog ||= catalog
  raise Puppet::DevError, _("You cannot add relationships without a catalog") unless rel_catalog

  reqs = []

  auto_rel = "eachauto#{rel_type}".to_sym

  self.class.send(auto_rel) { |type, block|
    # Ignore any types we can't find, although that would be a bit odd.
    next unless Puppet::Type.type(type)

    # Retrieve the list of names from the block.
    list = self.instance_eval(&block)
    next unless list
    list = [list] unless list.is_a?(Array)

    # Collect the current prereqs
    list.each { |dep|
      next if dep.nil?

      # Support them passing objects directly, to save some effort.
      unless dep.is_a?(Puppet::Type)
        # Skip autorelation that we aren't managing
        dep = rel_catalog.resource(type, dep)
        next unless dep
      end

      if [:require, :subscribe].include?(rel_type)
        reqs << Puppet::Relationship.new(dep, self)
      else
        reqs << Puppet::Relationship.new(self, dep)
      end
    }
  }
  reqs
end

#autorequire(rel_catalog = nil) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2211

def autorequire(rel_catalog = nil)
  autorelation(:require, rel_catalog)
end

#autosubscribe(rel_catalog = nil) ⇒ Object 


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# File 'lib/puppet/type.rb', line 2219

def autosubscribe(rel_catalog = nil)
  autorelation(:subscribe, rel_catalog)
end

#builddepends ⇒ Array<Puppet::Relationship>

Builds the dependencies associated with this resource.


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# File 'lib/puppet/type.rb', line 2230

def builddepends
  # Handle the requires
  self.class.relationship_params.collect do |klass|
    param = @parameters[klass.name]
    param.to_edges if param
  end.flatten.reject { |r| r.nil? }
end

#currentpropvalues ⇒ Hash{Puppet::Property => Object}

Returns a hash of the current properties and their values. If a resource is absent, its value is the symbol `:absent`


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# File 'lib/puppet/type.rb', line 1149

def currentpropvalues
  # It's important to use the 'properties' method here, as it follows the order
  # in which they're defined in the class.  It also guarantees that 'ensure'
  # is the first property, which is important for skipping 'retrieve' on
  # all the properties if the resource is absent.
  ensure_state = false
  return properties.inject({}) do | prophash, property|
    if property.name == :ensure
      ensure_state = property.retrieve
      prophash[property] = ensure_state
    else
      if ensure_state == :absent
        prophash[property] = :absent
      else
        prophash[property] = property.retrieve
      end
    end
    prophash
  end
end

#delete(attr) ⇒ Object

TODO:

Don't know what the attr is (name or Property/Parameter?). Guessing it is a String name…

TODO:

Is it possible to delete a meta-parameter?

TODO:

What does delete mean? Is it deleted from the type or is its value state 'is'/'should' deleted?

Removes an attribute from the object; useful in testing or in cleanup when an error has been encountered

Raises:

  • (Puppet::DecError) —

    when an attempt is made to delete an attribute that does not exists.


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# File 'lib/puppet/type.rb', line 704

def delete(attr)
  attr = attr.intern
  if @parameters.has_key?(attr)
    @parameters.delete(attr)
  else
    raise Puppet::DevError.new(_("Undefined attribute '%{attribute}' in %{name}") % { attribute: attr, name: self})
  end
end

#deleting? ⇒ Boolean

Returns true if the wanted state of the resource is that it should be absent (i.e. to be deleted).


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# File 'lib/puppet/type.rb', line 612

def deleting?
  obj = @parameters[:ensure] and obj.should == :absent
end

#depthfirst? ⇒ Boolean

TODO:

What is this used for?

Returns true if the search should be done in depth-first order. This implementation always returns false.


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# File 'lib/puppet/type.rb', line 977

def depthfirst?
  false
end

#eachparameter {|parameter| ... } ⇒ void

This method returns an undefined value.

Iterates over all parameters with value currently set.

Yield Parameters:


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# File 'lib/puppet/type.rb', line 733

def eachparameter
  parameters_with_value.each { |parameter| yield parameter }
end

#eachproperty {|property| ... } ⇒ void

This method returns an undefined value.

Iterates over the properties that were set on this resource.

Yield Parameters:


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# File 'lib/puppet/type.rb', line 716

def eachproperty
  # properties is a private method
  properties.each { |property|
    yield property
  }
end

#event(options = {}) ⇒ Puppet::Transaction::Event

TODO:

Needs a better explanation “Why should I care who is calling this method?”, What do I need to know about events and how they work? Where can I read about them?

Creates a transaction event. Called by Transaction or by a property. Merges the given options with the options `:resource`, `:file`, `:line`, and `:tags`, initialized from values in this object. For possible options to pass (if any ????) see Puppet::Transaction::Event.


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# File 'lib/puppet/type.rb', line 745

def event(options = {})
  Puppet::Transaction::Event.new({:resource => self, :file => file, :line => line, :tags => tags}.merge(options))
end

#exported? ⇒ Boolean

Returns whether the resource is exported or not


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# File 'lib/puppet/type.rb', line 2695

def exported?; !!@exported; end

#finish ⇒ Array<Puppet::Parameter>

TODO:

what is the expected sequence here - who is responsible for calling this? When? Is the returned type correct?

Finishes any outstanding processing. This method should be called as a final step in setup, to allow the parameters that have associated auto-require needs to be processed.


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# File 'lib/puppet/type.rb', line 2562

def finish
  # Call post_compile hook on every parameter that implements it. This includes all subclasses
  # of parameter including, but not limited to, regular parameters, metaparameters, relationship
  # parameters, and properties.
  eachparameter do |parameter|
    parameter.post_compile if parameter.respond_to? :post_compile
  end

  # Make sure all of our relationships are valid.  Again, must be done
  # when the entire catalog is instantiated.
  self.class.relationship_params.collect do |klass|
    param = @parameters[klass.name]
    param.validate_relationship if param
  end.flatten.reject { |r| r.nil? }
end

#flush ⇒ ????

TODO:

What does Flushing the provider mean? Why is it interesting to know that this is called by the transaction? (It is not explained anywhere what a transaction is).

Flushes the provider if supported by the provider, else no action. This is called by the transaction.


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# File 'lib/puppet/type.rb', line 1034

def flush
  self.provider.flush if self.provider and self.provider.respond_to?(:flush)
end

#insync?(is) ⇒ Boolean

TODO:

“contained in what?” in the given “in” parameter?

TODO:

deal with the comment _“FIXME I don't think this is used on the type instances any more, it's really only used for testing”_

Returns true if all contained objects are in sync.


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# File 'lib/puppet/type.rb', line 1045

def insync?(is)
  insync = true

  property = @parameters[:ensure]
  if property
    unless is.include? property
      #TRANSLATORS 'is' is a variable name and should not be translated
      raise Puppet::DevError, _("The 'is' value is not in the 'is' array for '%{name}'") % { name: property.name }
    end
    ensureis = is[property]
    if property.safe_insync?(ensureis) and property.should == :absent
      return true
    end
  end

  properties.each { |prop|
    unless is.include? prop
      #TRANSLATORS 'is' is a variable name and should not be translated
      raise Puppet::DevError, _("The 'is' value is not in the 'is' array for '%{name}'") % { name: prop.name }
    end

    propis = is[prop]
    unless prop.safe_insync?(propis)
      prop.debug("Not in sync: #{propis.inspect} vs #{prop.should.inspect}")
      insync = false
    #else
    #    property.debug("In sync")
    end
  }

  #self.debug("#{self} sync status is #{insync}")
  insync
end

#isomorphic? ⇒ Boolean

TODO:

check that this gets documentation (it is at the class level as well as instance).

(see isomorphic?)


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# File 'lib/puppet/type.rb', line 939

def isomorphic?
  self.class.isomorphic?
end

#log(msg) ⇒ void

This method returns an undefined value.

Creates a log entry with the given message at the log level specified by the parameter `loglevel`


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# File 'lib/puppet/type.rb', line 2371

def log(msg)

  Puppet::Util::Log.create(

    :level => @parameters[:loglevel].value,
    :message => msg,

    :source => self
  )
end

#managed? ⇒ Boolean

Note:

An object that is managed always stays managed, but an object that is not managed may become managed later in its lifecycle.

Returns true if the instance is a managed instance. A 'yes' here means that the instance was created from the language, vs. being created in order resolve other questions, such as finding a package in a list.


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# File 'lib/puppet/type.rb', line 949

def managed?
  # Once an object is managed, it always stays managed; but an object
  # that is listed as unmanaged might become managed later in the process,
  # so we have to check that every time
  if @managed
    return @managed
  else
    @managed = false
    properties.each { |property|
      s = property.should
      if s and ! property.class.unmanaged
        @managed = true
        break
      end
    }
    return @managed
  end
end

#name ⇒ String

TODO:

There is a comment in source that this is not quite the same as ':title' and that a switch should be made…

Returns the resource's name


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# File 'lib/puppet/type.rb', line 2584

def name
  self[:name]
end

#name_var ⇒ Symbol, Boolean

Returns the name of the namevar if there is only one or false otherwise.


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# File 'lib/puppet/type.rb', line 633

def name_var
  return @name_var_cache unless @name_var_cache.nil?
  key_attributes = self.class.key_attributes
  @name_var_cache = (key_attributes.length == 1) && key_attributes.first
end

#newattr(name) ⇒ Object #newattr(klass) ⇒ Object

Registers an attribute to this resource type instance. Requires either the attribute name or class as its argument. This is a noop if the named property/parameter is not supported by this resource. Otherwise, an attribute instance is created and kept in this resource's parameters hash.


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# File 'lib/puppet/type.rb', line 773

def newattr(name)
  if name.is_a?(Class)
    klass = name
    name = klass.name
  end

  klass = self.class.attrclass(name)
  unless klass
    raise Puppet::Error, "Resource type #{self.class.name} does not support parameter #{name}"
  end

  if provider and ! provider.class.supports_parameter?(klass)
    missing = klass.required_features.find_all { |f| ! provider.class.feature?(f) }
    debug "Provider %s does not support features %s; not managing attribute %s" % [provider.class.name, missing.join(", "), name]
    return nil
  end

  return @parameters[name] if @parameters.include?(name)

  @parameters[name] = klass.new(:resource => self)
end

#noop? ⇒ Boolean

Returns the `noop` run mode status of this.


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# File 'lib/puppet/type.rb', line 1172

def noop?
  # If we're not a host_config, we're almost certainly part of
  # Settings, and we want to ignore 'noop'
  return false if catalog and ! catalog.host_config?

  if defined?(@noop)
    @noop
  else
    Puppet[:noop]
  end
end

#parameter(name) ⇒ Object

Returns the value of this object's parameter given by name


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# File 'lib/puppet/type.rb', line 805

def parameter(name)
  @parameters[name.to_sym]
end

#parameters ⇒ Hash{String => Object}

Returns a shallow copy of this object's hash of attributes by name. Note that his not only comprises parameters, but also properties and metaparameters. Changes to the contained parameters will have an effect on the parameters of this type, but changes to the returned hash does not.


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# File 'lib/puppet/type.rb', line 814

def parameters
  @parameters.dup
end

#parameters_with_value ⇒ Array<Puppet::Parameter>

Return the parameters, metaparams, and properties that have a value or were set by a default. Properties are included since they are a subclass of parameter.


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# File 'lib/puppet/type.rb', line 726

def parameters_with_value
  self.class.allattrs.collect { |attr| parameter(attr) }.compact
end

#parent ⇒ Puppet::Type?

Returns the parent of this in the catalog. In case of an erroneous catalog where multiple parents have been produced, the first found (non deterministic) parent is returned.


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# File 'lib/puppet/type.rb', line 2594

def parent
  return nil unless catalog
  return @parent if @parent
  parents = catalog.adjacent(self, :direction => :in)
  @parent = if parents
    parents.shift
  else
    nil
  end
end

#path ⇒ String

Returns a string representation of the resource's containment path in the catalog.


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# File 'lib/puppet/type.rb', line 798

def path
  @path ||= '/' + pathbuilder.join('/')
end

#pathbuilder ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns an array of strings representing the containment hierarchy (types/classes) that make up the path to the resource from the root of the catalog. This is mostly used for logging purposes.


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# File 'lib/puppet/type.rb', line 1268

def pathbuilder
  p = parent
  if p
    [p.pathbuilder, self.ref].flatten
  else
    [self.ref]
  end
end

#pre_run_check ⇒ void

This method is abstract.

a resource type may implement this method to perform validation checks that can query the complete catalog

This method returns an undefined value.

Lifecycle method for a resource. This is called during graph creation. It should perform any consistency checking of the catalog and raise a Puppet::Error if the transaction should be aborted.

It differs from the validate method, since it is called later during initialization and can rely on self.catalog to have references to all resources that comprise the catalog.

Raises:

See Also:

  • Puppet::Transaction#add_vertex

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# File 'lib/puppet/type.rb', line 1025

def pre_run_check
end

#present?(current_values) ⇒ Boolean

Given the hash of current properties, should this resource be treated as if it currently exists on the system. May need to be overridden by types that offer up more than just :absent and :present.


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# File 'lib/puppet/type.rb', line 1141

def present?(current_values)
  current_values[:ensure] != :absent
end

#properties ⇒ Array<Puppet::Property>

TODO:

“what does the 'order specified in the class' mean? The order the properties where added in the ruby file adding a new type with new properties?

Returns all of the property objects, in the order specified in the class.


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# File 'lib/puppet/type.rb', line 920

def properties
  self.class.properties.collect { |prop| @parameters[prop.name] }.compact
end

#property(name) ⇒ Puppet::Property

TODO:

LAK:NOTE(20081028) Since the 'parameter' method is now a superset of this method, this one should probably go away at some point. - Does this mean it should be deprecated ?

Returns a Property instance by name. To return the value, use 'resource'


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# File 'lib/puppet/type.rb', line 830

def property(name)
  obj = @parameters[name.intern]
  if obj && obj.is_a?(Puppet::Property)
    obj
  else
    nil
  end
end

#propertydefined?(name) ⇒ Boolean

Returns whether the attribute given by name has been added to this resource or not.


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# File 'lib/puppet/type.rb', line 820

def propertydefined?(name)
  name = name.intern unless name.is_a? Symbol
  @parameters.include?(name)
end

#purging ⇒ Object

TODO:

what does this mean; “mark that we are purging” (purging what from where). How to use/when? Is this internal API in transactions?

Marks the object as “being purged”. This method is used by transactions to forbid deletion when there are dependencies.

See Also:


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# File 'lib/puppet/type.rb', line 2627

def purging
  @purging = true
end

#purging? ⇒ Boolean

Returns whether this resource is being purged or not. This method is used by transactions to forbid deletion when there are dependencies.


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# File 'lib/puppet/type.rb', line 2635

def purging?
  if defined?(@purging)
    @purging
  else
    false
  end
end

#ref ⇒ String

Returns a reference to this as a string in “Type” format.


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# File 'lib/puppet/type.rb', line 2608

def ref
  # memoizing this is worthwhile ~ 3 percent of calls are the "first time
  # around" in an average run of Puppet. --daniel 2012-07-17
  @ref ||= "#{self.class.name.to_s.capitalize}[#{self.title}]"
end

#remove ⇒ void

TODO:

removes if from where?

This method returns an undefined value.

Removes this object (FROM WHERE?)


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# File 'lib/puppet/type.rb', line 984

def remove()
  # This is hackish (mmm, cut and paste), but it works for now, and it's
  # better than warnings.
  @parameters.each do |name, obj|
    obj.remove
  end
  @parameters.clear

  @parent = nil

  # Remove the reference to the provider.
  if self.provider
    @provider.clear
    @provider = nil
  end
end

#retrieve ⇒ Puppet::Resource

TODO:

As opposed to all non contained properties? How is this different than any of the other methods that also “gets” properties/parameters/etc. ?

Retrieves the current value of all contained properties. Parameters and meta-parameters are not included in the result.

Raises:

  • (fail???) —

    if there is a provider and it is not suitable for the host this is evaluated for.


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# File 'lib/puppet/type.rb', line 1091

def retrieve
  fail "Provider #{provider.class.name} is not functional on this host" if self.provider.is_a?(Puppet::Provider) and ! provider.class.suitable?

  result = Puppet::Resource.new(self.class, title)

  # Provide the name, so we know we'll always refer to a real thing
  result[:name] = self[:name] unless self[:name] == title

  ensure_prop = property(:ensure)
  if !ensure_prop && self.class.needs_ensure_retrieved && self.class.validattr?(:ensure)
    ensure_prop = newattr(:ensure)
  end

  if ensure_prop
    result[:ensure] = ensure_state = ensure_prop.retrieve
  else
    ensure_state = nil
  end

  properties.each do |property|
    next if property.name == :ensure
    if ensure_state == :absent
      result[property] = :absent
    else
      result[property] = property.retrieve
    end
  end

  result
end

#retrieve_resource ⇒ Puppet::Resource

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Retrieve the current state of the system as a Puppet::Resource. For the base Puppet::Type this does the same thing as #retrieve, but specific types are free to implement #retrieve as returning a hash, and this will call #retrieve and convert the hash to a resource. This is used when determining when syncing a resource.


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# File 'lib/puppet/type.rb', line 1132

def retrieve_resource
  resource = retrieve
  resource = Resource.new(self.class, title, :parameters => resource) if resource.is_a? Hash
  resource
end

#self_refresh? ⇒ Boolean

TODO:

check that meaningful yardoc is produced - this method delegates to “self.class.self_refresh”


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# File 'lib/puppet/type.rb', line 2618

def self_refresh?
  self.class.self_refresh
end

#set_default(attr) ⇒ void

TODO:

comment says “For any parameters or properties that have defaults and have not yet been set, set them now. This method can be handed a list of attributes, and if so it will only set defaults for those attributes.”

TODO:

Needs a better explanation, and investigation about the claim an array can be passed (it is passed to self.class.attrclass to produce a class on which a check is made if it has a method class :default (does not seem to support an array…

This method returns an undefined value.


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# File 'lib/puppet/type.rb', line 847

def set_default(attr)
  klass = self.class.attrclass(attr)
  return unless klass
  # TODO this is not a necessary check, as we define a class level attr_reader
  return unless klass.method_defined?(:default)
  return if @parameters.include?(klass.name)

  parameter = newattr(klass.name)
  return unless parameter

  value = parameter.default
  if value and ! value.nil?
    parameter.value = value
  else
    @parameters.delete(parameter.name)
  end
end

#should(name) ⇒ Object?

Returns the 'should' (wanted state) value for a specified property, or nil if the given attribute name is not a property (i.e. if it is a parameter, meta-parameter, or does not exist).


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# File 'lib/puppet/type.rb', line 751

def should(name)
  prop = @parameters[name.intern]
  if prop && prop.is_a?(Puppet::Property)
    prop.should
  else
    nil
  end
end

#suitable? ⇒ Boolean

Returns true if this is something else than a `:provider`, or if it is a provider and it is suitable, or if there is a default provider. Otherwise, false is returned.


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# File 'lib/puppet/type.rb', line 2020

def suitable?
  # If we don't use providers, then we consider it suitable.
  return true unless self.class.paramclass(:provider)

  # We have a provider and it is suitable.
  return true if provider && provider.class.suitable?

  # We're using the default provider and there is one.
  if !provider and self.class.defaultprovider
    self.provider = self.class.defaultprovider.name
    return true
  end

  # We specified an unsuitable provider, or there isn't any suitable
  # provider.
  false
end

#tags=(list) ⇒ void

This method returns an undefined value.

Sets the initial list of tags to associate to this resource.


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# File 'lib/puppet/type.rb', line 2241

def tags=(list)
  tag(self.class.name)
  tag(*list)
end

#to_hash ⇒ Hash{ ??? => ??? }

TODO:

the comment says: “Convert our object to a hash. This just includes properties.”

TODO:

this is confused, again it is the @parameters instance variable that is consulted, and each value is copied - does it contain “properties” and “parameters” or both? Does it contain meta-parameters?

Returns a hash of WHAT?. The hash is a shallow copy, any changes to the objects returned in this hash will be reflected in the original resource having these attributes.


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# File 'lib/puppet/type.rb', line 873

def to_hash
  rethash = {}

  @parameters.each do |name, obj|
    rethash[name] = obj.value
  end

  rethash
end

#to_resource ⇒ Puppet::Resource

Convert this resource type instance to a Puppet::Resource.


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# File 'lib/puppet/type.rb', line 2676

def to_resource
  resource = self.retrieve_resource
  resource.merge_tags_from(self)

  @parameters.each do |name, param|
    # Avoid adding each instance name twice
    next if param.class.isnamevar? and param.value == self.title

    # We've already got property values
    next if param.is_a?(Puppet::Property)
    resource[name] = param.value
  end

  resource
end

#to_s ⇒ Object

Produces a reference to this in reference format.

See Also:


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# File 'lib/puppet/type.rb', line 2669

def to_s
  self.ref
end

#type ⇒ String

TODO:

Would that be “file” for the “File” resource type? of “File” or something else?

Returns the name of this object's class


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# File 'lib/puppet/type.rb', line 886

def type
  self.class.name
end

#uniqueness_key ⇒ Object

Produces a resource's uniqueness_key (or composite key). This key is an array of all key attributes' values. Each distinct tuple must be unique for each resource type.

See Also:


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# File 'lib/puppet/type.rb', line 443

def uniqueness_key
  self.class.key_attributes.sort_by { |attribute_name| attribute_name.to_s }.map{ |attribute_name| self[attribute_name] }
end

#value(name) ⇒ Object?

TODO:

Comment says “Return a specific value for an attribute.”, as opposed to what “An unspecific value”???

TODO:

is this the 'is' or the 'should' value?

TODO:

why is the return restricted to things that respond to :value? (Only non structural basic data types supported?

Returns the value of the attribute having the given name, or nil if the given name is not an attribute, or the referenced attribute does not respond to `:value`.


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# File 'lib/puppet/type.rb', line 897

def value(name)
  name = name.intern

  obj = @parameters[name]
  if obj && obj.respond_to?(:value)
    obj.value
  else
    nil
  end
end

#version ⇒ ???

TODO:

What is this used for? Needs a better explanation.

Returns the version of the catalog or 0 if there is no catalog.


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# File 'lib/puppet/type.rb', line 910

def version
  return 0 unless catalog
  catalog.version
end

#virtual? ⇒ Boolean

Returns whether the resource is virtual or not


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# File 'lib/puppet/type.rb', line 2693

def virtual?;  !!@virtual;  end