Class: Net::IMAP::Config

Relationships & Source Files
Namespace Children
Modules: `AttrAccessors`, `AttrInheritance`, `AttrTypeCoercion`
Super Chains via Extension / Inclusion / Inheritance
Instance Chain: self, `AttrTypeCoercion`, `AttrInheritance`, `AttrAccessors`
Inherits:	Object
Defined in:	lib/net/imap/config.rb, lib/net/imap/config/attr_accessors.rb, lib/net/imap/config/attr_inheritance.rb, lib/net/imap/config/attr_type_coercion.rb

Overview

Config (available since v0.4.13) stores configuration options for ::Net::IMAP clients. The global configuration can be seen at either config or .global, and the client-specific configuration can be seen at #config.

When creating a new client, all unhandled keyword arguments to new are delegated to .new. Every client has its own config.

debug_client = Net::IMAP.new(hostname, debug: true)
quiet_client = Net::IMAP.new(hostname, debug: false)
debug_client.config.debug?  # => true
quiet_client.config.debug?  # => false

Inheritance

Configs have a parent config, and any attributes which have not been set locally will inherit the parent’s value. Every client creates its own specific config. By default, client configs inherit from .global.

plain_client = Net::IMAP.new(hostname)
debug_client = Net::IMAP.new(hostname, debug: true)
quiet_client = Net::IMAP.new(hostname, debug: false)

plain_client.config.inherited?(:debug)  # => true
debug_client.config.inherited?(:debug)  # => false
quiet_client.config.inherited?(:debug)  # => false

plain_client.config.debug?  # => false
debug_client.config.debug?  # => true
quiet_client.config.debug?  # => false

# Net::IMAP.debug is delegated to Net::IMAP::Config.global.debug
Net::IMAP.debug = true
plain_client.config.debug?  # => true
debug_client.config.debug?  # => true
quiet_client.config.debug?  # => false

Net::IMAP.debug = false
plain_client.config.debug = true
plain_client.config.inherited?(:debug)  # => false
plain_client.config.debug?  # => true
plain_client.config.reset(:debug)
plain_client.config.inherited?(:debug)  # => true
plain_client.config.debug?  # => false

Versioned defaults

The effective default configuration for a specific x.y version of net-imap can be loaded with the config keyword argument to new. Requesting default configurations for previous versions enables extra backward compatibility with those versions:

client = Net::IMAP.new(hostname, config: 0.3)
client.config.sasl_ir                  # => false
client.config.responses_without_block  # => :silence_deprecation_warning

client = Net::IMAP.new(hostname, config: 0.4)
client.config.sasl_ir                  # => true
client.config.responses_without_block  # => :silence_deprecation_warning

client = Net::IMAP.new(hostname, config: 0.5)
client.config.sasl_ir                  # => true
client.config.responses_without_block  # => :warn

client = Net::IMAP.new(hostname, config: :future)
client.config.sasl_ir                  # => true
client.config.responses_without_block  # => :frozen_dup

The versioned default configs inherit certain specific config options from .global, for example #debug:

client = Net::IMAP.new(hostname, config: 0.4)
Net::IMAP.debug = false
client.config.debug?  # => false

Net::IMAP.debug = true
client.config.debug?  # => true

Use #load_defaults to globally behave like a specific version:

client = Net::IMAP.new(hostname)
client.config.sasl_ir              # => true
Net::IMAP.config.load_defaults 0.3
client.config.sasl_ir              # => false

Named defaults

In addition to x.y version numbers, the following aliases are supported:

:default: An alias for :current.

NOTE: This is not the same as Config.default. It inherits some attributes from Config.global, for example: #debug.
:current: An alias for the current x.y version’s defaults.
:next: The planned config for the next x.y version.
:future: The planned eventual config for some future x.y version.

For example, to disable all currently deprecated behavior:

client = Net::IMAP.new(hostname, config: :future)
client.config.response_without_args     # => :frozen_dup
client.responses.frozen?                # => true
client.responses.values.all?(&:frozen?) # => true

Thread Safety

NOTE: Updates to config objects are not synchronized for thread-safety.

Constant Summary

DEFAULT_TO_INHERIT = private

Array of attribute names that are not loaded by #load_defaults.

# File 'lib/net/imap/config.rb', line 124
```
%i[debug].freeze
```

`AttrInheritance` - Included

INHERITED

`AttrTypeCoercion` - Included

Enum, NilOrInteger, Types

Class Method Summary

Net::IMAP::Config ⇒ Config

Given a version number, returns the default configuration for the target version.
.default

The default config, which is hardcoded and frozen.
.global

The global config object.
.new(parent = Config.global, **attrs) {|_self| ... } ⇒ Config constructor

Creates a new config object and initialize its attribute with attrs.
.version_defaults

A hash of hard-coded configurations, indexed by version number or name.

Instance Attribute Summary

`AttrInheritance` - Included

#parent

The parent Config object.

`AttrAccessors` - Included

#data

internal API.

Instance Method Summary

#load_defaults(version) ⇒ self

Resets the current config to behave like the versioned default configuration for version.
#to_h ⇒ Hash

Returns all config attributes in a hash.
#update(**attrs) ⇒ self

Assigns all of the provided attrs to this config, and returns self.
#with(**attrs) ⇒ Config

Without a block, returns a new config which inherits from self.
#defaults_hash protected
#responses_without_args Internal use only
#responses_without_args= Internal use only

`AttrInheritance` - Included

#inherited?	Returns `true` if `attr` is inherited from `#parent` and not overridden by this config.
#initialize	:notnew:
#new	Creates a new config, which inherits from `self`.
#reset	Resets an `attr` to inherit from the `#parent` config.
#initialize_copy

`AttrAccessors` - Included

#freeze	Freezes the internal attributes struct, in addition to `self`.
#initialize	:notnew:
#initialize_clone, #initialize_dup

Constructor Details

.new(parent = Config.global, **attrs) {|_self| ... } ⇒ `Config`

Creates a new config object and initialize its attribute with attrs.

If parent is not given, the global config is used by default.

If a block is given, the new config object is yielded to it.

Yields:

(_self)

[ GitHub ]

# File 'lib/net/imap/config.rb', line 409


def initialize(parent = Config.global, **attrs)
  super(parent)
  update(**attrs)
  yield self if block_given?
end

Class Method Details

Net::IMAP::Config ⇒ `Config` Net::IMAP::Config ⇒ `Config` Net::IMAP::Config ⇒ `Config` Net::IMAP::Config ⇒ `Config`

Given a version number, returns the default configuration for the target version. See Config@Versioned+defaults.

Given a version name, returns the default configuration for the target version. See Config@Named+defaults.

Given a Hash, creates a new frozen config which inherits from .global. Use .new for an unfrozen config.

Given a config, returns that same config.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 170


def self.[](config)
  if    config.is_a?(Config)         then config
  elsif config.nil? && global.nil?   then nil
  elsif config.respond_to?(:to_hash) then new(global, **config).freeze
  else
    version_defaults[config] or
      case config
      when Numeric
        raise RangeError, "unknown config version: %p" % [config]
      when String, Symbol
        raise KeyError, "unknown config name: %p" % [config]
      else
        raise TypeError, "no implicit conversion of %s to %s" % [
          config.class, Config
        ]
      end
  end
end

.default

The default config, which is hardcoded and frozen.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 128


def self.default; @default end

.global

The global config object. Also available from Net::IMAP.config.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 131


def self.global; @global if defined?(@global) end

.version_defaults

A hash of hard-coded configurations, indexed by version number or name. Values can be accessed with any object that responds to to_sym or to_r+/+to_f with a non-zero number.

.[] gets named or numbered versions from this hash.

For example:

Net::IMAP::Config.version_defaults[0.5] == Net::IMAP::Config[0.5]
Net::IMAP::Config[0.5]       == Net::IMAP::Config[0.5r]     # => true
Net::IMAP::Config["current"] == Net::IMAP::Config[:current] # => true
Net::IMAP::Config["0.5.6"]   == Net::IMAP::Config[0.5r]     # => true

[ GitHub ]

# File 'lib/net/imap/config.rb', line 144


def self.version_defaults; @version_defaults end

Instance Method Details

#defaults_hash (protected)

[ GitHub ]

# File 'lib/net/imap/config.rb', line 473


def defaults_hash
  to_h.reject {|k,v| DEFAULT_TO_INHERIT.include?(k) }
end

#load_defaults(version) ⇒ `self`

Resets the current config to behave like the versioned default configuration for version. #parent will not be changed.

Some config attributes default to inheriting from their #parent (which is usually .global) and are left unchanged, for example: #debug.

See Config@Versioned+defaults and Config@Named+defaults.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 460


def load_defaults(version)
  [Numeric, Symbol, String].any? { _1 === version } or
    raise ArgumentError, "expected number or symbol, got %p" % [version]
  update(**Config[version].defaults_hash)
end

#responses_without_args

This method is for internal use only.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 335


alias responses_without_args  responses_without_block  # :nodoc:

#responses_without_args=

This method is for internal use only.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 336


alias responses_without_args= responses_without_block= # :nodoc:

#to_h ⇒ `Hash`

Returns all config attributes in a hash.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 469


def to_h; data.members.to_h { [_1, send(_1)] } end

#update(**attrs) ⇒ `self`

Assigns all of the provided attrs to this config, and returns self.

An ArgumentError is raised unless every key in attrs matches an assignment method on Config.

NOTE: #update is not atomic. If an exception is raised due to an invalid attribute value, attrs may be partially applied.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 425


def update(**attrs)
  unless (bad = attrs.keys.reject { respond_to?(:"#{_1}=") }).empty?
    raise ArgumentError, "invalid config options: #{bad.join(", ")}"
  end
  attrs.each do send(:"#{_1}=", _2) end
  self
end

#with(attrs) ⇒ `Config` #with(attrs) {|config| ... } ⇒ `result`

Without a block, returns a new config which inherits from self. With a block, yields the new config and returns the block’s result.

If no keyword arguments are given, an ArgumentError will be raised.

If self is frozen, the copy will also be frozen.

[ GitHub ]

# File 'lib/net/imap/config.rb', line 443


def with(**attrs)
  attrs.empty? and
    raise ArgumentError, "expected keyword arguments, none given"
  copy = new(**attrs)
  copy.freeze if frozen?
  block_given? ? yield(copy) : copy
end

Class: Net::IMAP::Config

Overview

Inheritance

Versioned defaults

Named defaults

Thread Safety

Constant Summary

AttrInheritance - Included

AttrTypeCoercion - Included

Class Method Summary

Instance Attribute Summary

AttrInheritance - Included

AttrAccessors - Included

Instance Method Summary

AttrInheritance - Included

AttrAccessors - Included

Constructor Details

.new(parent = Config.global, **attrs) {|_self| ... } ⇒ Config

Class Method Details

Net::IMAP::Config ⇒ Config Net::IMAP::Config ⇒ Config Net::IMAP::Config ⇒ Config Net::IMAP::Config ⇒ Config

.default

.global

.version_defaults

Instance Method Details

#defaults_hash (protected)

#load_defaults(version) ⇒ self

#responses_without_args

#responses_without_args=

#to_h ⇒ Hash

#update(**attrs) ⇒ self

#with(**attrs) ⇒ Config #with(**attrs) {|config| ... } ⇒ result

`AttrInheritance` - Included

`AttrTypeCoercion` - Included

`AttrInheritance` - Included

`AttrAccessors` - Included

`AttrInheritance` - Included

`AttrAccessors` - Included

.new(parent = Config.global, **attrs) {|_self| ... } ⇒ `Config`

Net::IMAP::Config ⇒ `Config` Net::IMAP::Config ⇒ `Config` Net::IMAP::Config ⇒ `Config` Net::IMAP::Config ⇒ `Config`

#load_defaults(version) ⇒ `self`

#to_h ⇒ `Hash`

#update(**attrs) ⇒ `self`

#with(attrs) ⇒ `Config` #with(attrs) {|config| ... } ⇒ `result`