class Gem::Resolver::Specification

A Resolver::Specification contains a subset of the information contained in a Gem::Specification. Only the information necessary for dependency resolution in the resolver is included.



The dependencies of the gem for this specification


The name of the gem for this specification


The platform this gem works on.


The set this specification came from.


The source for this specification


The Gem::Specification for this Resolver::Specification.

Implementers, note that install updates @spec, so be sure to cache the Gem::Specification in @spec when overriding.


The version of the gem for this specification.

Public Class Methods

new() click to toggle source

Sets default instance variables for the specification.

# File lib/rubygems/resolver/specification.rb, line 49
def initialize
  @dependencies = nil
  @name         = nil
  @platform     = nil
  @set          = nil
  @source       = nil
  @version      = nil

Public Instance Methods

full_name() click to toggle source

The name and version of the specification.

Unlike Gem::Specification#full_name, the platform is not included.

# File lib/rubygems/resolver/specification.rb, line 70
def full_name
install(options = {}) { |installer| ... } click to toggle source

Installs this specification using the Gem::Installer options. The install method yields a Gem::Installer instance, which indicates the gem will be installed, or nil, which indicates the gem is already installed.

After installation spec is updated to point to the just-installed specification.

# File lib/rubygems/resolver/specification.rb, line 83
def install options = {}
  require 'rubygems/installer'

  destination = options[:install_dir] || Gem.dir

  Gem.ensure_gem_subdirectories destination

  gem = spec, destination

  installer = gem, options

  yield installer if block_given?

  @spec = installer.install
installable_platform?() click to toggle source

Returns true if this specification is installable on this platform.

# File lib/rubygems/resolver/specification.rb, line 102
def installable_platform?
  Gem::Platform.match spec.platform