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Class: Gem::Resolver::Specification

Relationships & Source Files
Extension / Inclusion / Inheritance Descendants
Subclasses:
APISpecification, GitSpecification, IndexSpecification, InstalledSpecification, LocalSpecification, LockSpecification, SpecSpecification, VendorSpecification
Inherits: Object
Defined in: lib/rubygems/resolver/specification.rb

Overview

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

Class Method Summary

Instance Attribute Summary

Instance Method Summary

Constructor Details

.new ⇒ Specification

Sets default instance variables for the specification.

[ GitHub ] 

  


# File 'lib/rubygems/resolver/specification.rb', line 50



def initialize
  @dependencies = nil
  @name         = nil
  @platform     = nil
  @set          = nil
  @source       = nil
  @version      = nil
end


  







Instance Attribute Details



  

    #dependencies   (readonly)
  



  

    

The dependencies of the gem for this specification


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 12



attr_reader :dependencies


  








  

    #installable_platform?  ⇒ Boolean  (readonly)
  



  

    

Returns true if this specification is installable on this platform.


  





  


  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 103



def installable_platform?
  Gem::Platform.match spec.platform
end


  








  

    #name   (readonly)
  



  

    

The name of the gem for this specification


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 17



attr_reader :name


  








  

    #platform   (readonly)
  



  

    

The platform this gem works on.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 22



attr_reader :platform


  








  

    #set   (readonly)
  



  

    

The set this specification came from.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 27



attr_reader :set


  








  

    #source   (readonly)
  



  

    

The source for this specification


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 32



attr_reader :source


  








  

    #spec   (readonly)
  



  

    

The ::Gem::Specification for this Specification.



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


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 40



attr_reader :spec


  








  

    #version   (readonly)
  



  

    

The version of the gem for this specification.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 45



attr_reader :version


  







Instance Method Details



  

    #full_name  
  



  

    

The name and version of the specification.



Unlike Specification#full_name, the platform is not included.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 71



def full_name
  "#{@name}-#{@version}"
end


  








  

    #install(options = {}) {|installer| ... } 
  



  

    

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.


  





  
Yields:





  [ GitHub ]


  

  


# File 'lib/rubygems/resolver/specification.rb', line 84



def install options = {}
  require 'rubygems/installer'

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

  Gem.ensure_gem_subdirectories destination

  gem = source.download spec, destination

  installer = Gem::Installer.at gem, options

  yield installer if block_given?

  @spec = installer.install
end