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Class: Gem::StubSpecification

Relationships & Source Files
Namespace Children
Classes:
StubLine
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, BasicSpecification
Instance Chain:
self, BasicSpecification
Inherits: Gem::BasicSpecification
Defined in: lib/rubygems/stub_specification.rb

Overview

StubSpecification reads the stub: line from the gemspec. This prevents us having to eval the entire gemspec in order to find out certain information.

Constant Summary

Class Method Summary

BasicSpecification - Inherited

.default_specifications_dir, .new

Instance Attribute Summary

BasicSpecification - Inherited

#activated?

True when the gem has been activated.
#base_dir

Returns the full path to the base gem directory.
#default_gem?,
#extension_dir

Returns full path to the directory where gem's extensions are installed.
#full_gem_path

The full path to the gem (install path + full name).
#loaded_from

The path this gemspec was loaded from.
#stubbed?

Whether this specification is stubbed - i.e.
#have_extensions?,
#base_dir=

Allows installation of extensions for git: gems.
#extension_dir=

Sets the directory where extensions for this gem will be installed.
#full_gem_path=

Allows correct activation of git: and path: gems.
#ignored=

Is this specification ignored for activation purposes?

Instance Method Summary

BasicSpecification - Inherited

#contains_requirable_file?

Return true if this spec can require file.
#datadir

The path to the data directory for this gem.
#extensions_dir

Returns path to the extensions directory.
#full_name

Returns the full name (name-version) of this ::Gem.
#full_require_paths

Full paths in the gem to add to $LOAD_PATH when this gem is activated.
#gem_dir

Returns the full path to this spec's gem directory.
#gems_dir

Returns the full path to the gems directory containing this spec's gem directory.
#lib_dirs_glob

Returns a string usable in Dir.glob to match all requirable paths for this spec.
#matches_for_glob

Return all files in this gem that match for glob.
#name

Name of the gem.
#platform

Platform of the gem.
#require_paths

Paths in the gem to add to $LOAD_PATH when this gem is activated.
#source_paths

Returns the paths to the source files for use with analysis and documentation tools.
#this,
#to_fullpath

Full path of the target library file.
#to_spec

Return a Specification from this gem.
#version

Version of the gem.
#have_file?,
#gem_build_complete_path

The path to the gem.build_complete file within the extension install directory.
#internal_init, #raw_require_paths, #find_full_gem_path

Constructor Details

.new(filename, base_dir, gems_dir, default_gem) ⇒ StubSpecification

[ GitHub ] 

  


# File 'lib/rubygems/stub_specification.rb', line 73



def initialize filename, base_dir, gems_dir, default_gem
  super()
  filename.untaint

  self.loaded_from = filename
  @data            = nil
  @name            = nil
  @spec            = nil
  @base_dir        = base_dir
  @gems_dir        = gems_dir
  @default_gem     = default_gem
end


  







Class Method Details



  

    .default_gemspec_stub(filename, base_dir, gems_dir)  
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 63



def self.default_gemspec_stub filename, base_dir, gems_dir
  new filename, base_dir, gems_dir, true
end


  








  

    .gemspec_stub(filename, base_dir, gems_dir)  
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 67



def self.gemspec_stub filename, base_dir, gems_dir
  new filename, base_dir, gems_dir, false
end


  







Instance Attribute Details



  

    #activated?  ⇒ Boolean  (readonly)
  



  

    

True when this gem has been activated


  





  


  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 89



def activated?
  @activated ||=
  begin
    loaded = Gem.loaded_specs[name]
    loaded && loaded.version == version
  end
end


  








  

    #base_dir   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 71



attr_reader :base_dir, :gems_dir


  








  

    #default_gem?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 97



def default_gem?
  @default_gem
end


  








  

    #gems_dir   (readonly)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 71



attr_reader :base_dir, :gems_dir


  








  

    #missing_extensions?  ⇒ Boolean  (readonly)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 148



def missing_extensions?
  return false if default_gem?
  return false if extensions.empty?
  return false if File.exist? gem_build_complete_path

  to_spec.missing_extensions?
end


  








  

    #stubbed?  ⇒ Boolean  (readonly)
  



  

    

Is there a stub line present for this StubSpecification?


  





  


  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 214



def stubbed?
  data.is_a? StubLine
end


  








  

    #valid?  ⇒ Boolean  (readonly)
  



  

    

Is this StubSpecification valid? i.e. have we found a stub line, OR does the filename contain a valid gemspec?


  





  


  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 207



def valid?
  data
end


  







Instance Method Details



  

    #build_extensions  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 101



def build_extensions # :nodoc:
  return if default_gem?
  return if extensions.empty?

  to_spec.build_extensions
end


  








  

    #data   (private)
  



  

    

If the gemspec contains a stubline, returns a StubSpecification::StubLine instance. Otherwise returns the full Specification.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 112



def data
  unless @data
    begin
      saved_lineno = $.

      # TODO It should be use `File.open`, but bundler-1.16.1 example expects Kernel#open.
      open loaded_from, OPEN_MODE do |file|
        begin
          file.readline # discard encoding line
          stubline = file.readline.chomp
          if stubline.start_with?(PREFIX) then
            extensions = if /\A#{PREFIX}/ =~ file.readline.chomp
                           $'.split "\0"
                         else
                           StubLine::NO_EXTENSIONS
                         end

            @data = StubLine.new stubline, extensions
          end
        rescue EOFError
        end
      end
    ensure
      $. = saved_lineno
    end
  end

  @data ||= to_spec
end


  








  

    #extensions  
  



  

    

Extensions for this gem


  



  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 173



def extensions
  data.extensions
end


  








  

    #full_name  
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 184



def full_name
  data.full_name
end


  








  

    #name  
  



  

    

Name of the gem


  



  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 159



def name
  data.name
end


  








  

    #platform  
  



  

    

Platform of the gem


  



  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 166



def platform
  data.platform
end


  








  

    #raw_require_paths  
  

  

    This method is for internal use only.
  

  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 144



def raw_require_paths # :nodoc:
  data.require_paths
end


  








  

    #to_spec  
  



  

    

The full Specification for this gem, loaded from evalling its gemspec


  



  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 191



def to_spec
  @spec ||= if @data then
              loaded = Gem.loaded_specs[name]
              loaded if loaded && loaded.version == version
            end

  @spec ||= Gem::Specification.load(loaded_from)
  @spec.ignored = @ignored if @spec

  @spec
end


  








  

    #version  
  



  

    

Version of the gem


  



  [ GitHub ]


  

  


# File 'lib/rubygems/stub_specification.rb', line 180



def version
  data.version
end