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Class: Gem::PathSupport

Relationships & Source Files
Inherits: Object
Defined in: lib/rubygems/path_support.rb

Overview

PathSupport facilitates the GEM_HOME and GEM_PATH environment settings to the rest of RubyGems.

Class Method Summary

Instance Attribute Summary

  • #home readonly

    The default system path for managing Gems.

  • #path readonly

    Array of paths to search for Gems.

  • #spec_cache_dir readonly Internal use only

    Directory with spec cache.

Instance Method Summary

Constructor Details

.new(env) ⇒ PathSupport

Constructor. Takes a single argument which is to be treated like a hashtable, or defaults to ENV, the system environment.

[ GitHub ] 

  


# File 'lib/rubygems/path_support.rb', line 26



def initialize(env)
  @home = normalize_home_dir(env["GEM_HOME"] || Gem.default_dir)
  @path = split_gem_path env["GEM_PATH"], @home

  @spec_cache_dir = env["GEM_SPEC_CACHE"] || Gem.default_spec_cache_dir
end


  







Instance Attribute Details



  

    #home   (readonly)
  



  

    

The default system path for managing Gems.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 11



attr_reader :home


  








  

    #path   (readonly)
  



  

    

Array of paths to search for Gems.


  



  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 15



attr_reader :path


  








  

    #spec_cache_dir   (readonly)
  

  

    This method is for internal use only.
  



  

    

Directory with spec cache


  



  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 19



attr_reader :spec_cache_dir # :nodoc:


  







Instance Method Details



  

    #default_path   (private)
  



  

    

Return the default ::Gem path


  



  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 74



def default_path
  Gem.default_path + [@home]
end


  








  

    #expand(path)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 78



def expand(path)
  if File.directory?(path)
    File.realpath(path)
  else
    path
  end
end


  








  

    #normalize_home_dir(home)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 35



def normalize_home_dir(home)
  if File::ALT_SEPARATOR
    home = home.gsub(File::ALT_SEPARATOR, File::SEPARATOR)
  end

  expand(home)
end


  








  

    #split_gem_path(gpaths, home)   (private)
  



  

    

Split the ::Gem search path (as reported by Gem.path).


  



  [ GitHub ]


  

  


# File 'lib/rubygems/path_support.rb', line 46



def split_gem_path(gpaths, home)
  # FIX: it should be [home, *path], not [*path, home]

  gem_path = []

  if gpaths
    gem_path = gpaths.split(Gem.path_separator)
    # Handle the path_separator being set to a regexp, which will cause
    # end_with? to error
    if /#{Gem.path_separator}\z/.match?(gpaths)
      gem_path += default_path
    end

    if File::ALT_SEPARATOR
      gem_path.map! do |this_path|
        this_path.gsub File::ALT_SEPARATOR, File::SEPARATOR
      end
    end

    gem_path << home
  else
    gem_path = default_path
  end

  gem_path.map {|path| expand(path) }.uniq
end