class Gem::PathSupport

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

Attributes

home[R]

The default system path for managing Gems.

path[R]

Array of paths to search for Gems.

Public Class Methods

new(env=ENV) click to toggle source

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

# File lib/rubygems/path_support.rb, line 25
def initialize(env=ENV)
  @env = env

  # note 'env' vs 'ENV'...
  @home     = env["GEM_HOME"] || ENV["GEM_HOME"] || Gem.default_dir

  if File::ALT_SEPARATOR then
    @home   = @home.gsub(File::ALT_SEPARATOR, File::SEPARATOR)
  end

  self.path = env["GEM_PATH"] || ENV["GEM_PATH"]

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

  @spec_cache_dir = @spec_cache_dir.dup.untaint
end

Private Instance Methods

default_path() click to toggle source

Return the default Gem path

# File lib/rubygems/path_support.rb, line 82
def default_path
  gem_path = Gem.default_path + [@home]

  if defined?(APPLE_GEM_HOME)
    gem_path << APPLE_GEM_HOME
  end
  gem_path
end

path=(gpaths) click to toggle source

Set the Gem search path (as reported by Gem.path).

# File lib/rubygems/path_support.rb, line 49
def path=(gpaths)
  # FIX: it should be [home, *path], not [*path, home]

  gem_path = []

  # FIX: I can't tell wtf this is doing.
  gpaths ||= (ENV['GEM_PATH'] || "").empty? ? nil : ENV["GEM_PATH"]

  if gpaths
    if gpaths.kind_of?(Array)
      gem_path = gpaths.dup
    else
      gem_path = gpaths.split(Gem.path_separator)
      if gpaths.end_with?(Gem.path_separator)
        gem_path += default_path
      end
    end

    if File::ALT_SEPARATOR then
      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

  @path = gem_path.uniq
end