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) 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 rubygems/path_support.rb, line 26
def initialize(env)
  @home = env["GEM_HOME"] || Gem.default_dir

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

  @home = expand(@home)

  @path = split_gem_path env["GEM_PATH"], @home

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

  @spec_cache_dir = @spec_cache_dir.dup.tap(&Gem::UNTAINT)
end

Private Instance Methods

default_path() click to toggle source

Return the default Gem path

# File rubygems/path_support.rb, line 75
def default_path
  Gem.default_path + [@home]
end

expand(path) click to toggle source

# File rubygems/path_support.rb, line 79
def expand(path)
  if File.directory?(path)
    File.realpath(path)
  else
    path
  end
end

split_gem_path(gpaths, home) click to toggle source

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

# File rubygems/path_support.rb, line 47
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 gpaths =~ /#{Gem.path_separator}\z/
      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