summaryrefslogtreecommitdiff
path: root/jni/ruby/lib/rubygems/path_support.rb
blob: 2af303eecf89f0c64a3517d7cbda5a6b19a3ee8c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
##
#
# Gem::PathSupport facilitates the GEM_HOME and GEM_PATH environment settings
# to the rest of RubyGems.
#
class Gem::PathSupport
  ##
  # The default system path for managing Gems.
  attr_reader :home

  ##
  # Array of paths to search for Gems.
  attr_reader :path

  ##
  # Directory with spec cache
  attr_reader :spec_cache_dir # :nodoc:

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

  ##
  # Set the Gem home directory (as reported by Gem.dir).

  def home=(home)
    @home = home.to_s
  end

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

  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)
      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 = Gem.default_path + [@home]

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

    @path = gem_path.uniq
  end
end