1 files changed, 128 insertions, 0 deletions
diff --git a/ruby_1_9_3/lib/rdoc/ri/paths.rb b/ruby_1_9_3/lib/rdoc/ri/paths.rb
new file mode 100644
index 0000000000..a3c65bf928
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+++ b/ruby_1_9_3/lib/rdoc/ri/paths.rb
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+require 'rdoc/ri'
+
+##
+# The directories where ri data lives.
+
+module RDoc::RI::Paths
+
+  #:stopdoc:
+  require 'rbconfig'
+
+  version = RbConfig::CONFIG['ruby_version']
+
+  base    = if RbConfig::CONFIG.key? 'ridir' then
+              File.join RbConfig::CONFIG['ridir'], version
+            else
+              File.join RbConfig::CONFIG['datadir'], 'ri', version
+            end
+
+  SYSDIR  = File.join base, "system"
+  SITEDIR = File.join base, "site"
+
+  homedir = begin
+              File.expand_path('~')
+            rescue ArgumentError
+            end
+
+  homedir ||= ENV['HOME'] ||
+              ENV['USERPROFILE'] || ENV['HOMEPATH'] # for 1.8 compatibility
+
+  HOMEDIR = if homedir then
+              File.join homedir, ".rdoc"
+            end
+  #:startdoc:
+
+  @gemdirs = nil
+
+  ##
+  # Iterates over each selected path yielding the directory and type.
+  #
+  # Yielded types:
+  # :system:: Where Ruby's ri data is stored.  Yielded when +system+ is
+  #           true
+  # :site:: Where ri for installed libraries are stored.  Yielded when
+  #         +site+ is true.  Normally no ri data is stored here.
+  # :home:: ~/.rdoc.  Yielded when +home+ is true.
+  # :gem:: ri data for an installed gem.  Yielded when +gems+ is true.
+  # :extra:: ri data directory from the command line.  Yielded for each
+  #          entry in +extra_dirs+
+
+  def self.each system, site, home, gems, *extra_dirs # :yields: directory, type
+    extra_dirs.each do |dir|
+      yield dir, :extra
+    end
+
+    yield SYSDIR,  :system if system
+    yield SITEDIR, :site   if site
+    yield HOMEDIR, :home   if home and HOMEDIR
+
+    gemdirs.each do |dir|
+      yield dir, :gem
+    end if gems
+
+    nil
+  end
+
+  ##
+  # The latest installed gems' ri directories
+
+  def self.gemdirs
+    return @gemdirs if @gemdirs
+
+    require 'rubygems' unless defined?(Gem)
+
+    # HACK dup'd from Gem.latest_partials and friends
+    all_paths = []
+
+    all_paths = Gem.path.map do |dir|
+      Dir[File.join(dir, 'doc', '*', 'ri')]
+    end.flatten
+
+    ri_paths = {}
+
+    all_paths.each do |dir|
+      base = File.basename File.dirname(dir)
+      if base =~ /(.*)-((\d+\.)*\d+)/ then
+        name, version = $1, $2
+        ver = Gem::Version.new version
+        if ri_paths[name].nil? or ver > ri_paths[name][0] then
+          ri_paths[name] = [ver, dir]
+        end
+      end
+    end
+
+    @gemdirs = ri_paths.map { |k,v| v.last }.sort
+  rescue LoadError
+    @gemdirs = []
+  end
+
+  ##
+  # Returns existing directories from the selected documentation directories
+  # as an Array.
+  #
+  # See also ::each
+
+  def self.path(system, site, home, gems, *extra_dirs)
+    path = raw_path system, site, home, gems, *extra_dirs
+
+    path.select { |directory| File.directory? directory }
+  end
+
+  ##
+  # Returns selected documentation directories including nonexistent
+  # directories.
+  #
+  # See also ::each
+
+  def self.raw_path(system, site, home, gems, *extra_dirs)
+    path = []
+
+    each(system, site, home, gems, *extra_dirs) do |dir, type|
+      path << dir
+    end
+
+    path.compact
+  end
+
+end
+