Fresh start

5 files changed, 1766 insertions, 0 deletions

diff --git a/jni/ruby/lib/rdoc/ri/driver.rb b/jni/ruby/lib/rdoc/ri/driver.rb
new file mode 100644
index 0000000..39064c1
--- /dev/null
+++ b/jni/ruby/lib/rdoc/ri/driver.rb
@@ -0,0 +1,1497 @@
+require 'abbrev'
+require 'optparse'
+
+begin
+  require 'readline'
+rescue LoadError
+end
+
+begin
+  require 'win32console'
+rescue LoadError
+end
+
+require 'rdoc'
+
+##
+# For RubyGems backwards compatibility
+
+require 'rdoc/ri/formatter'
+
+##
+# The RI driver implements the command-line ri tool.
+#
+# The driver supports:
+# * loading RI data from:
+#   * Ruby's standard library
+#   * RubyGems
+#   * ~/.rdoc
+#   * A user-supplied directory
+# * Paging output (uses RI_PAGER environment variable, PAGER environment
+#   variable or the less, more and pager programs)
+# * Interactive mode with tab-completion
+# * Abbreviated names (ri Zl shows Zlib documentation)
+# * Colorized output
+# * Merging output from multiple RI data sources
+
+class RDoc::RI::Driver
+
+  ##
+  # Base Driver error class
+
+  class Error < RDoc::RI::Error; end
+
+  ##
+  # Raised when a name isn't found in the ri data stores
+
+  class NotFoundError < Error
+
+    ##
+    # Name that wasn't found
+
+    alias name message
+
+    def message # :nodoc:
+      "Nothing known about #{super}"
+    end
+  end
+
+  ##
+  # Show all method documentation following a class or module
+
+  attr_accessor :show_all
+
+  ##
+  # An RDoc::RI::Store for each entry in the RI path
+
+  attr_accessor :stores
+
+  ##
+  # Controls the user of the pager vs $stdout
+
+  attr_accessor :use_stdout
+
+  ##
+  # Default options for ri
+
+  def self.default_options
+    options = {}
+    options[:interactive] = false
+    options[:profile]     = false
+    options[:show_all]    = false
+    options[:use_cache]   = true
+    options[:use_stdout]  = !$stdout.tty?
+    options[:width]       = 72
+
+    # By default all standard paths are used.
+    options[:use_system]     = true
+    options[:use_site]       = true
+    options[:use_home]       = true
+    options[:use_gems]       = true
+    options[:extra_doc_dirs] = []
+
+    return options
+  end
+
+  ##
+  # Dump +data_path+ using pp
+
+  def self.dump data_path
+    require 'pp'
+
+    open data_path, 'rb' do |io|
+      pp Marshal.load(io.read)
+    end
+  end
+
+  ##
+  # Parses +argv+ and returns a Hash of options
+
+  def self.process_args argv
+    options = default_options
+
+    opts = OptionParser.new do |opt|
+      opt.accept File do |file,|
+        File.readable?(file) and not File.directory?(file) and file
+      end
+
+      opt.program_name = File.basename $0
+      opt.version = RDoc::VERSION
+      opt.release = nil
+      opt.summary_indent = ' ' * 4
+
+      opt.banner = <<-EOT
+Usage: #{opt.program_name} [options] [names...]
+
+Where name can be:
+
+  Class | Module | Module::Class
+
+  Class::method | Class#method | Class.method | method
+
+  gem_name: | gem_name:README | gem_name:History
+
+All class names may be abbreviated to their minimum unambiguous form. If a name
+is ambiguous, all valid options will be listed.
+
+A '.' matches either class or instance methods, while #method
+matches only instance and ::method matches only class methods.
+
+README and other files may be displayed by prefixing them with the gem name
+they're contained in.  If the gem name is followed by a ':' all files in the
+gem will be shown.  The file name extension may be omitted where it is
+unambiguous.
+
+For example:
+
+    #{opt.program_name} Fil
+    #{opt.program_name} File
+    #{opt.program_name} File.new
+    #{opt.program_name} zip
+    #{opt.program_name} rdoc:README
+
+Note that shell quoting or escaping may be required for method names containing
+punctuation:
+
+    #{opt.program_name} 'Array.[]'
+    #{opt.program_name} compact\\!
+
+To see the default directories ri will search, run:
+
+    #{opt.program_name} --list-doc-dirs
+
+Specifying the --system, --site, --home, --gems or --doc-dir options will
+limit ri to searching only the specified directories.
+
+ri options may be set in the 'RI' environment variable.
+
+The ri pager can be set with the 'RI_PAGER' environment variable or the
+'PAGER' environment variable.
+      EOT
+
+      opt.separator nil
+      opt.separator "Options:"
+
+      opt.separator nil
+
+      opt.on("--[no-]interactive", "-i",
+             "In interactive mode you can repeatedly",
+             "look up methods with autocomplete.") do |interactive|
+        options[:interactive] = interactive
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]all", "-a",
+             "Show all documentation for a class or",
+             "module.") do |show_all|
+        options[:show_all] = show_all
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]list", "-l",
+             "List classes ri knows about.") do |list|
+        options[:list] = list
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]pager",
+             "Send output directly to stdout,",
+             "rather than to a pager.") do |use_pager|
+        options[:use_stdout] = !use_pager
+      end
+
+      opt.separator nil
+
+      opt.on("-T",
+             "Synonym for --no-pager") do
+        options[:use_stdout] = true
+      end
+
+      opt.separator nil
+
+      opt.on("--width=WIDTH", "-w", OptionParser::DecimalInteger,
+             "Set the width of the output.") do |width|
+        options[:width] = width
+      end
+
+      opt.separator nil
+
+      opt.on("--server [PORT]", Integer,
+             "Run RDoc server on the given port.",
+             "The default port is 8214.") do |port|
+        options[:server] = port || 8214
+      end
+
+      opt.separator nil
+
+      formatters = RDoc::Markup.constants.grep(/^To[A-Z][a-z]+$/).sort
+      formatters = formatters.sort.map do |formatter|
+        formatter.to_s.sub('To', '').downcase
+      end
+      formatters -= %w[html label test] # remove useless output formats
+
+      opt.on("--format=NAME", "-f",
+             "Uses the selected formatter. The default",
+             "formatter is bs for paged output and ansi",
+             "otherwise. Valid formatters are:",
+             formatters.join(' '), formatters) do |value|
+        options[:formatter] = RDoc::Markup.const_get "To#{value.capitalize}"
+      end
+
+      opt.separator nil
+      opt.separator "Data source options:"
+      opt.separator nil
+
+      opt.on("--[no-]list-doc-dirs",
+             "List the directories from which ri will",
+             "source documentation on stdout and exit.") do |list_doc_dirs|
+        options[:list_doc_dirs] = list_doc_dirs
+      end
+
+      opt.separator nil
+
+      opt.on("--doc-dir=DIRNAME", "-d", Array,
+             "List of directories from which to source",
+             "documentation in addition to the standard",
+             "directories.  May be repeated.") do |value|
+        value.each do |dir|
+          unless File.directory? dir then
+            raise OptionParser::InvalidArgument, "#{dir} is not a directory"
+          end
+
+          options[:extra_doc_dirs] << File.expand_path(dir)
+        end
+      end
+
+      opt.separator nil
+
+      opt.on("--no-standard-docs",
+             "Do not include documentation from",
+             "the Ruby standard library, site_lib,",
+             "installed gems, or ~/.rdoc.",
+             "Use with --doc-dir") do
+        options[:use_system] = false
+        options[:use_site] = false
+        options[:use_gems] = false
+        options[:use_home] = false
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]system",
+             "Include documentation from Ruby's standard",
+             "library.  Defaults to true.") do |value|
+        options[:use_system] = value
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]site",
+             "Include documentation from libraries",
+             "installed in site_lib.",
+             "Defaults to true.") do |value|
+        options[:use_site] = value
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]gems",
+             "Include documentation from RubyGems.",
+             "Defaults to true.") do |value|
+        options[:use_gems] = value
+      end
+
+      opt.separator nil
+
+      opt.on("--[no-]home",
+             "Include documentation stored in ~/.rdoc.",
+             "Defaults to true.") do |value|
+        options[:use_home] = value
+      end
+
+      opt.separator nil
+      opt.separator "Debug options:"
+      opt.separator nil
+
+      opt.on("--[no-]profile",
+             "Run with the ruby profiler") do |value|
+        options[:profile] = value
+      end
+
+      opt.separator nil
+
+      opt.on("--dump=CACHE", File,
+             "Dumps data from an ri cache or data file") do |value|
+        options[:dump_path] = value
+      end
+    end
+
+    argv = ENV['RI'].to_s.split.concat argv
+
+    opts.parse! argv
+
+    options[:names] = argv
+
+    options[:use_stdout] ||= !$stdout.tty?
+    options[:use_stdout] ||= options[:interactive]
+    options[:width] ||= 72
+
+    options
+
+  rescue OptionParser::InvalidArgument, OptionParser::InvalidOption => e
+    puts opts
+    puts
+    puts e
+    exit 1
+  end
+
+  ##
+  # Runs the ri command line executable using +argv+
+
+  def self.run argv = ARGV
+    options = process_args argv
+
+    if options[:dump_path] then
+      dump options[:dump_path]
+      return
+    end
+
+    ri = new options
+    ri.run
+  end
+
+  ##
+  # Creates a new driver using +initial_options+ from ::process_args
+
+  def initialize initial_options = {}
+    @paging = false
+    @classes = nil
+
+    options = self.class.default_options.update(initial_options)
+
+    @formatter_klass = options[:formatter]
+
+    require 'profile' if options[:profile]
+
+    @names = options[:names]
+    @list = options[:list]
+
+    @doc_dirs = []
+    @stores   = []
+
+    RDoc::RI::Paths.each(options[:use_system], options[:use_site],
+                         options[:use_home], options[:use_gems],
+                         *options[:extra_doc_dirs]) do |path, type|
+      @doc_dirs << path
+
+      store = RDoc::RI::Store.new path, type
+      store.load_cache
+      @stores << store
+    end
+
+    @list_doc_dirs = options[:list_doc_dirs]
+
+    @interactive = options[:interactive]
+    @server      = options[:server]
+    @use_stdout  = options[:use_stdout]
+    @show_all    = options[:show_all]
+
+    # pager process for jruby
+    @jruby_pager_process = nil
+  end
+
+  ##
+  # Adds paths for undocumented classes +also_in+ to +out+
+
+  def add_also_in out, also_in
+    return if also_in.empty?
+
+    out << RDoc::Markup::Rule.new(1)
+    out << RDoc::Markup::Paragraph.new("Also found in:")
+
+    paths = RDoc::Markup::Verbatim.new
+    also_in.each do |store|
+      paths.parts.push store.friendly_path, "\n"
+    end
+    out << paths
+  end
+
+  ##
+  # Adds a class header to +out+ for class +name+ which is described in
+  # +classes+.
+
+  def add_class out, name, classes
+    heading = if classes.all? { |klass| klass.module? } then
+                name
+              else
+                superclass = classes.map do |klass|
+                  klass.superclass unless klass.module?
+                end.compact.shift || 'Object'
+
+                superclass = superclass.full_name unless String === superclass
+
+                "#{name} < #{superclass}"
+              end
+
+    out << RDoc::Markup::Heading.new(1, heading)
+    out << RDoc::Markup::BlankLine.new
+  end
+
+  ##
+  # Adds "(from ...)" to +out+ for +store+
+
+  def add_from out, store
+    out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
+  end
+
+  ##
+  # Adds +extends+ to +out+
+
+  def add_extends out, extends
+    add_extension_modules out, 'Extended by', extends
+  end
+
+  ##
+  # Adds a list of +extensions+ to this module of the given +type+ to +out+.
+  # add_includes and add_extends call this, so you should use those directly.
+
+  def add_extension_modules out, type, extensions
+    return if extensions.empty?
+
+    out << RDoc::Markup::Rule.new(1)
+    out << RDoc::Markup::Heading.new(1, "#{type}:")
+
+    extensions.each do |modules, store|
+      if modules.length == 1 then
+        add_extension_modules_single out, store, modules.first
+      else
+        add_extension_modules_multiple out, store, modules
+      end
+    end
+  end
+
+  ##
+  # Renders multiple included +modules+ from +store+ to +out+.
+
+  def add_extension_modules_multiple out, store, modules # :nodoc:
+    out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
+
+    wout, with = modules.partition { |incl| incl.comment.empty? }
+
+    out << RDoc::Markup::BlankLine.new unless with.empty?
+
+    with.each do |incl|
+      out << RDoc::Markup::Paragraph.new(incl.name)
+      out << RDoc::Markup::BlankLine.new
+      out << incl.comment
+    end
+
+    unless wout.empty? then
+      verb = RDoc::Markup::Verbatim.new
+
+      wout.each do |incl|
+        verb.push incl.name, "\n"
+      end
+
+      out << verb
+    end
+  end
+
+  ##
+  # Adds a single extension module +include+ from +store+ to +out+
+
+  def add_extension_modules_single out, store, include # :nodoc:
+    name = include.name
+    path = store.friendly_path
+    out << RDoc::Markup::Paragraph.new("#{name} (from #{path})")
+
+    if include.comment then
+      out << RDoc::Markup::BlankLine.new
+      out << include.comment
+    end
+  end
+
+  ##
+  # Adds +includes+ to +out+
+
+  def add_includes out, includes
+    add_extension_modules out, 'Includes', includes
+  end
+
+  ##
+  # Looks up the method +name+ and adds it to +out+
+
+  def add_method out, name
+    filtered   = lookup_method name
+
+    method_out = method_document name, filtered
+
+    out.concat method_out.parts
+  end
+
+  ##
+  # Adds documentation for all methods in +klass+ to +out+
+
+  def add_method_documentation out, klass
+    klass.method_list.each do |method|
+      begin
+        add_method out, method.full_name
+      rescue NotFoundError
+        next
+      end
+    end
+  end
+
+  ##
+  # Adds a list of +methods+ to +out+ with a heading of +name+
+
+  def add_method_list out, methods, name
+    return if methods.empty?
+
+    out << RDoc::Markup::Heading.new(1, "#{name}:")
+    out << RDoc::Markup::BlankLine.new
+
+    if @use_stdout and !@interactive then
+      out.concat methods.map { |method|
+        RDoc::Markup::Verbatim.new method
+      }
+    else
+      out << RDoc::Markup::IndentedParagraph.new(2, methods.join(', '))
+    end
+
+    out << RDoc::Markup::BlankLine.new
+  end
+
+  ##
+  # Returns ancestor classes of +klass+
+
+  def ancestors_of klass
+    ancestors = []
+
+    unexamined = [klass]
+    seen = []
+
+    loop do
+      break if unexamined.empty?
+      current = unexamined.shift
+      seen << current
+
+      stores = classes[current]
+
+      break unless stores and not stores.empty?
+
+      klasses = stores.map do |store|
+        store.ancestors[current]
+      end.flatten.uniq
+
+      klasses = klasses - seen
+
+      ancestors.concat klasses
+      unexamined.concat klasses
+    end
+
+    ancestors.reverse
+  end
+
+  ##
+  # For RubyGems backwards compatibility
+
+  def class_cache # :nodoc:
+  end
+
+  ##
+  # Builds a RDoc::Markup::Document from +found+, +klasess+ and +includes+
+
+  def class_document name, found, klasses, includes, extends
+    also_in = []
+
+    out = RDoc::Markup::Document.new
+
+    add_class out, name, klasses
+
+    add_includes out, includes
+    add_extends  out, extends
+
+    found.each do |store, klass|
+      render_class out, store, klass, also_in
+    end
+
+    add_also_in out, also_in
+
+    out
+  end
+
+  ##
+  # Adds the class +comment+ to +out+.
+
+  def class_document_comment out, comment # :nodoc:
+    unless comment.empty? then
+      out << RDoc::Markup::Rule.new(1)
+
+      if comment.merged? then
+        parts = comment.parts
+        parts = parts.zip [RDoc::Markup::BlankLine.new] * parts.length
+        parts.flatten!
+        parts.pop
+
+        out.concat parts
+      else
+        out << comment
+      end
+    end
+  end
+
+  ##
+  # Adds the constants from +klass+ to the Document +out+.
+
+  def class_document_constants out, klass # :nodoc:
+    return if klass.constants.empty?
+
+    out << RDoc::Markup::Heading.new(1, "Constants:")
+    out << RDoc::Markup::BlankLine.new
+    list = RDoc::Markup::List.new :NOTE
+
+    constants = klass.constants.sort_by { |constant| constant.name }
+
+    list.items.concat constants.map { |constant|
+      parts = constant.comment.parts if constant.comment
+      parts << RDoc::Markup::Paragraph.new('[not documented]') if
+        parts.empty?
+
+      RDoc::Markup::ListItem.new(constant.name, *parts)
+    }
+
+    out << list
+    out << RDoc::Markup::BlankLine.new
+  end
+
+  ##
+  # Hash mapping a known class or module to the stores it can be loaded from
+
+  def classes
+    return @classes if @classes
+
+    @classes = {}
+
+    @stores.each do |store|
+      store.cache[:modules].each do |mod|
+        # using default block causes searched-for modules to be added
+        @classes[mod] ||= []
+        @classes[mod] << store
+      end
+    end
+
+    @classes
+  end
+
+  ##
+  # Returns the stores wherein +name+ is found along with the classes,
+  # extends and includes that match it
+
+  def classes_and_includes_and_extends_for name
+    klasses = []
+    extends = []
+    includes = []
+
+    found = @stores.map do |store|
+      begin
+        klass = store.load_class name
+        klasses  << klass
+        extends  << [klass.extends,  store] if klass.extends
+        includes << [klass.includes, store] if klass.includes
+        [store, klass]
+      rescue RDoc::Store::MissingFileError
+      end
+    end.compact
+
+    extends.reject!  do |modules,| modules.empty? end
+    includes.reject! do |modules,| modules.empty? end
+
+    [found, klasses, includes, extends]
+  end
+
+  ##
+  # Completes +name+ based on the caches.  For Readline
+
+  def complete name
+    completions = []
+
+    klass, selector, method = parse_name name
+
+    complete_klass  name, klass, selector, method, completions
+    complete_method name, klass, selector,         completions
+
+    completions.sort.uniq
+  end
+
+  def complete_klass name, klass, selector, method, completions # :nodoc:
+    klasses = classes.keys
+
+    # may need to include Foo when given Foo::
+    klass_name = method ? name : klass
+
+    if name !~ /#|\./ then
+      completions.replace klasses.grep(/^#{Regexp.escape klass_name}[^:]*$/)
+      completions.concat klasses.grep(/^#{Regexp.escape name}[^:]*$/) if
+        name =~ /::$/
+
+      completions << klass if classes.key? klass # to complete a method name
+    elsif selector then
+      completions << klass if classes.key? klass
+    elsif classes.key? klass_name then
+      completions << klass_name
+    end
+  end
+
+  def complete_method name, klass, selector, completions # :nodoc:
+    if completions.include? klass and name =~ /#|\.|::/ then
+      methods = list_methods_matching name
+
+      if not methods.empty? then
+        # remove Foo if given Foo:: and a method was found
+        completions.delete klass
+      elsif selector then
+        # replace Foo with Foo:: as given
+        completions.delete klass
+        completions << "#{klass}#{selector}"
+      end
+
+      completions.concat methods
+    end
+  end
+
+  ##
+  # Converts +document+ to text and writes it to the pager
+
+  def display document
+    page do |io|
+      text = document.accept formatter(io)
+
+      io.write text
+    end
+  end
+
+  ##
+  # Outputs formatted RI data for class +name+.  Groups undocumented classes
+
+  def display_class name
+    return if name =~ /#|\./
+
+    found, klasses, includes, extends =
+      classes_and_includes_and_extends_for name
+
+    return if found.empty?
+
+    out = class_document name, found, klasses, includes, extends
+
+    display out
+  end
+
+  ##
+  # Outputs formatted RI data for method +name+
+
+  def display_method name
+    out = RDoc::Markup::Document.new
+
+    add_method out, name
+
+    display out
+  end
+
+  ##
+  # Outputs formatted RI data for the class or method +name+.
+  #
+  # Returns true if +name+ was found, false if it was not an alternative could
+  # be guessed, raises an error if +name+ couldn't be guessed.
+
+  def display_name name
+    if name =~ /\w:(\w|$)/ then
+      display_page name
+      return true
+    end
+
+    return true if display_class name
+
+    display_method name if name =~ /::|#|\./
+
+    true
+  rescue NotFoundError
+    matches = list_methods_matching name if name =~ /::|#|\./
+    matches = classes.keys.grep(/^#{Regexp.escape name}/) if matches.empty?
+
+    raise if matches.empty?
+
+    page do |io|
+      io.puts "#{name} not found, maybe you meant:"
+      io.puts
+      io.puts matches.sort.join("\n")
+    end
+
+    false
+  end
+
+  ##
+  # Displays each name in +name+
+
+  def display_names names
+    names.each do |name|
+      name = expand_name name
+
+      display_name name
+    end
+  end
+
+  ##
+  # Outputs formatted RI data for page +name+.
+
+  def display_page name
+    store_name, page_name = name.split ':', 2
+
+    store = @stores.find { |s| s.source == store_name }
+
+    return display_page_list store if page_name.empty?
+
+    pages = store.cache[:pages]
+
+    unless pages.include? page_name then
+      found_names = pages.select do |n|
+        n =~ /#{Regexp.escape page_name}\.[^.]+$/
+      end
+
+      if found_names.length.zero? then
+        return display_page_list store, pages
+      elsif found_names.length > 1 then
+        return display_page_list store, found_names, page_name
+      end
+
+      page_name = found_names.first
+    end
+
+    page = store.load_page page_name
+
+    display page.comment
+  end
+
+  ##
+  # Outputs a formatted RI page list for the pages in +store+.
+
+  def display_page_list store, pages = store.cache[:pages], search = nil
+    out = RDoc::Markup::Document.new
+
+    title = if search then
+              "#{search} pages"
+            else
+              'Pages'
+            end
+
+    out << RDoc::Markup::Heading.new(1, "#{title} in #{store.friendly_path}")
+    out << RDoc::Markup::BlankLine.new
+
+    list = RDoc::Markup::List.new(:BULLET)
+
+    pages.each do |page|
+      list << RDoc::Markup::Paragraph.new(page)
+    end
+
+    out << list
+
+    display out
+  end
+
+  ##
+  # Expands abbreviated klass +klass+ into a fully-qualified class.  "Zl::Da"
+  # will be expanded to Zlib::DataError.
+
+  def expand_class klass
+    klass.split('::').inject '' do |expanded, klass_part|
+      expanded << '::' unless expanded.empty?
+      short = expanded << klass_part
+
+      subset = classes.keys.select do |klass_name|
+        klass_name =~ /^#{expanded}[^:]*$/
+      end
+
+      abbrevs = Abbrev.abbrev subset
+
+      expanded = abbrevs[short]
+
+      raise NotFoundError, short unless expanded
+
+      expanded.dup
+    end
+  end
+
+  ##
+  # Expands the class portion of +name+ into a fully-qualified class.  See
+  # #expand_class.
+
+  def expand_name name
+    klass, selector, method = parse_name name
+
+    return [selector, method].join if klass.empty?
+
+    case selector
+    when ':' then
+      [find_store(klass),   selector, method]
+    else
+      [expand_class(klass), selector, method]
+    end.join
+  end
+
+  ##
+  # Filters the methods in +found+ trying to find a match for +name+.
+
+  def filter_methods found, name
+    regexp = name_regexp name
+
+    filtered = found.find_all do |store, methods|
+      methods.any? { |method| method.full_name =~ regexp }
+    end
+
+    return filtered unless filtered.empty?
+
+    found
+  end
+
+  ##
+  # Yields items matching +name+ including the store they were found in, the
+  # class being searched for, the class they were found in (an ancestor) the
+  # types of methods to look up (from #method_type), and the method name being
+  # searched for
+
+  def find_methods name
+    klass, selector, method = parse_name name
+
+    types = method_type selector
+
+    klasses = nil
+    ambiguous = klass.empty?
+
+    if ambiguous then
+      klasses = classes.keys
+    else
+      klasses = ancestors_of klass
+      klasses.unshift klass
+    end
+
+    methods = []
+
+    klasses.each do |ancestor|
+      ancestors = classes[ancestor]
+
+      next unless ancestors
+
+      klass = ancestor if ambiguous
+
+      ancestors.each do |store|
+        methods << [store, klass, ancestor, types, method]
+      end
+    end
+
+    methods = methods.sort_by do |_, k, a, _, m|
+      [k, a, m].compact
+    end
+
+    methods.each do |item|
+      yield(*item) # :yields: store, klass, ancestor, types, method
+    end
+
+    self
+  end
+
+  ##
+  # Finds the given +pager+ for jruby.  Returns an IO if +pager+ was found.
+  #
+  # Returns false if +pager+ does not exist.
+  #
+  # Returns nil if the jruby JVM doesn't support ProcessBuilder redirection
+  # (1.6 and older).
+
+  def find_pager_jruby pager
+    require 'java'
+    require 'shellwords'
+
+    return nil unless java.lang.ProcessBuilder.constants.include? :Redirect
+
+    pager = Shellwords.split pager
+
+    pb = java.lang.ProcessBuilder.new(*pager)
+    pb = pb.redirect_output java.lang.ProcessBuilder::Redirect::INHERIT
+
+    @jruby_pager_process = pb.start
+
+    input = @jruby_pager_process.output_stream
+
+    io = input.to_io
+    io.sync = true
+    io
+  rescue java.io.IOException
+    false
+  end
+
+  ##
+  # Finds a store that matches +name+ which can be the name of a gem, "ruby",
+  # "home" or "site".
+  #
+  # See also RDoc::Store#source
+
+  def find_store name
+    @stores.each do |store|
+      source = store.source
+
+      return source if source == name
+
+      return source if
+        store.type == :gem and source =~ /^#{Regexp.escape name}-\d/
+    end
+
+    raise RDoc::RI::Driver::NotFoundError, name
+  end
+
+  ##
+  # Creates a new RDoc::Markup::Formatter.  If a formatter is given with -f,
+  # use it.  If we're outputting to a pager, use bs, otherwise ansi.
+
+  def formatter(io)
+    if @formatter_klass then
+      @formatter_klass.new
+    elsif paging? or !io.tty? then
+      RDoc::Markup::ToBs.new
+    else
+      RDoc::Markup::ToAnsi.new
+    end
+  end
+
+  ##
+  # Runs ri interactively using Readline if it is available.
+
+  def interactive
+    puts "\nEnter the method name you want to look up."
+
+    if defined? Readline then
+      Readline.completion_proc = method :complete
+      puts "You can use tab to autocomplete."
+    end
+
+    puts "Enter a blank line to exit.\n\n"
+
+    loop do
+      name = if defined? Readline then
+               Readline.readline ">> "
+             else
+               print ">> "
+               $stdin.gets
+             end
+
+      return if name.nil? or name.empty?
+
+      name = expand_name name.strip
+
+      begin
+        display_name name
+      rescue NotFoundError => e
+        puts e.message
+      end
+    end
+
+  rescue Interrupt
+    exit
+  end
+
+  ##
+  # Is +file+ in ENV['PATH']?
+
+  def in_path? file
+    return true if file =~ %r%\A/% and File.exist? file
+
+    ENV['PATH'].split(File::PATH_SEPARATOR).any? do |path|
+      File.exist? File.join(path, file)
+    end
+  end
+
+  ##
+  # Lists classes known to ri starting with +names+.  If +names+ is empty all
+  # known classes are shown.
+
+  def list_known_classes names = []
+    classes = []
+
+    stores.each do |store|
+      classes << store.module_names
+    end
+
+    classes = classes.flatten.uniq.sort
+
+    unless names.empty? then
+      filter = Regexp.union names.map { |name| /^#{name}/ }
+
+      classes = classes.grep filter
+    end
+
+    page do |io|
+      if paging? or io.tty? then
+        if names.empty? then
+          io.puts "Classes and Modules known to ri:"
+        else
+          io.puts "Classes and Modules starting with #{names.join ', '}:"
+        end
+        io.puts
+      end
+
+      io.puts classes.join("\n")
+    end
+  end
+
+  ##
+  # Returns an Array of methods matching +name+
+
+  def list_methods_matching name
+    found = []
+
+    find_methods name do |store, klass, ancestor, types, method|
+      if types == :instance or types == :both then
+        methods = store.instance_methods[ancestor]
+
+        if methods then
+          matches = methods.grep(/^#{Regexp.escape method.to_s}/)
+
+          matches = matches.map do |match|
+            "#{klass}##{match}"
+          end
+
+          found.concat matches
+        end
+      end
+
+      if types == :class or types == :both then
+        methods = store.class_methods[ancestor]
+
+        next unless methods
+        matches = methods.grep(/^#{Regexp.escape method.to_s}/)
+
+        matches = matches.map do |match|
+          "#{klass}::#{match}"
+        end
+
+        found.concat matches
+      end
+    end
+
+    found.uniq
+  end
+
+  ##
+  # Loads RI data for method +name+ on +klass+ from +store+.  +type+ and
+  # +cache+ indicate if it is a class or instance method.
+
+  def load_method store, cache, klass, type, name
+    methods = store.send(cache)[klass]
+
+    return unless methods
+
+    method = methods.find do |method_name|
+      method_name == name
+    end
+
+    return unless method
+
+    store.load_method klass, "#{type}#{method}"
+  rescue RDoc::Store::MissingFileError => e
+    comment = RDoc::Comment.new("missing documentation at #{e.file}").parse
+
+    method = RDoc::AnyMethod.new nil, name
+    method.comment = comment
+    method
+  end
+
+  ##
+  # Returns an Array of RI data for methods matching +name+
+
+  def load_methods_matching name
+    found = []
+
+    find_methods name do |store, klass, ancestor, types, method|
+      methods = []
+
+      methods << load_method(store, :class_methods, ancestor, '::',  method) if
+        [:class, :both].include? types
+
+      methods << load_method(store, :instance_methods, ancestor, '#',  method) if
+        [:instance, :both].include? types
+
+      found << [store, methods.compact]
+    end
+
+    found.reject do |path, methods| methods.empty? end
+  end
+
+  ##
+  # Returns a filtered list of methods matching +name+
+
+  def lookup_method name
+    found = load_methods_matching name
+
+    raise NotFoundError, name if found.empty?
+
+    filter_methods found, name
+  end
+
+  ##
+  # Builds a RDoc::Markup::Document from +found+, +klasses+ and +includes+
+
+  def method_document name, filtered
+    out = RDoc::Markup::Document.new
+
+    out << RDoc::Markup::Heading.new(1, name)
+    out << RDoc::Markup::BlankLine.new
+
+    filtered.each do |store, methods|
+      methods.each do |method|
+        render_method out, store, method, name
+      end
+    end
+
+    out
+  end
+
+  ##
+  # Returns the type of method (:both, :instance, :class) for +selector+
+
+  def method_type selector
+    case selector
+    when '.', nil then :both
+    when '#'      then :instance
+    else               :class
+    end
+  end
+
+  ##
+  # Returns a regular expression for +name+ that will match an
+  # RDoc::AnyMethod's name.
+
+  def name_regexp name
+    klass, type, name = parse_name name
+
+    case type
+    when '#', '::' then
+      /^#{klass}#{type}#{Regexp.escape name}$/
+    else
+      /^#{klass}(#|::)#{Regexp.escape name}$/
+    end
+  end
+
+  ##
+  # Paginates output through a pager program.
+
+  def page
+    if pager = setup_pager then
+      begin
+        yield pager
+      ensure
+        pager.close
+        @jruby_pager_process.wait_for if @jruby_pager_process
+      end
+    else
+      yield $stdout
+    end
+  rescue Errno::EPIPE
+  ensure
+    @paging = false
+  end
+
+  ##
+  # Are we using a pager?
+
+  def paging?
+    @paging
+  end
+
+  ##
+  # Extracts the class, selector and method name parts from +name+ like
+  # Foo::Bar#baz.
+  #
+  # NOTE: Given Foo::Bar, Bar is considered a class even though it may be a
+  # method
+
+  def parse_name name
+    parts = name.split(/(::?|#|\.)/)
+
+    if parts.length == 1 then
+      if parts.first =~ /^[a-z]|^([%&*+\/<>^`|~-]|\+@|-@|<<|<=>?|===?|=>|=~|>>|\[\]=?|~@)$/ then
+        type = '.'
+        meth = parts.pop
+      else
+        type = nil
+        meth = nil
+      end
+    elsif parts.length == 2 or parts.last =~ /::|#|\./ then
+      type = parts.pop
+      meth = nil
+    elsif parts[1] == ':' then
+      klass = parts.shift
+      type  = parts.shift
+      meth  = parts.join
+    elsif parts[-2] != '::' or parts.last !~ /^[A-Z]/ then
+      meth = parts.pop
+      type = parts.pop
+    end
+
+    klass ||= parts.join
+
+    [klass, type, meth]
+  end
+
+  ##
+  # Renders the +klass+ from +store+ to +out+.  If the klass has no
+  # documentable items the class is added to +also_in+ instead.
+
+  def render_class out, store, klass, also_in # :nodoc:
+    comment = klass.comment
+    # TODO the store's cache should always return an empty Array
+    class_methods    = store.class_methods[klass.full_name]    || []
+    instance_methods = store.instance_methods[klass.full_name] || []
+    attributes       = store.attributes[klass.full_name]       || []
+
+    if comment.empty? and
+       instance_methods.empty? and class_methods.empty? then
+      also_in << store
+      return
+    end
+
+    add_from out, store
+
+    class_document_comment out, comment
+
+    if class_methods or instance_methods or not klass.constants.empty? then
+      out << RDoc::Markup::Rule.new(1)
+    end
+
+    class_document_constants out, klass
+
+    add_method_list out, class_methods,    'Class methods'
+    add_method_list out, instance_methods, 'Instance methods'
+    add_method_list out, attributes,       'Attributes'
+
+    add_method_documentation out, klass if @show_all
+  end
+
+  def render_method out, store, method, name # :nodoc:
+    out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
+
+    unless name =~ /^#{Regexp.escape method.parent_name}/ then
+      out << RDoc::Markup::Heading.new(3, "Implementation from #{method.parent_name}")
+    end
+
+    out << RDoc::Markup::Rule.new(1)
+
+    render_method_arguments out, method.arglists
+    render_method_superclass out, method
+    render_method_comment out, method
+  end
+
+  def render_method_arguments out, arglists # :nodoc:
+    return unless arglists
+
+    arglists = arglists.chomp.split "\n"
+    arglists = arglists.map { |line| line + "\n" }
+    out << RDoc::Markup::Verbatim.new(*arglists)
+    out << RDoc::Markup::Rule.new(1)
+  end
+
+  def render_method_comment out, method # :nodoc:
+    out << RDoc::Markup::BlankLine.new
+    out << method.comment
+    out << RDoc::Markup::BlankLine.new
+  end
+
+  def render_method_superclass out, method # :nodoc:
+    return unless
+      method.respond_to?(:superclass_method) and method.superclass_method
+
+    out << RDoc::Markup::BlankLine.new
+    out << RDoc::Markup::Heading.new(4, "(Uses superclass method #{method.superclass_method})")
+    out << RDoc::Markup::Rule.new(1)
+  end
+
+  ##
+  # Looks up and displays ri data according to the options given.
+
+  def run
+    if @list_doc_dirs then
+      puts @doc_dirs
+    elsif @list then
+      list_known_classes @names
+    elsif @server then
+      start_server
+    elsif @interactive or @names.empty? then
+      interactive
+    else
+      display_names @names
+    end
+  rescue NotFoundError => e
+    abort e.message
+  end
+
+  ##
+  # Sets up a pager program to pass output through.  Tries the RI_PAGER and
+  # PAGER environment variables followed by pager, less then more.
+
+  def setup_pager
+    return if @use_stdout
+
+    jruby = Object.const_defined?(:RUBY_ENGINE) && RUBY_ENGINE == 'jruby'
+
+    pagers = [ENV['RI_PAGER'], ENV['PAGER'], 'pager', 'less', 'more']
+
+    pagers.compact.uniq.each do |pager|
+      next unless pager
+
+      pager_cmd = pager.split.first
+
+      next unless in_path? pager_cmd
+
+      if jruby then
+        case io = find_pager_jruby(pager)
+        when nil   then break
+        when false then next
+        else            io
+        end
+      else
+        io = IO.popen(pager, 'w') rescue next
+      end
+
+      next if $? and $?.pid == io.pid and $?.exited? # pager didn't work
+
+      @paging = true
+
+      return io
+    end
+
+    @use_stdout = true
+
+    nil
+  end
+
+  ##
+  # Starts a WEBrick server for ri.
+
+  def start_server
+    require 'webrick'
+
+    server = WEBrick::HTTPServer.new :Port => @server
+
+    extra_doc_dirs = @stores.map {|s| s.type == :extra ? s.path : nil}.compact
+
+    server.mount '/', RDoc::Servlet, nil, extra_doc_dirs
+
+    trap 'INT'  do server.shutdown end
+    trap 'TERM' do server.shutdown end
+
+    server.start
+  end
+
+end
+
diff --git a/jni/ruby/lib/rdoc/ri/formatter.rb b/jni/ruby/lib/rdoc/ri/formatter.rb
new file mode 100644
index 0000000..84d37a9
--- /dev/null
+++ b/jni/ruby/lib/rdoc/ri/formatter.rb
@@ -0,0 +1,5 @@
+##
+# For RubyGems backwards compatibility
+
+module RDoc::RI::Formatter # :nodoc:
+end
diff --git a/jni/ruby/lib/rdoc/ri/paths.rb b/jni/ruby/lib/rdoc/ri/paths.rb
new file mode 100644
index 0000000..970cb91
--- /dev/null
+++ b/jni/ruby/lib/rdoc/ri/paths.rb
@@ -0,0 +1,187 @@
+require 'rdoc/ri'
+
+##
+# The directories where ri data lives.  Paths can be enumerated via ::each, or
+# queried individually via ::system_dir, ::site_dir, ::home_dir and ::gem_dir.
+
+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
+
+  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:
+
+  ##
+  # 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 = true, site = true, home = true, gems = :latest, *extra_dirs # :yields: directory, type
+    return enum_for __method__, system, site, home, gems, *extra_dirs unless
+      block_given?
+
+    extra_dirs.each do |dir|
+      yield dir, :extra
+    end
+
+    yield system_dir,  :system if system
+    yield site_dir,    :site   if site
+    yield home_dir,    :home   if home and HOMEDIR
+
+    gemdirs(gems).each do |dir|
+      yield dir, :gem
+    end if gems
+
+    nil
+  end
+
+  ##
+  # The ri directory for the gem with +gem_name+.
+
+  def self.gem_dir name, version
+    req = Gem::Requirement.new "= #{version}"
+
+    spec = Gem::Specification.find_by_name name, req
+
+    File.join spec.doc_dir, 'ri'
+  end
+
+  ##
+  # The latest installed gems' ri directories.  +filter+ can be :all or
+  # :latest.
+  #
+  # A +filter+ :all includes all versions of gems and includes gems without
+  # ri documentation.
+
+  def self.gemdirs filter = :latest
+    require 'rubygems' unless defined?(Gem)
+
+    ri_paths = {}
+
+    all = Gem::Specification.map do |spec|
+      [File.join(spec.doc_dir, 'ri'), spec.name, spec.version]
+    end
+
+    if filter == :all then
+      gemdirs = []
+
+      all.group_by do |_, name, _|
+        name
+      end.sort_by do |group, _|
+        group
+      end.map do |group, items|
+        items.sort_by do |_, _, version|
+          version
+        end.reverse_each do |dir,|
+          gemdirs << dir
+        end
+      end
+
+      return gemdirs
+    end
+
+    all.each do |dir, name, ver|
+      next unless File.exist? dir
+
+      if ri_paths[name].nil? or ver > ri_paths[name].first then
+        ri_paths[name] = [ver, name, dir]
+      end
+    end
+
+    ri_paths.sort_by { |_, (_, name, _)| name }.map { |k, v| v.last }
+  rescue LoadError
+    []
+  end
+
+  ##
+  # The location of the rdoc data in the user's home directory.
+  #
+  # Like ::system, ri data in the user's home directory is rare and predates
+  # libraries distributed via RubyGems.  ri data is rarely generated into this
+  # directory.
+
+  def self.home_dir
+    HOMEDIR
+  end
+
+  ##
+  # Returns existing directories from the selected documentation directories
+  # as an Array.
+  #
+  # See also ::each
+
+  def self.path(system = true, site = true, home = true, gems = :latest, *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
+
+  ##
+  # The location of ri data installed into the site dir.
+  #
+  # Historically this was available for documentation installed by Ruby
+  # libraries predating RubyGems.  It is unlikely to contain any content for
+  # modern Ruby installations.
+
+  def self.site_dir
+    File.join BASE, 'site'
+  end
+
+  ##
+  # The location of the built-in ri data.
+  #
+  # This data is built automatically when `make` is run when Ruby is
+  # installed.  If you did not install Ruby by hand you may need to install
+  # the documentation yourself.  Please consult the documentation for your
+  # package manager or Ruby installer for details.  You can also use the
+  # rdoc-data gem to install system ri data for common versions of Ruby.
+
+  def self.system_dir
+    File.join BASE, 'system'
+  end
+
+end
+
diff --git a/jni/ruby/lib/rdoc/ri/store.rb b/jni/ruby/lib/rdoc/ri/store.rb
new file mode 100644
index 0000000..9fa9bbb
--- /dev/null
+++ b/jni/ruby/lib/rdoc/ri/store.rb
@@ -0,0 +1,6 @@
+module RDoc::RI
+
+  Store = RDoc::Store # :nodoc:
+
+end
+
diff --git a/jni/ruby/lib/rdoc/ri/task.rb b/jni/ruby/lib/rdoc/ri/task.rb
new file mode 100644
index 0000000..e545d4a
--- /dev/null
+++ b/jni/ruby/lib/rdoc/ri/task.rb
@@ -0,0 +1,71 @@
+require 'rubygems'
+begin
+  gem 'rdoc'
+rescue Gem::LoadError
+end unless defined?(RDoc)
+
+require 'rdoc/task'
+
+##
+# RDoc::RI::Task creates ri data in <code>./.rdoc</code> for your project.
+#
+# It contains the following tasks:
+#
+# [ri]
+#   Build ri data
+#
+# [clobber_ri]
+#   Delete ri data files.  This target is automatically added to the main
+#   clobber target.
+#
+# [reri]
+#   Rebuild the ri data from scratch even if they are not out of date.
+#
+# Simple example:
+#
+#   require 'rdoc/ri/task'
+#
+#   RDoc::RI::Task.new do |ri|
+#     ri.main = 'README.rdoc'
+#     ri.rdoc_files.include 'README.rdoc', 'lib/**/*.rb'
+#   end
+#
+# For further configuration details see RDoc::Task.
+
+class RDoc::RI::Task < RDoc::Task
+
+  DEFAULT_NAMES = { # :nodoc:
+    :clobber_rdoc => :clobber_ri,
+    :rdoc         => :ri,
+    :rerdoc       => :reri,
+  }
+
+  ##
+  # Create an ri task with the given name. See RDoc::Task for documentation on
+  # setting names.
+
+  def initialize name = DEFAULT_NAMES # :yield: self
+    super
+  end
+
+  def clobber_task_description # :nodoc:
+    "Remove RI data files"
+  end
+
+  ##
+  # Sets default task values
+
+  def defaults
+    super
+
+    @rdoc_dir = '.rdoc'
+  end
+
+  def rdoc_task_description # :nodoc:
+    'Build RI data files'
+  end
+
+  def rerdoc_task_description # :nodoc:
+    'Rebuild RI data files'
+  end
+end