Class: RDoc::RI::Driver

Inherits:
Object
  • Object
show all
Defined in:
lib/rdoc/ri/driver.rb

Overview

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

Defined Under Namespace

Classes: Error, NotFoundError

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(initial_options = {}) ⇒ Driver

Creates a new driver using initial_options from ::process_args



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# File 'lib/rdoc/ri/driver.rb', line 369

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

Instance Attribute Details

#show_all ⇒ Object

Show all method documentation following a class or module



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# File 'lib/rdoc/ri/driver.rb', line 62

def show_all
  @show_all
end

#stores ⇒ Object

An RDoc::RI::Store for each entry in the RI path



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# File 'lib/rdoc/ri/driver.rb', line 67

def stores
  @stores
end

#use_stdout ⇒ Object

Controls the user of the pager vs $stdout



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# File 'lib/rdoc/ri/driver.rb', line 72

def use_stdout
  @use_stdout
end

Class Method Details

.default_options ⇒ Object

Default options for ri



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# File 'lib/rdoc/ri/driver.rb', line 77

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) ⇒ Object

Dump data_path using pp



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# File 'lib/rdoc/ri/driver.rb', line 99

def self.dump data_path
  require 'pp'

  open data_path, 'rb' do |io|
    pp Marshal.load(io.read)
  end
end

.process_args(argv) ⇒ Object

Parses argv and returns a Hash of options



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# File 'lib/rdoc/ri/driver.rb', line 110

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

.run(argv = ARGV) ⇒ Object

Runs the ri command line executable using argv



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# File 'lib/rdoc/ri/driver.rb', line 354

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

Instance Method Details

#add_also_in(out, also_in) ⇒ Object

Adds paths for undocumented classes also_in to out



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# File 'lib/rdoc/ri/driver.rb', line 409

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

#add_class(out, name, classes) ⇒ Object

Adds a class header to out for class name which is described in classes.



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# File 'lib/rdoc/ri/driver.rb', line 426

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

#add_extends(out, extends) ⇒ Object

Adds extends to out



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# File 'lib/rdoc/ri/driver.rb', line 453

def add_extends out, extends
  add_extension_modules out, 'Extended by', extends
end

#add_extension_modules(out, type, extensions) ⇒ Object

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.



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# File 'lib/rdoc/ri/driver.rb', line 461

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

#add_extension_modules_multiple(out, store, modules) ⇒ Object

Renders multiple included modules from store to out.



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# File 'lib/rdoc/ri/driver.rb', line 479

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

#add_extension_modules_single(out, store, include) ⇒ Object

Adds a single extension module include from store to out



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# File 'lib/rdoc/ri/driver.rb', line 506

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

#add_from(out, store) ⇒ Object

Adds “(from …)” to out for store



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# File 'lib/rdoc/ri/driver.rb', line 446

def add_from out, store
  out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})")
end

#add_includes(out, includes) ⇒ Object

Adds includes to out



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# File 'lib/rdoc/ri/driver.rb', line 520

def add_includes out, includes
  add_extension_modules out, 'Includes', includes
end

#add_method(out, name) ⇒ Object

Looks up the method name and adds it to out



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# File 'lib/rdoc/ri/driver.rb', line 527

def add_method out, name
  filtered   = lookup_method name

  method_out = method_document name, filtered

  out.concat method_out.parts
end

#add_method_documentation(out, klass) ⇒ Object

Adds documentation for all methods in klass to out



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# File 'lib/rdoc/ri/driver.rb', line 538

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

#add_method_list(out, methods, name) ⇒ Object

Adds a list of methods to out with a heading of name



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# File 'lib/rdoc/ri/driver.rb', line 551

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

#ancestors_of(klass) ⇒ Object

Returns ancestor classes of klass



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# File 'lib/rdoc/ri/driver.rb', line 571

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

#class_cache ⇒ Object

For RubyGems backwards compatibility



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# File 'lib/rdoc/ri/driver.rb', line 602

def class_cache # :nodoc:
end

#class_document(name, found, klasses, includes, extends) ⇒ Object

Builds a RDoc::Markup::Document from found, klasess and includes



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# File 'lib/rdoc/ri/driver.rb', line 608

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

#class_document_comment(out, comment) ⇒ Object

Adds the class comment to out.



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# File 'lib/rdoc/ri/driver.rb', line 630

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

#class_document_constants(out, klass) ⇒ Object

Adds the constants from klass to the Document out.



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# File 'lib/rdoc/ri/driver.rb', line 650

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

#classes ⇒ Object

Hash mapping a known class or module to the stores it can be loaded from



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# File 'lib/rdoc/ri/driver.rb', line 674

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

#classes_and_includes_and_extends_for(name) ⇒ Object

Returns the stores wherein name is found along with the classes, extends and includes that match it



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# File 'lib/rdoc/ri/driver.rb', line 694

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

#complete(name) ⇒ Object

Completes name based on the caches. For Readline



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# File 'lib/rdoc/ri/driver.rb', line 719

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

#complete_klass(name, klass, selector, method, completions) ⇒ Object

:nodoc:



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# File 'lib/rdoc/ri/driver.rb', line 730

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

#complete_method(name, klass, selector, completions) ⇒ Object

:nodoc:



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# File 'lib/rdoc/ri/driver.rb', line 749

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

#display(document) ⇒ Object

Converts document to text and writes it to the pager



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# File 'lib/rdoc/ri/driver.rb', line 769

def display document
  page do |io|
    text = document.accept formatter(io)

    io.write text
  end
end

#display_class(name) ⇒ Object

Outputs formatted RI data for class name. Groups undocumented classes



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# File 'lib/rdoc/ri/driver.rb', line 780

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

#display_method(name) ⇒ Object

Outputs formatted RI data for method name



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# File 'lib/rdoc/ri/driver.rb', line 796

def display_method name
  out = RDoc::Markup::Document.new

  add_method out, name

  display out
end

#display_name(name) ⇒ Object

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.



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# File 'lib/rdoc/ri/driver.rb', line 810

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

#display_names(names) ⇒ Object

Displays each name in name



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# File 'lib/rdoc/ri/driver.rb', line 839

def display_names names
  names.each do |name|
    name = expand_name name

    display_name name
  end
end

#display_page(name) ⇒ Object

Outputs formatted RI data for page name.



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# File 'lib/rdoc/ri/driver.rb', line 850

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

#display_page_list(store, pages = , search = nil) ⇒ Object

Outputs a formatted RI page list for the pages in store.



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# File 'lib/rdoc/ri/driver.rb', line 881

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

#expand_class(klass) ⇒ Object

Expands abbreviated klass klass into a fully-qualified class. “Zl::Da” will be expanded to Zlib::DataError.



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# File 'lib/rdoc/ri/driver.rb', line 908

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

#expand_name(name) ⇒ Object

Expands the class portion of name into a fully-qualified class. See #expand_class.



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# File 'lib/rdoc/ri/driver.rb', line 931

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

#filter_methods(found, name) ⇒ Object

Filters the methods in found trying to find a match for name.



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# File 'lib/rdoc/ri/driver.rb', line 947

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

#find_methods(name) ⇒ Object

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



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# File 'lib/rdoc/ri/driver.rb', line 965

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

#find_pager_jruby(pager) ⇒ Object

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).



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# File 'lib/rdoc/ri/driver.rb', line 1013

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

#find_store(name) ⇒ Object

Finds a store that matches name which can be the name of a gem, “ruby”, “home” or “site”.

See also RDoc::Store#source

Raises:



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# File 'lib/rdoc/ri/driver.rb', line 1041

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

#formatter(io) ⇒ Object

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.



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# File 'lib/rdoc/ri/driver.rb', line 1058

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

#in_path?(file) ⇒ Boolean

Is file in ENV?

Returns:

  • (Boolean) 


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# File 'lib/rdoc/ri/driver.rb', line 1107

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

#interactive ⇒ Object

Runs ri interactively using Readline if it is available.



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# File 'lib/rdoc/ri/driver.rb', line 1071

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

#list_known_classes(names = []) ⇒ Object

Lists classes known to ri starting with names. If names is empty all known classes are shown.



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# File 'lib/rdoc/ri/driver.rb', line 1119

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

#list_methods_matching(name) ⇒ Object

Returns an Array of methods matching name



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# File 'lib/rdoc/ri/driver.rb', line 1151

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

#load_method(store, cache, klass, type, name) ⇒ Object

Loads RI data for method name on klass from store. type and cache indicate if it is a class or instance method.



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# File 'lib/rdoc/ri/driver.rb', line 1190

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

#load_methods_matching(name) ⇒ Object

Returns an Array of RI data for methods matching name



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# File 'lib/rdoc/ri/driver.rb', line 1213

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

#lookup_method(name) ⇒ Object

Returns a filtered list of methods matching name

Raises:



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# File 'lib/rdoc/ri/driver.rb', line 1234

def lookup_method name
  found = load_methods_matching name

  raise NotFoundError, name if found.empty?

  filter_methods found, name
end

#method_document(name, filtered) ⇒ Object

Builds a RDoc::Markup::Document from found, klasses and includes



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# File 'lib/rdoc/ri/driver.rb', line 1245

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

#method_type(selector) ⇒ Object

Returns the type of method (:both, :instance, :class) for selector



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# File 'lib/rdoc/ri/driver.rb', line 1263

def method_type selector
  case selector
  when '.', nil then :both
  when '#'      then :instance
  else               :class
  end
end

#name_regexp(name) ⇒ Object

Returns a regular expression for name that will match an RDoc::AnyMethod’s name.



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# File 'lib/rdoc/ri/driver.rb', line 1275

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

#page ⇒ Object

Paginates output through a pager program.



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# File 'lib/rdoc/ri/driver.rb', line 1289

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

#paging? ⇒ Boolean

Are we using a pager?

Returns:

  • (Boolean) 


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# File 'lib/rdoc/ri/driver.rb', line 1308

def paging?
  @paging
end

#parse_name(name) ⇒ Object

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



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# File 'lib/rdoc/ri/driver.rb', line 1319

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

#render_class(out, store, klass, also_in) ⇒ Object

Renders the klass from store to out. If the klass has no documentable items the class is added to also_in instead.



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# File 'lib/rdoc/ri/driver.rb', line 1351

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

#render_method(out, store, method, name) ⇒ Object

:nodoc:



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# File 'lib/rdoc/ri/driver.rb', line 1381

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

#render_method_arguments(out, arglists) ⇒ Object

:nodoc:



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# File 'lib/rdoc/ri/driver.rb', line 1395

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

#render_method_comment(out, method) ⇒ Object

:nodoc:



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# File 'lib/rdoc/ri/driver.rb', line 1404

def render_method_comment out, method # :nodoc:
  out << RDoc::Markup::BlankLine.new
  out << method.comment
  out << RDoc::Markup::BlankLine.new
end

#render_method_superclass(out, method) ⇒ Object

:nodoc:



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# File 'lib/rdoc/ri/driver.rb', line 1410

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

#run ⇒ Object

Looks up and displays ri data according to the options given.



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# File 'lib/rdoc/ri/driver.rb', line 1422

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

#setup_pager ⇒ Object

Sets up a pager program to pass output through. Tries the RI_PAGER and PAGER environment variables followed by pager, less then more.



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# File 'lib/rdoc/ri/driver.rb', line 1442

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

#start_server ⇒ Object

Starts a WEBrick server for ri.



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# File 'lib/rdoc/ri/driver.rb', line 1481

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