class RDoc::RI::Driver
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
Attributes
Show all method documentation following a class or module
An RDoc::RI::Store for each entry in the RI path
Controls the user of the pager vs $stdout
Public Class Methods
Default options for ri
# File lib/rdoc/ri/driver.rb, line 77 def self.default_options options = {} options[:interactive] = false options[:profile] = false options[:show_all] = false options[:use_cache] = true options[:use_stdout] = !$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
using pp
# 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
Creates a new driver using initial_options
from ::process_args
# 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
Parses argv
and returns a Hash
of options
# 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
Runs the ri command line executable using argv
# 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
Public Instance Methods
Adds paths for undocumented classes also_in
to
out
# 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
Adds a class header to out
for class name
which
is described in classes
.
# 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
Adds extends
to out
# File lib/rdoc/ri/driver.rb, line 453 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.
# 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
Adds “(from …)” to out
for store
# File lib/rdoc/ri/driver.rb, line 446 def add_from out, store out << RDoc::Markup::Paragraph.new("(from #{store.friendly_path})") end
Adds includes
to out
# File lib/rdoc/ri/driver.rb, line 520 def add_includes out, includes add_extension_modules out, 'Includes', includes end
Looks up the method name
and adds it to out
# 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
Adds documentation for all methods in klass
to
out
# 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
Adds a list of methods
to out
with a heading of
name
# 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
Returns ancestor classes of klass
# 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
Builds a RDoc::Markup::Document from
found
, klasess
and includes
# 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
Hash mapping a known class or module to the stores it can be loaded from
# 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
Returns the stores wherein name
is found along with the
classes, extends and includes that match it
# 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
Completes name
based on the caches. For Readline
# 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
Converts document
to text and writes it to the pager
# File lib/rdoc/ri/driver.rb, line 769 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
# 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
Outputs formatted RI data for method name
# File lib/rdoc/ri/driver.rb, line 796 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.
# 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
Displays each name in name
# 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
Outputs formatted RI data for page name
.
# 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}\.[^.]+$/ end if found_names.length.zero? then return display_page_list store, pages elsif found_names.length > 1 then return display_page_list store, found_names, page_name end page_name = found_names.first end page = store.load_page page_name display page.comment end
Outputs a formatted RI page list for the pages in store
.
# File lib/rdoc/ri/driver.rb, line 881 def display_page_list store, pages = store.cache[:pages], search = nil out = RDoc::Markup::Document.new title = if search then "#{search} pages" else 'Pages' end out << RDoc::Markup::Heading.new(1, "#{title} in #{store.friendly_path}") out << RDoc::Markup::BlankLine.new list = RDoc::Markup::List.new(:BULLET) pages.each do |page| list << RDoc::Markup::Paragraph.new(page) end out << list display out end
Expands abbreviated klass klass
into a fully-qualified class.
“Zl::Da” will be expanded to Zlib::DataError.
# File lib/rdoc/ri/driver.rb, line 908 def expand_class klass klass.split('::').inject '' do |expanded, klass_part| expanded << '::' unless expanded.empty? short = expanded << klass_part subset = classes.keys.select do |klass_name| klass_name =~ /^#{expanded}[^:]*$/ end abbrevs = Abbrev.abbrev subset expanded = abbrevs[short] raise NotFoundError, short unless expanded expanded.dup end end
Expands the class portion of name
into a fully-qualified
class. See expand_class.
# 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
Filters the methods in found
trying to find a match for
name
.
# 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
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
# 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
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).
# 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
Finds a store that matches name
which can be the name of a
gem, “ruby”, “home” or “site”.
See also RDoc::Store#source
# 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
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.
# 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
Is file
in ENV?
# 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
Runs ri interactively using Readline if it is available.
# 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
Lists classes known to ri starting with names
. If
names
is empty all known classes are shown.
# 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
Returns an Array of methods matching name
# 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
Loads RI data for method name
on klass
from
store
. type
and cache
indicate if
it is a class or instance method.
# 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
Returns an Array of RI data for methods matching name
# 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
Returns a filtered list of methods matching name
# 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
Builds a RDoc::Markup::Document from
found
, klasses
and includes
# 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
Returns the type of method (:both, :instance, :class) for
selector
# 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
Returns a regular expression for name
that will match an
RDoc::AnyMethod's name.
# 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
Paginates output through a pager program.
# 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
Are we using a pager?
# File lib/rdoc/ri/driver.rb, line 1308 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
# 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
Looks up and displays ri data according to the options given.
# 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
Sets up a pager program to pass output through. Tries the RI_PAGER and PAGER environment variables followed by pager, less then more.
# 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
Starts a WEBrick server for ri.
# 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