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require 'abbrev'
require 'optparse'
begin
require 'readline'
rescue LoadError
end
begin
require 'win32console'
rescue LoadError
end
require 'rdoc/ri'
require 'rdoc/ri/paths'
require 'rdoc/markup'
require 'rdoc/markup/formatter'
require 'rdoc/text'
##
# 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
##
# An RDoc::RI::Store for each entry in the RI path
attr_accessor :stores
##
# Controls the user of the pager vs $stdout
attr_accessor :use_stdout
##
# Default options for ri
def self.default_options
options = {}
options[:use_stdout] = !$stdout.tty?
options[:width] = 72
options[:interactive] = false
options[:use_cache] = true
options[:profile] = false
# 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 $0
opt.version = RDoc::VERSION
opt.release = nil
opt.summary_indent = ' ' * 4
opt.banner = <<-EOT
Usage: #{opt.program_name} [options] [names...]
Where name can be:
Class | Class::method | Class#method | Class.method | method
All class names may be abbreviated to their minimum unambiguous form. If a name
is ambiguous, all valid options will be listed.
A '.' matches either class or instance methods, while #method
matches only instance and ::method matches only class methods.
For example:
#{opt.program_name} Fil
#{opt.program_name} File
#{opt.program_name} File.new
#{opt.program_name} zip
Note that shell quoting or escaping may be required for method names containing
punctuation:
#{opt.program_name} 'Array.[]'
#{opt.program_name} compact\\!
To see the default directories ri will search, run:
#{opt.program_name} --list-doc-dirs
Specifying the --system, --site, --home, --gems or --doc-dir options will
limit ri to searching only the specified directories.
Options may also be set in the 'RI' environment variable.
EOT
opt.separator nil
opt.separator "Options:"
opt.separator nil
formatters = RDoc::Markup.constants.grep(/^To[A-Z][a-z]+$/).sort
formatters = formatters.sort.map do |formatter|
formatter.to_s.sub('To', '').downcase
end
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.on("--no-pager", "-T",
"Send output directly to stdout,",
"rather than to a pager.") do
options[:use_stdout] = true
end
opt.separator nil
opt.on("--width=WIDTH", "-w", OptionParser::DecimalInteger,
"Set the width of the output.") do |value|
options[:width] = value
end
opt.separator nil
opt.on("--interactive", "-i",
"In interactive mode you can repeatedly",
"look up methods with autocomplete.") do
options[:interactive] = true
end
opt.separator nil
opt.on("--list", "-l",
"List classes ri knows about.") do
options[:list] = true
end
opt.separator nil
opt.on("--[no-]profile",
"Run with the ruby profiler") do |value|
options[:profile] = value
end
opt.separator nil
opt.separator "Data source options:"
opt.separator nil
opt.on("--list-doc-dirs",
"List the directories from which ri will",
"source documentation on stdout and exit.") do
options[:list_doc_dirs] = true
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("--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]
@use_stdout = options[:use_stdout]
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 +includes+ to +out+
def add_includes out, includes
return if includes.empty?
out << RDoc::Markup::Rule.new(1)
out << RDoc::Markup::Heading.new(1, "Includes:")
includes.each do |modules, store|
if modules.length == 1 then
include = modules.first
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
else
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
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
out.push(*methods.map do |method|
RDoc::Markup::Verbatim.new method
end)
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.push(*klasses)
unexamined.push(*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
also_in = []
out = RDoc::Markup::Document.new
add_class out, name, klasses
add_includes out, includes
found.each do |store, klass|
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
next
end
add_from out, store
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.push(*parts)
else
out << comment
end
end
if class_methods or instance_methods or not klass.constants.empty? then
out << RDoc::Markup::Rule.new(1)
end
unless klass.constants.empty? then
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.push(*constants.map do |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)
end)
out << list
out << RDoc::Markup::BlankLine.new
end
add_method_list out, class_methods, 'Class methods'
add_method_list out, instance_methods, 'Instance methods'
add_method_list out, attributes, 'Attributes'
end
add_also_in out, also_in
out
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 wherin +name+ is found along with the classes and
# includes that match it
def classes_and_includes_for name
klasses = []
includes = []
found = @stores.map do |store|
begin
klass = store.load_class name
klasses << klass
includes << [klass.includes, store] if klass.includes
[store, klass]
rescue Errno::ENOENT
end
end.compact
includes.reject! do |modules,| modules.empty? end
[found, klasses, includes]
end
##
# Completes +name+ based on the caches. For Readline
def complete name
klasses = classes.keys
completions = []
klass, selector, method = parse_name name
# may need to include Foo when given Foo::
klass_name = method ? name : klass
if name !~ /#|\./ then
completions = 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
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.push(*methods)
end
completions.sort.uniq
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 = classes_and_includes_for name
return if found.empty?
out = class_document name, found, klasses, includes
display out
end
##
# Outputs formatted RI data for method +name+
def display_method name
found = load_methods_matching name
raise NotFoundError, name if found.empty?
filtered = filter_methods found, name
out = method_document name, filtered
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
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(/^#{name}/) if matches.empty?
raise if matches.empty?
page do |io|
io.puts "#{name} not found, maybe you meant:"
io.puts
io.puts matches.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
##
# 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?
"#{expand_class klass}#{selector}#{method}"
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
##
# 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.modules
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.push(*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.push(*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}"
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
##
# Builds a RDoc::Markup::Document from +found+, +klasess+ 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|
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)
if method.arglists then
arglists = method.arglists.chomp.split "\n"
arglists = arglists.map { |line| line + "\n" }
out << RDoc::Markup::Verbatim.new(*arglists)
out << RDoc::Markup::Rule.new(1)
end
out << RDoc::Markup::BlankLine.new
out << method.comment
out << RDoc::Markup::BlankLine.new
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
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[-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.
def run
if @list_doc_dirs then
puts @doc_dirs
elsif @list then
list_known_classes @names
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
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
io = IO.popen(pager, 'w') rescue next
next if $? and $?.exited? # pager didn't work
@paging = true
return io
end
@use_stdout = true
nil
end
end