class RDoc::RDoc

This is the driver for generating RDoc output. It handles file parsing and generation of output.

To use this class to generate RDoc output via the API, the recommended way is:

rdoc = RDoc::RDoc.new
options = RDoc::Options.load_options # returns an RDoc::Options instance
# set extra options
rdoc.document options

You can also generate output like the rdoc executable:

rdoc = RDoc::RDoc.new
rdoc.document argv

Where argv is an array of strings, each corresponding to an argument you’d give rdoc on the command line. See rdoc --help for details.

Constants

GENERATORS: This is the list of supported output generators
TEST_SUITE_DIRECTORY_NAMES: List of directory names skipped if test suites should be skipped
UNCONDITIONALLY_SKIPPED_DIRECTORIES: List of directory names always skipped

Attributes

generator [RW]

Generator instance used for creating output

last_modified [R]

Hash of files and their last modified times.

options [RW]

RDoc options

stats [R]

Accessor for statistics. Available after each call to parse_files

store [R]

The current documentation store

Public Class Methods

add_generator (klass)

Add klass that can generate output after parsing

# File lib/rdoc/rdoc.rb, line 77
def self.add_generator(klass)
  name = klass.name.sub(/^RDoc::Generator::/, '').downcase
  GENERATORS[name] = klass
end

current ()

Active RDoc::RDoc instance

# File lib/rdoc/rdoc.rb, line 85
def self.current
  @current
end

current= (rdoc)

Sets the active RDoc::RDoc instance

# File lib/rdoc/rdoc.rb, line 92
def self.current= rdoc
  @current = rdoc
end

new ()

Creates a new RDoc::RDoc instance. Call document to parse files and generate documentation.

# File lib/rdoc/rdoc.rb, line 100
def initialize
  @current       = nil
  @generator     = nil
  @last_modified = {}
  @old_siginfo   = nil
  @options       = nil
  @stats         = nil
  @store         = nil
end

Public Instance Methods

document (options)

Generates documentation or a coverage report depending upon the settings in options.

options can be either an RDoc::Options instance or an array of strings equivalent to the strings that would be passed on the command line like %w[-q -o doc -t My\ Doc\ Title]. document will automatically call RDoc::Options#finish if an options instance was given.

For a list of options, see either RDoc::Options or rdoc --help.

By default, output will be stored in a directory called “doc” below the current directory, so make sure you’re somewhere writable before invoking.

# File lib/rdoc/rdoc.rb, line 450
def document options
  self.store = RDoc::Store.new

  if RDoc::Options === options then
    @options = options
  else
    @options = RDoc::Options.load_options
    @options.parse options
  end
  @options.finish

  if @options.pipe then
    handle_pipe
    exit
  end

  unless @options.coverage_report then
    @last_modified = setup_output_dir @options.op_dir, @options.force_update
  end

  @store.encoding = @options.encoding
  @store.dry_run  = @options.dry_run
  @store.main     = @options.main_page
  @store.title    = @options.title
  @store.path     = @options.op_dir

  @start_time = Time.now

  @store.load_cache

  file_info = parse_files @options.files

  @options.default_title = "RDoc Documentation"

  @store.complete @options.visibility

  @stats.coverage_level = @options.coverage_report

  if @options.coverage_report then
    puts

    puts @stats.report.accept RDoc::Markup::ToRdoc.new
  elsif file_info.empty? then
    $stderr.puts "\nNo newer files." unless @options.quiet
  else
    gen_klass = @options.generator

    @generator = gen_klass.new @store, @options

    generate
  end

  if @stats and (@options.coverage_report or not @options.quiet) then
    puts
    puts @stats.summary.accept RDoc::Markup::ToRdoc.new
  end

  exit @stats.fully_documented? if @options.coverage_report
end

error (msg)

Report an error message and exit

# File lib/rdoc/rdoc.rb, line 113
def error(msg)
  raise RDoc::Error, msg
end

gather_files (files)

Gathers a set of parseable files from the files and directories listed in files.

# File lib/rdoc/rdoc.rb, line 121
def gather_files files
  files = [@options.root.to_s] if files.empty?

  file_list = normalized_file_list files, true, @options.exclude

  file_list = remove_unparseable(file_list)

  if file_list.count {|name, mtime|
       file_list[name] = @last_modified[name] unless mtime
       mtime
     } > 0
    @last_modified.replace file_list
    file_list.keys.sort
  else
    []
  end
end

generate ()

Generates documentation for file_info (from parse_files) into the output dir using the generator selected by the RDoc options

# File lib/rdoc/rdoc.rb, line 515
def generate
  if @options.dry_run then
    # do nothing
    @generator.generate
  else
    Dir.chdir @options.op_dir do
      unless @options.quiet then
        $stderr.puts "\nGenerating #{@generator.class.name.sub(/^.*::/, '')} format into #{Dir.pwd}..."
        $stderr.puts "\nYou can visit the home page at: \e]8;;file://#{Dir.pwd}/index.html\e\\file://#{Dir.pwd}/index.html\e]8;;\e\\"
      end

      @generator.generate
      update_output_dir '.', @start_time, @last_modified
    end
  end
end

handle_pipe ()

Turns RDoc from stdin into HTML

# File lib/rdoc/rdoc.rb, line 142
def handle_pipe
  @html = RDoc::Markup::ToHtml.new @options

  parser = RDoc::Text::MARKUP_FORMAT[@options.markup]

  document = parser.parse $stdin.read

  out = @html.convert document

  $stdout.write out
end

install_siginfo_handler ()

Installs a siginfo handler that prints the current filename.

# File lib/rdoc/rdoc.rb, line 157
def install_siginfo_handler
  return unless Signal.list.include? 'INFO'

  @old_siginfo = trap 'INFO' do
    puts @current if @current
  end
end

list_files_in_directory (dir)

Return a list of the files to be processed in a directory. We know that this directory doesn’t have a .document file, so we’re looking for real files. However we may well contain subdirectories which must be tested for .document files.

# File lib/rdoc/rdoc.rb, line 323
def list_files_in_directory dir
  files = Dir.glob File.join(dir, "*")

  normalized_file_list files, false, @options.exclude
end

normalized_file_list (relative_files, force_doc = false, exclude_pattern = nil)

Given a list of files and directories, create a list of all the Ruby files they contain.

If force_doc is true we always add the given files, if false, only add files that we guarantee we can parse. It is true when looking at files given on the command line, false when recursing through subdirectories.

The effect of this is that if you want a file with a non-standard extension parsed, you must name it explicitly.

# File lib/rdoc/rdoc.rb, line 275
def normalized_file_list(relative_files, force_doc = false,
                         exclude_pattern = nil)
  file_list = {}

  relative_files.each do |rel_file_name|
    rel_file_name = rel_file_name.sub(/^\.\//, '')
    next if rel_file_name.end_with? 'created.rid'
    next if exclude_pattern && exclude_pattern =~ rel_file_name
    stat = File.stat rel_file_name rescue next

    case type = stat.ftype
    when "file" then
      mtime = (stat.mtime unless (last_modified = @last_modified[rel_file_name] and
                                  stat.mtime.to_i <= last_modified.to_i))

      if force_doc or RDoc::Parser.can_parse(rel_file_name) then
        file_list[rel_file_name] = mtime
      end
    when "directory" then
      next if UNCONDITIONALLY_SKIPPED_DIRECTORIES.include?(rel_file_name)

      basename = File.basename(rel_file_name)
      next if options.skip_tests && TEST_SUITE_DIRECTORY_NAMES.include?(basename)

      created_rid = File.join rel_file_name, "created.rid"
      next if File.file? created_rid

      dot_doc = File.join rel_file_name, RDoc::DOT_DOC_FILENAME

      if File.file? dot_doc then
        file_list.update(parse_dot_doc_file(rel_file_name, dot_doc))
      else
        file_list.update(list_files_in_directory(rel_file_name))
      end
    else
      warn "rdoc can't parse the #{type} #{rel_file_name}"
    end
  end

  file_list
end

output_flag_file (op_dir)

Return the path name of the flag file in an output directory.

# File lib/rdoc/rdoc.rb, line 240
def output_flag_file(op_dir)
  File.join op_dir, "created.rid"
end

parse_dot_doc_file (in_dir, filename)

The .document file contains a list of file and directory name patterns, representing candidates for documentation. It may also contain comments (starting with ‘#’)

# File lib/rdoc/rdoc.rb, line 249
def parse_dot_doc_file in_dir, filename
  # read and strip comments
  patterns = File.read(filename).gsub(/#.*/, '')

  result = {}

  patterns.split(' ').each do |patt|
    candidates = Dir.glob(File.join(in_dir, patt))
    result.update normalized_file_list(candidates, false, @options.exclude)
  end

  result
end

parse_file (filename)

Parses filename and returns an RDoc::TopLevel

# File lib/rdoc/rdoc.rb, line 332
  def parse_file filename
    encoding = @options.encoding
    filename = filename.encode encoding

    @stats.add_file filename

    return if RDoc::Parser.binary? filename

    content = RDoc::Encoding.read_file filename, encoding

    return unless content

    filename_path = Pathname(filename).expand_path
    begin
      relative_path = filename_path.relative_path_from @options.root
    rescue ArgumentError
      relative_path = filename_path
    end

    if @options.page_dir and
       relative_path.to_s.start_with? @options.page_dir.to_s then
      relative_path =
        relative_path.relative_path_from @options.page_dir
    end

    top_level = @store.add_file filename, relative_name: relative_path.to_s

    parser = RDoc::Parser.for top_level, content, @options, @stats

    return unless parser

    parser.scan

    # restart documentation for the classes & modules found
    top_level.classes_or_modules.each do |cm|
      cm.done_documenting = false
    end

    top_level

  rescue Errno::EACCES => e
    $stderr.puts <<-EOF
Unable to read #{filename}, #{e.message}

Please check the permissions for this file.  Perhaps you do not have access to
it or perhaps the original author's permissions are to restrictive.  If the
this is not your library please report a bug to the author.
    EOF
  rescue => e
    $stderr.puts <<-EOF
Before reporting this, could you check that the file you're documenting
has proper syntax:

  #{Gem.ruby} -c #{filename}

RDoc is not a full Ruby parser and will fail when fed invalid ruby programs.

The internal error was:

\t(#{e.class}) #{e.message}

    EOF

    $stderr.puts e.backtrace.join("\n\t") if $DEBUG_RDOC

    raise e
    nil
  end

parse_files (files)

Parse each file on the command line, recursively entering directories.

# File lib/rdoc/rdoc.rb, line 404
def parse_files files
  file_list = gather_files files
  @stats = RDoc::Stats.new @store, file_list.length, @options.verbosity

  return [] if file_list.empty?

  original_options = @options.dup
  @stats.begin_adding

  file_info = file_list.map do |filename|
    @current = filename
    parse_file filename
  end.compact

  @stats.done_adding
  @options = original_options

  file_info
end

remove_siginfo_handler ()

Removes a siginfo handler and replaces the previous

# File lib/rdoc/rdoc.rb, line 535
def remove_siginfo_handler
  return unless Signal.list.key? 'INFO'

  handler = @old_siginfo || 'DEFAULT'

  trap 'INFO', handler
end

remove_unparseable (files)

Removes file extensions known to be unparseable from files and TAGS files for emacs and vim.

# File lib/rdoc/rdoc.rb, line 428
def remove_unparseable files
  files.reject do |file, *|
    file =~ /\.(?:class|eps|erb|scpt\.txt|svg|ttf|yml)$/i or
      (file =~ /tags$/i and
       /\A(\f\n[^,]+,\d+$|!_TAG_)/.match?(File.binread(file, 100)))
  end
end

setup_output_dir (dir, force)

Create an output dir if it doesn’t exist. If it does exist, but doesn’t contain the flag file created.rid then we refuse to use it, as we may clobber some manually generated documentation

# File lib/rdoc/rdoc.rb, line 170
  def setup_output_dir(dir, force)
    flag_file = output_flag_file dir

    last = {}

    if @options.dry_run then
      # do nothing
    elsif File.exist? dir then
      error "#{dir} exists and is not a directory" unless File.directory? dir

      begin
        File.open flag_file do |io|
          unless force then
            Time.parse io.gets

            io.each do |line|
              file, time = line.split "\t", 2
              time = Time.parse(time) rescue next
              last[file] = time
            end
          end
        end
      rescue SystemCallError, TypeError
        error <<-ERROR

Directory #{dir} already exists, but it looks like it isn't an RDoc directory.

Because RDoc doesn't want to risk destroying any of your existing files,
you'll need to specify a different output directory name (using the --op <dir>
option)

        ERROR
      end unless @options.force_output
    else
      FileUtils.mkdir_p dir
      FileUtils.touch flag_file
    end

    last
  end

store= (store)

Sets the current documentation tree to store and sets the store’s rdoc driver to this instance.

# File lib/rdoc/rdoc.rb, line 215
def store= store
  @store = store
  @store.rdoc = self
end

update_output_dir (op_dir, time, last = {})

Update the flag file in an output directory.

# File lib/rdoc/rdoc.rb, line 223
def update_output_dir(op_dir, time, last = {})
  return if @options.dry_run or not @options.update_output_dir
  unless ENV['SOURCE_DATE_EPOCH'].nil?
    time = Time.at(ENV['SOURCE_DATE_EPOCH'].to_i).gmtime
  end

  File.open output_flag_file(op_dir), "w" do |f|
    f.puts time.rfc2822
    last.each do |n, t|
      f.puts "#{n}\t#{t.rfc2822}"
    end
  end
end