# class RDoc::RDoc

This is the driver for generating RDoc output. It 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.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 <tt>rdoc –help<tt> for details.

### Constants

GENERATORS

  This is the list of supported output generators

### Attributes

exclude[RW]

File pattern to exclude

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

### Public Class Methods

add_generator(klass) click to toggle source

Add `klass` that can generate output after parsing

    # File lib/rdoc/rdoc.rb, line 64
    def self.add_generator(klass)
      name = klass.name.sub(%r^RDoc::Generator::/, '').downcase
      GENERATORS[name] = klass
    end

current() click to toggle source

Active RDoc::RDoc instance

    # File lib/rdoc/rdoc.rb, line 72
    def self.current
      @current
    end

current=(rdoc) click to toggle source

Sets the active RDoc::RDoc instance

    # File lib/rdoc/rdoc.rb, line 79
    def self.current= rdoc
      @current = rdoc
    end

new() click to toggle source

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

    # File lib/rdoc/rdoc.rb, line 96
    def initialize
      @current       = nil
      @exclude       = nil
      @generator     = nil
      @last_modified = {}
      @old_siginfo   = nil
      @options       = nil
      @stats         = nil
    end

reset() click to toggle source

Resets all internal state

    # File lib/rdoc/rdoc.rb, line 86
    def self.reset
      RDoc::TopLevel.reset
      RDoc::Parser::C.reset
      RDoc::RDoc.current = nil
    end

### Public Instance Methods

document(options) click to toggle source

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 427
    def document options
      RDoc::RDoc.reset
      RDoc::RDoc.current = self

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

      if @options.pipe then
        handle_pipe
        exit
      end

      @exclude = @options.exclude

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

      @start_time = Time.now

      file_info = parse_files @options.files

      @options.default_title = "RDoc Documentation"

      RDoc::TopLevel.complete @options.visibility

      @stats.coverage_level = @options.coverage_report

      if @options.coverage_report then
        puts

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

        @generator = gen_klass.new @options

        generate file_info
      end

      if @stats and (@options.coverage_report or not @options.quiet) then
        puts
        puts @stats.summary
      end

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

error(msg) click to toggle source

Report an error message and exit

    # File lib/rdoc/rdoc.rb, line 109
    def error(msg)
      raise RDoc::Error, msg
    end

gather_files(files) click to toggle source

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

    # File lib/rdoc/rdoc.rb, line 117
    def gather_files files
      files = ["."] if files.empty?

      file_list = normalized_file_list files, true, @exclude

      file_list = file_list.uniq

      file_list = remove_unparseable file_list
    end

generate(file_info) click to toggle source

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 487
    def generate file_info
      Dir.chdir @options.op_dir do
        unless @options.quiet then
          $stderr.puts "\nGenerating #{@generator.class.name.sub(/^.*::/, '')} format into #{Dir.pwd}..."
        end

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

handle_pipe() click to toggle source

Turns RDoc from stdin into HTML

    # File lib/rdoc/rdoc.rb, line 130
    def handle_pipe
      @html = RDoc::Markup::ToHtml.new

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

      document = parser.parse $stdin.read

      out = @html.convert document

      $stdout.write out
    end

install_siginfo_handler() click to toggle source

Installs a siginfo handler that prints the current filename.

    # File lib/rdoc/rdoc.rb, line 145
    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) click to toggle source

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 319
    def list_files_in_directory dir
      files = Dir.glob File.join(dir, "*")

      normalized_file_list files, false, @options.exclude
    end

load_options() click to toggle source

Loads options from .rdoc_options if the file exists, otherwise creates a new RDoc::Options instance.

    # File lib/rdoc/rdoc.rb, line 157
    def load_options
      options_file = File.expand_path '.rdoc_options'
      return RDoc::Options.new unless File.exist? options_file

      RDoc.load_yaml

      parse_error = if Object.const_defined? :Psych then
                      Psych::SyntaxError
                    else
                      ArgumentError
                    end

      begin
        options = YAML.load_file '.rdoc_options'
      rescue *parse_error
      end

      raise RDoc::Error, "#{options_file} is not a valid rdoc options file" unless
        RDoc::Options === options

      options
    end

normalized_file_list(relative_files, force_doc = false, exclude_pattern = nil) click to toggle source

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 278
    def normalized_file_list(relative_files, force_doc = false,
                             exclude_pattern = nil)
      file_list = []

      relative_files.each do |rel_file_name|
        next if exclude_pattern && exclude_pattern =~ rel_file_name
        stat = File.stat rel_file_name rescue next

        case type = stat.ftype
        when "file" then
          next if 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.sub(%r^\.\//, '')
            @last_modified[rel_file_name] = stat.mtime
          end
        when "directory" then
          next if rel_file_name == "CVS" || rel_file_name == ".svn"

          dot_doc = File.join rel_file_name, RDoc::DOT_DOC_FILENAME

          if File.file? dot_doc then
            file_list << parse_dot_doc_file(rel_file_name, dot_doc)
          else
            file_list << list_files_in_directory(rel_file_name)
          end
        else
          raise RDoc::Error, "I can't deal with a #{type} #{rel_file_name}"
        end
      end

      file_list.flatten
    end

output_flag_file(op_dir) click to toggle source

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

    # File lib/rdoc/rdoc.rb, line 243
    def output_flag_file(op_dir)
      File.join op_dir, "created.rid"
    end

parse_dot_doc_file(in_dir, filename) click to toggle source

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 252
    def parse_dot_doc_file in_dir, filename
      # read and strip comments
      patterns = File.read(filename).gsub(%r#.*/, '')

      result = []

      patterns.split.each do |patt|
        candidates = Dir.glob(File.join(in_dir, patt))
        result.concat normalized_file_list(candidates)
      end

      result
    end

parse_file(filename) click to toggle source

Parses `filename` and returns an RDoc::TopLevel

    # File lib/rdoc/rdoc.rb, line 328
      def parse_file filename
        if defined?(Encoding) then
          encoding = @options.encoding
          filename = filename.encode encoding
        end

        @stats.add_file filename

        content = RDoc::Encoding.read_file filename, encoding

        return unless content

        top_level = RDoc::TopLevel.new filename

        parser = RDoc::Parser.for top_level, filename, 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 => e
        $stderr.puts "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}

    "

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

        raise e
        nil
      end

parse_files(files) click to toggle source

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

    # File lib/rdoc/rdoc.rb, line 379
    def parse_files files
      file_list = gather_files files
      @stats = RDoc::Stats.new file_list.size, @options.verbosity

      return [] if file_list.empty?

      file_info = []

      @stats.begin_adding

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

      @stats.done_adding

      file_info
    end

remove_siginfo_handler() click to toggle source

Removes a siginfo handler and replaces the previous

    # File lib/rdoc/rdoc.rb, line 501
    def remove_siginfo_handler
      return unless Signal.list.key? 'INFO'

      handler = @old_siginfo || 'DEFAULT'

      trap 'INFO', handler
    end

remove_unparseable(files) click to toggle source

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

    # File lib/rdoc/rdoc.rb, line 403
    def remove_unparseable files
      files.reject do |file|
        file =~ %r\.(?:class|eps|erb|scpt\.txt|ttf|yml)$/ or
          (file =~ %rtags$/ and
           open(file, 'rb') { |io|
             io.read(100) =~ %r\A(\f\n[^,]+,\d+$|!_TAG_)/
           })
      end
    end

setup_output_dir(dir, force) click to toggle source

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 185
      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
            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 "
    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)

    "
          end unless @options.force_output
        else
          FileUtils.mkdir_p dir
          FileUtils.touch output_flag_file dir
        end

        last
      end

update_output_dir(op_dir, time, last = {}) click to toggle source

Update the flag file in an output directory.

    # File lib/rdoc/rdoc.rb, line 229
    def update_output_dir(op_dir, time, last = {})
      return if @options.dry_run or not @options.update_output_dir

      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