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

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

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

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

# File ruby/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

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

# File ruby/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

# File ruby/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}..."
      end

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

# File ruby/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

# File ruby/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

# File ruby/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

# File ruby/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

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

# File ruby/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

# File ruby/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, 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 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

# File ruby/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

# File ruby/lib/rdoc/rdoc.rb, line 534
def remove_siginfo_handler
  return unless Signal.list.key? 'INFO'

  handler = @old_siginfo || 'DEFAULT'

  trap 'INFO', handler
end

# File ruby/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

# File ruby/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

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

# File ruby/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