0UT1S's

def initialize
    super 'rdoc', 'Generates RDoc for pre-installed gems',
          :version => Gem::Requirement.default,
          :include_rdoc => false, :include_ri => true, :overwrite => false

add_option('--all',
               'Generate RDoc/RI documentation for all',
               'installed gems') do |value, options|
      options[:all] = value
    end

add_option('--[no-]rdoc',
               'Generate RDoc HTML') do |value, options|
      options[:include_rdoc] = value
    end

add_option('--[no-]ri',
               'Generate RI data') do |value, options|
      options[:include_ri] = value
    end

add_option('--[no-]overwrite',
               'Overwrite installed documents') do |value, options|
      options[:overwrite] = value
    end

add_version_option
  end

def arguments # :nodoc:
    "GEMNAME       gem to generate documentation for (unless --all)"
  end

def defaults_str # :nodoc:
    "--version '#{Gem::Requirement.default}' --ri --no-overwrite"
  end

def description # :nodoc:
    <<-DESC
The rdoc command builds documentation for installed gems.  By default
only documentation is built using rdoc, but additional types of
documentation may be built through rubygems plugins and the
Gem.post_installs hook.

Use --overwrite to force rebuilding of documentation.
    DESC
  end

def usage # :nodoc:
    "#{program_name} [args]"
  end

def execute
    specs = if options[:all]
              Gem::Specification.to_a
            else
              get_all_gem_names.map do |name|
                Gem::Specification.find_by_name name, options[:version]
              end.flatten.uniq
            end

if specs.empty?
      alert_error 'No matching gems found'
      terminate_interaction 1
    end

specs.each do |spec|
      doc = Gem::RDoc.new spec, options[:include_rdoc], options[:include_ri]

doc.force = options[:overwrite]

if options[:overwrite]
        FileUtils.rm_rf File.join(spec.doc_dir, 'ri')
        FileUtils.rm_rf File.join(spec.doc_dir, 'rdoc')
      end

begin
        doc.generate
      rescue Errno::ENOENT => e
        e.message =~ / - /
        alert_error "Unable to document #{spec.full_name}, #{$'} is missing, skipping"
        terminate_interaction 1 if specs.length == 1
      end
    end
  end

end