class Gem::Commands::SetupCommand

# File lib/rubygems/commands/setup_command.rb, line 12
def initialize
  require 'tmpdir'

  super 'setup', 'Install RubyGems',
        :format_executable => true, :document => %w[ri],
        :site_or_vendor => 'sitelibdir',
        :destdir => '', :prefix => '', :previous_version => ''

  add_option '--previous-version=VERSION',
             'Previous version of rubygems',
             'Used for changelog processing' do |version, options|
    options[:previous_version] = version
  end

  add_option '--prefix=PREFIX',
             'Prefix path for installing RubyGems',
             'Will not affect gem repository location' do |prefix, options|
    options[:prefix] = File.expand_path prefix
  end

  add_option '--destdir=DESTDIR',
             'Root directory to install RubyGems into',
             'Mainly used for packaging RubyGems' do |destdir, options|
    options[:destdir] = File.expand_path destdir
  end

  add_option '--[no-]vendor',
             'Install into vendorlibdir not sitelibdir' do |vendor, options|
    options[:site_or_vendor] = vendor ? 'vendorlibdir' : 'sitelibdir'
  end

  add_option '--[no-]format-executable',
             'Makes `gem` match ruby',
             'If ruby is ruby18, gem will be gem18' do |value, options|
    options[:format_executable] = value
  end

  add_option '--[no-]document [TYPES]', Array,
             'Generate documentation for RubyGems',
             'List the documentation types you wish to',
             'generate.  For example: rdoc,ri' do |value, options|
    options[:document] = case value
                         when nil   then %w[rdoc ri]
                         when false then []
                         else            value
                         end
  end

  add_option '--[no-]rdoc',
             'Generate RDoc documentation for RubyGems' do |value, options|
    if value then
      options[:document] << 'rdoc'
    else
      options[:document].delete 'rdoc'
    end

    options[:document].uniq!
  end

  add_option '--[no-]ri',
             'Generate RI documentation for RubyGems' do |value, options|
    if value then
      options[:document] << 'ri'
    else
      options[:document].delete 'ri'
    end

    options[:document].uniq!
  end

  @verbose = nil
end

# File lib/rubygems/commands/setup_command.rb, line 85
def check_ruby_version
  required_version = Gem::Requirement.new '>= 1.8.7'

  unless required_version.satisfied_by? Gem.ruby_version then
    alert_error "Expected Ruby version #{required_version}, is #{Gem.ruby_version}"
    terminate_interaction 1
  end
end

# File lib/rubygems/commands/setup_command.rb, line 116
def execute
  @verbose = Gem.configuration.really_verbose

  install_destdir = options[:destdir]

  unless install_destdir.empty? then
    ENV['GEM_HOME'] ||= File.join(install_destdir,
                                  Gem.default_dir.gsub(/^[a-zA-Z]:/, ''))
  end

  check_ruby_version

  require 'fileutils'
  if Gem.configuration.really_verbose then
    extend FileUtils::Verbose
  else
    extend FileUtils
  end

  lib_dir, bin_dir = make_destination_dirs install_destdir

  install_lib lib_dir

  install_executables bin_dir

  remove_old_bin_files bin_dir

  remove_old_lib_files lib_dir

  say "RubyGems #{Gem::VERSION} installed"

  uninstall_old_gemcutter

  documentation_success = install_rdoc

  say
  if @verbose then
    say "-" * 78
    say
  end

  if options[:previous_version].empty?
    options[:previous_version] = Gem::VERSION.sub(/[0-9]+$/, '0')
  end

  options[:previous_version] = Gem::Version.new(options[:previous_version])

  show_release_notes

  say
  say "-" * 78
  say

  say "RubyGems installed the following executables:"
  say @bin_file_names.map { |name| "\t#{name}\n" }
  say

  unless @bin_file_names.grep(/#{File::SEPARATOR}gem$/) then
    say "If `gem` was installed by a previous RubyGems installation, you may need"
    say "to remove it by hand."
    say
  end

  if documentation_success
    if options[:document].include? 'rdoc' then
      say "Rdoc documentation was installed. You may now invoke:"
      say "  gem server"
      say "and then peruse beautifully formatted documentation for your gems"
      say "with your web browser."
      say "If you do not wish to install this documentation in the future, use the"
      say "--no-document flag, or set it as the default in your ~/.gemrc file. See"
      say "'gem help env' for details."
      say
    end

    if options[:document].include? 'ri' then
      say "Ruby Interactive (ri) documentation was installed. ri is kind of like man "
      say "pages for ruby libraries. You may access it like this:"
      say "  ri Classname"
      say "  ri Classname.class_method"
      say "  ri Classname#instance_method"
      say "If you do not wish to install this documentation in the future, use the"
      say "--no-document flag, or set it as the default in your ~/.gemrc file. See"
      say "'gem help env' for details."
      say
    end
  end
end

# File lib/rubygems/commands/setup_command.rb, line 342
def generate_default_dirs(install_destdir)
  prefix = options[:prefix]
  site_or_vendor = options[:site_or_vendor]

  if prefix.empty? then
    lib_dir = RbConfig::CONFIG[site_or_vendor]
    bin_dir = RbConfig::CONFIG['bindir']
  else
    # Apple installed RubyGems into libdir, and RubyGems <= 1.1.0 gets
    # confused about installation location, so switch back to
    # sitelibdir/vendorlibdir.
    if defined?(APPLE_GEM_HOME) and
      # just in case Apple and RubyGems don't get this patched up proper.
      (prefix == RbConfig::CONFIG['libdir'] or
       # this one is important
       prefix == File.join(RbConfig::CONFIG['libdir'], 'ruby')) then
       lib_dir = RbConfig::CONFIG[site_or_vendor]
       bin_dir = RbConfig::CONFIG['bindir']
    else
      lib_dir = File.join prefix, 'lib'
      bin_dir = File.join prefix, 'bin'
    end
  end

  unless install_destdir.empty? then
    lib_dir = File.join install_destdir, lib_dir.gsub(/^[a-zA-Z]:/, '')
    bin_dir = File.join install_destdir, bin_dir.gsub(/^[a-zA-Z]:/, '')
  end

  [lib_dir, bin_dir]
end

# File lib/rubygems/commands/setup_command.rb, line 205
  def install_executables(bin_dir)
    say "Installing gem executable" if @verbose

    @bin_file_names = []

    Dir.chdir 'bin' do
      bin_files = Dir['*']

      bin_files.delete 'update_rubygems'

      bin_files.each do |bin_file|
        bin_file_formatted = if options[:format_executable] then
                               Gem.default_exec_format % bin_file
                             else
                               bin_file
                             end

        dest_file = File.join bin_dir, bin_file_formatted
        bin_tmp_file = File.join Dir.tmpdir, "#{bin_file}.#{$$}"

        begin
          bin = File.readlines bin_file
          bin[0] = "#!#{Gem.ruby}\n"

          File.open bin_tmp_file, 'w' do |fp|
            fp.puts bin.join
          end

          install bin_tmp_file, dest_file, :mode => 0755
          @bin_file_names << dest_file
        ensure
          rm bin_tmp_file
        end

        next unless Gem.win_platform?

        begin
          bin_cmd_file = File.join Dir.tmpdir, "#{bin_file}.bat"

          File.open bin_cmd_file, 'w' do |file|
            file.puts <<-TEXT
@ECHO OFF
IF NOT "%~f0" == "~f0" GOTO :WinNT
@"#{File.basename(Gem.ruby).chomp('"')}" "#{dest_file}" %1 %2 %3 %4 %5 %6 %7 %8 %9
GOTO :EOF
:WinNT
@"#{File.basename(Gem.ruby).chomp('"')}" "%~dpn0" %*
TEXT
          end

          install bin_cmd_file, "#{dest_file}.bat", :mode => 0755
        ensure
          rm bin_cmd_file
        end
      end
    end
  end

# File lib/rubygems/commands/setup_command.rb, line 263
def install_file file, dest_dir
  dest_file = File.join dest_dir, file
  dest_dir = File.dirname dest_file
  mkdir_p dest_dir unless File.directory? dest_dir

  install file, dest_file, :mode => 0644
end

# File lib/rubygems/commands/setup_command.rb, line 271
def install_lib(lib_dir)
  say "Installing RubyGems" if @verbose

  lib_files = rb_files_in 'lib'
  pem_files = pem_files_in 'lib'

  Dir.chdir 'lib' do
    lib_files.each do |lib_file|
      install_file lib_file, lib_dir
    end

    pem_files.each do |pem_file|
      install_file pem_file, lib_dir
    end
  end
end

# File lib/rubygems/commands/setup_command.rb, line 288
def install_rdoc
  gem_doc_dir = File.join Gem.dir, 'doc'
  rubygems_name = "rubygems-#{Gem::VERSION}"
  rubygems_doc_dir = File.join gem_doc_dir, rubygems_name

  begin
    Gem.ensure_gem_subdirectories Gem.dir
  rescue SystemCallError
    # ignore
  end

  if File.writable? gem_doc_dir and
     (not File.exist? rubygems_doc_dir or
      File.writable? rubygems_doc_dir) then
    say "Removing old RubyGems RDoc and ri" if @verbose
    Dir[File.join(Gem.dir, 'doc', 'rubygems-[0-9]*')].each do |dir|
      rm_rf dir
    end

    require 'rubygems/rdoc'

    fake_spec = Gem::Specification.new 'rubygems', Gem::VERSION
    def fake_spec.full_gem_path
      File.expand_path '../../../..', __FILE__
    end

    generate_ri   = options[:document].include? 'ri'
    generate_rdoc = options[:document].include? 'rdoc'

    rdoc = Gem::RDoc.new fake_spec, generate_rdoc, generate_ri
    rdoc.generate

    return true
  elsif @verbose then
    say "Skipping RDoc generation, #{gem_doc_dir} not writable"
    say "Set the GEM_HOME environment variable if you want RDoc generated"
  end

  return false
end

# File lib/rubygems/commands/setup_command.rb, line 329
def make_destination_dirs(install_destdir)
  lib_dir, bin_dir = Gem.default_rubygems_dirs

  unless lib_dir
    lib_dir, bin_dir = generate_default_dirs(install_destdir)
  end

  mkdir_p lib_dir
  mkdir_p bin_dir

  return lib_dir, bin_dir
end

# File lib/rubygems/commands/setup_command.rb, line 374
def pem_files_in dir
  Dir.chdir dir do
    Dir[File.join('**', '*pem')]
  end
end

# File lib/rubygems/commands/setup_command.rb, line 380
def rb_files_in dir
  Dir.chdir dir do
    Dir[File.join('**', '*rb')]
  end
end

# File lib/rubygems/commands/setup_command.rb, line 386
  def remove_old_bin_files(bin_dir)
    old_bin_files = {
      'gem_mirror' => 'gem mirror',
      'gem_server' => 'gem server',
      'gemlock' => 'gem lock',
      'gemri' => 'ri',
      'gemwhich' => 'gem which',
      'index_gem_repository.rb' => 'gem generate_index',
    }

    old_bin_files.each do |old_bin_file, new_name|
      old_bin_path = File.join bin_dir, old_bin_file
      next unless File.exist? old_bin_path

      deprecation_message = "`#{old_bin_file}` has been deprecated.  Use `#{new_name}` instead."

      File.open old_bin_path, 'w' do |fp|
        fp.write <<-EOF
#!#{Gem.ruby}

abort "#{deprecation_message}"
    EOF
      end

      next unless Gem.win_platform?

      File.open "#{old_bin_path}.bat", 'w' do |fp|
        fp.puts %{@ECHO.#{deprecation_message}}
      end
    end
  end

# File lib/rubygems/commands/setup_command.rb, line 418
def remove_old_lib_files lib_dir
  rubygems_dir = File.join lib_dir, 'rubygems'
  lib_files = rb_files_in 'lib/rubygems'

  old_lib_files = rb_files_in rubygems_dir

  to_remove = old_lib_files - lib_files

  to_remove.delete_if do |file|
    file.start_with? 'defaults'
  end

  Dir.chdir rubygems_dir do
    to_remove.each do |file|
      FileUtils.rm_f file

      warn "unable to remove old file #{file} please remove it by hand" if
        File.exist? file
    end
  end
end

# File lib/rubygems/commands/setup_command.rb, line 440
  def show_release_notes
    release_notes = File.join Dir.pwd, 'History.txt'

    release_notes =
      if File.exist? release_notes then
        history = File.read release_notes

        history.force_encoding Encoding::UTF_8 if
          Object.const_defined? :Encoding

        history = history.sub(/^# coding:.*?(?=^=)/m, '')

        text = history.split(HISTORY_HEADER)
        text.shift # correct an off-by-one generated by split
        version_lines = history.scan(HISTORY_HEADER)
        versions = history.scan(VERSION_MATCHER).flatten.map do |x|
          Gem::Version.new(x)
        end

        history_string = ""

        until versions.length == 0 or
              versions.shift < options[:previous_version] do
          history_string += version_lines.shift + text.shift
        end

        history_string
      else
        "Oh-no! Unable to find release notes!"
      end

    say release_notes
  end

  def uninstall_old_gemcutter
    require 'rubygems/uninstaller'

    ui = Gem::Uninstaller.new('gemcutter', :all => true, :ignore => true,
                              :version => '< 0.4')
    ui.uninstall
  rescue Gem::InstallError
  end

end

# File lib/rubygems/commands/setup_command.rb, line 474
def uninstall_old_gemcutter
  require 'rubygems/uninstaller'

  ui = Gem::Uninstaller.new('gemcutter', :all => true, :ignore => true,
                            :version => '< 0.4')
  ui.uninstall
rescue Gem::InstallError
end