class Gem::Commands::SetupCommand

# File lib/rubygems/commands/setup_command.rb, line 15
def initialize
  require 'tmpdir'

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

  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
      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
      options[:document] << 'ri'
    else
      options[:document].delete 'ri'
    end

    options[:document].uniq!
  end

  add_option '--[no-]regenerate-binstubs',
             'Regenerate gem binstubs' do |value, options|
    options[:regenerate_binstubs] = value
  end

  add_option '-f', '--[no-]force',
             'Forcefully overwrite binstubs' do |value, options|
    options[:force] = value
  end

  add_option('-E', '--[no-]env-shebang',
             'Rewrite executables with a shebang',
             'of /usr/bin/env') do |value, options|
    options[:env_shebang] = value
  end

  @verbose = nil
end

# File lib/rubygems/commands/setup_command.rb, line 640
def bin_file_names
  @bin_file_names ||= []
end

# File lib/rubygems/commands/setup_command.rb, line 106
def check_ruby_version
  required_version = Gem::Requirement.new '>= 2.3.0'

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

# File lib/rubygems/commands/setup_command.rb, line 144
def execute
  @verbose = Gem.configuration.really_verbose

  install_destdir = options[:destdir]

  unless install_destdir.empty?
    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
    extend FileUtils::Verbose
  else
    extend FileUtils
  end
  extend MakeDirs

  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

  install_default_bundler_gem bin_dir

  if mode = options[:dir_mode]
    @mkdirs.uniq!
    File.chmod(mode, @mkdirs)
  end

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

  regenerate_binstubs if options[:regenerate_binstubs]

  uninstall_old_gemcutter

  documentation_success = install_rdoc

  say
  if @verbose
    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$/)
    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'
      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'
      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 455
def generate_default_dirs(install_destdir)
  prefix = options[:prefix]
  site_or_vendor = options[:site_or_vendor]

  if prefix.empty?
    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'))
      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?
    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 382
def install_default_bundler_gem(bin_dir)
  specs_dir = Gem.default_specifications_dir
  specs_dir = File.join(options[:destdir], specs_dir) unless Gem.win_platform?
  mkdir_p specs_dir, :mode => 0755

  # Workaround for non-git environment.
  gemspec = File.open('bundler/bundler.gemspec', 'rb'){|f| f.read.gsub(/`git ls-files -z`/, "''") }
  File.open('bundler/bundler.gemspec', 'w'){|f| f.write gemspec }

  bundler_spec = Gem::Specification.load("bundler/bundler.gemspec")
  bundler_spec.files = Dir.chdir("bundler") { Dir["{*.md,{lib,exe,man}/**/*}"] }
  bundler_spec.executables -= %w[bundler bundle_ruby]

  # Remove bundler-*.gemspec in default specification directory.
  Dir.entries(specs_dir).
    select {|gs| gs.start_with?("bundler-") }.
    each {|gs| File.delete(File.join(specs_dir, gs)) }

  default_spec_path = File.join(specs_dir, "#{bundler_spec.full_name}.gemspec")
  Gem.write_binary(default_spec_path, bundler_spec.to_ruby)

  bundler_spec = Gem::Specification.load(default_spec_path)

  # Remove gemspec that was same version of vendored bundler.
  normal_gemspec = File.join(Gem.default_dir, "specifications", "bundler-#{bundler_spec.version}.gemspec")
  if File.file? normal_gemspec
    File.delete normal_gemspec
  end

  # Remove gem files that were same version of vendored bundler.
  if File.directory? bundler_spec.gems_dir
    Dir.entries(bundler_spec.gems_dir).
      select {|default_gem| File.basename(default_gem) == "bundler-#{bundler_spec.version}" }.
      each {|default_gem| rm_r File.join(bundler_spec.gems_dir, default_gem) }
  end

  bundler_bin_dir = bundler_spec.bin_dir
  bundler_bin_dir = File.join(options[:destdir], bundler_bin_dir) unless Gem.win_platform?
  mkdir_p bundler_bin_dir, :mode => 0755
  bundler_spec.executables.each do |e|
    cp File.join("bundler", bundler_spec.bindir, e), File.join(bundler_bin_dir, e)
  end

  require 'rubygems/installer'

  Dir.chdir("bundler") do
    built_gem = Gem::Package.build(bundler_spec)
    begin
      installer = Gem::Installer.at(built_gem, env_shebang: options[:env_shebang], format_executable: options[:format_executable], force: options[:force], install_as_default: true, bin_dir: bin_dir, wrappers: true)
      installer.install
    ensure
      FileUtils.rm_f built_gem
    end
  end

  bundler_spec.executables.each {|executable| bin_file_names << target_bin_path(bin_dir, executable) }

  say "Bundler #{bundler_spec.version} installed"
end

# File lib/rubygems/commands/setup_command.rb, line 243
  def install_executables(bin_dir)
    prog_mode = options[:prog_mode] || 0755

    executables = { 'gem' => 'bin' }
    executables.each do |tool, path|
      say "Installing #{tool} executable" if @verbose

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

        bin_files -= %w[update_rubygems]

        bin_files.each do |bin_file|
          dest_file = target_bin_path(bin_dir, bin_file)
          bin_tmp_file = File.join Dir.tmpdir, "#{bin_file}.#{$$}"

          begin
            bin = File.readlines bin_file
            bin[0] = shebang

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

            install bin_tmp_file, dest_file, :mode => prog_mode
            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 => prog_mode
          ensure
            rm bin_cmd_file
          end
        end
      end
    end
  end

# File lib/rubygems/commands/setup_command.rb, line 308
def install_file(file, dest_dir)
  dest_file = File.join dest_dir, file
  dest_dir = File.dirname dest_file
  unless File.directory? dest_dir
    mkdir_p dest_dir, :mode => 0755
  end

  install file, dest_file, :mode => options[:data_mode] || 0644
end

# File lib/rubygems/commands/setup_command.rb, line 318
def install_lib(lib_dir)
  libs = { 'RubyGems' => 'lib' }
  libs['Bundler'] = 'bundler/lib'
  libs.each do |tool, path|
    say "Installing #{tool}" if @verbose

    lib_files = rb_files_in path
    lib_files.concat(template_files) if tool == 'Bundler'

    pem_files = pem_files_in path

    Dir.chdir path 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
end

# File lib/rubygems/commands/setup_command.rb, line 341
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)
    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
    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 442
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, :mode => 0755
  mkdir_p bin_dir, :mode => 0755

  return lib_dir, bin_dir
end

# File lib/rubygems/commands/setup_command.rb, line 487
def pem_files_in(dir)
  Dir.chdir dir do
    Dir[File.join('**', '*pem')]
  end
end

# File lib/rubygems/commands/setup_command.rb, line 493
def rb_files_in(dir)
  Dir.chdir dir do
    Dir[File.join('**', '*rb')]
  end
end

# File lib/rubygems/commands/setup_command.rb, line 616
def regenerate_binstubs
  require "rubygems/commands/pristine_command"
  say "Regenerating binstubs"

  args = %w[--all --only-executables --silent]
  if options[:env_shebang]
    args << "--env-shebang"
  end

  command = Gem::Commands::PristineCommand.new
  command.invoke(*args)
end

# File lib/rubygems/commands/setup_command.rb, line 515
  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 547
def remove_old_lib_files(lib_dir)
  lib_dirs = { File.join(lib_dir, 'rubygems') => 'lib/rubygems' }
  lib_dirs[File.join(lib_dir, 'bundler')] = 'bundler/lib/bundler'
  lib_dirs.each do |old_lib_dir, new_lib_dir|
    lib_files = rb_files_in(new_lib_dir)
    lib_files.concat(template_files_in(new_lib_dir)) if new_lib_dir =~ /bundler/

    old_lib_files = rb_files_in(old_lib_dir)
    old_lib_files.concat(template_files_in(old_lib_dir)) if old_lib_dir =~ /bundler/

    to_remove = old_lib_files - lib_files

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

    Dir.chdir old_lib_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
end

# File lib/rubygems/commands/setup_command.rb, line 298
def shebang
  if options[:env_shebang]
    ruby_name = RbConfig::CONFIG['ruby_install_name']
    @env_path ||= ENV_PATHS.find {|env_path| File.executable? env_path }
    "#!#{@env_path} #{ruby_name}\n"
  else
    "#!#{Gem.ruby}\n"
  end
end

# File lib/rubygems/commands/setup_command.rb, line 574
  def show_release_notes
    release_notes = File.join Dir.pwd, 'History.txt'

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

        history.force_encoding Encoding::UTF_8

        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

  def regenerate_binstubs
    require "rubygems/commands/pristine_command"
    say "Regenerating binstubs"

    args = %w[--all --only-executables --silent]
    if options[:env_shebang]
      args << "--env-shebang"
    end

    command = Gem::Commands::PristineCommand.new
    command.invoke(*args)
  end

  private

  def target_bin_path(bin_dir, bin_file)
    bin_file_formatted = if options[:format_executable]
                           Gem.default_exec_format % bin_file
                         else
                           bin_file
                         end
    File.join bin_dir, bin_file_formatted
  end

  def bin_file_names
    @bin_file_names ||= []
  end

end

# File lib/rubygems/commands/setup_command.rb, line 631
def target_bin_path(bin_dir, bin_file)
  bin_file_formatted = if options[:format_executable]
                         Gem.default_exec_format % bin_file
                       else
                         bin_file
                       end
  File.join bin_dir, bin_file_formatted
end

# File lib/rubygems/commands/setup_command.rb, line 500
def template_files
  Dir.chdir "bundler/lib" do
    (Dir[File.join('bundler', 'templates', '**', '{*,.*}')]).
      select{|f| !File.directory?(f)}
  end
end

# File lib/rubygems/commands/setup_command.rb, line 508
def template_files_in(dir)
  Dir.chdir dir do
    (Dir[File.join('templates', '**', '{*,.*}')]).
      select{|f| !File.directory?(f)}
  end
end

# File lib/rubygems/commands/setup_command.rb, line 607
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