Class: Gem::Commands::SetupCommand

# File 'lib/rubygems/commands/setup_command.rb', line 110

def check_ruby_version
  required_version = Gem::Requirement.new ">= 2.6.0"

  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 610

def default_dir
  prefix = options[:prefix]

  if prefix.empty?
    dir = Gem.default_dir
  else
    dir = prefix
  end

  prepend_destdir_if_present(dir)
end

# File 'lib/rubygems/commands/setup_command.rb', line 119

def defaults_str # :nodoc:
  "--format-executable --document ri --regenerate-binstubs"
end

# File 'lib/rubygems/commands/setup_command.rb', line 123

def description # :nodoc:
  <<-EOF
Installs RubyGems itself.

RubyGems installs RDoc for itself in GEM_HOME.  By default this is:
#{Gem.dir}

If you prefer a different directory, set the GEM_HOME environment variable.

RubyGems will install the gem command with a name matching ruby's
prefix and suffix.  If ruby was installed as `ruby18`, gem will be
installed as `gem18`.

By default, this RubyGems will install gem as:
#{Gem.default_exec_format % "gem"}
  EOF
end

# File 'lib/rubygems/commands/setup_command.rb', line 148

def execute
  @verbose = Gem.configuration.really_verbose

  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
  man_dir = generate_default_man_dir

  install_lib lib_dir

  install_executables bin_dir

  remove_old_bin_files bin_dir

  remove_old_lib_files lib_dir

  # Can be removed one we drop support for bundler 2.2.3 (the last version installing man files to man_dir)
  remove_old_man_files man_dir if man_dir && File.exist?(man_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(bin_dir) if options[:regenerate_binstubs]
  regenerate_plugins(bin_dir) if options[:regenerate_plugins]

  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 464

def files_in(dir)
  Dir.chdir dir do
    Dir.glob(File.join("**", "*"), File::FNM_DOTMATCH).
      select {|f| !File.directory?(f) }
  end
end

# File 'lib/rubygems/commands/setup_command.rb', line 449

def generate_default_dirs
  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
    lib_dir = File.join prefix, "lib"
    bin_dir = File.join prefix, "bin"
  end

  [prepend_destdir_if_present(lib_dir), prepend_destdir_if_present(bin_dir)]
end

# File 'lib/rubygems/commands/setup_command.rb', line 436

def generate_default_man_dir
  prefix = options[:prefix]

  if prefix.empty?
    man_dir = RbConfig::CONFIG["mandir"]
    return unless man_dir
  else
    man_dir = File.join prefix, "man"
  end

  prepend_destdir_if_present(man_dir)
end

# File 'lib/rubygems/commands/setup_command.rb', line 363

def install_default_bundler_gem(bin_dir)
  current_default_spec = Gem::Specification.default_stubs.find {|s| s.name == "bundler" }
  specs_dir = if current_default_spec && default_dir == Gem.default_dir
    Gem::Specification.remove_spec current_default_spec
    loaded_from = current_default_spec.loaded_from
    File.delete(loaded_from)
    File.dirname(loaded_from)
  else
    target_specs_dir = File.join(default_dir, "specifications", "default")
    mkdir_p target_specs_dir, mode: 0o755
    target_specs_dir
  end

  new_bundler_spec = Dir.chdir("bundler") { Gem::Specification.load("bundler.gemspec") }
  full_name = new_bundler_spec.full_name
  gemspec_path = "#{full_name}.gemspec"

  default_spec_path = File.join(specs_dir, gemspec_path)
  Gem.write_binary(default_spec_path, new_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(default_dir, "specifications", gemspec_path)
  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) == full_name }.
      each {|default_gem| rm_r File.join(bundler_spec.gems_dir, default_gem) }
  end

  require_relative "../installer"

  Dir.chdir("bundler") do
    built_gem = Gem::Package.build(new_bundler_spec)
    begin
      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,
        install_dir: default_dir,
        wrappers: true
      ).install
    ensure
      FileUtils.rm_f built_gem
    end
  end

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

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

# File 'lib/rubygems/commands/setup_command.rb', line 245

def install_executables(bin_dir)
  prog_mode = options[:prog_mode] || 0o755

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

    Dir.chdir path do
      bin_file = "gem"

      require "tmpdir"

      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

# File 'lib/rubygems/commands/setup_command.rb', line 635

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: 0o755
  end

  install file, dest_file, mode: options[:data_mode] || 0o644
end

# File 'lib/rubygems/commands/setup_command.rb', line 629

def install_file_list(files, dest_dir)
  files.each do |file|
    install_file file, dest_dir
  end
end

# File 'lib/rubygems/commands/setup_command.rb', line 308

def install_lib(lib_dir)
  libs = { "RubyGems" => "lib" }
  libs["Bundler"] = "bundler/lib"
  libs.each do |tool, path|
    say "Installing #{tool}" if @verbose

    lib_files = files_in path

    Dir.chdir path do
      install_file_list(lib_files, lib_dir)
    end
  end
end

# File 'lib/rubygems/commands/setup_command.rb', line 322

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) &&
     (!File.exist?(rubygems_doc_dir) ||
      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_relative "../rdoc"

    fake_spec = Gem::Specification.new "rubygems", Gem::VERSION
    def fake_spec.full_gem_path
      File.expand_path "../../..", __dir__
    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

  false
end

# File 'lib/rubygems/commands/setup_command.rb', line 423

def make_destination_dirs
  lib_dir, bin_dir = Gem.default_rubygems_dirs

  unless lib_dir
    lib_dir, bin_dir = generate_default_dirs
  end

  mkdir_p lib_dir, mode: 0o755
  mkdir_p bin_dir, mode: 0o755

  [lib_dir, bin_dir]
end

# File 'lib/rubygems/commands/setup_command.rb', line 622

def prepend_destdir_if_present(path)
  destdir = options[:destdir]
  return path if destdir.empty?

  File.join(options[:destdir], path.gsub(/^[a-zA-Z]:/, ""))
end

# File 'lib/rubygems/commands/setup_command.rb', line 582

def regenerate_binstubs(bindir)
  require_relative "pristine_command"
  say "Regenerating binstubs"

  args = %w[--all --only-executables --silent]
  args << "--bindir=#{bindir}"
  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 596

def regenerate_plugins(bindir)
  require_relative "pristine_command"
  say "Regenerating plugins"

  args = %w[--all --only-plugins --silent]
  args << "--bindir=#{bindir}"
  args << "--install-dir=#{default_dir}"

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

# File 'lib/rubygems/commands/setup_command.rb', line 645

def remove_file_list(files, dir)
  Dir.chdir dir do
    files.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 471

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 503

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 = files_in(new_lib_dir)

    old_lib_files = files_in(old_lib_dir)

    to_remove = old_lib_files - lib_files

    gauntlet_rubygems = File.join(lib_dir, "gauntlet_rubygems.rb")
    to_remove << gauntlet_rubygems if File.exist? gauntlet_rubygems

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

    remove_file_list(to_remove, old_lib_dir)
  end
end

# File 'lib/rubygems/commands/setup_command.rb', line 524

def remove_old_man_files(old_man_dir)
  old_man1_dir = "#{old_man_dir}/man1"

  if File.exist?(old_man1_dir)
    man1_to_remove = Dir.chdir(old_man1_dir) { Dir["bundle*.1{,.txt,.ronn}"] }

    remove_file_list(man1_to_remove, old_man1_dir)
  end

  old_man5_dir = "#{old_man_dir}/man5"

  if File.exist?(old_man5_dir)
    man5_to_remove = Dir.chdir(old_man5_dir) { Dir["gemfile.5{,.txt,.ronn}"] }

    remove_file_list(man5_to_remove, old_man5_dir)
  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 542

def show_release_notes
  release_notes = File.join Dir.pwd, "CHANGELOG.md"

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

      history.force_encoding Encoding::UTF_8

      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 ||
            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

# File 'lib/rubygems/commands/setup_command.rb', line 656

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 573

def uninstall_old_gemcutter
  require_relative "../uninstaller"

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