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setup_command.rb

# frozen_string_literal: true
require 'rubygems/command'

##
# Installs RubyGems itself.  This command is ordinarily only available from a
# RubyGems checkout or tarball.

class Gem::Commands::SetupCommand < Gem::Command
  HISTORY_HEADER = /^===\s*[\d.a-zA-Z]+\s*\/\s*\d{4}-\d{2}-\d{2}\s*$/.freeze
  VERSION_MATCHER = /^===\s*([\d.a-zA-Z]+)\s*\/\s*\d{4}-\d{2}-\d{2}\s*$/.freeze

ENV_PATHS = %w[/usr/bin/env /bin/env].freeze

def initialize
    require 'tmpdir'

super 'setup', 'Install RubyGems',
          :format_executable => true, :document => %w[ri],
          :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('-E', '--[no-]env-shebang',
               'Rewrite executables with a shebang',
               'of /usr/bin/env') do |value, options|
      options[:env_shebang] = value
    end

@verbose = nil
  end

def check_ruby_version
    required_version = Gem::Requirement.new '>= 1.8.7'

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

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

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

module MakeDirs
    def mkdir_p(path, *opts)
      super
      (@mkdirs ||= []) << path
    end
  end

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

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

def install_executables(bin_dir)
    @bin_file_names = []

prog_mode = options[:prog_mode] || 0755

executables = { 'gem' => 'bin' }
    executables['bundler'] = 'bundler/exe' if Gem::USE_BUNDLER_FOR_GEMDEPS
    executables.each do |tool, path|
      say "Installing #{tool} executable" if @verbose

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

bin_files -= %w[update_rubygems bundler bundle_ruby]

bin_files.each do |bin_file|
          bin_file_formatted = if options[:format_executable]
                                 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] = 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

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

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

def install_lib(lib_dir)
    libs = { 'RubyGems' => 'lib' }
    libs['Bundler'] = 'bundler/lib' if Gem::USE_BUNDLER_FOR_GEMDEPS
    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

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

def install_default_bundler_gem
    return unless Gem::USE_BUNDLER_FOR_GEMDEPS

specs_dir = Gem::Specification.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

if Gem.win_platform?
      require 'rubygems/installer'

installer = Gem::Installer.for_spec bundler_spec
      bundler_spec.executables.each do |e|
        installer.generate_windows_script e, bundler_spec.bin_dir
      end
    end

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

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

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

def pem_files_in(dir)
    Dir.chdir dir do
      Dir[File.join('**', '*pem')]
    end
  end

def rb_files_in(dir)
    Dir.chdir dir do
      Dir[File.join('**', '*rb')]
    end
  end

# for installation of bundler as default gems
  def template_files
    Dir.chdir "bundler/lib" do
      (Dir[File.join('bundler', 'templates', '**', '{*,.*}')]).
        select{|f| !File.directory?(f)}
    end
  end

# for cleanup old bundler files
  def template_files_in(dir)
    Dir.chdir dir do
      (Dir[File.join('templates', '**', '{*,.*}')]).
        select{|f| !File.directory?(f)}
    end
  end

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

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' if Gem::USE_BUNDLER_FOR_GEMDEPS
    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

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

end

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