FM / rubygems

/opt/cpanel/ea-ruby27/root/usr/share/ruby/ruby-2.7.8/rubygems/

/opt/cpanel/ea-ruby27/root/usr/share/ruby/ruby-2.7.8/rubygems

Name	Size	Mode	Actions
commands/	-	0755	rm
core_ext/	-	0755	rm
defaults/	-	0755	rm
ext/	-	0755	rm
package/	-	0755	rm
request/	-	0755	rm
request_set/	-	0755	rm
resolver/	-	0755	rm
security/	-	0755	rm
source/	-	0755	rm
ssl_certs/	-	0755	rm
util/	-	0755	rm
available_set.rb	3094	0644	edit dl rm
basic_specification.rb	7801	0644	edit dl rm
bundler_version_finder.rb	3044	0644	edit dl rm
command.rb	16169	0644	edit dl rm
command_manager.rb	5111	0644	edit dl rm
compatibility.rb	1022	0644	edit dl rm
config_file.rb	12998	0644	edit dl rm
defaults.rb	4879	0644	edit dl rm
dependency.rb	8845	0644	edit dl rm
dependency_installer.rb	12292	0644	edit dl rm
dependency_list.rb	5673	0644	edit dl rm
deprecate.rb	1794	0644	edit dl rm
doctor.rb	3136	0644	edit dl rm
errors.rb	4750	0644	edit dl rm
exceptions.rb	6646	0644	edit dl rm
ext.rb	460	0644	edit dl rm
gemcutter_utilities.rb	5284	0644	edit dl rm
gem_runner.rb	2232	0644	edit dl rm
indexer.rb	11562	0644	edit dl rm
installer.rb	27262	0644	edit dl rm
installer_test_case.rb	4911	0644	edit dl rm
install_default_message.rb	336	0644	edit dl rm
install_message.rb	310	0644	edit dl rm
install_update_options.rb	6412	0644	edit dl rm
local_remote_options.rb	3619	0644	edit dl rm
mock_gem_ui.rb	1418	0644	edit dl rm
name_tuple.rb	2480	0644	edit dl rm
package.rb	18418	0644	edit dl rm
package_task.rb	3888	0644	edit dl rm
path_support.rb	1928	0644	edit dl rm
platform.rb	6401	0644	edit dl rm
psych_additions.rb	300	0644	edit dl rm
psych_tree.rb	796	0644	edit dl rm
rdoc.rb	524	0644	edit dl rm
remote_fetcher.rb	9709	0644	edit dl rm
request.rb	8909	0644	edit dl rm
request_set.rb	12230	0644	edit dl rm
requirement.rb	7323	0644	edit dl rm
resolver.rb	9682	0644	edit dl rm
s3_uri_signer.rb	6070	0644	edit dl rm
safe_yaml.rb	1591	0644	edit dl rm
security.rb	21751	0644	edit dl rm
security_option.rb	1056	0644	edit dl rm
server.rb	23270	0644	edit dl rm
source.rb	5511	0644	edit dl rm
source_list.rb	2610	0644	edit dl rm
source_local.rb	274	0644	edit dl rm
source_specific_file.rb	272	0644	edit dl rm
specification.rb	72481	0644	edit dl rm
specification_policy.rb	11950	0644	edit dl rm
spec_fetcher.rb	6450	0644	edit dl rm
stub_specification.rb	4857	0644	edit dl rm
syck_hack.rb	2170	0644	edit dl rm
test_case.rb	40880	0644	edit dl rm
test_utilities.rb	9054	0644	edit dl rm
text.rb	1894	0644	edit dl rm
uninstaller.rb	9043	0644	edit dl rm
uri_formatter.rb	778	0644	edit dl rm
uri_parser.rb	785	0644	edit dl rm
uri_parsing.rb	324	0644	edit dl rm
user_interaction.rb	13624	0644	edit dl rm
util.rb	2465	0644	edit dl rm
validator.rb	3739	0644	edit dl rm
version.rb	12744	0644	edit dl rm
version_option.rb	2066	0644	edit dl rm

Edit: /opt/cpanel/ea-ruby27/root/usr/share/ruby/ruby-2.7.8/rubygems/installer.rb (27262B)

# frozen_string_literal: true
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++

require 'rubygems/command'
require 'rubygems/exceptions'
require 'rubygems/deprecate'
require 'rubygems/package'
require 'rubygems/ext'
require 'rubygems/user_interaction'
require 'fileutils'

##
# The installer installs the files contained in the .gem into the Gem.home.
#
# Gem::Installer does the work of putting files in all the right places on the
# filesystem including unpacking the gem into its gem dir, installing the
# gemspec in the specifications dir, storing the cached gem in the cache dir,
# and installing either wrappers or symlinks for executables.
#
# The installer invokes pre and post install hooks.  Hooks can be added either
# through a rubygems_plugin.rb file in an installed gem or via a
# rubygems/defaults/#{RUBY_ENGINE}.rb or rubygems/defaults/operating_system.rb
# file.  See Gem.pre_install and Gem.post_install for details.

class Gem::Installer

extend Gem::Deprecate

##
  # Paths where env(1) might live.  Some systems are broken and have it in
  # /bin

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

##
  # Deprecated in favor of Gem::Ext::BuildError

ExtensionBuildError = Gem::Ext::BuildError # :nodoc:

include Gem::UserInteraction

##
  # Filename of the gem being installed.

attr_reader :gem

##
  # The directory a gem's executables will be installed into

attr_reader :bin_dir

attr_reader :build_root # :nodoc:

##
  # The gem repository the gem will be installed into

attr_reader :gem_home

##
  # The options passed when the Gem::Installer was instantiated.

attr_reader :options

##
  # The gem package instance.

attr_reader :package

@path_warning = false

@install_lock = Mutex.new

class << self

##
    # True if we've warned about PATH not including Gem.bindir

attr_accessor :path_warning

##
    # Certain aspects of the install process are not thread-safe. This lock is
    # used to allow multiple threads to install Gems at the same time.

attr_reader :install_lock

##
    # Overrides the executable format.
    #
    # This is a sprintf format with a "%s" which will be replaced with the
    # executable name.  It is based off the ruby executable name's difference
    # from "ruby".

attr_writer :exec_format

# Defaults to use Ruby's program prefix and suffix.
    def exec_format
      @exec_format ||= Gem.default_exec_format
    end

end

##
  # Construct an installer object for the gem file located at +path+

def self.at(path, options = {})
    security_policy = options[:security_policy]
    package = Gem::Package.new path, security_policy
    new package, options
  end

class FakePackage

attr_accessor :spec

attr_accessor :dir_mode
    attr_accessor :prog_mode
    attr_accessor :data_mode

def initialize(spec)
      @spec = spec
    end

def extract_files(destination_dir, pattern = '*')
      FileUtils.mkdir_p destination_dir

spec.files.each do |file|
        file = File.join destination_dir, file
        next if File.exist? file
        FileUtils.mkdir_p File.dirname(file)
        File.open file, 'w' do |fp|
          fp.puts "# #{file}"
        end
      end
    end

def copy_to(path)
    end

end

##
  # Construct an installer object for an ephemeral gem (one where we don't
  # actually have a .gem file, just a spec)

def self.for_spec(spec, options = {})
    # FIXME: we should have a real Package class for this
    new FakePackage.new(spec), options
  end

##
  # Constructs an Installer instance that will install the gem at +package+ which
  # can either be a path or an instance of Gem::Package.  +options+ is a Hash
  # with the following keys:
  #
  # :bin_dir:: Where to put a bin wrapper if needed.
  # :development:: Whether or not development dependencies should be installed.
  # :env_shebang:: Use /usr/bin/env in bin wrappers.
  # :force:: Overrides all version checks and security policy checks, except
  #          for a signed-gems-only policy.
  # :format_executable:: Format the executable the same as the Ruby executable.
  #                      If your Ruby is ruby18, foo_exec will be installed as
  #                      foo_exec18.
  # :ignore_dependencies:: Don't raise if a dependency is missing.
  # :install_dir:: The directory to install the gem into.
  # :security_policy:: Use the specified security policy.  See Gem::Security
  # :user_install:: Indicate that the gem should be unpacked into the users
  #                 personal gem directory.
  # :only_install_dir:: Only validate dependencies against what is in the
  #                     install_dir
  # :wrappers:: Install wrappers if true, symlinks if false.
  # :build_args:: An Array of arguments to pass to the extension builder
  #               process. If not set, then Gem::Command.build_args is used
  # :post_install_message:: Print gem post install message if true

def initialize(package, options={})
    require 'fileutils'

@options = options
    if package.is_a? String
      security_policy = options[:security_policy]
      @package = Gem::Package.new package, security_policy
      if $VERBOSE
        warn "constructing an Installer object with a string is deprecated. Please use Gem::Installer.at (called from: #{caller.first})"
      end
    else
      @package = package
    end

process_options

@package.dir_mode = options[:dir_mode]
    @package.prog_mode = options[:prog_mode]
    @package.data_mode = options[:data_mode]

if options[:user_install]
      @gem_home = Gem.user_dir
      @bin_dir = Gem.bindir gem_home unless options[:bin_dir]
      check_that_user_bin_dir_is_in_path
    end
  end

##
  # Checks if +filename+ exists in +@bin_dir+.
  #
  # If +@force+ is set +filename+ is overwritten.
  #
  # If +filename+ exists and is a RubyGems wrapper for different gem the user
  # is consulted.
  #
  # If +filename+ exists and +@bin_dir+ is Gem.default_bindir (/usr/local) the
  # user is consulted.
  #
  # Otherwise +filename+ is overwritten.

def check_executable_overwrite(filename) # :nodoc:
    return if @force

generated_bin = File.join @bin_dir, formatted_program_filename(filename)

return unless File.exist? generated_bin

ruby_executable = false
    existing = nil

File.open generated_bin, 'rb' do |io|
      next unless io.gets =~ /^#!/ # shebang
      io.gets # blankline

# TODO detect a specially formatted comment instead of trying
      # to run a regexp against Ruby code.
      next unless io.gets =~ /This file was generated by RubyGems/

ruby_executable = true
      existing = io.read.slice(%r{
          ^\s*(
            gem \s |
            load \s Gem\.bin_path\( |
            load \s Gem\.activate_bin_path\(
          )
          (['"])(.*?)(\2),
        }x, 3)
    end

return if spec.name == existing

# somebody has written to RubyGems' directory, overwrite, too bad
    return if Gem.default_bindir != @bin_dir and not ruby_executable

question = "#{spec.name}'s executable \"#{filename}\" conflicts with ".dup

if ruby_executable
      question << (existing || 'an unknown executable')

return if ask_yes_no "#{question}\nOverwrite the executable?", false

conflict = "installed executable from #{existing}"
    else
      question << generated_bin

return if ask_yes_no "#{question}\nOverwrite the executable?", false

conflict = generated_bin
    end

raise Gem::InstallError,
      "\"#{filename}\" from #{spec.name} conflicts with #{conflict}"
  end

##
  # Lazy accessor for the spec's gem directory.

def gem_dir
    @gem_dir ||= File.join(gem_home, "gems", spec.full_name)
  end

##
  # Lazy accessor for the installer's spec.

def spec
    @package.spec
  rescue Gem::Package::Error => e
    raise Gem::InstallError, "invalid gem: #{e.message}"
  end

##
  # Installs the gem and returns a loaded Gem::Specification for the installed
  # gem.
  #
  # The gem will be installed with the following structure:
  #
  #   @gem_home/
  #     cache/<gem-version>.gem #=> a cached copy of the installed gem
  #     gems/<gem-version>/... #=> extracted files
  #     specifications/<gem-version>.gemspec #=> the Gem::Specification

def install
    pre_install_checks

FileUtils.rm_f File.join gem_home, 'specifications', spec.spec_name

run_pre_install_hooks

# Set loaded_from to ensure extension_dir is correct
    if @options[:install_as_default]
      spec.loaded_from = default_spec_file
    else
      spec.loaded_from = spec_file
    end

# Completely remove any previous gem files
    FileUtils.rm_rf gem_dir
    FileUtils.rm_rf spec.extension_dir

dir_mode = options[:dir_mode]
    FileUtils.mkdir_p gem_dir, :mode => dir_mode && 0755

if @options[:install_as_default]
      extract_bin
      write_default_spec
    else
      extract_files

build_extensions
      write_build_info_file
      run_post_build_hooks
    end

generate_bin

unless @options[:install_as_default]
      write_spec
      write_cache_file
    end

File.chmod(dir_mode, gem_dir) if dir_mode

say spec.post_install_message if options[:post_install_message] && !spec.post_install_message.nil?

Gem::Installer.install_lock.synchronize { Gem::Specification.reset }

run_post_install_hooks

spec

# TODO This rescue is in the wrong place. What is raising this exception?
  # move this rescue to around the code that actually might raise it.
  rescue Zlib::GzipFile::Error
    raise Gem::InstallError, "gzip error installing #{gem}"
  end

def run_pre_install_hooks # :nodoc:
    Gem.pre_install_hooks.each do |hook|
      if hook.call(self) == false
        location = " at #{$1}" if hook.inspect =~ /[ @](.*:\d+)/

message = "pre-install hook#{location} failed for #{spec.full_name}"
        raise Gem::InstallError, message
      end
    end
  end

def run_post_build_hooks # :nodoc:
    Gem.post_build_hooks.each do |hook|
      if hook.call(self) == false
        FileUtils.rm_rf gem_dir

location = " at #{$1}" if hook.inspect =~ /[ @](.*:\d+)/

message = "post-build hook#{location} failed for #{spec.full_name}"
        raise Gem::InstallError, message
      end
    end
  end

def run_post_install_hooks # :nodoc:
    Gem.post_install_hooks.each do |hook|
      hook.call self
    end
  end

##
  #
  # Return an Array of Specifications contained within the gem_home
  # we'll be installing into.

def installed_specs
    @specs ||= begin
      specs = []

Gem::Util.glob_files_in_dir("*.gemspec", File.join(gem_home, "specifications")).each do |path|
        spec = Gem::Specification.load path.tap(&Gem::UNTAINT)
        specs << spec if spec
      end

specs
    end
  end

##
  # Ensure that the dependency is satisfied by the current installation of
  # gem.  If it is not an exception is raised.
  #
  # spec       :: Gem::Specification
  # dependency :: Gem::Dependency

def ensure_dependency(spec, dependency)
    unless installation_satisfies_dependency? dependency
      raise Gem::InstallError, "#{spec.name} requires #{dependency}"
    end
    true
  end

##
  # True if the gems in the system satisfy +dependency+.

def installation_satisfies_dependency?(dependency)
    return true if @options[:development] and dependency.type == :development
    return true if installed_specs.detect { |s| dependency.matches_spec? s }
    return false if @only_install_dir
    not dependency.matching_specs.empty?
  end

##
  # Unpacks the gem into the given directory.

def unpack(directory)
    @gem_dir = directory
    extract_files
  end
  deprecate :unpack, :none, 2020, 04

##
  # The location of the spec file that is installed.
  #

def spec_file
    File.join gem_home, "specifications", "#{spec.full_name}.gemspec"
  end

##
  # The location of the default spec file for default gems.
  #

def default_spec_file
    File.join Gem.default_specifications_dir, "#{spec.full_name}.gemspec"
  end

##
  # Writes the .gemspec specification (in Ruby) to the gem home's
  # specifications directory.

def write_spec
    File.open spec_file, 'w' do |file|
      spec.installed_by_version = Gem.rubygems_version

file.puts spec.to_ruby_for_cache

file.fsync rescue nil # for filesystems without fsync(2)
    end
  end

##
  # Writes the full .gemspec specification (in Ruby) to the gem home's
  # specifications/default directory.

def write_default_spec
    File.open(default_spec_file, "w") do |file|
      file.puts spec.to_ruby
    end
  end

##
  # Creates windows .bat files for easy running of commands

def generate_windows_script(filename, bindir)
    if Gem.win_platform?
      script_name = formatted_program_filename(filename) + ".bat"
      script_path = File.join bindir, File.basename(script_name)
      File.open script_path, 'w' do |file|
        file.puts windows_stub_script(bindir, filename)
      end

verbose script_path
    end
  end

def generate_bin # :nodoc:
    return if spec.executables.nil? or spec.executables.empty?

begin
      Dir.mkdir @bin_dir, *[options[:dir_mode] && 0755].compact
    rescue SystemCallError
      raise unless File.directory? @bin_dir
    end

raise Gem::FilePermissionError.new(@bin_dir) unless File.writable? @bin_dir

spec.executables.each do |filename|
      filename.tap(&Gem::UNTAINT)
      bin_path = File.join gem_dir, spec.bindir, filename

unless File.exist? bin_path
        # TODO change this to a more useful warning
        warn "`#{bin_path}` does not exist, maybe `gem pristine #{spec.name}` will fix it?"
        next
      end

mode = File.stat(bin_path).mode
      dir_mode = options[:prog_mode] || (mode | 0111)
      FileUtils.chmod dir_mode, bin_path unless dir_mode == mode

check_executable_overwrite filename

if @wrappers
        generate_bin_script filename, @bin_dir
      else
        generate_bin_symlink filename, @bin_dir
      end

end
  end

##
  # Creates the scripts to run the applications in the gem.
  #--
  # The Windows script is generated in addition to the regular one due to a
  # bug or misfeature in the Windows shell's pipe.  See
  # http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/193379

def generate_bin_script(filename, bindir)
    bin_script_path = File.join bindir, formatted_program_filename(filename)

FileUtils.rm_f bin_script_path # prior install may have been --no-wrappers

File.open bin_script_path, 'wb', 0755 do |file|
      file.print app_script_text(filename)
      file.chmod(options[:prog_mode] || 0755)
    end

verbose bin_script_path

generate_windows_script filename, bindir
  end

##
  # Creates the symlinks to run the applications in the gem.  Moves
  # the symlink if the gem being installed has a newer version.

def generate_bin_symlink(filename, bindir)
    src = File.join gem_dir, spec.bindir, filename
    dst = File.join bindir, formatted_program_filename(filename)

if File.exist? dst
      if File.symlink? dst
        link = File.readlink(dst).split File::SEPARATOR
        cur_version = Gem::Version.create(link[-3].sub(/^.*-/, ''))
        return if spec.version < cur_version
      end
      File.unlink dst
    end

FileUtils.symlink src, dst, :verbose => Gem.configuration.really_verbose
  rescue NotImplementedError, SystemCallError
    alert_warning "Unable to use symlinks, installing wrapper"
    generate_bin_script filename, bindir
  end

##
  # Generates a #! line for +bin_file_name+'s wrapper copying arguments if
  # necessary.
  #
  # If the :custom_shebang config is set, then it is used as a template
  # for how to create the shebang used for to run a gem's executables.
  #
  # The template supports 4 expansions:
  #
  #  $env    the path to the unix env utility
  #  $ruby   the path to the currently running ruby interpreter
  #  $exec   the path to the gem's executable
  #  $name   the name of the gem the executable is for
  #

def shebang(bin_file_name)
    ruby_name = RbConfig::CONFIG['ruby_install_name'] if @env_shebang
    path = File.join gem_dir, spec.bindir, bin_file_name
    first_line = File.open(path, "rb") {|file| file.gets}

if /\A#!/ =~ first_line
      # Preserve extra words on shebang line, like "-w".  Thanks RPA.
      shebang = first_line.sub(/\A\#!.*?ruby\S*((\s+\S+)+)/, "#!#{Gem.ruby}")
      opts = $1
      shebang.strip! # Avoid nasty ^M issues.
    end

if which = Gem.configuration[:custom_shebang]
      # replace bin_file_name with "ruby" to avoid endless loops
      which = which.gsub(/ #{bin_file_name}$/," #{RbConfig::CONFIG['ruby_install_name']}")

which = which.gsub(/\$(\w+)/) do
        case $1
        when "env"
          @env_path ||= ENV_PATHS.find {|env_path| File.executable? env_path }
        when "ruby"
          "#{Gem.ruby}#{opts}"
        when "exec"
          bin_file_name
        when "name"
          spec.name
        end
      end

"#!#{which}"
    elsif not ruby_name
      "#!#{Gem.ruby}#{opts}"
    elsif opts
      "#!/bin/sh\n'exec' #{ruby_name.dump} '-x' \"$0\" \"$@\"\n#{shebang}"
    else
      # Create a plain shebang line.
      @env_path ||= ENV_PATHS.find {|env_path| File.executable? env_path }
      "#!#{@env_path} #{ruby_name}"
    end
  end

##
  # Ensures the Gem::Specification written out for this gem is loadable upon
  # installation.

def ensure_loadable_spec
    ruby = spec.to_ruby_for_cache
    ruby.tap(&Gem::UNTAINT)

begin
      eval ruby
    rescue StandardError, SyntaxError => e
      raise Gem::InstallError,
            "The specification for #{spec.full_name} is corrupt (#{e.class})"
    end
  end

def ensure_required_ruby_version_met # :nodoc:
    if rrv = spec.required_ruby_version
      ruby_version = Gem.ruby_version
      unless rrv.satisfied_by? ruby_version
        raise Gem::RuntimeRequirementNotMetError,
          "#{spec.name} requires Ruby version #{rrv}. The current ruby version is #{ruby_version}."
      end
    end
  end

def ensure_required_rubygems_version_met # :nodoc:
    if rrgv = spec.required_rubygems_version
      unless rrgv.satisfied_by? Gem.rubygems_version
        rg_version = Gem::VERSION
        raise Gem::RuntimeRequirementNotMetError,
          "#{spec.name} requires RubyGems version #{rrgv}. The current RubyGems version is #{rg_version}. " +
          "Try 'gem update --system' to update RubyGems itself."
      end
    end
  end

def ensure_dependencies_met # :nodoc:
    deps = spec.runtime_dependencies
    deps |= spec.development_dependencies if @development

deps.each do |dep_gem|
      ensure_dependency spec, dep_gem
    end
  end

def process_options # :nodoc:
    @options = {
      :bin_dir      => nil,
      :env_shebang  => false,
      :force        => false,
      :only_install_dir => false,
      :post_install_message => true
    }.merge options

@env_shebang         = options[:env_shebang]
    @force               = options[:force]
    @install_dir         = options[:install_dir]
    @gem_home            = options[:install_dir] || Gem.dir
    @ignore_dependencies = options[:ignore_dependencies]
    @format_executable   = options[:format_executable]
    @wrappers            = options[:wrappers]
    @only_install_dir    = options[:only_install_dir]

# If the user has asked for the gem to be installed in a directory that is
    # the system gem directory, then use the system bin directory, else create
    # (or use) a new bin dir under the gem_home.
    @bin_dir             = options[:bin_dir] || Gem.bindir(gem_home)
    @development         = options[:development]
    @build_root          = options[:build_root]

@build_args = options[:build_args] || Gem::Command.build_args

unless @build_root.nil?
      require 'pathname'
      @build_root = Pathname.new(@build_root).expand_path
      @bin_dir = File.join(@build_root, options[:bin_dir] || Gem.bindir(@gem_home))
      @gem_home = File.join(@build_root, @gem_home)
      alert_warning "You build with buildroot.\n  Build root: #{@build_root}\n  Bin dir: #{@bin_dir}\n  Gem home: #{@gem_home}"
    end
  end

def check_that_user_bin_dir_is_in_path # :nodoc:
    user_bin_dir = @bin_dir || Gem.bindir(gem_home)
    user_bin_dir = user_bin_dir.gsub(File::SEPARATOR, File::ALT_SEPARATOR) if
      File::ALT_SEPARATOR

path = ENV['PATH']
    if Gem.win_platform?
      path = path.downcase
      user_bin_dir = user_bin_dir.downcase
    end

path = path.split(File::PATH_SEPARATOR)

unless path.include? user_bin_dir
      unless !Gem.win_platform? && (path.include? user_bin_dir.sub(ENV['HOME'], '~'))
        unless self.class.path_warning
          alert_warning "You don't have #{user_bin_dir} in your PATH,\n\t  gem executables will not run."
          self.class.path_warning = true
        end
      end
    end
  end

def verify_gem_home # :nodoc:
    FileUtils.mkdir_p gem_home, :mode => options[:dir_mode] && 0755
    raise Gem::FilePermissionError, gem_home unless File.writable?(gem_home)
  end

def verify_spec
    unless spec.name =~ Gem::Specification::VALID_NAME_PATTERN
      raise Gem::InstallError, "#{spec} has an invalid name"
    end

if spec.raw_require_paths.any?{|path| path =~ /\R/ }
      raise Gem::InstallError, "#{spec} has an invalid require_paths"
    end

if spec.extensions.any?{|ext| ext =~ /\R/ }
      raise Gem::InstallError, "#{spec} has an invalid extensions"
    end

unless spec.specification_version.to_s =~ /\A\d+\z/
      raise Gem::InstallError, "#{spec} has an invalid specification_version"
    end

if spec.dependencies.any? {|dep| dep.type != :runtime && dep.type != :development }
      raise Gem::InstallError, "#{spec} has an invalid dependencies"
    end

if spec.dependencies.any? {|dep| dep.name =~ /(?:\R|[<>])/ }
      raise Gem::InstallError, "#{spec} has an invalid dependencies"
    end
  end

##
  # Return the text for an application file.

def app_script_text(bin_file_name)
    # note that the `load` lines cannot be indented, as old RG versions match
    # against the beginning of the line
    return <<-TEXT
#{shebang bin_file_name}
#
# This file was generated by RubyGems.
#
# The application '#{spec.name}' is installed as part of a gem, and
# this file is here to facilitate running it.
#

require 'rubygems'

version = "#{Gem::Requirement.default_prerelease}"

str = ARGV.first
if str
  str = str.b[/\\A_(.*)_\\z/, 1]
  if str and Gem::Version.correct?(str)
    version = str
    ARGV.shift
  end
end

if Gem.respond_to?(:activate_bin_path)
load Gem.activate_bin_path('#{spec.name}', '#{bin_file_name}', version)
else
gem #{spec.name.dump}, version
load Gem.bin_path(#{spec.name.dump}, #{bin_file_name.dump}, version)
end
TEXT
  end

##
  # return the stub script text used to launch the true Ruby script

def windows_stub_script(bindir, bin_file_name)
    rb_config = RbConfig::CONFIG
    rb_topdir = RbConfig::TOPDIR || File.dirname(rb_config["bindir"])

# get ruby executable file name from RbConfig
    ruby_exe = "#{rb_config['RUBY_INSTALL_NAME']}#{rb_config['EXEEXT']}"
    ruby_exe = "ruby.exe" if ruby_exe.empty?

if File.exist?(File.join bindir, ruby_exe)
      # stub & ruby.exe withing same folder.  Portable
      <<-TEXT
@ECHO OFF
@"%~dp0#{ruby_exe}" "%~dpn0" %*
      TEXT
    elsif bindir.downcase.start_with? rb_topdir.downcase
      # stub within ruby folder, but not standard bin.  Portable
      require 'pathname'
      from = Pathname.new bindir
      to   = Pathname.new "#{rb_topdir}/bin"
      rel  = to.relative_path_from from
      <<-TEXT
@ECHO OFF
@"%~dp0#{rel}/#{ruby_exe}" "%~dpn0" %*
      TEXT
    else
      # outside ruby folder, maybe -user-install or bundler.  Portable, but ruby
      # is dependent on PATH
      <<-TEXT
@ECHO OFF
@#{ruby_exe} "%~dpn0" %*
      TEXT
    end
  end
  ##
  # Builds extensions.  Valid types of extensions are extconf.rb files,
  # configure scripts and rakefiles or mkrf_conf files.

def build_extensions
    builder = Gem::Ext::Builder.new spec, @build_args

builder.build_extensions
  end

##
  # Logs the build +output+ in +build_dir+, then raises Gem::Ext::BuildError.
  #
  # TODO:  Delete this for RubyGems 4.  It remains for API compatibility

def extension_build_error(build_dir, output, backtrace = nil) # :nodoc:
    builder = Gem::Ext::Builder.new spec, @build_args

builder.build_error build_dir, output, backtrace
  end
  deprecate :extension_build_error, :none, 2018, 12

##
  # Reads the file index and extracts each file into the gem directory.
  #
  # Ensures that files can't be installed outside the gem directory.

def extract_files
    @package.extract_files gem_dir
  end

##
  # Extracts only the bin/ files from the gem into the gem directory.
  # This is used by default gems to allow a gem-aware stub to function
  # without the full gem installed.

def extract_bin
    @package.extract_files gem_dir, "#{spec.bindir}/*"
  end

##
  # Prefix and suffix the program filename the same as ruby.

def formatted_program_filename(filename)
    if @format_executable
      self.class.exec_format % File.basename(filename)
    else
      filename
    end
  end

##
  #
  # Return the target directory where the gem is to be installed. This
  # directory is not guaranteed to be populated.
  #

def dir
    gem_dir.to_s
  end

##
  # Performs various checks before installing the gem such as the install
  # repository is writable and its directories exist, required Ruby and
  # rubygems versions are met and that dependencies are installed.
  #
  # Version and dependency checks are skipped if this install is forced.
  #
  # The dependent check will be skipped if the install is ignoring dependencies.

def pre_install_checks
    verify_gem_home

# The name and require_paths must be verified first, since it could contain
    # ruby code that would be eval'ed in #ensure_loadable_spec
    verify_spec

ensure_loadable_spec

if options[:install_as_default]
      Gem.ensure_default_gem_subdirectories gem_home
    else
      Gem.ensure_gem_subdirectories gem_home
    end

return true if @force

ensure_required_ruby_version_met
    ensure_required_rubygems_version_met
    ensure_dependencies_met unless @ignore_dependencies

true
  end

##
  # Writes the file containing the arguments for building this gem's
  # extensions.

def write_build_info_file
    return if @build_args.empty?

build_info_dir = File.join gem_home, 'build_info'

dir_mode = options[:dir_mode]
    FileUtils.mkdir_p build_info_dir, :mode => dir_mode && 0755

build_info_file = File.join build_info_dir, "#{spec.full_name}.info"

File.open build_info_file, 'w' do |io|
      @build_args.each do |arg|
        io.puts arg
      end
    end

File.chmod(dir_mode, build_info_dir) if dir_mode
  end

##
  # Writes the .gem file to the cache directory

def write_cache_file
    cache_file = File.join gem_home, 'cache', spec.file_name
    @package.copy_to cache_file
  end

end

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