Class: Gem::Installer

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain: self, UserInteraction, DefaultUserInteraction
Inherits:	Object
Defined in:	lib/rubygems/installer.rb, lib/rubygems/installer_test_case.rb

Overview

The installer installs the files contained in the #gem into the Gem.home.

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 pre_install and post_install for details.

Constant Summary

ENV_PATHS =

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

# File 'lib/rubygems/installer.rb', line 33
```
%w[/usr/bin/env /bin/env]
```

Class Attribute Summary

.exec_format rw

Defaults to use Ruby's program prefix and suffix.
.exec_format=(value) rw

Overrides the executable format.
.path_warning rw

True if we've warned about PATH not including bindir
.install_lock readonly

Certain aspects of the install process are not thread-safe.

Class Method Summary

.new(gem, options = {}) ⇒ Installer constructor

Constructs an Installer instance that will install the gem located at #gem.

Instance Attribute Summary

#bin_dir rw

The directory a gem's executables will be installed into.
#bin_dir=(value) rw

Available through requiring rubygems/installer_test_case.
#gem_dir rw

Lazy accessor for the spec's gem directory.
#gem_dir=(value) rw

Available through requiring rubygems/installer_test_case.
#gem_home rw

The gem repository the gem will be installed into.
#gem_home=(value) rw

Available through requiring rubygems/installer_test_case.
#spec rw

Lazy accessor for the installer's spec.
#spec=(value) rw

Sets the specification for .gem-less installs.
#gem readonly

Filename of the gem being installed.
#options readonly

The options passed when the Installer was instantiated.
#build_args=(value) writeonly

Available through requiring rubygems/installer_test_case.
#env_shebang=(value) writeonly

Available through requiring rubygems/installer_test_case.
#force=(value) writeonly

Available through requiring rubygems/installer_test_case.
#format=(value) writeonly

Available through requiring rubygems/installer_test_case.
#format_executable=(value) writeonly

Available through requiring rubygems/installer_test_case.
#ignore_dependencies=(value) writeonly

Available through requiring rubygems/installer_test_case.
#security_policy=(value) writeonly

Available through requiring rubygems/installer_test_case.
#wrappers=(value) writeonly

Available through requiring rubygems/installer_test_case.

DefaultUserInteraction - Included

#ui	See DefaultUserInteraction.ui
#ui=	See DefaultUserInteraction.ui=

Instance Method Summary

#app_script_text(bin_file_name)

Return the text for an application file.
#build_extensions

Builds extensions.
#default_spec_file

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

Return the target directory where the gem is to be installed.
#ensure_dependency(spec, dependency)

Ensure that the dependency is satisfied by the current installation of gem.
#ensure_loadable_spec

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

Extracts only the bin/ files from the gem into the gem directory.
#extract_files

Reads the file index and extracts each file into the gem directory.
#formatted_program_filename(filename)

Prefix and suffix the program filename the same as ruby.
#generate_bin_script(filename, bindir)

Creates the scripts to run the applications in the gem.
#generate_bin_symlink(filename, bindir)

Creates the symlinks to run the applications in the gem.
#generate_windows_script(filename, bindir)

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

Installs the gem and returns a loaded Specification for the installed gem.
#installation_satisfies_dependency?(dependency) ⇒ Boolean

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

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

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.
#shebang(bin_file_name)

Generates a #! line for bin_file_name's wrapper copying arguments if necessary.
#spec_file

The location of of the spec file that is installed.
#unpack(directory)

Unpacks the gem into the given directory.
#verify_spec_name
#windows_stub_script(bindir, bin_file_name)

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

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

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

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

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

UserInteraction - Included

#alert	Displays an alert `statement`.
#alert_error	Displays an error `statement` to the error output location.
#alert_warning	Displays a warning `statement` to the warning output location.
#ask	Asks a `question` and returns the answer.
#ask_for_password	Asks for a password with a `prompt`
#ask_yes_no	Asks a yes or no `question`.
#choose_from_list	Asks the user to answer `question` with an answer from the given `list`.
#say	Displays the given `statement` on the standard output (or equivalent).
#terminate_interaction	Terminates the RubyGems process with the given `exit_code`
#verbose	Calls `say` with `msg` or the results of the block if really_verbose is true.

DefaultUserInteraction - Included

#use_ui

See DefaultUserInteraction.use_ui

Constructor Details

.new(gem, options = {}) ⇒ `Installer`

Constructs an Installer instance that will install the gem located at #gem. #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 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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 125


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

  @gem = gem
  @options = options
  @package = Gem::Package.new @gem

  process_options

  @package.security_policy = @security_policy

  if options[:user_install] and not options[:unpack] then
    @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

Class Attribute Details

.exec_format (rw)

Defaults to use Ruby's program prefix and suffix.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 96


def exec_format
  @exec_format ||= Gem.default_exec_format
end

.exec_format=(value) (rw)

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”.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 93


attr_writer :exec_format

.install_lock (readonly)

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.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 84


attr_reader :install_lock

.path_warning (rw)

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 78


attr_accessor :path_warning

Instance Attribute Details

#bin_dir (rw)

The directory a gem's executables will be installed into

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 50


attr_reader :bin_dir

#bin_dir=(value) (rw)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 9


attr_writer :bin_dir

#build_args=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 14


attr_writer :build_args

#env_shebang=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 39


attr_writer :env_shebang

#force=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 24


attr_writer :force

#format=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 29


attr_writer :format

#format_executable=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 49


attr_writer :format_executable

#gem (readonly)

Filename of the gem being installed.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 45


attr_reader :gem

#gem_dir (rw)

Lazy accessor for the spec's gem directory.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 206


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

#gem_dir=(value) (rw)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 19


attr_writer :gem_dir

#gem_home (rw)

The gem repository the gem will be installed into

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 57


attr_reader :gem_home

#gem_home=(value) (rw)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 34


attr_writer :gem_home

#ignore_dependencies=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 44


attr_writer :ignore_dependencies

#options (readonly)

The options passed when the Installer was instantiated.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 62


attr_reader :options

#security_policy=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 54


attr_writer :security_policy

#spec (rw)

Lazy accessor for the installer's spec.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 213


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

#spec=(value) (rw)

Sets the specification for .gem-less installs.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 67


attr_writer :spec

#wrappers=(value) (writeonly)

Available through requiring rubygems/installer_test_case

[ GitHub ]

# File 'lib/rubygems/installer_test_case.rb', line 59


attr_writer :wrappers

Instance Method Details

#app_script_text(bin_file_name)

Return the text for an application file.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 657


def app_script_text(bin_file_name)
  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}"

if ARGV.first
str = ARGV.first
str = str.dup.force_encoding("BINARY") if str.respond_to? :force_encoding
if str =~ /\\A_(.*)_\\z/ and Gem::Version.correct?($1) then
  version = $1
  ARGV.shift
end
end

gem '#{spec.name}', version
load Gem.bin_path('#{spec.name}', '#{bin_file_name}', version)
TEXT
end

#build_extensions

Builds extensions. Valid types of extensions are extconf.rb files, configure scripts and rakefiles or mkrf_conf files.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 704


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

  builder.build_extensions
end

#default_spec_file

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 365


def default_spec_file
  File.join gem_home, "specifications/default", "#{spec.full_name}.gemspec"
end

#dir

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 756


def dir
  gem_dir.to_s
end

#ensure_dependency(spec, dependency)

Ensure that the dependency is satisfied by the current installation of gem. If it is not an exception is raised.

spec: Specification
dependency: Dependency

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 328


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

#ensure_loadable_spec

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 545


def ensure_loadable_spec
  ruby = spec.to_ruby_for_cache
  ruby.untaint

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

#extract_bin

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.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 735


def extract_bin
  @package.extract_files gem_dir, "bin/*"
end

#extract_files

Reads the file index and extracts each file into the gem directory.

Ensures that files can't be installed outside the gem directory.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 726


def extract_files
  @package.extract_files gem_dir
end

#formatted_program_filename(filename)

Prefix and suffix the program filename the same as ruby.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 742


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

#generate_bin_script(filename, bindir)

Creates the scripts to run the applications in the gem.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 445


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)
  end

  verbose bin_script_path

  generate_windows_script filename, bindir
end

#generate_bin_symlink(filename, bindir)

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 463


def generate_bin_symlink(filename, bindir)
  if Gem.win_platform? then
    alert_warning "Unable to use symlinks on Windows, installing wrapper"
    generate_bin_script filename, bindir
    return
  end

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

  if File.exist? dst then
    if File.symlink? dst then
      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
end

#generate_windows_script(filename, bindir)

Creates windows .bat files for easy running of commands

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 396


def generate_windows_script(filename, bindir)
  if Gem.win_platform? then
    script_name = 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

#install

Installs the gem and returns a loaded 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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 230


def install
  pre_install_checks

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

  run_pre_install_hooks

  # Completely remove any previous gem files
  FileUtils.rm_rf gem_dir

  FileUtils.mkdir_p gem_dir

  spec.loaded_from = spec_file

  if @options[:install_as_default]
    extract_bin
    write_default_spec
  else
    extract_files

    build_extensions
    write_build_info_file
    run_post_build_hooks

    generate_bin
    write_spec
    write_cache_file
  end

  say spec.post_install_message unless spec.post_install_message.nil?

  Gem::Installer.install_lock.synchronize { Gem::Specification.add_spec spec }

  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

#installation_satisfies_dependency?(dependency) ⇒ `Boolean`

True if the gems in the system satisfy dependency.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 338


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

#installed_specs

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 308


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

    Dir[File.join(gem_home, "specifications", "*.gemspec")].each do |path|
      spec = Gem::Specification.load path.untaint
      specs << spec if spec
    end

    specs
  end
end

#pre_install_checks

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 this install is ignoring dependencies.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 769


def pre_install_checks
  verify_gem_home options[:unpack]

  # If we're forcing the install then disable security unless the security
  # policy says that we only install signed gems.
  @security_policy = nil if
    @force and @security_policy and not @security_policy.only_signed

  ensure_loadable_spec

  verify_spec_name

  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

#shebang(bin_file_name)

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 500


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 then
    # 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 then
    "#!#{Gem.ruby}#{opts}"
  elsif opts then
    "#!/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

#spec_file

The location of of the spec file that is installed.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 357


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

#unpack(directory)

Unpacks the gem into the given directory.

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 348


def unpack(directory)
  @gem_dir = directory
  extract_files
end

#verify_spec_name

Raises:

(Gem::InstallError)

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 649


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

#windows_stub_script(bindir, bin_file_name)

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 688


def windows_stub_script(bindir, bin_file_name)
  ruby = Gem.ruby.gsub(/^\"|\"$/, "").tr(File::SEPARATOR, "\\")
  return <<-TEXT
@ECHO OFF
IF NOT "%~f0" == "~f0" GOTO :WinNT
@"#{ruby}" "#{File.join(bindir, bin_file_name)}" %1 %2 %3 %4 %5 %6 %7 %8 %9
GOTO :EOF
:WinNT
@"#{ruby}" "%~dpn0" %*
TEXT
end

#write_build_info_file

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 800


def write_build_info_file
  return if @build_args.empty?

  build_info_dir = File.join gem_home, 'build_info'

  FileUtils.mkdir_p build_info_dir

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

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

#write_cache_file

Writes the #gem file to the cache directory

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 819


def write_cache_file
  cache_file = File.join gem_home, 'cache', spec.file_name

  FileUtils.cp @gem, cache_file unless File.exist? cache_file
end

#write_default_spec

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 387


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

#write_spec

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

[ GitHub ]

# File 'lib/rubygems/installer.rb', line 373


def write_spec
  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

Class: Gem::Installer

Overview

Constant Summary

Class Attribute Summary

Class Method Summary

Instance Attribute Summary

DefaultUserInteraction - Included

Instance Method Summary

UserInteraction - Included

DefaultUserInteraction - Included

Constructor Details

.new(gem, options = {}) ⇒ Installer

Class Attribute Details

.exec_format (rw)

.exec_format=(value) (rw)

.install_lock (readonly)

.path_warning (rw)

Instance Attribute Details

#bin_dir (rw)

#bin_dir=(value) (rw)

#build_args=(value) (writeonly)

#env_shebang=(value) (writeonly)

#force=(value) (writeonly)

#format=(value) (writeonly)

#format_executable=(value) (writeonly)

#gem (readonly)

#gem_dir (rw)

#gem_dir=(value) (rw)

#gem_home (rw)

#gem_home=(value) (rw)

#ignore_dependencies=(value) (writeonly)

#options (readonly)

#security_policy=(value) (writeonly)

#spec (rw)

#spec=(value) (rw)

#wrappers=(value) (writeonly)

Instance Method Details

#app_script_text(bin_file_name)

#build_extensions

#default_spec_file

#dir

#ensure_dependency(spec, dependency)

#ensure_loadable_spec

#extract_bin

#extract_files

#formatted_program_filename(filename)

#generate_bin_script(filename, bindir)

#generate_bin_symlink(filename, bindir)

#generate_windows_script(filename, bindir)

#install

#installation_satisfies_dependency?(dependency) ⇒ Boolean

#installed_specs

#pre_install_checks

#shebang(bin_file_name)

#spec_file

#unpack(directory)

#verify_spec_name

#windows_stub_script(bindir, bin_file_name)

#write_build_info_file

#write_cache_file

#write_default_spec

#write_spec

.new(gem, options = {}) ⇒ `Installer`

#installation_satisfies_dependency?(dependency) ⇒ `Boolean`