Module: Gem

Defined in:
lib/rubygems.rb,
lib/rubygems.rb,
lib/rubygems/errors.rb,
lib/rubygems/openssl.rb,
lib/rubygems/defaults.rb,
lib/rubygems/safe_yaml.rb,
lib/rubygems/util/list.rb,
lib/rubygems/psych_tree.rb,
lib/rubygems/compatibility.rb,
lib/rubygems/tsort/lib/tsort.rb

Overview

Gem::TSort implements topological sorting using Tarjan's algorithm for strongly connected components.

Gem::TSort is designed to be able to be used with any object which can be interpreted as a directed graph.

Gem::TSort requires two methods to interpret an object as a graph, tsort_each_node and tsort_each_child.

  • tsort_each_node is used to iterate for all nodes over a graph.

  • tsort_each_child is used to iterate for child nodes of a given node.

The equality of nodes are defined by eql? and hash since Gem::TSort uses Hash internally.

A Simple Example

The following example demonstrates how to mix the Gem::TSort module into an existing class (in this case, Hash). Here, we're treating each key in the hash as a node in the graph, and so we simply alias the required #tsort_each_node method to Hash's #each_key method. For each key in the hash, the associated value is an array of the node's child nodes. This choice in turn leads to our implementation of the required #tsort_each_child method, which fetches the array of child nodes and then iterates over that array using the user-supplied block.

require 'rubygems/tsort/lib/tsort'

class Hash
  include Gem::TSort
  alias tsort_each_node each_key
  def tsort_each_child(node, &block)
    fetch(node).each(&block)
  end
end

{1=>[2, 3], 2=>[3], 3=>[], 4=>[]}.tsort
#=> [3, 2, 1, 4]

{1=>[2], 2=>[3, 4], 3=>[2], 4=>[]}.strongly_connected_components
#=> [[4], [2, 3], [1]]

A More Realistic Example

A very simple `make' like tool can be implemented as follows:

require 'rubygems/tsort/lib/tsort'

class Make
  def initialize
    @dep = {}
    @dep.default = []
  end

  def rule(outputs, inputs=[], &block)
    triple = [outputs, inputs, block]
    outputs.each {|f| @dep[f] = [triple]}
    @dep[triple] = inputs
  end

  def build(target)
    each_strongly_connected_component_from(target) {|ns|
      if ns.length != 1
        fs = ns.delete_if {|n| Array === n}
        raise Gem::TSort::Cyclic.new("cyclic dependencies: #{fs.join ', '}")
      end
      n = ns.first
      if Array === n
        outputs, inputs, block = n
        inputs_time = inputs.map {|f| File.mtime f}.max
        begin
          outputs_time = outputs.map {|f| File.mtime f}.min
        rescue Errno::ENOENT
          outputs_time = nil
        end
        if outputs_time == nil ||
           inputs_time != nil && outputs_time <= inputs_time
          sleep 1 if inputs_time != nil && inputs_time.to_i == Time.now.to_i
          block.call
        end
      end
    }
  end

  def tsort_each_child(node, &block)
    @dep[node].each(&block)
  end
  include Gem::TSort
end

def command(arg)
  print arg, "\n"
  system arg
end

m = Make.new
m.rule(%w[t1]) { command 'date > t1' }
m.rule(%w[t2]) { command 'date > t2' }
m.rule(%w[t3]) { command 'date > t3' }
m.rule(%w[t4], %w[t1 t3]) { command 'cat t1 t3 > t4' }
m.rule(%w[t5], %w[t4 t2]) { command 'cat t4 t2 > t5' }
m.build('t5')

Bugs

  • 'tsort.rb' is wrong name because this library uses Tarjan's algorithm for strongly connected components. Although 'strongly_connected_components.rb' is correct but too long.

References

    1. Tarjan, “Depth First Search and Linear Graph Algorithms”,

SIAM Journal on Computing, Vol. 1, No. 2, pp. 146-160, June 1972.

Defined Under Namespace

Modules: BundlerVersionFinder, Commands, DefaultUserInteraction, Deprecate, Ext, GemcutterUtilities, InstallUpdateOptions, InstallerUninstallerUtils, LocalRemoteOptions, QueryUtils, SafeYAML, Security, SecurityOption, TSort, Text, UserInteraction, Util, VersionOption Classes: AvailableSet, BasicSpecification, Command, CommandLineError, CommandManager, ConfigFile, ConflictError, ConsoleUI, Dependency, DependencyError, DependencyInstaller, DependencyList, DependencyRemovalException, DependencyResolutionError, Doctor, DocumentError, EndOfYAMLException, ErrorReason, Exception, FilePermissionError, FormatException, GemNotFoundException, GemNotInHomeException, GemRunner, ImpossibleDependenciesError, Indexer, InstallError, Installer, InvalidSpecificationException, Licenses, List, LoadError, MissingSpecError, MissingSpecVersionError, MockGemUi, NameTuple, NoAliasYAMLTree, OperationNotSupportedError, OptionParser, Package, PackageTask, PathSupport, Platform, PlatformMismatch, RemoteError, RemoteFetcher, RemoteInstallationCancelled, RemoteInstallationSkipped, RemoteSourceException, Request, RequestSet, Requirement, Resolver, RubyVersionMismatch, RuntimeRequirementNotMetError, S3URISigner, SilentUI, Source, SourceFetchProblem, SourceList, SpecFetcher, SpecificGemNotFoundException, Specification, SpecificationPolicy, StreamUI, StubSpecification, SystemExitException, UninstallError, Uninstaller, UnknownCommandError, UnknownCommandSpellChecker, UnsatisfiableDependencyError, Uri, UriFormatter, Validator, VerificationError, Version

Constant Summary collapse

VERSION = 
"3.3.25".freeze
RUBYGEMS_DIR = 
__dir__
UNTAINT =

Taint support is deprecated in Ruby 2.7. This allows switching “.untaint” to “.tap(&Gem::UNTAINT)”, to avoid deprecation warnings in Ruby 2.7.

RUBY_VERSION < "2.7" ? :untaint.to_sym : proc {}
KERNEL_WARN_IGNORES_INTERNAL_ENTRIES =

When bugs.ruby-lang.org/issues/17259 is available, there is no need to override Kernel#warn

RUBY_ENGINE == "truffleruby" ||
(RUBY_ENGINE == "ruby" && RUBY_VERSION >= "3.0")
WIN_PATTERNS =

An Array of Regexps that match windows Ruby platforms.

[
  /bccwin/i,
  /cygwin/i,
  /djgpp/i,
  /mingw/i,
  /mswin/i,
  /wince/i,
].freeze
GEM_DEP_FILES = 
%w[
  gem.deps.rb
  gems.rb
  Gemfile
  Isolate
].freeze
REPOSITORY_SUBDIRECTORIES =

Subdirectories in a gem repository

%w[
  build_info
  cache
  doc
  extensions
  gems
  plugins
  specifications
].freeze
REPOSITORY_DEFAULT_GEM_SUBDIRECTORIES =

Subdirectories in a gem repository for default gems

%w[
  gems
  specifications/default
].freeze
LOADED_SPECS_MUTEX = 
Thread::Mutex.new
MARSHAL_SPEC_DIR =

Location of Marshal quick gemspecs on remote repositories

"quick/Marshal.#{Gem.marshal_version}/".freeze
HAVE_OPENSSL =

:nodoc:

defined? OpenSSL::SSL # :nodoc:
DEFAULT_HOST = 
"https://rubygems.org".freeze
UnsatisfiableDepedencyError =

Backwards compatible typo'd exception class for early RubyGems 2.0.x

Gem::UnsatisfiableDependencyError
RubyGemsVersion =

:stopdoc:

VERSION
RbConfigPriorities = 
%w[
  MAJOR
  MINOR
  TEENY
  EXEEXT RUBY_SO_NAME arch bindir datadir libdir ruby_install_name
  ruby_version rubylibprefix sitedir sitelibdir vendordir vendorlibdir
  rubylibdir
].freeze
ConfigMap =

Configuration settings from ::RbConfig

Hash.new do |cm, key|
  cm[key] = RbConfig::CONFIG[key.to_s]
end
@@win_platform = 
nil

Class Attribute Summary collapse

Class Method Summary collapse

Class Attribute Details

.disable_system_update_message ⇒ Object

RubyGems distributors (like operating system package managers) can disable RubyGems update by setting this to error message printed to end-users on gem update –system instead of actual update.



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# File 'lib/rubygems.rb', line 1166

def disable_system_update_message
  @disable_system_update_message
end

.done_installing_hooks ⇒ Object (readonly)

The list of hooks to be run after Gem::DependencyInstaller installs a set of gems



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# File 'lib/rubygems.rb', line 1244

def done_installing_hooks
  @done_installing_hooks
end

.gemdeps ⇒ Object (readonly)

GemDependencyAPI object, which is set when .use_gemdeps is called. This contains all the information from the Gemfile.



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# File 'lib/rubygems.rb', line 1177

def gemdeps
  @gemdeps
end

.loaded_specs ⇒ Object (readonly)

Hash of loaded Gem::Specification keyed by name



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# File 'lib/rubygems.rb', line 1171

def loaded_specs
  @loaded_specs
end

.post_build_hooks ⇒ Object (readonly)

The list of hooks to be run after Gem::Installer#install extracts files and builds extensions



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# File 'lib/rubygems.rb', line 1232

def post_build_hooks
  @post_build_hooks
end

.post_install_hooks ⇒ Object (readonly)

The list of hooks to be run after Gem::Installer#install completes installation



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# File 'lib/rubygems.rb', line 1238

def post_install_hooks
  @post_install_hooks
end

.post_reset_hooks ⇒ Object (readonly)

The list of hooks to be run after Gem::Specification.reset is run.



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# File 'lib/rubygems.rb', line 1249

def post_reset_hooks
  @post_reset_hooks
end

.post_uninstall_hooks ⇒ Object (readonly)

The list of hooks to be run after Gem::Uninstaller#uninstall completes installation



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# File 'lib/rubygems.rb', line 1255

def post_uninstall_hooks
  @post_uninstall_hooks
end

.pre_install_hooks ⇒ Object (readonly)

The list of hooks to be run before Gem::Installer#install does any work



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# File 'lib/rubygems.rb', line 1260

def pre_install_hooks
  @pre_install_hooks
end

.pre_reset_hooks ⇒ Object (readonly)

The list of hooks to be run before Gem::Specification.reset is run.



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# File 'lib/rubygems.rb', line 1265

def pre_reset_hooks
  @pre_reset_hooks
end

.pre_uninstall_hooks ⇒ Object (readonly)

The list of hooks to be run before Gem::Uninstaller#uninstall does any work



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# File 'lib/rubygems.rb', line 1271

def pre_uninstall_hooks
  @pre_uninstall_hooks
end

Class Method Details

.activate_bin_path(name, exec_name = nil, *requirements) ⇒ Object

Find the full path to the executable for gem name. If the exec_name is not given, an exception will be raised, otherwise the specified executable's path is returned. requirements allows you to specify specific gem versions.

A side effect of this method is that it will activate the gem that contains the executable.

This method should only be used in bin stub files.



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# File 'lib/rubygems.rb', line 283

def self.activate_bin_path(name, exec_name = nil, *requirements) # :nodoc:
  spec = find_spec_for_exe name, exec_name, requirements
  Gem::LOADED_SPECS_MUTEX.synchronize do
    spec.activate
    finish_resolve
  end
  spec.bin_file exec_name
end

.activated_gem_paths ⇒ Object

The number of paths in the $LOAD_PATH from activated gems. Used to prioritize -I and ENV entries during require.



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# File 'lib/rubygems.rb', line 588

def self.activated_gem_paths
  @activated_gem_paths ||= 0
end

.add_to_load_path(*paths) ⇒ Object

Add a list of paths to the $LOAD_PATH at the proper place.



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# File 'lib/rubygems.rb', line 595

def self.add_to_load_path(*paths)
  @activated_gem_paths = activated_gem_paths + paths.size

  # gem directories must come after -I and ENV['RUBYLIB']
  $LOAD_PATH.insert(Gem.load_path_insert_index, *paths)
end

.bin_path(name, exec_name = nil, *requirements) ⇒ Object

Find the full path to the executable for gem name. If the exec_name is not given, an exception will be raised, otherwise the specified executable's path is returned. requirements allows you to specify specific gem versions.



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# File 'lib/rubygems.rb', line 241

def self.bin_path(name, exec_name = nil, *requirements)
  requirements = Gem::Requirement.default if
    requirements.empty?

  find_spec_for_exe(name, exec_name, requirements).bin_file exec_name
end

.binary_mode ⇒ Object

The mode needed to read a file as straight binary.



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# File 'lib/rubygems.rb', line 295

def self.binary_mode
  "rb"
end

.bindir(install_dir = Gem.dir) ⇒ Object

The path where gem executables are to be installed.



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# File 'lib/rubygems.rb', line 302

def self.bindir(install_dir=Gem.dir)
  return File.join install_dir, "bin" unless
    install_dir.to_s == Gem.default_dir.to_s
  Gem.default_bindir
end

.cache_home ⇒ Object

The path to standard location of the user's cache directory.



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# File 'lib/rubygems/defaults.rb', line 139

def self.cache_home
  @cache_home ||= (ENV["XDG_CACHE_HOME"] || File.join(Gem.user_home, ".cache"))
end

.clear_default_specs ⇒ Object

Clear default gem related variables. It is for test



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# File 'lib/rubygems.rb', line 1224

def clear_default_specs
  @path_to_default_spec_map.clear
end

.clear_paths ⇒ Object

Reset the dir and path values. The next time dir or path is requested, the values will be calculated from scratch. This is mainly used by the unit tests to provide test isolation.



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# File 'lib/rubygems.rb', line 320

def self.clear_paths
  @paths         = nil
  @user_home     = nil
  Gem::Specification.reset
  Gem::Security.reset if defined?(Gem::Security)
end

.config_file ⇒ Object

The path to standard location of the user's .gemrc file.



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# File 'lib/rubygems/defaults.rb', line 132

def self.config_file
  @config_file ||= find_config_file.tap(&Gem::UNTAINT)
end

.config_home ⇒ Object

The path to standard location of the user's configuration directory.



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# File 'lib/rubygems/defaults.rb', line 113

def self.config_home
  @config_home ||= (ENV["XDG_CONFIG_HOME"] || File.join(Gem.user_home, ".config"))
end

.configuration ⇒ Object

The standard configuration object for gems.



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# File 'lib/rubygems.rb', line 330

def self.configuration
  @configuration ||= Gem::ConfigFile.new []
end

.configuration=(config) ⇒ Object

Use the given configuration object (which implements the ConfigFile protocol) as the standard configuration object.



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

def self.configuration=(config)
  @configuration = config
end

.data_home ⇒ Object

The path to standard location of the user's data directory.



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# File 'lib/rubygems/defaults.rb', line 146

def self.data_home
  @data_home ||= (ENV["XDG_DATA_HOME"] || File.join(Gem.user_home, ".local", "share"))
end

.datadir(gem_name) ⇒ Object

The path to the data directory specified by the gem name. If the package is not available as a gem, return nil.



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# File 'lib/rubygems.rb', line 346

def self.datadir(gem_name)
  spec = @loaded_specs[gem_name]
  return nil if spec.nil?
  spec.datadir
end

.default_bindir ⇒ Object

The default directory for binaries



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# File 'lib/rubygems/defaults.rb', line 185

def self.default_bindir
  RbConfig::CONFIG["bindir"]
end

.default_cert_path ⇒ Object

The default signing certificate chain path



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# File 'lib/rubygems/defaults.rb', line 209

def self.default_cert_path
  default_cert_path = File.join Gem.user_home, ".gem", "gem-public_cert.pem"

  unless File.exist?(default_cert_path)
    default_cert_path = File.join Gem.data_home, "gem", "gem-public_cert.pem"
  end

  default_cert_path
end

.default_dir ⇒ Object

Default home directory path to be used if an alternate value is not specified in the environment



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# File 'lib/rubygems/defaults.rb', line 36

def self.default_dir
  @default_dir ||= File.join(RbConfig::CONFIG["rubylibprefix"], "gems", RbConfig::CONFIG["ruby_version"])
end

.default_exec_format ⇒ Object

Deduce Ruby's –program-prefix and –program-suffix from its install name



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# File 'lib/rubygems/defaults.rb', line 171

def self.default_exec_format
  exec_format = RbConfig::CONFIG["ruby_install_name"].sub("ruby", "%s") rescue "%s"

  unless exec_format =~ /%s/
    raise Gem::Exception,
      "[BUG] invalid exec_format #{exec_format.inspect}, no %s"
  end

  exec_format
end

.default_ext_dir_for(base_dir) ⇒ Object

Returns binary extensions dir for specified RubyGems base dir or nil if such directory cannot be determined.

By default, the binary extensions are located side by side with their Ruby counterparts, therefore nil is returned



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# File 'lib/rubygems/defaults.rb', line 47

def self.default_ext_dir_for(base_dir)
  nil
end

.default_key_path ⇒ Object

The default signing key path



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# File 'lib/rubygems/defaults.rb', line 196

def self.default_key_path
  default_key_path = File.join Gem.user_home, ".gem", "gem-private_key.pem"

  unless File.exist?(default_key_path)
    default_key_path = File.join Gem.data_home, "gem", "gem-private_key.pem"
  end

  default_key_path
end

.default_path ⇒ Object

Default gem load path



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# File 'lib/rubygems/defaults.rb', line 160

def self.default_path
  path = []
  path << user_dir if user_home && File.exist?(user_home)
  path << default_dir
  path << vendor_dir if vendor_dir && File.directory?(vendor_dir)
  path
end

.default_rubygems_dirs ⇒ Object

Paths where RubyGems' .rb files and bin files are installed



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

def self.default_rubygems_dirs
  nil # default to standard layout
end

.default_sources ⇒ Object

An Array of the default sources that come with RubyGems



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

def self.default_sources
  %w[https://rubygems.org/]
end

.default_spec_cache_dir ⇒ Object

Default spec directory path to be used if an alternate value is not specified in the environment



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# File 'lib/rubygems/defaults.rb', line 22

def self.default_spec_cache_dir
  default_spec_cache_dir = File.join Gem.user_home, ".gem", "specs"

  unless File.exist?(default_spec_cache_dir)
    default_spec_cache_dir = File.join Gem.data_home, "gem", "specs"
  end

  default_spec_cache_dir
end

.default_specifications_dir ⇒ Object

Path to specification files of default gems.



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# File 'lib/rubygems/defaults.rb', line 61

def self.default_specifications_dir
  @default_specifications_dir ||= File.join(Gem.default_dir, "specifications", "default")
end

.deflate(data) ⇒ Object

A Zlib::Deflate.deflate wrapper



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# File 'lib/rubygems.rb', line 355

def self.deflate(data)
  require "zlib"
  Zlib::Deflate.deflate data
end

.dir ⇒ Object

The path where gems are to be installed.



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# File 'lib/rubygems.rb', line 403

def self.dir
  paths.home
end

.done_installing(&hook) ⇒ Object

Adds a post-installs hook that will be passed a Gem::DependencyInstaller and a list of installed specifications when Gem::DependencyInstaller#install is complete



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# File 'lib/rubygems.rb', line 689

def self.done_installing(&hook)
  @done_installing_hooks << hook
end

.ensure_default_gem_subdirectories(dir = Gem.dir, mode = nil) ⇒ Object

Quietly ensure the Gem directory dir contains all the proper subdirectories for handling default gems. If we can't create a directory due to a permission problem, then we will silently continue.

If mode is given, missing directories are created with this mode.

World-writable directories will never be created.



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# File 'lib/rubygems.rb', line 437

def self.ensure_default_gem_subdirectories(dir = Gem.dir, mode = nil)
  ensure_subdirectories(dir, mode, REPOSITORY_DEFAULT_GEM_SUBDIRECTORIES)
end

.ensure_gem_subdirectories(dir = Gem.dir, mode = nil) ⇒ Object

Quietly ensure the Gem directory dir contains all the proper subdirectories. If we can't create a directory due to a permission problem, then we will silently continue.

If mode is given, missing directories are created with this mode.

World-writable directories will never be created.



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# File 'lib/rubygems.rb', line 424

def self.ensure_gem_subdirectories(dir = Gem.dir, mode = nil)
  ensure_subdirectories(dir, mode, REPOSITORY_SUBDIRECTORIES)
end

.ensure_subdirectories(dir, mode, subdirs) ⇒ Object

:nodoc:



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# File 'lib/rubygems.rb', line 441

def self.ensure_subdirectories(dir, mode, subdirs) # :nodoc:
  old_umask = File.umask
  File.umask old_umask | 002

  options = {}

  options[:mode] = mode if mode

  subdirs.each do |name|
    subdir = File.join dir, name
    next if File.exist? subdir

    require "fileutils"

    begin
      FileUtils.mkdir_p subdir, **options
    rescue SystemCallError
    end
  end
ensure
  File.umask old_umask
end

.env_requirement(gem_name) ⇒ Object 



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# File 'lib/rubygems.rb', line 822

def self.env_requirement(gem_name)
  @env_requirements_by_name ||= {}
  @env_requirements_by_name[gem_name] ||= begin
    req = ENV["GEM_REQUIREMENT_#{gem_name.upcase}"] || ">= 0".freeze
    Gem::Requirement.create(req)
  end
end

.extension_api_version ⇒ Object

The extension API version of ruby. This includes the static vs non-static distinction as extensions cannot be shared between the two.



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# File 'lib/rubygems.rb', line 468

def self.extension_api_version # :nodoc:
  if "no" == RbConfig::CONFIG["ENABLE_SHARED"]
    "#{ruby_api_version}-static"
  else
    ruby_api_version
  end
end

.find_config_file ⇒ Object

Finds the user's config file



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# File 'lib/rubygems/defaults.rb', line 120

def self.find_config_file
  gemrc = File.join Gem.user_home, ".gemrc"
  if File.exist? gemrc
    gemrc
  else
    File.join Gem.config_home, "gem", "gemrc"
  end
end

.find_files(glob, check_load_path = true) ⇒ Object

Returns a list of paths matching glob that can be used by a gem to pick up features from other gems. For example:

Gem.find_files('rdoc/discover').each do |path| load path end

if check_load_path is true (the default), then find_files also searches $LOAD_PATH for files as well as gems.

Note that find_files will return all files even if they are from different versions of the same gem. See also find_latest_files



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# File 'lib/rubygems.rb', line 488

def self.find_files(glob, check_load_path=true)
  files = []

  files = find_files_from_load_path glob if check_load_path

  gem_specifications = @gemdeps ? Gem.loaded_specs.values : Gem::Specification.stubs

  files.concat gem_specifications.map {|spec|
    spec.matches_for_glob("#{glob}#{Gem.suffix_pattern}")
  }.flatten

  # $LOAD_PATH might contain duplicate entries or reference
  # the spec dirs directly, so we prune.
  files.uniq! if check_load_path

  return files
end

.find_files_from_load_path(glob) ⇒ Object

:nodoc:



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# File 'lib/rubygems.rb', line 506

def self.find_files_from_load_path(glob) # :nodoc:
  glob_with_suffixes = "#{glob}#{Gem.suffix_pattern}"
  $LOAD_PATH.map do |load_path|
    Gem::Util.glob_files_in_dir(glob_with_suffixes, load_path)
  end.flatten.select {|file| File.file? file.tap(&Gem::UNTAINT) }
end

.find_latest_files(glob, check_load_path = true) ⇒ Object

Returns a list of paths matching glob from the latest gems that can be used by a gem to pick up features from other gems. For example:

Gem.find_latest_files('rdoc/discover').each do |path| load path end

if check_load_path is true (the default), then find_latest_files also searches $LOAD_PATH for files as well as gems.

Unlike find_files, find_latest_files will return only files from the latest version of a gem.



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# File 'lib/rubygems.rb', line 525

def self.find_latest_files(glob, check_load_path=true)
  files = []

  files = find_files_from_load_path glob if check_load_path

  files.concat Gem::Specification.latest_specs(true).map {|spec|
    spec.matches_for_glob("#{glob}#{Gem.suffix_pattern}")
  }.flatten

  # $LOAD_PATH might contain duplicate entries or reference
  # the spec dirs directly, so we prune.
  files.uniq! if check_load_path

  return files
end

.find_unresolved_default_spec(path) ⇒ Object

Find a Gem::Specification of default gem from path



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# File 'lib/rubygems.rb', line 1216

def find_unresolved_default_spec(path)
  default_spec = @path_to_default_spec_map[path]
  return default_spec if default_spec && loaded_specs[default_spec.name] != default_spec
end

.finish_resolve(request_set = Gem::RequestSet.new) ⇒ Object 



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# File 'lib/rubygems.rb', line 226

def self.finish_resolve(request_set=Gem::RequestSet.new)
  request_set.import Gem::Specification.unresolved_deps.values
  request_set.import Gem.loaded_specs.values.map {|s| Gem::Dependency.new(s.name, s.version) }

  request_set.resolve_current.each do |s|
    s.full_spec.activate
  end
end

.host ⇒ Object

Get the default RubyGems API host. This is normally https://rubygems.org.



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# File 'lib/rubygems.rb', line 560

def self.host
  @host ||= Gem::DEFAULT_HOST
end

.host=(host) ⇒ Object

Set the default RubyGems API host.



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# File 'lib/rubygems.rb', line 566

def self.host=(host)
  @host = host
end

.install(name, version = Gem::Requirement.default, *options) ⇒ Object

Top level install helper method. Allows you to install gems interactively:

% irb
>> Gem.install "minitest"
Fetching: minitest-5.14.0.gem (100%)
=> [#<Gem::Specification:0x1013b4528 @name="minitest", ...>]



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# File 'lib/rubygems.rb', line 549

def self.install(name, version = Gem::Requirement.default, *options)
  require_relative "rubygems/dependency_installer"
  inst = Gem::DependencyInstaller.new(*options)
  inst.install name, version
  inst.installed_gems
end

.install_extension_in_lib ⇒ Object

Install extensions into lib as well as into the extension directory.



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# File 'lib/rubygems/defaults.rb', line 222

def self.install_extension_in_lib # :nodoc:
  true
end

.java_platform? ⇒ Boolean

Is this a java platform?

Returns:

  • (Boolean) 


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# File 'lib/rubygems.rb', line 1005

def self.java_platform?
  RUBY_PLATFORM == "java"
end

.latest_rubygems_version ⇒ Object

Returns the latest release version of RubyGems.



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# File 'lib/rubygems.rb', line 847

def self.latest_rubygems_version
  latest_version_for("rubygems-update") ||
    raise("Can't find 'rubygems-update' in any repo. Check `gem source list`.")
end

.latest_spec_for(name) ⇒ Object

Returns the latest release-version specification for the gem name.



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# File 'lib/rubygems.rb', line 834

def self.latest_spec_for(name)
  dependency   = Gem::Dependency.new name
  fetcher      = Gem::SpecFetcher.fetcher
  spec_tuples, = fetcher.spec_for_dependency dependency

  spec, = spec_tuples.last

  spec
end

.latest_version_for(name) ⇒ Object

Returns the version of the latest release-version of gem name



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# File 'lib/rubygems.rb', line 855

def self.latest_version_for(name)
  spec = latest_spec_for name
  spec && spec.version
end

.load_env_plugins ⇒ Object

Find all 'rubygems_plugin' files in $LOAD_PATH and load them



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# File 'lib/rubygems.rb', line 1047

def self.load_env_plugins
  load_plugin_files find_files_from_load_path("rubygems_plugin")
end

.load_path_insert_index ⇒ Object

The index to insert activated gem paths into the $LOAD_PATH. The activated gem's paths are inserted before site lib directory by default.



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# File 'lib/rubygems.rb', line 574

def self.load_path_insert_index
  $LOAD_PATH.each_with_index do |path, i|
    return i if path.instance_variable_defined?(:@gem_prelude_index)
  end

  index = $LOAD_PATH.index RbConfig::CONFIG["sitelibdir"]

  index || 0
end

.load_plugin_files(plugins) ⇒ Object

Load plugins as Ruby files



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# File 'lib/rubygems.rb', line 1019

def self.load_plugin_files(plugins) # :nodoc:
  plugins.each do |plugin|
    # Skip older versions of the GemCutter plugin: Its commands are in
    # RubyGems proper now.

    next if plugin =~ /gemcutter-0\.[0-3]/

    begin
      load plugin
    rescue ::Exception => e
      details = "#{plugin.inspect}: #{e.message} (#{e.class})"
      warn "Error loading RubyGems plugin #{details}"
    end
  end
end

.load_plugins ⇒ Object

Find rubygems plugin files in the standard location and load them



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# File 'lib/rubygems.rb', line 1038

def self.load_plugins
  Gem.path.each do |gem_path|
    load_plugin_files Gem::Util.glob_files_in_dir("*#{Gem.plugin_suffix_pattern}", plugindir(gem_path))
  end
end

.load_yaml ⇒ Object

Loads YAML, preferring Psych



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# File 'lib/rubygems.rb', line 607

def self.load_yaml
  return if @yaml_loaded

  require "psych"
  require_relative "rubygems/psych_tree"

  require_relative "rubygems/safe_yaml"

  @yaml_loaded = true
end

.location_of_caller(depth = 1) ⇒ Object

The file name and line number of the caller of the caller of this method.

depth is how many layers up the call stack it should go.

e.g.,

def a; Gem.location_of_caller; end a #=> [“x.rb”, 2] # (it'll vary depending on file name and line number)

def b; c; end def c; Gem.location_of_caller(2); end b #=> [“x.rb”, 6] # (it'll vary depending on file name and line number)



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# File 'lib/rubygems.rb', line 632

def self.location_of_caller(depth = 1)
  caller[depth] =~ /(.*?):(\d+).*?$/i
  file = $1
  lineno = $2.to_i

  [file, lineno]
end

.marshal_version ⇒ Object

The version of the Marshal format for your Ruby.



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# File 'lib/rubygems.rb', line 643

def self.marshal_version
  "#{Marshal::MAJOR_VERSION}.#{Marshal::MINOR_VERSION}"
end

.needs {|rs| ... } ⇒ Object

Yields:

  • (rs) 


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# File 'lib/rubygems.rb', line 218

def self.needs
  rs = Gem::RequestSet.new

  yield rs

  finish_resolve rs
end

.open_file(path, flags, &block) ⇒ Object

Open a file with given flags, and on Windows protect access with flock



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# File 'lib/rubygems.rb', line 782

def self.open_file(path, flags, &block)
  File.open(path, flags) do |io|
    if !java_platform? && win_platform?
      begin
        io.flock(File::LOCK_EX)
      rescue Errno::ENOSYS, Errno::ENOTSUP
      end
    end
    yield io
  end
rescue Errno::ENOLCK # NFS
  if Thread.main != Thread.current
    raise
  else
    File.open(path, flags) do |io|
      yield io
    end
  end
end

.operating_system_defaults ⇒ Object

Default options for gem commands for Ruby packagers.

The options here should be structured as an array of string “gem” command names as keys and a string of the default options as values.

Example:

def self.operating_system_defaults

{
    'install' => '--no-rdoc --no-ri --env-shebang',
    'update' => '--no-rdoc --no-ri --env-shebang'
}

end



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# File 'lib/rubygems/defaults.rb', line 255

def self.operating_system_defaults
  {}
end

.path ⇒ Object 



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# File 'lib/rubygems.rb', line 407

def self.path
  paths.path
end

.path_separator ⇒ Object

How String Gem paths should be split. Overridable for esoteric platforms.



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# File 'lib/rubygems/defaults.rb', line 153

def self.path_separator
  File::PATH_SEPARATOR
end

.paths ⇒ Object

Retrieve the PathSupport object that RubyGems uses to lookup files.



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

def self.paths
  @paths ||= Gem::PathSupport.new(ENV)
end

.paths=(env) ⇒ Object

Initialize the filesystem paths to use from env. env is a hash-like object (typically ENV) that is queried for 'GEM_HOME', 'GEM_PATH', and 'GEM_SPEC_CACHE' Keys for the env hash should be Strings, and values of the hash should be Strings or nil.



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

def self.paths=(env)
  clear_paths
  target = {}
  env.each_pair do |k,v|
    case k
    when "GEM_HOME", "GEM_PATH", "GEM_SPEC_CACHE"
      case v
      when nil, String
        target[k] = v
      when Array
        unless Gem::Deprecate.skip
          warn <<-EOWARN
Array values in the parameter to `Gem.paths=` are deprecated.
Please use a String or nil.
An Array (#{env.inspect}) was passed in from #{caller[3]}
          EOWARN
        end
        target[k] = v.join File::PATH_SEPARATOR
      end
    else
      target[k] = v
    end
  end
  @paths = Gem::PathSupport.new ENV.to_hash.merge(target)
  Gem::Specification.dirs = @paths.path
end

.platform_defaults ⇒ Object

Default options for gem commands for Ruby implementers.

The options here should be structured as an array of string “gem” command names as keys and a string of the default options as values.

Example:

def self.platform_defaults

{
    'install' => '--no-rdoc --no-ri --env-shebang',
    'update' => '--no-rdoc --no-ri --env-shebang'
}

end



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# File 'lib/rubygems/defaults.rb', line 274

def self.platform_defaults
  {}
end

.platforms ⇒ Object

Array of platforms this RubyGems supports.



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

def self.platforms
  @platforms ||= []
  if @platforms.empty?
    @platforms = [Gem::Platform::RUBY, Gem::Platform.local]
  end
  @platforms
end

.platforms=(platforms) ⇒ Object

Set array of platforms this RubyGems supports (primarily for testing).



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# File 'lib/rubygems.rb', line 650

def self.platforms=(platforms)
  @platforms = platforms
end

.plugin_suffix_pattern ⇒ Object

Glob pattern for require-able plugin suffixes.



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# File 'lib/rubygems.rb', line 928

def self.plugin_suffix_pattern
  @plugin_suffix_pattern ||= "_plugin#{suffix_pattern}"
end

.plugin_suffix_regexp ⇒ Object

Regexp for require-able plugin suffixes.



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# File 'lib/rubygems.rb', line 935

def self.plugin_suffix_regexp
  @plugin_suffix_regexp ||= /_plugin#{suffix_regexp}\z/
end

.plugindir(install_dir = Gem.dir) ⇒ Object

The path were rubygems plugins are to be installed.



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# File 'lib/rubygems.rb', line 311

def self.plugindir(install_dir=Gem.dir)
  File.join install_dir, "plugins"
end

.post_build(&hook) ⇒ Object

Adds a post-build hook that will be passed an Gem::Installer instance when Gem::Installer#install is called. The hook is called after the gem has been extracted and extensions have been built but before the executables or gemspec has been written. If the hook returns false then the gem's files will be removed and the install will be aborted.



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# File 'lib/rubygems.rb', line 672

def self.post_build(&hook)
  @post_build_hooks << hook
end

.post_install(&hook) ⇒ Object

Adds a post-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called



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# File 'lib/rubygems.rb', line 680

def self.post_install(&hook)
  @post_install_hooks << hook
end

.post_reset(&hook) ⇒ Object

Adds a hook that will get run after Gem::Specification.reset is run.



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# File 'lib/rubygems.rb', line 697

def self.post_reset(&hook)
  @post_reset_hooks << hook
end

.post_uninstall(&hook) ⇒ Object

Adds a post-uninstall hook that will be passed a Gem::Uninstaller instance and the spec that was uninstalled when Gem::Uninstaller#uninstall is called



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# File 'lib/rubygems.rb', line 706

def self.post_uninstall(&hook)
  @post_uninstall_hooks << hook
end

.pre_install(&hook) ⇒ Object

Adds a pre-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called. If the hook returns false then the install will be aborted.



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# File 'lib/rubygems.rb', line 715

def self.pre_install(&hook)
  @pre_install_hooks << hook
end

.pre_reset(&hook) ⇒ Object

Adds a hook that will get run before Gem::Specification.reset is run.



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# File 'lib/rubygems.rb', line 723

def self.pre_reset(&hook)
  @pre_reset_hooks << hook
end

.pre_uninstall(&hook) ⇒ Object

Adds a pre-uninstall hook that will be passed an Gem::Uninstaller instance and the spec that will be uninstalled when Gem::Uninstaller#uninstall is called



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# File 'lib/rubygems.rb', line 732

def self.pre_uninstall(&hook)
  @pre_uninstall_hooks << hook
end

.prefix ⇒ Object

The directory prefix this RubyGems was installed at. If your prefix is in a standard location (ie, rubygems is installed where you'd expect it to be), then prefix returns nil.



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# File 'lib/rubygems.rb', line 741

def self.prefix
  prefix = File.dirname RUBYGEMS_DIR

  if prefix != File.expand_path(RbConfig::CONFIG["sitelibdir"]) &&
     prefix != File.expand_path(RbConfig::CONFIG["libdir"]) &&
     "lib" == File.basename(RUBYGEMS_DIR)
    prefix
  end
end

.read_binary(path) ⇒ Object

Safely read a file in binary mode on all platforms.



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# File 'lib/rubygems.rb', line 761

def self.read_binary(path)
  open_file(path, "rb+") do |io|
    io.read
  end
rescue Errno::EACCES, Errno::EROFS
  open_file(path, "rb") do |io|
    io.read
  end
end

.refresh ⇒ Object

Refresh available gems from disk.



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# File 'lib/rubygems.rb', line 754

def self.refresh
  Gem::Specification.reset
end

.register_default_spec(spec) ⇒ Object

Register a Gem::Specification for default gem.

Two formats for the specification are supported:

  • MRI 2.0 style, where spec.files contains unprefixed require names. The spec's filenames will be registered as-is.

  • New style, where spec.files contains files prefixed with paths from spec.require_paths. The prefixes are stripped before registering the spec's filenames. Unprefixed files are omitted.



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# File 'lib/rubygems.rb', line 1191

def register_default_spec(spec)
  extended_require_paths = spec.require_paths.map {|f| f + "/" }
  new_format = extended_require_paths.any? {|path| spec.files.any? {|f| f.start_with? path } }

  if new_format
    prefix_group = extended_require_paths.join("|")
    prefix_pattern = /^(#{prefix_group})/
  end

  spec.files.each do |file|
    if new_format
      file = file.sub(prefix_pattern, "")
      next unless $~
    end

    spec.activate if already_loaded?(file)

    @path_to_default_spec_map[file] = spec
    @path_to_default_spec_map[file.sub(suffix_regexp, "")] = spec
  end
end

.ruby ⇒ Object

The path to the running Ruby interpreter.



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# File 'lib/rubygems.rb', line 805

def self.ruby
  if @ruby.nil?
    @ruby = RbConfig.ruby

    @ruby = "\"#{@ruby}\"" if @ruby =~ /\s/
  end

  @ruby
end

.ruby_api_version ⇒ Object

Returns a String containing the API compatibility version of Ruby



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# File 'lib/rubygems.rb', line 818

def self.ruby_api_version
  @ruby_api_version ||= RbConfig::CONFIG["ruby_version"].dup
end

.ruby_engine ⇒ Object 



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# File 'lib/rubygems/defaults.rb', line 189

def self.ruby_engine
  RUBY_ENGINE
end

.ruby_version ⇒ Object

A Gem::Version for the currently running Ruby.



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# File 'lib/rubygems.rb', line 863

def self.ruby_version
  return @ruby_version if defined? @ruby_version
  version = RUBY_VERSION.dup

  unless defined?(RUBY_PATCHLEVEL) && RUBY_PATCHLEVEL != -1
    if RUBY_ENGINE == "ruby"
      desc = RUBY_DESCRIPTION[/\Aruby #{Regexp.quote(RUBY_VERSION)}([^ ]+) /, 1]
    else
      desc = RUBY_DESCRIPTION[/\A#{RUBY_ENGINE} #{Regexp.quote(RUBY_ENGINE_VERSION)} \(#{RUBY_VERSION}([^ ]+)\) /, 1]
    end
    version << ".#{desc}" if desc
  end

  @ruby_version = Gem::Version.new version
end

.rubygems_version ⇒ Object

A Gem::Version for the currently running RubyGems



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# File 'lib/rubygems.rb', line 882

def self.rubygems_version
  return @rubygems_version if defined? @rubygems_version
  @rubygems_version = Gem::Version.new Gem::VERSION
end

.solaris_platform? ⇒ Boolean

Is this platform Solaris?

Returns:

  • (Boolean) 


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# File 'lib/rubygems.rb', line 1012

def self.solaris_platform?
  RUBY_PLATFORM =~ /solaris/
end

.source_date_epoch ⇒ Object

Returns the value of Gem.source_date_epoch_string, as a Time object.

This is used throughout RubyGems for enabling reproducible builds.



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# File 'lib/rubygems.rb', line 1154

def self.source_date_epoch
  Time.at(self.source_date_epoch_string.to_i).utc.freeze
end

.source_date_epoch_string ⇒ Object

If the SOURCE_DATE_EPOCH environment variable is set, returns it's value. Otherwise, returns the time that Gem.source_date_epoch_string was first called in the same format as SOURCE_DATE_EPOCH.

NOTE(@duckinator): The implementation is a tad weird because we want to:

1. Make builds reproducible by default, by having this function always
   return the same result during a given run.
2. Allow changing ENV['SOURCE_DATE_EPOCH'] at runtime, since multiple
   tests that set this variable will be run in a single process.

If you simplify this function and a lot of tests fail, that is likely due to #2 above.

Details on SOURCE_DATE_EPOCH: reproducible-builds.org/specs/source-date-epoch/



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# File 'lib/rubygems.rb', line 1135

def self.source_date_epoch_string
  # The value used if $SOURCE_DATE_EPOCH is not set.
  @default_source_date_epoch ||= Time.now.to_i.to_s

  specified_epoch = ENV["SOURCE_DATE_EPOCH"]

  # If it's empty or just whitespace, treat it like it wasn't set at all.
  specified_epoch = nil if !specified_epoch.nil? && specified_epoch.strip.empty?

  epoch = specified_epoch || @default_source_date_epoch

  epoch.strip
end

.sources ⇒ Object

Returns an Array of sources to fetch remote gems from. Uses default_sources if the sources list is empty.



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# File 'lib/rubygems.rb', line 891

def self.sources
  source_list = configuration.sources || default_sources
  @sources ||= Gem::SourceList.from(source_list)
end

.sources=(new_sources) ⇒ Object

Need to be able to set the sources without calling Gem.sources.replace since that would cause an infinite loop.

DOC: This comment is not documentation about the method itself, it's more of a code comment about the implementation.



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# File 'lib/rubygems.rb', line 903

def self.sources=(new_sources)
  if !new_sources
    @sources = nil
  else
    @sources = Gem::SourceList.from(new_sources)
  end
end

.spec_cache_dir ⇒ Object 



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# File 'lib/rubygems.rb', line 411

def self.spec_cache_dir
  paths.spec_cache_dir
end

.suffix_pattern ⇒ Object

Glob pattern for require-able path suffixes.



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# File 'lib/rubygems.rb', line 914

def self.suffix_pattern
  @suffix_pattern ||= "{#{suffixes.join(',')}}"
end

.suffix_regexp ⇒ Object

Regexp for require-able path suffixes.



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# File 'lib/rubygems.rb', line 921

def self.suffix_regexp
  @suffix_regexp ||= /#{Regexp.union(suffixes)}\z/
end

.suffixes ⇒ Object

Suffixes for require-able paths.



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# File 'lib/rubygems.rb', line 942

def self.suffixes
  @suffixes ||= ["",
                 ".rb",
                 *%w[DLEXT DLEXT2].map do |key|
                   val = RbConfig::CONFIG[key]
                   next unless val && !val.empty?
                   ".#{val}"
                 end,
                ].compact.uniq
end

.time(msg, width = 0, display = Gem.configuration.verbose) ⇒ Object

Prints the amount of time the supplied block takes to run using the debug UI output.



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# File 'lib/rubygems.rb', line 957

def self.time(msg, width = 0, display = Gem.configuration.verbose)
  now = Time.now

  value = yield

  elapsed = Time.now - now

  ui.say "%2$*1$s: %3$3.3fs" % [-width, msg, elapsed] if display

  value
end

.try_activate(path) ⇒ Object

Try to activate a gem containing path. Returns true if activation succeeded or wasn't needed because it was already activated. Returns false if it can't find the path in a gem.



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# File 'lib/rubygems.rb', line 193

def self.try_activate(path)
  # finds the _latest_ version... regardless of loaded specs and their deps
  # if another gem had a requirement that would mean we shouldn't
  # activate the latest version, then either it would already be activated
  # or if it was ambiguous (and thus unresolved) the code in our custom
  # require will try to activate the more specific version.

  spec = Gem::Specification.find_by_path path
  return false unless spec
  return true if spec.activated?

  begin
    spec.activate
  rescue Gem::LoadError => e # this could fail due to gem dep collisions, go lax
    spec_by_name = Gem::Specification.find_by_name(spec.name)
    if spec_by_name.nil?
      raise e
    else
      spec_by_name.activate
    end
  end

  return true
end

.ui ⇒ Object

Lazily loads DefaultUserInteraction and returns the default UI.



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# File 'lib/rubygems.rb', line 972

def self.ui
  require_relative "rubygems/user_interaction"

  Gem::DefaultUserInteraction.ui
end

.use_gemdeps(path = nil) ⇒ Object

Looks for a gem dependency file at path and activates the gems in the file if found. If the file is not found an ArgumentError is raised.

If path is not given the RUBYGEMS_GEMDEPS environment variable is used, but if no file is found no exception is raised.

If '-' is given for path RubyGems searches up from the current working directory for gem dependency files (gem.deps.rb, Gemfile, Isolate) and activates the gems in the first one found.

You can run this automatically when rubygems starts. To enable, set the RUBYGEMS_GEMDEPS environment variable to either the path of your gem dependencies file or “-” to auto-discover in parent directories.

NOTE: Enabling automatic discovery on multiuser systems can lead to execution of arbitrary code when used from directories outside your control.



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# File 'lib/rubygems.rb', line 1071

def self.use_gemdeps(path = nil)
  raise_exception = path

  path ||= ENV["RUBYGEMS_GEMDEPS"]
  return unless path

  path = path.dup

  if path == "-"
    Gem::Util.traverse_parents Dir.pwd do |directory|
      dep_file = GEM_DEP_FILES.find {|f| File.file?(f) }

      next unless dep_file

      path = File.join directory, dep_file
      break
    end
  end

  path.tap(&Gem::UNTAINT)

  unless File.file? path
    return unless raise_exception

    raise ArgumentError, "Unable to find gem dependencies file at #{path}"
  end

  ENV["BUNDLE_GEMFILE"] ||= File.expand_path(path)
  require_relative "rubygems/user_interaction"
  require "bundler"
  begin
    Gem::DefaultUserInteraction.use_ui(ui) do
      begin
        Bundler.ui.silence do
          @gemdeps = Bundler.setup
        end
      ensure
        Gem::DefaultUserInteraction.ui.close
      end
    end
  rescue Bundler::BundlerError => e
    warn e.message
    warn "You may need to `bundle install` to install missing gems"
    warn ""
  end
end

.use_paths(home, *paths) ⇒ Object

Use the home and paths values for Gem.dir and Gem.path. Used mainly by the unit tests to provide environment isolation.



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# File 'lib/rubygems.rb', line 982

def self.use_paths(home, *paths)
  paths.flatten!
  paths.compact!
  hash = { "GEM_HOME" => home, "GEM_PATH" => paths.empty? ? home : paths.join(File::PATH_SEPARATOR) }
  hash.delete_if {|_, v| v.nil? }
  self.paths = hash
end

.user_dir ⇒ Object

Path for gems in the user's home directory



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# File 'lib/rubygems/defaults.rb', line 102

def self.user_dir
  gem_dir = File.join(Gem.user_home, ".gem")
  gem_dir = File.join(Gem.data_home, "gem") unless File.exist?(gem_dir)
  parts = [gem_dir, ruby_engine]
  parts << RbConfig::CONFIG["ruby_version"] unless RbConfig::CONFIG["ruby_version"].empty?
  File.join parts
end

.user_home ⇒ Object

The home directory for the user.



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# File 'lib/rubygems/defaults.rb', line 95

def self.user_home
  @user_home ||= find_home.tap(&Gem::UNTAINT)
end

.vendor_dir ⇒ Object

Directory where vendor gems are installed.



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# File 'lib/rubygems/defaults.rb', line 229

def self.vendor_dir # :nodoc:
  if vendor_dir = ENV["GEM_VENDOR"]
    return vendor_dir.dup
  end

  return nil unless RbConfig::CONFIG.key? "vendordir"

  File.join RbConfig::CONFIG["vendordir"], "gems",
            RbConfig::CONFIG["ruby_version"]
end

.win_platform? ⇒ Boolean

Is this a windows platform?

Returns:

  • (Boolean) 


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# File 'lib/rubygems.rb', line 993

def self.win_platform?
  if @@win_platform.nil?
    ruby_platform = RbConfig::CONFIG["host_os"]
    @@win_platform = !!WIN_PATTERNS.find {|r| ruby_platform =~ r }
  end

  @@win_platform
end

.write_binary(path, data) ⇒ Object

Safely write a file in binary mode on all platforms.



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# File 'lib/rubygems.rb', line 773

def self.write_binary(path, data)
  open_file(path, "wb") do |io|
    io.write data
  end
end