class Gem::Specification

The Specification class contains the information for a gem. Typically defined in a .gemspec file or a Rakefile, and looks like this:

Gem::Specification.new do |s|
  s.name        = 'example'
  s.version     = '0.1.0'
  s.licenses    = ['MIT']
  s.summary     = "This is an example!"
  s.description = "Much longer explanation of the example!"
  s.authors     = ["Ruby Coder"]
  s.email       = 'rubycoder@example.com'
  s.files       = ["lib/example.rb"]
  s.homepage    = 'https://rubygems.org/gems/example'
  s.metadata    = { "source_code_uri" => "https://github.com/example/example" }
end

Starting in RubyGems 2.0, a Specification can hold arbitrary metadata. See metadata for restrictions on the format and size of metadata items you may add to a specification.

Constants

NONEXISTENT_SPECIFICATION_VERSION: The version number of a specification that does not specify one (i.e. RubyGems 0.7 or earlier).

Public Instance Methods

removed_method_calls ()

# File lib/rubygems/specification.rb, line 189
def removed_method_calls
  @removed_method_calls ||= []
end

Optional gemspec attributes

Constants

LATEST_RUBY_WITHOUT_PATCH_VERSIONS

Attributes

bindir [RW]

The path in the gem for executable scripts. Usually ‘exe’

Usage:

spec.bindir = 'exe'

cert_chain [RW]

The certificate chain used to sign this gem. See Gem::Security for details.

post_install_message [RW]

A message that gets displayed after the gem is installed.

Usage:

spec.post_install_message = "Thanks for installing!"

required_rubygems_version [R]

The RubyGems version required by this gem

signing_key [RW]

The key used to sign this gem. See Gem::Security for details.

Public Instance Methods

add_dependency (gem, *requirements)

Adds a runtime dependency named gem with requirements to this gem.

Usage:

spec.add_dependency 'example', '~> 1.1', '>= 1.1.4'

# File lib/rubygems/specification.rb, line 551
def add_dependency(gem, *requirements)
  if requirements.uniq.size != requirements.size
    warn "WARNING: duplicated #{gem} dependency #{requirements}"
  end

  add_dependency_with_type(gem, :runtime, requirements)
end

Also aliased as: add_runtime_dependency

add_development_dependency (gem, *requirements)

Adds a development dependency named gem with requirements to this gem.

Usage:

spec.add_development_dependency 'example', '~> 1.1', '>= 1.1.4'

Development dependencies aren’t installed by default and aren’t activated when a gem is required.

# File lib/rubygems/specification.rb, line 540
def add_development_dependency(gem, *requirements)
  add_dependency_with_type(gem, :development, requirements)
end

author= (o)

Singular (alternative) writer for authors

Usage:

spec.author = 'John Jones'

# File lib/rubygems/specification.rb, line 415
def author=(o)
  self.authors = [o]
end

executables ()

Executables included in the gem.

For example, the rake gem has rake as an executable. You don’t specify the full path (as in bin/rake); all application-style files are expected to be found in bindir. These files must be executable Ruby files. Files that use bash or other interpreters will not work.

Executables included may only be ruby scripts, not scripts for other languages or compiled binaries.

Usage:

spec.executables << 'rake'

# File lib/rubygems/specification.rb, line 574
def executables
  @executables ||= []
end

extensions ()

Extensions to build when installing the gem, specifically the paths to extconf.rb-style files used to compile extensions.

These files will be run when the gem is installed, causing the C (or whatever) code to be compiled on the user’s machine.

Usage:

spec.extensions << 'ext/rmagic/extconf.rb'

See Gem::Ext::Builder for information about writing extensions for gems.

# File lib/rubygems/specification.rb, line 591
def extensions
  @extensions ||= []
end

extra_rdoc_files ()

Extra files to add to RDoc such as README or doc/examples.txt

When the user elects to generate the RDoc documentation for a gem (typically at install time), all the library files are sent to RDoc for processing. This option allows you to have some non-code files included for a more complete set of documentation.

Usage:

spec.extra_rdoc_files = ['README', 'doc/user-guide.txt']

# File lib/rubygems/specification.rb, line 607
def extra_rdoc_files
  @extra_rdoc_files ||= []
end

platform= (platform)

The platform this gem runs on.

This is usually Gem::Platform::RUBY or Gem::Platform::CURRENT.

Most gems contain pure Ruby code; they should simply leave the default value in place. Some gems contain C (or other) code to be compiled into a Ruby “extension”. The gem should leave the default value in place unless the code will only compile on a certain type of system. Some gems consist of pre-compiled code (“binary gems”). It’s especially important that they set the platform attribute appropriately. A shortcut is to set the platform to Gem::Platform::CURRENT, which will cause the gem builder to set the platform to the appropriate value for the system on which the build is being performed.

If this attribute is set to a non-default value, it will be included in the filename of the gem when it is built such as: nokogiri-1.6.0-x86-mingw32.gem

Usage:

spec.platform = Gem::Platform.local

# File lib/rubygems/specification.rb, line 466
def platform=(platform)
  if @original_platform.nil? ||
     @original_platform == Gem::Platform::RUBY
    @original_platform = platform
  end

  case platform
  when Gem::Platform::CURRENT then
    @new_platform = Gem::Platform.local
    @original_platform = @new_platform.to_s

  when Gem::Platform then
    @new_platform = platform

  # legacy constants
  when nil, Gem::Platform::RUBY then
    @new_platform = Gem::Platform::RUBY
  when "mswin32" then # was Gem::Platform::WIN32
    @new_platform = Gem::Platform.new "x86-mswin32"
  when "i586-linux" then # was Gem::Platform::LINUX_586
    @new_platform = Gem::Platform.new "x86-linux"
  when "powerpc-darwin" then # was Gem::Platform::DARWIN
    @new_platform = Gem::Platform.new "ppc-darwin"
  else
    @new_platform = Gem::Platform.new platform
  end

  @platform = @new_platform.to_s

  invalidate_memoized_attributes
end

rdoc_options ()

Specifies the rdoc options to be used when generating API documentation.

Usage:

spec.rdoc_options << '--title' << 'Rake -- Ruby Make' <<
  '--main' << 'README' <<
  '--line-numbers'

# File lib/rubygems/specification.rb, line 637
def rdoc_options
  @rdoc_options ||= []
end

require_paths= (val)

Paths in the gem to add to $LOAD_PATH when this gem is activated. If you have an extension you do not need to add "ext" to the require path, the extension build process will copy the extension files into “lib” for you.

The default value is "lib"

Usage:

# If all library files are in the root directory...
spec.require_paths = ['.']

# File lib/rubygems/specification.rb, line 515
def require_paths=(val)
  @require_paths = Array(val)
end

required_ruby_version= (req)

The version of Ruby required by this gem. The ruby version can be specified to the patch-level:

$ ruby -v -e 'p Gem.ruby_version'
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.4.0]
#<Gem::Version "2.0.0.247">

Prereleases can also be specified.

Usage:

# This gem will work with 1.8.6 or greater...
spec.required_ruby_version = '>= 1.8.6'

# Only with final releases of major version 2 where minor version is at least 3
spec.required_ruby_version = '~> 2.3'

# Only prereleases or final releases after 2.6.0.preview2
spec.required_ruby_version = '> 2.6.0.preview2'

# This gem will work with 2.3.0 or greater, including major version 3, but lesser than 4.0.0
spec.required_ruby_version = '>= 2.3', '< 4'

# File lib/rubygems/specification.rb, line 667
def required_ruby_version=(req)
  @required_ruby_version = Gem::Requirement.create req

  @required_ruby_version.requirements.map! do |op, v|
    if v >= LATEST_RUBY_WITHOUT_PATCH_VERSIONS && v.release.segments.size == 4
      [op == "~>" ? "=" : op, Gem::Version.new(v.segments.tap {|s| s.delete_at(3) }.join("."))]
    else
      [op, v]
    end
  end
end

required_rubygems_version= (req)

The RubyGems version required by this gem

# File lib/rubygems/specification.rb, line 682
def required_rubygems_version=(req)
  @required_rubygems_version = Gem::Requirement.create req
end

requirements ()

Lists the external (to RubyGems) requirements that must be met for this gem to work. It’s simply information for the user.

Usage:

spec.requirements << 'libmagick, v6.0'
spec.requirements << 'A good graphics card'

# File lib/rubygems/specification.rb, line 695
def requirements
  @requirements ||= []
end

Read-only attributes

Attributes

rubygems_version [RW]

The version of RubyGems used to create this gem.

Public Instance Methods

extensions_dir ()

The path where this gem installs its extensions.

Calls superclass method Gem::BasicSpecification#extensions_dir

# File lib/rubygems/specification.rb, line 722
def extensions_dir
  @extensions_dir ||= super
end

Recommended gemspec attributes

Attributes

description [R]

A long description of this gem

The description should be more detailed than the summary but not excessively long. A few paragraphs is a recommended length with no examples or formatting.

Usage:

spec.description = <<~EOF
  Rake is a Make-like program implemented in Ruby. Tasks and
  dependencies are specified in standard Ruby syntax.
EOF

email [RW]

A contact email address (or addresses) for this gem

Usage:

spec.email = 'john.jones@example.com'
spec.email = ['jack@example.com', 'jill@example.com']

homepage [RW]

The URL of this gem’s home page

Usage:

spec.homepage = 'https://github.com/ruby/rake'

metadata [RW]

The metadata holds extra data for this gem that may be useful to other consumers and is settable by gem authors.

Metadata items have the following restrictions:

The metadata must be a Hash object
All keys and values must be Strings
Keys can be a maximum of 128 bytes and values can be a maximum of 1024 bytes
All strings must be UTF-8, no binary data is allowed

You can use metadata to specify links to your gem’s homepage, codebase, documentation, wiki, mailing list, issue tracker and changelog.

s.metadata = {
  "bug_tracker_uri"   => "https://example.com/user/bestgemever/issues",
  "changelog_uri"     => "https://example.com/user/bestgemever/CHANGELOG.md",
  "documentation_uri" => "https://www.example.info/gems/bestgemever/0.0.1",
  "homepage_uri"      => "https://bestgemever.example.io",
  "mailing_list_uri"  => "https://groups.example.com/bestgemever",
  "source_code_uri"   => "https://example.com/user/bestgemever",
  "wiki_uri"          => "https://example.com/user/bestgemever/wiki"
  "funding_uri"       => "https://example.com/donate"
}

These links will be used on your gem’s page on rubygems.org and must pass validation against following regex.

%r{\Ahttps?:\/\/([^\s:@]+:[^\s:@]*@)?[A-Za-z\d\-]+(\.[A-Za-z\d\-]+)+\.?(:\d{1,5})?([\/?]\S*)?\z}

required_ruby_version [R]

The version of Ruby required by this gem

Usage:

spec.required_ruby_version = '>= 2.7.0'

Public Instance Methods

license= (o)

The license for this gem.

The license must be no more than 64 characters.

This should just be the name of your license. The full text of the license should be inside of the gem (at the top level) when you build it.

The simplest way is to specify the standard SPDX ID spdx.org/licenses/ for the license. Ideally, you should pick one that is OSI (Open Source Initiative) opensource.org/licenses/ approved.

The most commonly used OSI-approved licenses are MIT and Apache-2.0. GitHub also provides a license picker at choosealicense.com/.

You can also use a custom license file along with your gemspec and specify a LicenseRef-<idstring>, where idstring is the name of the file containing the license text.

You should specify a license for your gem so that people know how they are permitted to use it and any restrictions you’re placing on it. Not specifying a license means all rights are reserved; others have no right to use the code for any purpose.

You can set multiple licenses with licenses=

Usage:

spec.license = 'MIT'

# File lib/rubygems/specification.rb, line 351
def license=(o)
  self.licenses = [o]
end

licenses= (licenses)

The license(s) for the library.

Each license must be a short name, no more than 64 characters.

This should just be the name of your license. The full text of the license should be inside of the gem when you build it.

See license= for more discussion

Usage:

spec.licenses = ['MIT', 'GPL-2.0']

# File lib/rubygems/specification.rb, line 368
def licenses=(licenses)
  @licenses = Array licenses
end

Required gemspec attributes

Attributes

name [RW]

This gem’s name.

Usage:

spec.name = 'rake'

summary [R]

A short summary of this gem’s description. Displayed in gem list -d.

The description should be more detailed than the summary.

Usage:

spec.summary = "This is a small summary of my gem"

version [R]

This gem’s version.

The version string can contain numbers and periods, such as 1.0.0. A gem is a ‘prerelease’ gem if the version has a letter in it, such as 1.0.0.pre.

Usage:

spec.version = '0.4.1'

Public Instance Methods

authors= (value)

A list of authors for this gem.

Alternatively, a single author can be specified by assigning a string to spec.author

Usage:

spec.authors = ['John Jones', 'Mary Smith']

# File lib/rubygems/specification.rb, line 270
def authors=(value)
  @authors = Array(value).flatten.grep(String)
end

files ()

Files included in this gem. You cannot append to this accessor, you must assign to it.

Only add files you can require to this list, not directories, etc.

Directories are automatically stripped from this list when building a gem, other non-files cause an error.

Usage:

require 'rake'
spec.files = FileList['lib/**/*.rb',
                      'bin/*',
                      '[A-Z]*'].to_a

# or without Rake...
spec.files = Dir['lib/**/*.rb'] + Dir['bin/*']
spec.files += Dir['[A-Z]*']
spec.files.reject! { |fn| fn.include? "CVS" }

# File lib/rubygems/specification.rb, line 250
def files
  # DO NOT CHANGE TO ||= ! This is not a normal accessor. (yes, it sucks)
  # DOC: Why isn't it normal? Why does it suck? How can we fix this?
  @files = [@files,
            @test_files,
            add_bindir(@executables),
            @extra_rdoc_files,
            @extensions].flatten.compact.uniq.sort
end

Specification internals

Attributes

activated [RW]

True when this gemspec has been activated. This attribute is not persisted.

activated? [RW]

True when this gemspec has been activated. This attribute is not persisted.

default_executable [W]

Sets the default executable for this gem.

Deprecated: You must now specify the executable name to Gem.bin_path.

specification_version [RW]

The Gem::Specification version of this gemspec.

Do not set this, it is set automatically when the gem is packaged.

Public Class Methods

_load (str)

Load custom marshal format, re-initializing defaults as needed

# File lib/rubygems/specification.rb, line 1239
def self._load(str)
  Gem.load_yaml
  Gem.load_safe_marshal

  yaml_set = false
  retry_count = 0

  array = begin
    Gem::SafeMarshal.safe_load str
  rescue ArgumentError => e
    # Avoid an infinite retry loop when the argument error has nothing to do
    # with the classes not being defined.
    # 1 retry each allowed in case all 3 of
    # - YAML
    # - YAML::Syck::DefaultKey
    # - YAML::PrivateType
    # need to be defined
    raise if retry_count >= 3

    #
    # Some very old marshaled specs included references to `YAML::PrivateType`
    # and `YAML::Syck::DefaultKey` constants due to bugs in the old emitter
    # that generated them. Workaround the issue by defining the necessary
    # constants and retrying.
    #
    message = e.message
    raise unless message.include?("YAML::")

    unless Object.const_defined?(:YAML)
      Object.const_set "YAML", Psych
      yaml_set = true
    end

    if message.include?("YAML::Syck::")
      YAML.const_set "Syck", YAML unless YAML.const_defined?(:Syck)

      YAML::Syck.const_set "DefaultKey", Class.new if message.include?("YAML::Syck::DefaultKey") && !YAML::Syck.const_defined?(:DefaultKey)
    elsif message.include?("YAML::PrivateType") && !YAML.const_defined?(:PrivateType)
      YAML.const_set "PrivateType", Class.new
    end

    retry_count += 1
    retry
  ensure
    Object.__send__(:remove_const, "YAML") if yaml_set
  end

  spec = Gem::Specification.new
  spec.instance_variable_set :@specification_version, array[1]

  current_version = CURRENT_SPECIFICATION_VERSION

  field_count = if spec.specification_version > current_version
    spec.instance_variable_set :@specification_version,
                               current_version
    MARSHAL_FIELDS[current_version]
  else
    MARSHAL_FIELDS[spec.specification_version]
  end

  if array.size < field_count
    raise TypeError, "invalid Gem::Specification format #{array.inspect}"
  end

  spec.instance_variable_set :@rubygems_version,          array[0]
  # spec version
  spec.instance_variable_set :@name,                      array[2]
  spec.instance_variable_set :@version,                   array[3]
  spec.date =                                             array[4]
  spec.instance_variable_set :@summary,                   array[5]
  spec.instance_variable_set :@required_ruby_version,     array[6]
  spec.instance_variable_set :@required_rubygems_version, array[7]
  spec.instance_variable_set :@original_platform,         array[8]
  spec.instance_variable_set :@dependencies,              array[9]
  # offset due to rubyforge_project removal
  spec.instance_variable_set :@email,                     array[11]
  spec.instance_variable_set :@authors,                   array[12]
  spec.instance_variable_set :@description,               array[13]
  spec.instance_variable_set :@homepage,                  array[14]
  spec.instance_variable_set :@has_rdoc,                  array[15]
  spec.instance_variable_set :@new_platform,              array[16]
  spec.instance_variable_set :@platform,                  array[16].to_s
  spec.instance_variable_set :@licenses,                  [array[17]]
  spec.instance_variable_set :@metadata,                  array[18]
  spec.instance_variable_set :@loaded,                    false
  spec.instance_variable_set :@activated,                 false

  spec
end

add_spec (spec)

Adds spec to the known specifications, keeping the collection properly sorted.

# File lib/rubygems/specification.rb, line 861
def self.add_spec(spec)
  specification_record.add_spec(spec)
end

all ()

Returns all specifications. This method is discouraged from use. You probably want to use one of the Enumerable methods instead.

# File lib/rubygems/specification.rb, line 876
def self.all
  warn "NOTE: Specification.all called from #{caller(1, 1).first}" unless
    Gem::Deprecate.skip
  _all
end

all= (specs)

Sets the known specs to specs.

# File lib/rubygems/specification.rb, line 885
def self.all=(specs)
  specification_record.all = specs
end

all_names ()

Return full names of all specs in sorted order.

# File lib/rubygems/specification.rb, line 892
def self.all_names
  specification_record.all_names
end

array_attributes ()

Return the list of all array-oriented instance variables.

# File lib/rubygems/specification.rb, line 901
def self.array_attributes
  @@array_attributes.dup
end

attribute_names ()

Return the list of all instance variables.

# File lib/rubygems/specification.rb, line 910
def self.attribute_names
  @@attributes.dup
end

default_stubs (pattern = "*.gemspec")

Returns a Gem::StubSpecification for default gems

# File lib/rubygems/specification.rb, line 808
def self.default_stubs(pattern = "*.gemspec")
  base_dir = Gem.default_dir
  gems_dir = File.join base_dir, "gems"
  gemspec_stubs_in(Gem.default_specifications_dir, pattern) do |path|
    Gem::StubSpecification.default_gemspec_stub(path, base_dir, gems_dir)
  end
end

dirs ()

Return the directories that Specification uses to find specs.

# File lib/rubygems/specification.rb, line 917
def self.dirs
  @@dirs ||= Gem::SpecificationRecord.dirs_from(gem_path)
end

dirs= (dirs)

Set the directories that Specification uses to find specs. Setting this resets the list of known specs.

# File lib/rubygems/specification.rb, line 925
def self.dirs=(dirs)
  reset

  @@dirs = Gem::SpecificationRecord.dirs_from(Array(dirs))
end

each (&block)

Enumerate every known spec. See ::dirs= and ::add_spec to set the list of specs.

# File lib/rubygems/specification.rb, line 937
def self.each(&block)
  specification_record.each(&block)
end

find_active_stub_by_path (path)

Return the best specification that contains the file matching path, among those already activated.

# File lib/rubygems/specification.rb, line 990
def self.find_active_stub_by_path(path)
  specification_record.find_active_stub_by_path(path)
end

find_all_by_full_name (full_name)

Returns every spec that has the given full_name

# File lib/rubygems/specification.rb, line 951
def self.find_all_by_full_name(full_name)
  stubs.select {|s| s.full_name == full_name }.map(&:to_spec)
end

find_all_by_name (name, *requirements)

Returns every spec that matches name and optional requirements.

# File lib/rubygems/specification.rb, line 944
def self.find_all_by_name(name, *requirements)
  specification_record.find_all_by_name(name, *requirements)
end

find_by_full_name (full_name)

Find the best specification matching a full_name.

# File lib/rubygems/specification.rb, line 967
def self.find_by_full_name(full_name)
  stubs.find {|s| s.full_name == full_name }&.to_spec
end

find_by_name (name, *requirements)

Find the best specification matching a name and requirements. Raises if the dependency doesn’t resolve to a valid specification.

# File lib/rubygems/specification.rb, line 959
def self.find_by_name(name, *requirements)
  requirements = Gem::Requirement.default if requirements.empty?

  Gem::Dependency.new(name, *requirements).to_spec
end

find_by_path (path)

Return the best specification that contains the file matching path.

# File lib/rubygems/specification.rb, line 974
def self.find_by_path(path)
  specification_record.find_by_path(path)
end

find_in_unresolved (path)

Return currently unresolved specs that contain the file matching path.

# File lib/rubygems/specification.rb, line 997
def self.find_in_unresolved(path)
  unresolved_specs.find_all {|spec| spec.contains_requirable_file? path }
end

find_in_unresolved_tree (path)

Search through all unresolved deps and sub-dependencies and return specs that contain the file matching path.

# File lib/rubygems/specification.rb, line 1005
def self.find_in_unresolved_tree(path)
  unresolved_specs.each do |spec|
    spec.traverse do |_from_spec, _dep, to_spec, trail|
      if to_spec.has_conflicts? || to_spec.conficts_when_loaded_with?(trail)
        :next
      else
        return trail.reverse if to_spec.contains_requirable_file? path
      end
    end
  end

  []
end

find_inactive_by_path (path)

Return the best specification that contains the file matching path amongst the specs that are not activated.

# File lib/rubygems/specification.rb, line 982
def self.find_inactive_by_path(path)
  specification_record.find_inactive_by_path(path)
end

from_yaml (input)

Special loader for YAML files. When a Specification object is loaded from a YAML file, it bypasses the normal Ruby object initialization routine (initialize). This method makes up for that and deals with gems of different ages.

input can be anything that YAML.load() accepts: String or IO.

# File lib/rubygems/specification.rb, line 1032
def self.from_yaml(input)
  Gem.load_yaml

  input = normalize_yaml_input input
  spec = Gem::SafeYAML.safe_load input

  if spec && spec.class == FalseClass
    raise Gem::EndOfYAMLException
  end

  unless Gem::Specification === spec
    raise Gem::Exception, "YAML data doesn't evaluate to gem specification"
  end

  spec.specification_version ||= NONEXISTENT_SPECIFICATION_VERSION
  spec.reset_nil_attributes_to_default
  spec.flatten_require_paths

  spec
end

latest_spec_for (name)

Return the latest installed spec for gem name.

# File lib/rubygems/specification.rb, line 1064
def self.latest_spec_for(name)
  specification_record.latest_spec_for(name)
end

latest_specs (prerelease = false)

Return the latest specs, optionally including prerelease specs if prerelease is true.

# File lib/rubygems/specification.rb, line 1057
def self.latest_specs(prerelease = false)
  specification_record.latest_specs(prerelease)
end

load (file)

Loads Ruby format gemspec from file.

# File lib/rubygems/specification.rb, line 1085
def self.load(file)
  return unless file

  spec = @load_cache_mutex.synchronize { @load_cache[file] }
  return spec if spec

  return unless File.file?(file)

  code = Gem.open_file(file, "r:UTF-8:-", &:read)

  begin
    spec = eval code, binding, file

    if Gem::Specification === spec
      spec.loaded_from = File.expand_path file.to_s
      @load_cache_mutex.synchronize do
        prev = @load_cache[file]
        if prev
          spec = prev
        else
          @load_cache[file] = spec
        end
      end
      return spec
    end

    warn "[#{file}] isn't a Gem::Specification (#{spec.class} instead)."
  rescue SignalException, SystemExit
    raise
  rescue SyntaxError, StandardError => e
    warn "Invalid gemspec in [#{file}]: #{e}"
  end

  nil
end

load_defaults ()

Loads the default specifications. It should be called only once.

# File lib/rubygems/specification.rb, line 849
def self.load_defaults
  each_spec([Gem.default_specifications_dir]) do |spec|
    # #load returns nil if the spec is bad, so we just ignore
    # it at this stage
    Gem.register_default_spec(spec)
  end
end

new (name = nil, version = nil) { |self| ... }

Specification constructor. Assigns the default values to the attributes and yields itself for further initialization. Optionally takes name and version.

Calls superclass method Gem::BasicSpecification::new

# File lib/rubygems/specification.rb, line 1989
def initialize(name = nil, version = nil)
  super()
  @gems_dir              = nil
  @base_dir              = nil
  @loaded = false
  @activated = false
  @loaded_from = nil
  @original_platform = nil
  @installed_by_version = nil

  set_nil_attributes_to_nil
  set_not_nil_attributes_to_default_values

  @new_platform = Gem::Platform::RUBY

  self.name = name if name
  self.version = version if version

  if (platform = Gem.platforms.last) && platform != Gem::Platform::RUBY && platform != Gem::Platform.local
    self.platform = platform
  end

  yield self if block_given?
end

non_nil_attributes ()

Specification attributes that must be non-nil

# File lib/rubygems/specification.rb, line 1124
def self.non_nil_attributes
  @@non_nil_attributes.dup
end

normalize_yaml_input (input)

Make sure the YAML specification is properly formatted with dashes

# File lib/rubygems/specification.rb, line 1131
def self.normalize_yaml_input(input)
  result = input.respond_to?(:read) ? input.read : input
  result = "--- " + result unless result.start_with?("--- ")
  result = result.dup
  result.gsub!(/ !!null \n/, " \n")
  # date: 2011-04-26 00:00:00.000000000Z
  # date: 2011-04-26 00:00:00.000000000 Z
  result.gsub!(/^(date: \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\.\d+?)Z/, '\1 Z')
  result
end

outdated ()

Return a list of all outdated local gem names. This method is HEAVY as it must go fetch specifications from the server.

Use outdated_and_latest_version if you wish to retrieve the latest remote version as well.

# File lib/rubygems/specification.rb, line 1149
def self.outdated
  outdated_and_latest_version.map {|local, _| local.name }
end

outdated_and_latest_version () { |local_spec, latest_remote| ... }

Enumerates the outdated local gems yielding the local specification and the latest remote version.

This method may take some time to return as it must check each local gem against the server’s index.

# File lib/rubygems/specification.rb, line 1160
def self.outdated_and_latest_version
  return enum_for __method__ unless block_given?

  # TODO: maybe we should switch to rubygems' version service?
  fetcher = Gem::SpecFetcher.fetcher

  latest_specs(true).each do |local_spec|
    dependency =
      Gem::Dependency.new local_spec.name, ">= #{local_spec.version}"

    remotes, = fetcher.search_for_dependency dependency
    remotes  = remotes.map {|n, _| n.version }

    latest_remote = remotes.sort.last

    yield [local_spec, latest_remote] if
      latest_remote && local_spec.version < latest_remote
  end

  nil
end

remove_spec (spec)

Removes spec from the known specs.

# File lib/rubygems/specification.rb, line 868
def self.remove_spec(spec)
  specification_record.remove_spec(spec)
end

required_attribute? (name)

Is name a required attribute?

# File lib/rubygems/specification.rb, line 1185
def self.required_attribute?(name)
  @@required_attributes.include? name.to_sym
end

required_attributes ()

Required specification attributes

# File lib/rubygems/specification.rb, line 1192
def self.required_attributes
  @@required_attributes.dup
end

reset ()

Reset the list of known specs, running pre and post reset hooks registered in Gem.

# File lib/rubygems/specification.rb, line 1200
def self.reset
  @@dirs = nil
  Gem.pre_reset_hooks.each(&:call)
  @specification_record = nil
  clear_load_cache
  unresolved = unresolved_deps
  unless unresolved.empty?
    warn "WARN: Unresolved or ambiguous specs during Gem::Specification.reset:"
    unresolved.values.each do |dep|
      warn "      #{dep}"

      versions = find_all_by_name(dep.name).uniq(&:full_name)
      unless versions.empty?
        warn "      Available/installed versions of this gem:"
        versions.each {|s| warn "      - #{s.version}" }
      end
    end
    warn "WARN: Clearing out unresolved specs. Try 'gem cleanup <gem>'"
    warn "Please report a bug if this causes problems."
    unresolved.clear
  end
  Gem.post_reset_hooks.each(&:call)
end

specification_record ()

Keeps track of all currently known specifications

# File lib/rubygems/specification.rb, line 1227
def self.specification_record
  @specification_record ||= Gem::SpecificationRecord.new(dirs)
end

stubs ()

Returns a Gem::StubSpecification for every installed gem

# File lib/rubygems/specification.rb, line 801
def self.stubs
  specification_record.stubs
end

stubs_for (name)

Returns a Gem::StubSpecification for installed gem named name only returns stubs that match Gem.platforms

# File lib/rubygems/specification.rb, line 820
def self.stubs_for(name)
  specification_record.stubs_for(name)
end

unresolved_deps ()

DOC: This method needs documented or nodoc’d

# File lib/rubygems/specification.rb, line 1232
def self.unresolved_deps
  @unresolved_deps ||= Hash.new {|h, n| h[n] = Gem::Dependency.new n }
end

Public Instance Methods

_dump (limit)

Dump only crucial instance variables.

# File lib/rubygems/specification.rb, line 1346
def _dump(limit)
  Marshal.dump [
    @rubygems_version,
    @specification_version,
    @name,
    @version,
    date,
    @summary,
    @required_ruby_version,
    @required_rubygems_version,
    @original_platform,
    @dependencies,
    "", # rubyforge_project
    @email,
    @authors,
    @description,
    @homepage,
    true, # has_rdoc
    @new_platform,
    @licenses,
    @metadata,
  ]
end

abbreviate ()

Abbreviate the spec for downloading. Abbreviated specs are only used for searching, downloading and related activities and do not need deployment specific information (e.g. list of files). So we abbreviate the spec, making it much smaller for quicker downloads.

# File lib/rubygems/specification.rb, line 1437
def abbreviate
  self.files = []
  self.test_files = []
  self.rdoc_options = []
  self.extra_rdoc_files = []
  self.cert_chain = []
end

activate ()

Activate this spec, registering it as a loaded spec and adding it’s lib paths to $LOAD_PATH. Returns true if the spec was activated, false if it was previously activated. Freaks out if there are conflicts upon activation.

# File lib/rubygems/specification.rb, line 1376
def activate
  other = Gem.loaded_specs[name]
  if other
    check_version_conflict other
    return false
  end

  raise_if_conflicts

  activate_dependencies
  add_self_to_load_path

  Gem.loaded_specs[name] = self
  @activated = true
  @loaded = true

  true
end

activate_dependencies ()

Activate all unambiguously resolved runtime dependencies of this spec. Add any ambiguous dependencies to the unresolved list to be resolved later, as needed.

# File lib/rubygems/specification.rb, line 1400
def activate_dependencies
  unresolved = Gem::Specification.unresolved_deps

  runtime_dependencies.each do |spec_dep|
    if loaded = Gem.loaded_specs[spec_dep.name]
      next if spec_dep.matches_spec? loaded

      msg = "can't satisfy '#{spec_dep}', already activated '#{loaded.full_name}'"
      e = Gem::LoadError.new msg
      e.name = spec_dep.name

      raise e
    end

    begin
      specs = spec_dep.to_specs.uniq(&:full_name)
    rescue Gem::MissingSpecError => e
      raise Gem::MissingSpecError.new(e.name, e.requirement, "at: #{spec_file}")
    end

    if specs.size == 1
      specs.first.activate
    else
      name = spec_dep.name
      unresolved[name] = unresolved[name].merge spec_dep
    end
  end

  unresolved.delete self.name
end

add_bindir (executables)

Returns an array with bindir attached to each executable in the executables list

# File lib/rubygems/specification.rb, line 1473
def add_bindir(executables)
  return nil if executables.nil?

  if @bindir
    Array(executables).map {|e| File.join(@bindir, e) }
  else
    executables
  end
rescue StandardError
  nil
end

add_runtime_dependency (gem, *requirements)

Alias for: add_dependency

add_self_to_load_path ()

Adds this spec’s require paths to LOAD_PATH, in the proper location.

# File lib/rubygems/specification.rb, line 1512
def add_self_to_load_path
  return if default_gem?

  paths = full_require_paths

  Gem.add_to_load_path(*paths)
end

author ()

Singular reader for authors. Returns the first author in the list

# File lib/rubygems/specification.rb, line 1523
def author
  (val = authors) && val.first
end

authors ()

The list of author names who wrote this gem.

spec.authors = ['Chad Fowler', 'Jim Weirich', 'Rich Kilmer']

# File lib/rubygems/specification.rb, line 1532
def authors
  @authors ||= []
end

base_dir ()

# File lib/rubygems/specification.rb, line 2043
def base_dir
  return Gem.dir unless loaded_from
  @base_dir ||= if default_gem?
    File.dirname File.dirname File.dirname loaded_from
  else
    File.dirname File.dirname loaded_from
  end
end

bin_dir ()

Returns the full path to installed gem’s bin directory.

NOTE: do not confuse this with bindir, which is just ‘bin’, not a full path.

# File lib/rubygems/specification.rb, line 1542
def bin_dir
  @bin_dir ||= File.join gem_dir, bindir
end

bin_file (name)

Returns the full path to an executable named name in this gem.

# File lib/rubygems/specification.rb, line 1549
def bin_file(name)
  File.join bin_dir, name
end

build_args ()

Returns the build_args used to install the gem

# File lib/rubygems/specification.rb, line 1556
def build_args
  if File.exist? build_info_file
    build_info = File.readlines build_info_file
    build_info = build_info.map(&:strip)
    build_info.delete ""
    build_info
  else
    []
  end
end

build_info_dir ()

Returns the full path to the build info directory

# File lib/rubygems/specification.rb, line 1604
def build_info_dir
  File.join base_dir, "build_info"
end

build_info_file ()

Returns the full path to the file containing the build information generated when the gem was installed

# File lib/rubygems/specification.rb, line 1612
def build_info_file
  File.join build_info_dir, "#{full_name}.info"
end

cache_dir ()

Returns the full path to the cache directory containing this spec’s cached gem.

# File lib/rubygems/specification.rb, line 1620
def cache_dir
  @cache_dir ||= File.join base_dir, "cache"
end

cache_file ()

Returns the full path to the cached gem for this spec.

# File lib/rubygems/specification.rb, line 1627
def cache_file
  @cache_file ||= File.join cache_dir, "#{full_name}.gem"
end

conflicts ()

Return any possible conflicts against the currently loaded specs.

# File lib/rubygems/specification.rb, line 1634
def conflicts
  conflicts = {}
  runtime_dependencies.each do |dep|
    spec = Gem.loaded_specs[dep.name]
    if spec && !spec.satisfies_requirement?(dep)
      (conflicts[spec] ||= []) << dep
    end
  end
  env_req = Gem.env_requirement(name)
  (conflicts[self] ||= []) << env_req unless env_req.satisfied_by? version
  conflicts
end

date ()

The date this gem was created.

If SOURCE_DATE_EPOCH is set as an environment variable, use that to support reproducible builds; otherwise, default to the current UTC date.

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

# File lib/rubygems/specification.rb, line 1678
def date
  @date ||= Time.utc(*Gem.source_date_epoch.utc.to_a[3..5].reverse)
end

date= (date)

The date this gem was created

DO NOT set this, it is set automatically when the gem is packaged.

# File lib/rubygems/specification.rb, line 1698
def date=(date)
  # We want to end up with a Time object with one-day resolution.
  # This is the cleanest, most-readable, faster-than-using-Date
  # way to do it.
  @date = case date
          when String then
            if DateTimeFormat =~ date
              Time.utc($1.to_i, $2.to_i, $3.to_i)
            else
              raise(Gem::InvalidSpecificationException,
                    "invalid date format in specification: #{date.inspect}")
            end
          when Time, DateLike then
            Time.utc(date.year, date.month, date.day)
          else
            TODAY
  end
end

default_value (name)

The default value for specification attribute name

# File lib/rubygems/specification.rb, line 1738
def default_value(name)
  @@default_value[name]
end

dependencies ()

A list of Gem::Dependency objects this gem depends on.

Use add_dependency or add_development_dependency to add dependencies to a gem.

# File lib/rubygems/specification.rb, line 1748
def dependencies
  @dependencies ||= []
end

dependent_gems (check_dev=true)

Return a list of all gems that have a dependency on this gemspec. The list is structured with entries that conform to:

[depending_gem, dependency, [list_of_gems_that_satisfy_dependency]]

# File lib/rubygems/specification.rb, line 1758
def dependent_gems(check_dev=true)
  out = []
  Gem::Specification.each do |spec|
    deps = check_dev ? spec.dependencies : spec.runtime_dependencies
    deps.each do |dep|
      next unless satisfies_requirement?(dep)
      sats = []
      find_all_satisfiers(dep) do |sat|
        sats << sat
      end
      out << [spec, dep, sats]
    end
  end
  out
end

dependent_specs ()

Returns all specs that matches this spec’s runtime dependencies.

# File lib/rubygems/specification.rb, line 1777
def dependent_specs
  runtime_dependencies.map(&:to_specs).flatten
end

description= (str)

A detailed description of this gem. See also summary

# File lib/rubygems/specification.rb, line 1784
def description=(str)
  @description = str.to_s
end

development_dependencies ()

List of dependencies that are used for development

# File lib/rubygems/specification.rb, line 1791
def development_dependencies
  dependencies.select {|d| d.type == :development }
end

doc_dir (type = nil)

Returns the full path to this spec’s documentation directory. If type is given it will be appended to the end. For example:

spec.doc_dir      # => "/path/to/gem_repo/doc/a-1"

spec.doc_dir 'ri' # => "/path/to/gem_repo/doc/a-1/ri"

# File lib/rubygems/specification.rb, line 1803
def doc_dir(type = nil)
  @doc_dir ||= File.join base_dir, "doc", full_name

  if type
    File.join @doc_dir, type
  else
    @doc_dir
  end
end

executable ()

Singular accessor for executables

# File lib/rubygems/specification.rb, line 1840
def executable
  (val = executables) && val.first
end

executable= (o)

Singular accessor for executables

# File lib/rubygems/specification.rb, line 1847
def executable=(o)
  self.executables = [o]
end

executables= (value)

Sets executables to value, ensuring it is an array.

# File lib/rubygems/specification.rb, line 1854
def executables=(value)
  @executables = Array(value)
end

extensions= (extensions)

Sets extensions to extensions, ensuring it is an array.

# File lib/rubygems/specification.rb, line 1861
def extensions=(extensions)
  @extensions = Array extensions
end

extra_rdoc_files= (files)

Sets extra_rdoc_files to files, ensuring it is an array.

# File lib/rubygems/specification.rb, line 1868
def extra_rdoc_files=(files)
  @extra_rdoc_files = Array files
end

file_name ()

The default (generated) file name of the gem. See also spec_name.

spec.file_name # => "example-1.0.gem"

# File lib/rubygems/specification.rb, line 1877
def file_name
  "#{full_name}.gem"
end

files= (files)

Sets files to files, ensuring it is an array.

# File lib/rubygems/specification.rb, line 1884
def files=(files)
  @files = Array files
end

for_cache ()

Creates a duplicate spec without large blobs that aren’t used at runtime.

# File lib/rubygems/specification.rb, line 1902
def for_cache
  spec = dup

  spec.files = nil
  spec.test_files = nil

  spec
end

full_name ()

Calls superclass method Gem::BasicSpecification#full_name

# File lib/rubygems/specification.rb, line 1911
def full_name
  @full_name ||= super
end

gems_dir ()

# File lib/rubygems/specification.rb, line 1923
def gems_dir
  @gems_dir ||= File.join(base_dir, "gems")
end

has_conflicts? ()

Return true if there are possible conflicts against the currently loaded specs.

# File lib/rubygems/specification.rb, line 1660
def has_conflicts?
  return true unless Gem.env_requirement(name).satisfied_by?(version)
  runtime_dependencies.any? do |dep|
    spec = Gem.loaded_specs[dep.name]
    spec && !spec.satisfies_requirement?(dep)
  end
rescue ArgumentError => e
  raise e, "#{name} #{version}: #{e.message}"
end

initialize_copy (other_spec)

Duplicates Array and Gem::Requirement attributes from other_spec so state isn’t shared.

# File lib/rubygems/specification.rb, line 2018
def initialize_copy(other_spec)
  self.class.array_attributes.each do |name|
    name = :"@#{name}"
    next unless other_spec.instance_variable_defined? name

    begin
      val = other_spec.instance_variable_get(name)
      if val
        instance_variable_set name, val.dup
      elsif Gem.configuration.really_verbose
        warn "WARNING: #{full_name} has an invalid nil value for #{name}"
      end
    rescue TypeError
      e = Gem::FormatException.new \
        "#{full_name} has an invalid value for #{name}"

      e.file_path = loaded_from
      raise e
    end
  end

  @required_ruby_version = other_spec.required_ruby_version.dup
  @required_rubygems_version = other_spec.required_rubygems_version.dup
end

keep_only_files_and_directories ()

# File lib/rubygems/specification.rb, line 2582
def keep_only_files_and_directories
  @executables.delete_if      {|x| File.directory?(File.join(@bindir, x)) }
  @extensions.delete_if       {|x| File.directory?(x) && !File.symlink?(x) }
  @extra_rdoc_files.delete_if {|x| File.directory?(x) && !File.symlink?(x) }
  @files.delete_if            {|x| File.directory?(x) && !File.symlink?(x) }
  @test_files.delete_if       {|x| File.directory?(x) && !File.symlink?(x) }
end

lib_files ()

Files in the Gem under one of the require_paths

# File lib/rubygems/specification.rb, line 2074
def lib_files
  @files.select do |file|
    require_paths.any? do |path|
      file.start_with? path
    end
  end
end

license ()

Singular accessor for licenses

# File lib/rubygems/specification.rb, line 2085
def license
  licenses.first
end

licenses ()

Plural accessor for setting licenses

See license= for details

# File lib/rubygems/specification.rb, line 2094
def licenses
  @licenses ||= []
end

missing_extensions? ()

Is this specification missing its extensions? When this returns true you probably want to build_extensions

# File lib/rubygems/specification.rb, line 2131
def missing_extensions?
  return false if extensions.empty?
  return false if default_gem?
  return false if File.exist? gem_build_complete_path

  true
end

name_tuple ()

Return a NameTuple that represents this Specification

# File lib/rubygems/specification.rb, line 2162
def name_tuple
  Gem::NameTuple.new name, version, original_platform
end

normalize ()

Normalize the list of files so that:

All file lists have redundancies removed.
Files referenced in the extra_rdoc_files are included in the package file list.

# File lib/rubygems/specification.rb, line 2145
def normalize
  if defined?(@extra_rdoc_files) && @extra_rdoc_files
    @extra_rdoc_files.uniq!
    @files ||= []
    @files.concat(@extra_rdoc_files)
  end

  @files            = @files.uniq if @files
  @extensions       = @extensions.uniq if @extensions
  @test_files       = @test_files.uniq if @test_files
  @executables      = @executables.uniq if @executables
  @extra_rdoc_files = @extra_rdoc_files.uniq if @extra_rdoc_files
end

platform ()

The platform this gem runs on. See Gem::Platform for details.

# File lib/rubygems/specification.rb, line 2188
def platform
  @new_platform ||= Gem::Platform::RUBY # rubocop:disable Naming/MemoizedInstanceVariableName
end

rdoc_options= (options)

Sets rdoc_options to value, ensuring it is an array.

# File lib/rubygems/specification.rb, line 2254
def rdoc_options=(options)
  @rdoc_options = Array options
end

require_path ()

Singular accessor for require_paths

# File lib/rubygems/specification.rb, line 2261
def require_path
  (val = require_paths) && val.first
end

require_path= (path)

Singular accessor for require_paths

# File lib/rubygems/specification.rb, line 2268
def require_path=(path)
  self.require_paths = Array(path)
end

requirements= (req)

Set requirements to req, ensuring it is an array.

# File lib/rubygems/specification.rb, line 2275
def requirements=(req)
  @requirements = Array req
end

reset_nil_attributes_to_default ()

Reset nil attributes to their default values to make the spec valid

# File lib/rubygems/specification.rb, line 2641
def reset_nil_attributes_to_default
  nil_attributes = self.class.non_nil_attributes.find_all do |name|
    !instance_variable_defined?("@#{name}") || instance_variable_get("@#{name}").nil?
  end

  nil_attributes.each do |attribute|
    default = default_value attribute

    value = case default
            when Time, Numeric, Symbol, true, false, nil then default
            else default.dup
    end

    instance_variable_set "@#{attribute}", value
  end

  @installed_by_version ||= nil

  nil
end

ri_dir ()

Returns the full path to this spec’s ri directory.

# File lib/rubygems/specification.rb, line 2286
def ri_dir
  @ri_dir ||= File.join base_dir, "ri", full_name
end

runtime_dependencies ()

List of dependencies that will automatically be activated at runtime.

# File lib/rubygems/specification.rb, line 2319
def runtime_dependencies
  dependencies.select(&:runtime?)
end

sanitize ()

Sanitize the descriptive fields in the spec. Sometimes non-ASCII characters will garble the site index. Non-ASCII characters will be replaced by their XML entity equivalent.

# File lib/rubygems/specification.rb, line 1450
def sanitize
  self.summary              = sanitize_string(summary)
  self.description          = sanitize_string(description)
  self.post_install_message = sanitize_string(post_install_message)
  self.authors              = authors.collect {|a| sanitize_string(a) }
end

sanitize_string (string)

Sanitize a single string.

# File lib/rubygems/specification.rb, line 1460
def sanitize_string(string)
  return string unless string

  # HACK: the #to_s is in here because RSpec has an Array of Arrays of
  # Strings for authors.  Need a way to disallow bad values on gemspec
  # generation.  (Probably won't happen.)
  string.to_s
end

satisfies_requirement? (dependency)

Checks if this specification meets the requirement of dependency.

# File lib/rubygems/specification.rb, line 2335
def satisfies_requirement?(dependency)
  @name == dependency.name &&
    dependency.requirement.satisfied_by?(@version)
end

sort_obj ()

Returns an object you can use to sort specifications in sort_by.

# File lib/rubygems/specification.rb, line 2343
def sort_obj
  [@name, @version, Gem::Platform.sort_priority(@new_platform)]
end

spec_dir ()

Returns the full path to the directory containing this spec’s gemspec file. eg: /usr/local/lib/ruby/gems/1.8/specifications

# File lib/rubygems/specification.rb, line 2358
def spec_dir
  @spec_dir ||= File.join base_dir, "specifications"
end

spec_file ()

Returns the full path to this spec’s gemspec file. eg: /usr/local/lib/ruby/gems/1.8/specifications/mygem-1.0.gemspec

# File lib/rubygems/specification.rb, line 2366
def spec_file
  @spec_file ||= File.join spec_dir, "#{full_name}.gemspec"
end

spec_name ()

The default name of the gemspec. See also file_name

spec.spec_name # => "example-1.0.gemspec"

# File lib/rubygems/specification.rb, line 2375
def spec_name
  "#{full_name}.gemspec"
end

stubbed? ()

# File lib/rubygems/specification.rb, line 2619
def stubbed?
  false
end

summary= (str)

A short summary of this gem’s description.

# File lib/rubygems/specification.rb, line 2382
def summary=(str)
  @summary = str.to_s.strip.
    gsub(/(\w-)\n[ \t]*(\w)/, '\1\2').gsub(/\n[ \t]*/, " ") # so. weird.
end

to_ruby ()

Returns a Ruby code representation of this specification, such that it can be eval’ed and reconstruct the same specification later. Attributes that still have their default values are omitted.

# File lib/rubygems/specification.rb, line 2425
def to_ruby
  result = []
  result << "# -*- encoding: utf-8 -*-"
  result << "#{Gem::StubSpecification::PREFIX}#{name} #{version} #{platform} #{raw_require_paths.join("\0")}"
  result << "#{Gem::StubSpecification::PREFIX}#{extensions.join "\0"}" unless
    extensions.empty?
  result << nil
  result << "Gem::Specification.new do |s|"

  result << "  s.name = #{ruby_code name}"
  result << "  s.version = #{ruby_code version}"
  unless platform.nil? || platform == Gem::Platform::RUBY
    result << "  s.platform = #{ruby_code original_platform}"
  end
  result << ""
  result << "  s.required_rubygems_version = #{ruby_code required_rubygems_version} if s.respond_to? :required_rubygems_version="

  if metadata && !metadata.empty?
    result << "  s.metadata = #{ruby_code metadata} if s.respond_to? :metadata="
  end
  result << "  s.require_paths = #{ruby_code raw_require_paths}"

  handled = [
    :dependencies,
    :name,
    :platform,
    :require_paths,
    :required_rubygems_version,
    :specification_version,
    :version,
    :has_rdoc,
    :default_executable,
    :metadata,
    :signing_key,
  ]

  @@attributes.each do |attr_name|
    next if handled.include? attr_name
    current_value = send(attr_name)
    if current_value != default_value(attr_name) || self.class.required_attribute?(attr_name)
      result << "  s.#{attr_name} = #{ruby_code current_value}"
    end
  end

  if String === signing_key
    result << "  s.signing_key = #{ruby_code signing_key}"
  end

  if @installed_by_version
    result << nil
    result << "  s.installed_by_version = #{ruby_code Gem::VERSION}"
  end

  unless dependencies.empty?
    result << nil
    result << "  s.specification_version = #{specification_version}"
    result << nil

    dependencies.each do |dep|
      dep.instance_variable_set :@type, :runtime if dep.type.nil? # HACK
      result << "  s.add_#{dep.type}_dependency(%q<#{dep.name}>.freeze, #{ruby_code dep.requirements_list})"
    end
  end

  result << "end"
  result << nil

  result.join "\n"
end

to_ruby_for_cache ()

Returns a Ruby lighter-weight code representation of this specification, used for indexing only.

See to_ruby.

# File lib/rubygems/specification.rb, line 2501
def to_ruby_for_cache
  for_cache.to_ruby
end

to_spec ()

Returns self

# File lib/rubygems/specification.rb, line 2512
def to_spec
  self
end

traverse (trail = [], visited = {}, &block)

Recursively walk dependencies of this spec, executing the block for each hop.

# File lib/rubygems/specification.rb, line 2543
def traverse(trail = [], visited = {}, &block)
  trail.push(self)
  begin
    runtime_dependencies.each do |dep|
      dep.matching_specs(true).each do |dep_spec|
        next if visited.key?(dep_spec)
        visited[dep_spec] = true
        trail.push(dep_spec)
        begin
          result = block[self, dep, dep_spec, trail]
        ensure
          trail.pop
        end
        next if result == :next
        spec_name = dep_spec.name
        dep_spec.traverse(trail, visited, &block) unless
          trail.any? {|s| s.name == spec_name }
      end
    end
  ensure
    trail.pop
  end
end

validate (packaging = true, strict = false)

Checks that the specification contains all required fields, and does a very basic sanity check.

Raises InvalidSpecificationException if the spec does not pass the checks..

# File lib/rubygems/specification.rb, line 2574
def validate(packaging = true, strict = false)
  normalize

  validation_policy = Gem::SpecificationPolicy.new(self)
  validation_policy.packaging = packaging
  validation_policy.validate(strict)
end

validate_dependencies ()

# File lib/rubygems/specification.rb, line 2599
def validate_dependencies
  Gem::SpecificationPolicy.new(self).validate_dependencies
end

validate_for_resolution ()

# File lib/rubygems/specification.rb, line 2590
def validate_for_resolution
  Gem::SpecificationPolicy.new(self).validate_for_resolution
end

validate_metadata ()

# File lib/rubygems/specification.rb, line 2594
def validate_metadata
  Gem::SpecificationPolicy.new(self).validate_metadata
end

validate_permissions ()

# File lib/rubygems/specification.rb, line 2604
def validate_permissions
  Gem::SpecificationPolicy.new(self).validate_permissions
end

version= (version)

Set the version to version.

# File lib/rubygems/specification.rb, line 2612
def version=(version)
  @version = Gem::Version.create(version)
  return if @version.nil?

  invalidate_memoized_attributes
end