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Class: Gem::Specification

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, Deprecate, Enumerable, BasicSpecification
Instance Chain:
Inherits: Gem::BasicSpecification
Defined in: lib/rubygems/specification.rb

Overview

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'
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.

Constant Summary

Required gemspec attributes

Optional gemspec attributes

Recommended gemspec attributes

Specification internals

Class Method Summary

Deprecate - Extended

deprecate

Simple deprecation method that deprecates #name by wrapping it up in a dummy method.

skip_during

Temporarily turn off warnings.

BasicSpecification - Inherited

Instance Attribute Summary

BasicSpecification - Inherited

#base_dir

Returns the full path to the base gem directory.

#extension_dir

Returns full path to the directory where gem's extensions are installed.

#full_gem_path

The full path to the gem (install path + full name).

#loaded_from

The path this gemspec was loaded from.

#activated?

True when the gem has been activated.

#default_gem?,
#stubbed?

Whether this specification is stubbed - i.e.

#have_extensions?

Instance Method Summary

BasicSpecification - Inherited

#contains_requirable_file?

Return true if this spec can require file.

#datadir

The path to the data directory for this gem.

#extensions_dir

Returns path to the extensions directory.

#full_name

Returns the full name (name-version) of this ::Gem.

#full_require_paths

Full paths in the gem to add to $LOAD_PATH when this gem is activated.

#gem_dir

Returns the full path to this spec's gem directory.

#gems_dir

Returns the full path to the gems directory containing this spec's gem directory.

#lib_dirs_glob

Returns a string usable in Dir.glob to match all requirable paths for this spec.

#matches_for_glob

Return all files in this gem that match for glob.

#name

Name of the gem.

#platform

Platform of the gem.

#require_paths

Paths in the gem to add to $LOAD_PATH when this gem is activated.

#source_paths

Returns the paths to the source files for use with analysis and documentation tools.

#to_fullpath

Full path of the target library file.

#to_spec

Return a Specification from this gem.

#version

Version of the gem.

#have_file?

Constructor Details

.new(name = nil, version = nil) {|_self| ... } ⇒ Specification

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

Yields:

  • (_self)

Yield Parameters:

  • _self (Specification)

    the object that the method was called on

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2028

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

  @@nil_attributes.each do |key|
    instance_variable_set "@#{key}", nil
  end

  @@non_nil_attributes.each do |key|
    default = default_value(key)
    value = Dupable[key] ? default.dup : default
    instance_variable_set "@#{key}", value
  end

  @new_platform = Gem::Platform::RUBY

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

  yield self if block_given?
end

Class Attribute Details

.all (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 930

def self.all
  warn "NOTE: Specification.all called from #{caller.first}" unless
    Gem::Deprecate.skip
  _all
end

.all=(specs) (rw)

Sets the known specs to specs. Not guaranteed to work for you in the future. Use at your own risk. Caveat emptor. Doomy doom doom. Etc etc.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 948

def self.all= specs
  @@stubs_by_name = specs.group_by(&:name)
  @@all = @@stubs = specs
end

.dirs (rw)

Return the directories that Specification uses to find specs.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 981

def self.dirs
  @@dirs ||= Gem.path.collect { |dir|
    File.join dir.dup.untaint, "specifications"
  }
end

.dirs=(dirs) (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 991

def self.dirs= dirs
  self.reset

  @@dirs = Array(dirs).map { |dir| File.join dir, "specifications" }
end

Class Method Details

._load(str)

Load custom marshal format, re-initializing defaults as needed

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1306

def self._load(str)
  array = Marshal.load str

  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 then
                  spec.instance_variable_set :@specification_version,
                                             current_version
                  MARSHAL_FIELDS[current_version]
                else
                  MARSHAL_FIELDS[spec.specification_version]
                end

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

  # Cleanup any YAML::PrivateType. They only show up for an old bug
  # where nil => null, so just convert them to nil based on the type.

  array.map! { |e| e.kind_of?(YAML::PrivateType) ? nil : e }

  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]
  spec.instance_variable_set :@rubyforge_project,         array[10]
  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 :@license,                   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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 885

def self.add_spec spec
  warn "Gem::Specification.add_spec is deprecated and will be removed in Rubygems 3.0" unless Gem::Deprecate.skip
  # TODO: find all extraneous adds
  # puts
  # p :add_spec => [spec.full_name, caller.reject { |s| s =~ /minitest/ }]

  # TODO: flush the rest of the crap from the tests
  # raise "no dupes #{spec.full_name} in #{all_names.inspect}" if
  #   _all.include? spec

  raise "nil spec!" unless spec # TODO: remove once we're happy with tests

  return if _all.include? spec

  _all << spec
  stubs << spec
  (@@stubs_by_name[spec.name] ||= []) << spec
  sort_by!(@@stubs_by_name[spec.name]) { |s| s.version }
  _resort!(_all)
  _resort!(stubs)
end

.add_specs(*specs)

Adds multiple specs to the known specifications.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 910

def self.add_specs *specs
  warn "Gem::Specification.add_specs is deprecated and will be removed in Rubygems 3.0" unless Gem::Deprecate.skip

  raise "nil spec!" if specs.any?(&:nil?) # TODO: remove once we're happy

  # TODO: this is much more efficient, but we need the extra checks for now
  # _all.concat specs
  # _resort!

  Gem::Deprecate.skip_during do
    specs.each do |spec| # TODO: slow
      add_spec spec
    end
  end
end

.all_names

Return full names of all specs in sorted order.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 956

def self.all_names
  self._all.map(&:full_name)
end

.array_attributes

Return the list of all array-oriented instance variables.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 965

def self.array_attributes
  @@array_attributes.dup
end

.attribute_names

Return the list of all instance variables.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 974

def self.attribute_names
  @@attributes.dup
end

.default_stubs(pattern) (private)

[ GitHub ]

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

def self.default_stubs pattern
  base_dir = Gem.default_dir
  gems_dir = File.join base_dir, "gems"
  gemspec_stubs_in(default_specifications_dir, pattern) do |path|
    Gem::StubSpecification.default_gemspec_stub(path, base_dir, gems_dir)
  end
end

.each

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1003

def self.each
  return enum_for(:each) unless block_given?

  self._all.each do |x|
    yield x
  end
end

.find_active_stub_by_path(path)

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1056

def self.find_active_stub_by_path path
  stub = @@active_stub_with_requirable_file[path] ||= (stubs.find { |s|
    s.activated? and s.contains_requirable_file? path
  } || NOT_FOUND)
  stub.this
end

.find_all_by_name(name, *requirements)

Returns every spec that matches #name and optional #requirements.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1014

def self.find_all_by_name name, *requirements
  requirements = Gem::Requirement.default if requirements.empty?

  # TODO: maybe try: find_all { |s| spec === dep }

  Gem::Dependency.new(name, *requirements).matching_specs
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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1026

def self.find_by_name name, *requirements
  requirements = Gem::Requirement.default if requirements.empty?

  # TODO: maybe try: find { |s| spec === dep }

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

.find_by_path(path)

Return the best specification that contains the file matching Gem.path.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1037

def self.find_by_path path
  path = path.dup.freeze
  spec = @@spec_with_requirable_file[path] ||= (stubs.find { |s|
    s.contains_requirable_file? path
  } || NOT_FOUND)
  spec.to_spec
end

.find_in_unresolved(path)

Return currently unresolved specs that contain the file matching Gem.path.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1066

def self.find_in_unresolved path
  # TODO: do we need these?? Kill it
  specs = unresolved_deps.values.map { |dep| dep.to_specs }.flatten

  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 Gem.path.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1077

def self.find_in_unresolved_tree path
  specs = unresolved_deps.values.map { |dep| dep.to_specs }.flatten

  specs.reverse_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 Gem.path amongst the specs that are not activated.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1049

def self.find_inactive_by_path path
  stub = stubs.find { |s|
    s.contains_requirable_file? path unless s.activated?
  }
  stub && stub.to_spec
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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1101

def self.from_yaml(input)
  Gem.load_yaml

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

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

  unless Gem::Specification === spec then
    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
end

.gemspec_stubs_in(dir, pattern) (private)

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 751

def self.gemspec_stubs_in dir, pattern
  Dir[File.join(dir, pattern)].map { |path| yield path }.select(&:valid?)
end

.installed_stubs(dirs, pattern) (private)

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 765

def self.installed_stubs dirs, pattern
  map_stubs(dirs, pattern) do |path, base_dir, gems_dir|
    Gem::StubSpecification.gemspec_stub(path, base_dir, gems_dir)
  end
end

.latest_specs(prerelease = false)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1125

def self.latest_specs prerelease = false
  _latest_specs Gem::Specification._all, prerelease
end

.load(file)

Loads Ruby format gemspec from file.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1149

def self.load file
  return unless file

  _spec = LOAD_CACHE[file]
  return _spec if _spec

  file = file.dup.untaint
  return unless File.file?(file)

  code = if defined? Encoding
           File.read file, :mode => 'r:UTF-8:-'
         else
           File.read file
         end

  code.untaint

  begin
    _spec = eval code, binding, file

    if Gem::Specification === _spec
      _spec.loaded_from = File.expand_path file.to_s
      LOAD_CACHE[file] = _spec
      return _spec
    end

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

  nil
end

.load_defaults

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 873

def self.load_defaults
  each_spec([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

.non_nil_attributes

Specification attributes that must be non-nil

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1188

def self.non_nil_attributes
  @@non_nil_attributes.dup
end

.normalize_yaml_input(input)

Make sure the ::YAML specification is properly formatted with dashes

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1195

def self.normalize_yaml_input(input)
  result = input.respond_to?(:read) ? input.read : input
  result = "--- " + result unless result =~ /\A--- /
  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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1213

def self.outdated
  outdated_and_latest_version.map { |local, _| local.name }
end

.outdated_and_latest_version

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.

[ GitHub ]

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

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 and local_spec.version < latest_remote
  end

  nil
end

.remove_spec(spec)

Removes spec from the known specs.

[ GitHub ]

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

def self.remove_spec spec
  warn "Gem::Specification.remove_spec is deprecated and will be removed in Rubygems 3.0" unless Gem::Deprecate.skip
  _all.delete spec
  stubs.delete_if { |s| s.full_name == spec.full_name }
  (@@stubs_by_name[spec.name] || []).delete_if { |s| s.full_name == spec.full_name }
  reset
end

.required_attribute?(name) ⇒ Boolean

Is #name a required attribute?

[ GitHub ]

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

def self.required_attribute?(name)
  @@required_attributes.include? name.to_sym
end

.required_attributes

Required specification attributes

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1267

def self.required_attributes
  @@required_attributes.dup
end

.reset

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1275

def self.reset
  @@dirs = nil
  Gem.pre_reset_hooks.each { |hook| hook.call }
  @@all = nil
  @@stubs = nil
  @@stubs_by_name = {}
  @@spec_with_requirable_file          = {}
  @@active_stub_with_requirable_file   = {}
  _clear_load_cache
  unresolved = unresolved_deps
  unless unresolved.empty? then
    w = "W" + "ARN"
    warn "#{w}: Unresolved specs during Gem::Specification.reset:"
    unresolved.values.each do |dep|
      warn "      #{dep}"
    end
    warn "#{w}: Clearing out unresolved specs."
    warn "Please report a bug if this causes problems."
    unresolved.clear
  end
  Gem.post_reset_hooks.each { |hook| hook.call }
end

.sort_by!(list, &block) (private)

FIXME: remove when 1.8 is dropped

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 815

def self.sort_by! list, &block
  list.sort_by!(&block)
end

.stubs

Returns a StubSpecification for every installed gem

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 831

def self.stubs
  @@stubs ||= begin
    pattern = "*.gemspec"
    stubs = default_stubs(pattern).concat installed_stubs(dirs, pattern)
    stubs = uniq_by(stubs) { |stub| stub.full_name }

    _resort!(stubs)
    @@stubs_by_name = stubs.group_by(&:name)
    stubs
  end
end

.stubs_for(name)

Returns a StubSpecification for installed gem named #name

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 848

def self.stubs_for name
  if @@stubs
    @@stubs_by_name[name] || []
  else
    pattern = "#{name}-*.gemspec"
    stubs = default_stubs(pattern) + installed_stubs(dirs, pattern)
    stubs = uniq_by(stubs) { |stub| stub.full_name }.group_by(&:name)
    stubs.each_value { |v| sort_by!(v) { |i| i.version } }

    @@stubs_by_name.merge! stubs
    @@stubs_by_name[name] ||= EMPTY
  end
end

.unresolved_deps

DOC: This method needs documented or nodoc'd

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1299

def self.unresolved_deps
  @unresolved_deps ||= Hash.new { |h, n| h[n] = Gem::Dependency.new n }
end

Instance Attribute Details

#activated? (rw)

Alias for #activated.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 690

alias :activated? :activated

#author (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1562

def author
  val = authors and val.first
end

#author=(o) (rw)

Singular writer for #authors

Usage:

spec.author = 'John Jones'
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 258

def author= o
  self.authors = [o]
end

#authors (rw)

The list of author names who wrote this gem.

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

  
# File 'lib/rubygems/specification.rb', line 1571

def authors
  @authors ||= []
end

#authors=(value) (rw)

Sets the list of authors, ensuring it is an array.

Usage:

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

  
# File 'lib/rubygems/specification.rb', line 269

def authors= value
  @authors = Array(value).flatten.grep(String)
end

#bindir (rw)

The path in the gem for executable scripts. Usually 'bin'

Usage:

spec.bindir = 'bin'
[ GitHub ]

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

attr_accessor :bindir

#bundled_gem_in_old_ruby?Boolean (readonly)

Used to detect if the gem is bundled in older version of Ruby, but not detectable as default gem (see BasicSpecification#default_gem?).

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1658

def bundled_gem_in_old_ruby?
  !default_gem? &&
    RUBY_VERSION < "2.0.0" &&
    summary == "This #{name} is bundled with Ruby"
end

#cert_chain (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 379

attr_accessor :cert_chain

#date (rw)

The date this gem was created. Lazily defaults to the current UTC date.

There is no need to set this in your gem specification.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1722

def date
  @date ||= TODAY
end

#date=(date) (rw)

The date this gem was created

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1742

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 then
              Time.utc($1.to_i, $2.to_i, $3.to_i)

            # Workaround for where the date format output from psych isn't
            # parsed as a Time object by syck and thus comes through as a
            # string.
            elsif /\A(\d{4})-(\d{2})-(\d{2}) \d{2}:\d{2}:\d{2}\.\d+?Z\z/ =~ date then
              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_executable=(value) (rw)

Sets the default executable for this gem.

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

[ GitHub ]

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

attr_writer :default_executable

#description (rw)

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
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 395

attr_reader :description

#description=(str) (rw)

A detailed description of this gem. See also #summary

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1833

def description= str
  @description = str.to_s
end

#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']
[ GitHub ]

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

attr_accessor :email

#executable (rw)

Singular accessor for #executables

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1890

def executable
  val = executables and val.first
end

#executable=(o) (rw)

Singular accessor for #executables

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1897

def executable=o
  self.executables = [o]
end

#executables (rw)

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'
[ GitHub ]

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

def executables
  @executables ||= []
end

#executables=(value) (rw)

Sets executables to value, ensuring it is an array. Don't use this, push onto the array instead.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1905

def executables= value
  # TODO: warn about setting instead of pushing
  @executables = Array(value)
end

#extensions (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 523

def extensions
  @extensions ||= []
end

#extensions=(extensions) (rw)

Sets extensions to #extensions, ensuring it is an array. Don't use this, push onto the array instead.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1914

def extensions= extensions
  # TODO: warn about setting instead of pushing
  @extensions = Array extensions
end

#extra_rdoc_files (rw)

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']
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 539

def extra_rdoc_files
  @extra_rdoc_files ||= []
end

#extra_rdoc_files=(files) (rw)

Sets extra_rdoc_files to #files, ensuring it is an array. Don't use this, push onto the array instead.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1923

def extra_rdoc_files= files
  # TODO: warn about setting instead of pushing
  @extra_rdoc_files = Array files
end

#files (rw)

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]*',
                      'test/**/*'].to_a

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

  
# File 'lib/rubygems/specification.rb', line 352

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

#files=(files) (rw)

Sets files to #files, ensuring it is an array.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1940

def files= files
  @files = Array files
end

#has_conflicts?Boolean (readonly)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1706

def has_conflicts?
  self.dependencies.any? { |dep|
    if dep.runtime? then
      spec = Gem.loaded_specs[dep.name]
      spec and not spec.satisfies_requirement? dep
    else
      false
    end
  }
end

#homepage (rw)

The URL of this gem's home page

Usage:

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

  
# File 'lib/rubygems/specification.rb', line 418

attr_accessor :homepage

#license (rw)

Singular accessor for #licenses

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2123

def license
  licenses.first
end

#license=(o) (rw)

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/alphabetical approved.

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

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 rights to use the code for any purpose.

You can set multiple licenses with #licenses=

Usage:

spec.license = 'MIT'
[ GitHub ]

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

def license=o
  self.licenses = [o]
end

#licenses (rw)

Plural accessor for setting licenses

See #license= for details

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2132

def licenses
  @licenses ||= []
end

#licenses=(licenses) (rw)

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']
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 606

def licenses= licenses
  @licenses = Array licenses
end

#metadata (rw)

:attr_accessor: metadata

The metadata holds extra data for this gem that may be useful to other consumers and is settable by gem authors without requiring an update to the rubygems software.

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

To add metadata for the location of a issue tracker:

s. = { "issue_tracker" => "https://example/issues" }
[ GitHub ]

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

attr_accessor :

#missing_extensions?Boolean (readonly)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2170

def missing_extensions?
  return false if default_gem?
  return false if extensions.empty?
  return false if installed_by_version < Gem::Version.new('2.2.0.preview.2')
  return false if File.exist? gem_build_complete_path

  true
end

#name (rw)

This gem's name.

Usage:

spec.name = 'rake'
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 197

attr_accessor :name

#platform (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2228

def platform
  @new_platform ||= Gem::Platform::RUBY
end

#platform=(platform) (rw)

The platform this gem runs on.

This is usually Platform::RUBY or 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 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
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 296

def platform= platform
  if @original_platform.nil? or
     @original_platform == Gem::Platform::RUBY then
    @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

  @new_platform
end

#post_install_message (rw)

A message that gets displayed after the gem is installed.

Usage:

spec.post_install_message = "Thanks for installing!"
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 427

attr_accessor :post_install_message

#rdoc_options (rw)

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

Usage:

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

  
# File 'lib/rubygems/specification.rb', line 619

def rdoc_options
  @rdoc_options ||= []
end

#rdoc_options=(options) (rw)

Sets rdoc_options to value, ensuring it is an array. Don't use this, push onto the array instead.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2296

def rdoc_options= options
  # TODO: warn about setting instead of pushing
  @rdoc_options = Array options
end

#require_path (rw)

Singular accessor for #require_paths

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2304

def require_path
  val = require_paths and val.first
end

#require_path=(path) (rw)

Singular accessor for #require_paths

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2311

def require_path= path
  self.require_paths = Array(path)
end

#require_paths=(val) (writeonly)

Paths in the gem to add to $LOAD_PATH when this gem is activated.

See also #require_paths

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 = ['.']
[ GitHub ]

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

def require_paths=(val)
  @require_paths = Array(val)
end

#required_ruby_version (rw)

The version of Ruby required by this gem

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 432

attr_reader :required_ruby_version

#required_ruby_version=(req) (rw)

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">

Because patch-level is taken into account, be very careful specifying using <=: <= 2.2.2 will not match any patch-level of 2.2.2 after the p0 release. It is much safer to specify < 2.2.3 instead

Usage:

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

# Only with ruby 2.0.x
spec.required_ruby_version = '~> 2.0'

# Only with ruby between 2.2.0 and 2.2.2
spec.required_ruby_version = ['>= 2.2.0', '< 2.2.3']
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 646

def required_ruby_version= req
  @required_ruby_version = Gem::Requirement.create req
end

#required_rubygems_version (rw)

The RubyGems version required by this gem

[ GitHub ]

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

attr_reader :required_rubygems_version

#required_rubygems_version=(req) (rw)

The RubyGems version required by this gem

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 653

def required_rubygems_version= req
  @required_rubygems_version = Gem::Requirement.create req
end

#requirements (rw)

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'
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 666

def requirements
  @requirements ||= []
end

#requirements=(req) (rw)

Set requirements to req, ensuring it is an array. Don't use this, push onto the array instead.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2319

def requirements= req
  # TODO: warn about setting instead of pushing
  @requirements = Array req
end

#rubyforge_project (rw)

The rubyforge project this gem lives under. i.e. RubyGems' rubyforge_project is “rubygems”.

This option is deprecated.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 717

attr_accessor :rubyforge_project

#rubygems_version (rw)

The version of RubyGems used to create this gem.

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 238

attr_accessor :rubygems_version

#signing_key (rw)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 442

attr_accessor :signing_key

#specification_version (rw)

The Specification version of this gemspec.

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 724

attr_accessor :specification_version

#stubbed?Boolean (readonly)

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2969

def stubbed?
  false
end

#summary (rw)

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"
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 249

attr_reader :summary

#summary=(str) (rw)

A short summary of this gem's description.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2427

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

#version (rw)

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'
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 210

attr_reader :version

#version=(version) (rw)

Set the version to #version, potentially also setting required_rubygems_version if #version indicates it is a prerelease.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2961

def version= version
  @version = Gem::Version.create(version)
  self.required_rubygems_version = '> 1.3.1' if @version.prerelease?
  invalidate_memoized_attributes

  return @version
end

Instance Method Details

#_dump(limit)

Dump only crucial instance variables.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1374

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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1461

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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1404

def activate
  other = Gem.loaded_specs[self.name]
  if other then
    check_version_conflict other
    return false
  end

  raise_if_conflicts

  activate_dependencies
  add_self_to_load_path

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

  return 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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1428

def activate_dependencies
  unresolved = Gem::Specification.unresolved_deps

  self.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

    specs = spec_dep.to_specs

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

  unresolved.delete self.name
end

#activated (rw) Also known as: #activated?

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

[ GitHub ]

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

attr_accessor :activated

#add_bindir(executables)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1503

def add_bindir(executables)
  return nil if executables.nil?

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

#add_dependency(gem, *requirements)

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1537

alias add_dependency add_runtime_dependency

#add_dependency_with_type(dependency, type, *requirements) (private)

Adds a dependency on gem dependency with type type that requires #requirements. Valid types are currently :runtime and :development.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1520

def add_dependency_with_type(dependency, type, *requirements)
  requirements = if requirements.empty? then
                   Gem::Requirement.default
                 else
                   requirements.flatten
                 end

  unless dependency.respond_to?(:name) &&
         dependency.respond_to?(:requirement)
    dependency = Gem::Dependency.new(dependency.to_s, requirements, type)
  end

  dependencies << dependency
end

#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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 476

def add_development_dependency(gem, *requirements)
  add_dependency_with_type(gem, :development, *requirements)
end

#add_runtime_dependency(gem, *requirements) Also known as: #add_dependency

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

Usage:

spec.add_runtime_dependency 'example', '~> 1.1', '>= 1.1.4'
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 487

def add_runtime_dependency(gem, *requirements)
  add_dependency_with_type(gem, :runtime, *requirements)
end

#add_self_to_load_path

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1542

def add_self_to_load_path
  return if default_gem?

  paths = full_require_paths

  # gem directories must come after -I and ENV['RUBYLIB']
  insert_index = Gem.load_path_insert_index

  if insert_index then
    # gem directories must come after -I and ENV['RUBYLIB']
    $LOAD_PATH.insert(insert_index, *paths)
  else
    # we are probably testing in core, -I and RUBYLIB don't apply
    $LOAD_PATH.unshift(*paths)
  end
end

#base_dir

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2081

def base_dir
  return Gem.dir unless loaded_from
  @base_dir ||= if default_gem? then
                  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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1581

def bin_dir
  @bin_dir ||= File.join gem_dir, bindir # TODO: this is unfortunate
end

#bin_file(name)

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1588

def bin_file name
  File.join bin_dir, name
end

#build_args

Returns the build_args used to install the gem

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1595

def build_args
  if File.exist? build_info_file
    build_info = File.readlines build_info_file
    build_info = build_info.map { |x| x.strip }
    build_info.delete ""
    build_info
  else
    []
  end
end

#build_info_dir

Returns the full path to the build info directory

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1642

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1650

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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1668

def cache_dir
  @cache_dir ||= File.join base_dir, "cache"
end

#cache_file

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1675

def cache_file
  @cache_file ||= File.join cache_dir, "#{full_name}.gem"
end

#conflicts

Return any possible conflicts against the currently loaded specs.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1682

def conflicts
  conflicts = {}
  self.runtime_dependencies.each { |dep|
    spec = Gem.loaded_specs[dep.name]
    if spec and not spec.satisfies_requirement? dep
      (conflicts[spec] ||= []) << dep
    end
  }
  conflicts
end

#default_value(name)

The default value for specification attribute #name

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1787

def default_value name
  @@default_value[name]
end

#dependencies

A list of Dependency objects this gem depends on.

Use #add_dependency or #add_development_dependency to add dependencies to a gem.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1797

def dependencies
  @dependencies ||= []
end

#dependent_gems

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]]
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1807

def dependent_gems
  out = []
  Gem::Specification.each do |spec|
    spec.dependencies.each do |dep|
      if self.satisfies_requirement?(dep) then
        sats = []
        find_all_satisfiers(dep) do |sat|
          sats << sat
        end
        out << [spec, dep, sats]
      end
    end
  end
  out
end

#dependent_specs

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1826

def dependent_specs
  runtime_dependencies.map { |dep| dep.to_specs }.flatten
end

#development_dependencies

List of dependencies that are used for development

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1840

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"
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1852

def doc_dir type = nil
  @doc_dir ||= File.join base_dir, 'doc', full_name

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

#file_name

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

spec.file_name # => "example-1.0.gem"
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1933

def file_name
  "#{full_name}.gem"
end

#find_all_satisfiers(dep) (private)

Finds all gems that satisfy dep

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1947

def find_all_satisfiers dep
  Gem::Specification.each do |spec|
    yield spec if spec.satisfies_requirement? dep
  end
end

#for_cache

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1958

def for_cache
  spec = dup

  spec.files = nil
  spec.test_files = nil

  spec
end

#full_name

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1967

def full_name
  @full_name ||= super
end

#gems_dir

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1978

def gems_dir
  # TODO: this logic seems terribly broken, but tests fail if just base_dir
  @gems_dir ||= File.join(loaded_from && base_dir || Gem.dir, "gems")
end

#initialize_copy(other_spec)

Duplicates array_attributes from other_spec so state isn't shared.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2059

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 then
        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
end

#invalidate_memoized_attributes (private)

Expire memoized instance variables that can incorrectly generate, replace or miss files due changes in certain attributes used to compute them.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2094

def invalidate_memoized_attributes
  @full_name = nil
  @cache_file = nil
end

#lib_files

Files in the ::Gem under one of the require_paths

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2112

def lib_files
  @files.select do |file|
    require_paths.any? do |path|
      file.start_with? path
    end
  end
end

#mark_version

Sets the rubygems_version to the current RubyGems version.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2150

def mark_version
  @rubygems_version = Gem::VERSION
end

#name_tuple

Return a NameTuple that represents this Specification

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2202

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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2185

def normalize
  if defined?(@extra_rdoc_files) and @extra_rdoc_files then
    @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

#reset_nil_attributes_to_default

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2991

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 = self.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
end

#ri_dir

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2331

def ri_dir
  @ri_dir ||= File.join base_dir, 'ri', full_name
end

#ruby_code(obj) (private)

Return a string containing a Ruby code representation of the given object.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2339

def ruby_code(obj)
  case obj
  when String            then obj.dump + ".freeze"
  when Array             then '[' + obj.map { |x| ruby_code x }.join(", ") + ']'
  when Hash              then
    seg = obj.keys.sort.map { |k| "#{k.to_s.dump} => #{obj[k].to_s.dump}" }
    "{ #{seg.join(', ')} }"
  when Gem::Version      then obj.to_s.dump
  when DateLike          then obj.strftime('%Y-%m-%d').dump
  when Time              then obj.strftime('%Y-%m-%d').dump
  when Numeric           then obj.inspect
  when true, false, nil  then obj.inspect
  when Gem::Platform     then "Gem::Platform.new(#{obj.to_a.inspect})"
  when Gem::Requirement  then
    list = obj.as_list
    "Gem::Requirement.new(#{ruby_code(list.size == 1 ? obj.to_s : list)})"
  else raise Gem::Exception, "ruby_code case not handled: #{obj.class}"
  end
end

#runtime_dependencies

List of dependencies that will automatically be activated at runtime.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2364

def runtime_dependencies
  dependencies.select(&:runtime?)
end

#same_attributes?(spec) ⇒ Boolean (private)

True if this gem has the same attributes as other.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2371

def same_attributes? spec
  @@attributes.all? { |name, default| self.send(name) == spec.send(name) }
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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1474

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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 1484

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 = string.to_s

  begin
    Builder::XChar.encode string
  rescue NameError, NoMethodError
    string.to_xs
  end
end

#satisfies_requirement?(dependency) ⇒ Boolean

Checks if this specification meets the requirement of dependency.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2380

def satisfies_requirement? dependency
  return @name == dependency.name &&
    dependency.requirement.satisfied_by?(@version)
end

#sort_obj

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2388

def sort_obj
  [@name, @version, @new_platform == Gem::Platform::RUBY ? -1 : 1]
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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2403

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2411

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"
[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2420

def spec_name
  "#{full_name}.gemspec"
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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2470

def to_ruby
  mark_version
  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? or platform == Gem::Platform::RUBY then
    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  and !.empty?
    result << "  s.metadata = #{ruby_code } 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,
    :
  ]

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

  if @installed_by_version then
    result << nil
    result << "  s.installed_by_version = \"#{Gem::VERSION}\" if s.respond_to? :installed_by_version"
  end

  unless dependencies.empty? then
    result << nil
    result << "  if s.respond_to? :specification_version then"
    result << "    s.specification_version = #{specification_version}"
    result << nil

    result << "    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then"

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

    result << "    else"

    dependencies.each do |dep|
      version_reqs_param = dep.requirements_list.inspect
      result << "      s.add_dependency(%q<#{dep.name}>.freeze, #{version_reqs_param})"
    end

    result << '    end'

    result << "  else"
    dependencies.each do |dep|
      version_reqs_param = dep.requirements_list.inspect
      result << "    s.add_dependency(%q<#{dep.name}>.freeze, #{version_reqs_param})"
    end
    result << "  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.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2563

def to_ruby_for_cache
  for_cache.to_ruby
end

#to_spec

Returns self

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2574

def to_spec
  self
end

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

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

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2611

def traverse trail = [], visited = {}, &block
  trail.push(self)
  begin
    dependencies.each do |dep|
      next unless dep.runtime?
      dep.to_specs.reverse_each do |dep_spec|
        next if visited.has_key?(dep_spec)
        visited[dep_spec] = true
        trail.push(dep_spec)
        begin
          result = block[self, dep, dep_spec, trail]
        ensure
          trail.pop
        end
        unless result == :next
          spec_name = dep_spec.name
          dep_spec.traverse(trail, visited, &block) unless
            trail.any? { |s| s.name == spec_name }
        end
      end
    end
  ensure
    trail.pop
  end
end

#validate(packaging = true)

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..

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2644

def validate packaging = true
  @warnings = 0
  require 'rubygems/user_interaction'
  extend Gem::UserInteraction
  normalize

  nil_attributes = self.class.non_nil_attributes.find_all do |attrname|
    instance_variable_get("@#{attrname}").nil?
  end

  unless nil_attributes.empty? then
    raise Gem::InvalidSpecificationException,
      "#{nil_attributes.join ', '} must not be nil"
  end

  if packaging and rubygems_version != Gem::VERSION then
    raise Gem::InvalidSpecificationException,
          "expected RubyGems version #{Gem::VERSION}, was #{rubygems_version}"
  end

  @@required_attributes.each do |symbol|
    unless self.send symbol then
      raise Gem::InvalidSpecificationException,
            "missing value for attribute #{symbol}"
    end
  end

  if !name.is_a?(String) then
    raise Gem::InvalidSpecificationException,
          "invalid value for attribute name: \"#{name.inspect}\" must be a string"
  elsif name !~ /[a-zA-Z]/ then
    raise Gem::InvalidSpecificationException,
          "invalid value for attribute name: #{name.dump} must include at least one letter"
  elsif name !~ VALID_NAME_PATTERN then
    raise Gem::InvalidSpecificationException,
          "invalid value for attribute name: #{name.dump} can only include letters, numbers, dashes, and underscores"
  end

  if raw_require_paths.empty? then
    raise Gem::InvalidSpecificationException,
          'specification must have at least one require_path'
  end

  @files.delete_if            { |x| File.directory?(x) && !File.symlink?(x) }
  @test_files.delete_if       { |x| File.directory?(x) && !File.symlink?(x) }
  @executables.delete_if      { |x| File.directory?(File.join(@bindir, x)) }
  @extra_rdoc_files.delete_if { |x| File.directory?(x) && !File.symlink?(x) }
  @extensions.delete_if       { |x| File.directory?(x) && !File.symlink?(x) }

  non_files = files.reject { |x| File.file?(x) || File.symlink?(x) }

  unless not packaging or non_files.empty? then
    raise Gem::InvalidSpecificationException,
          "[\"#{non_files.join "\", \""}\"] are not files"
  end

  if files.include? file_name then
    raise Gem::InvalidSpecificationException,
          "#{full_name} contains itself (#{file_name}), check your files list"
  end

  unless specification_version.is_a?(Fixnum)
    raise Gem::InvalidSpecificationException,
          'specification_version must be a Fixnum (did you mean version?)'
  end

  case platform
  when Gem::Platform, Gem::Platform::RUBY then # ok
  else
    raise Gem::InvalidSpecificationException,
          "invalid platform #{platform.inspect}, see Gem::Platform"
  end

  self.class.array_attributes.each do |field|
    val = self.send field
    klass = case field
            when :dependencies
              Gem::Dependency
            else
              String
            end

    unless Array === val and val.all? { |x| x.kind_of?(klass) } then
      raise(Gem::InvalidSpecificationException,
            "#{field} must be an Array of #{klass}")
    end
  end

  [:authors].each do |field|
    val = self.send field
    raise Gem::InvalidSpecificationException, "#{field} may not be empty" if
      val.empty?
  end

  unless Hash === 
    raise Gem::InvalidSpecificationException,
            'metadata must be a hash'
  end

  .keys.each do |k|
    if !k.kind_of?(String)
      raise Gem::InvalidSpecificationException,
              'metadata keys must be a String'
    end

    if k.size > 128
      raise Gem::InvalidSpecificationException,
              "metadata key too large (#{k.size} > 128)"
    end
  end

  .values.each do |k|
    if !k.kind_of?(String)
      raise Gem::InvalidSpecificationException,
              'metadata values must be a String'
    end

    if k.size > 1024
      raise Gem::InvalidSpecificationException,
              "metadata value too large (#{k.size} > 1024)"
    end
  end

  licenses.each { |license|
    if license.length > 64
      raise Gem::InvalidSpecificationException,
        "each license must be 64 characters or less"
    end

    if !Gem::Licenses.match?(license)
      suggestions = Gem::Licenses.suggestions(license)
      message = <<-warning
license value '#{license}' is invalid.  Use a license identifier from
http://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard license.
      warning
      message += "Did you mean #{suggestions.map { |s| "'#{s}'"}.join(', ')}?\n" unless suggestions.nil?
      warning(message)
    end
  }

  warning <<-warning if licenses.empty?
licenses is empty, but is recommended.  Use a license identifier from
http://spdx.org/licenses or '#{Gem::Licenses::NONSTANDARD}' for a nonstandard license.
  warning

  validate_permissions

  # reject lazy developers:

  lazy = '"FIxxxXME" or "TOxxxDO"'.gsub(/xxx/, '')

  unless authors.grep(/FI XME|TO DO/x).empty? then
    raise Gem::InvalidSpecificationException, "#{lazy} is not an author"
  end

  unless Array(email).grep(/FI XME|TO DO/x).empty? then
    raise Gem::InvalidSpecificationException, "#{lazy} is not an email"
  end

  if description =~ /FI XME|TO DO/x then
    raise Gem::InvalidSpecificationException, "#{lazy} is not a description"
  end

  if summary =~ /FI XME|TO DO/x then
    raise Gem::InvalidSpecificationException, "#{lazy} is not a summary"
  end

  # Make sure a homepage is valid HTTP/HTTPS URI
  if homepage and not homepage.empty?
    begin
      homepage_uri = URI.parse(homepage)
      unless [URI::HTTP, URI::HTTPS].member? homepage_uri.class
        raise Gem::InvalidSpecificationException, "\"#{homepage}\" is not a valid HTTP URI"
      end
    rescue URI::InvalidURIError
      raise Gem::InvalidSpecificationException, "\"#{homepage}\" is not a valid HTTP URI"
    end
  end

  # Warnings

  %w[author email homepage summary].each do |attribute|
    value = self.send attribute
    warning "no #{attribute} specified" if value.nil? or value.empty?
  end

  if description == summary then
    warning 'description and summary are identical'
  end

  # TODO: raise at some given date
  warning "deprecated autorequire specified" if autorequire

  executables.each do |executable|
    executable_path = File.join(bindir, executable)
    shebang = File.read(executable_path, 2) == '#!'

    warning "#{executable_path} is missing #! line" unless shebang
  end

  files.each do |file|
    next unless File.symlink?(file)
    warning "#{file} is a symlink, which is not supported on all platforms"
  end

  validate_dependencies

  true
ensure
  if $! or @warnings > 0 then
    alert_warning "See http://guides.rubygems.org/specification-reference/ for help"
  end
end

#validate_permissions

Checks to see if the files to be packaged are world-readable.

[ GitHub ]

  
# File 'lib/rubygems/specification.rb', line 2939

def validate_permissions
  return if Gem.win_platform?

  files.each do |file|
    next unless File.file?(file)
    next if File.stat(file).mode & 0444 == 0444
    warning "#{file} is not world-readable"
  end

  executables.each do |name|
    exec = File.join @bindir, name
    next unless File.file?(exec)
    next if File.stat(exec).executable?
    warning "#{exec} is not executable"
  end
end