Class Gem::Specification < Object

# File ../ruby/lib/rubygems/specification.rb, line 649
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 :@loaded,                    false
  spec.instance_variable_set :@activated,                 false

  spec
end

# File ../ruby/lib/rubygems/specification.rb, line 295
def self.add_spec spec
  # 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
  _resort!
end

# File ../ruby/lib/rubygems/specification.rb, line 315
def self.add_specs *specs
  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!

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

# File ../ruby/lib/rubygems/specification.rb, line 331
def self.all
  warn "NOTE: Specification.all called from #{caller.first}" unless
    Gem::Deprecate.skip
  _all
end

# File ../ruby/lib/rubygems/specification.rb, line 349
def self.all= specs
  @@all = specs
end

# File ../ruby/lib/rubygems/specification.rb, line 356
def self.all_names
  self._all.map(&:full_name)
end

# File ../ruby/lib/rubygems/specification.rb, line 365
def self.array_attributes
  @@array_attributes.dup
end

# File ../ruby/lib/rubygems/specification.rb, line 374
def self.attribute_names
  @@attributes.dup
end

# File ../ruby/lib/rubygems/specification.rb, line 381
def self.dirs
  @@dirs ||= Gem.path.collect { |dir|
    File.join dir, "specifications"
  }
end

# File ../ruby/lib/rubygems/specification.rb, line 391
def self.dirs= dirs
  # TODO: find extra calls to dir=
  # warn "NOTE: dirs= called from #{caller.first} for #{dirs.inspect}"

  self.reset

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

# File ../ruby/lib/rubygems/specification.rb, line 407
def self.each
  return enum_for(:each) unless block_given?

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

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

# File ../ruby/lib/rubygems/specification.rb, line 430
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

# File ../ruby/lib/rubygems/specification.rb, line 441
def self.find_by_path path
  self.find { |spec|
    spec.contains_requirable_file? path
  }
end

# File ../ruby/lib/rubygems/specification.rb, line 450
def self.find_in_unresolved path
  # TODO: do we need these?? Kill it
  specs = Gem.unresolved_deps.values.map { |dep| dep.to_specs }.flatten

  specs.find_all { |spec| spec.contains_requirable_file? path }
end

# File ../ruby/lib/rubygems/specification.rb, line 461
def self.find_in_unresolved_tree path
  specs = Gem.unresolved_deps.values.map { |dep| dep.to_specs }.flatten

  specs.reverse_each do |spec|
    trails = []
    spec.traverse do |from_spec, dep, to_spec, trail|
      next unless to_spec.conflicts.empty?
      trails << trail if to_spec.contains_requirable_file? path
    end

    next if trails.empty?

    return trails.map(&:reverse).sort.first.reverse
  end

  []
end

# File ../ruby/lib/rubygems/specification.rb, line 487
def self.from_yaml(input)
  Gem.load_yaml

  input = normalize_yaml_input input
  spec = YAML.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

  unless (spec.instance_variables.include? '@specification_version' or
          spec.instance_variables.include? :@specification_version) and
         spec.instance_variable_get :@specification_version
    spec.instance_variable_set :@specification_version,
                               NONEXISTENT_SPECIFICATION_VERSION
  end

  spec
end

# File ../ruby/lib/rubygems/specification.rb, line 515
def self.latest_specs prerelease = false
  result = Hash.new { |h,k| h[k] = {} }
  native = {}

  Gem::Specification._all.reverse_each do |spec|
    next if spec.version.prerelease? unless prerelease

    native[spec.name] = spec.version if spec.platform == Gem::Platform::RUBY
    result[spec.name][spec.platform] = spec
  end

  result.map(&:last).map(&:values).flatten.reject { |spec|
    minimum = native[spec.name]
    minimum && spec.version < minimum
  }
end

# File ../ruby/lib/rubygems/specification.rb, line 535
def self.load file
  return unless file && File.file?(file)

  file = file.dup.untaint

  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.to_s
      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

# File ../ruby/lib/rubygems/specification.rb, line 1343
def initialize name = nil, version = nil
  @loaded = false
  @activated = false
  @loaded_from = nil
  @original_platform = nil

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

  @@non_nil_attributes.each do |key|
    default = default_value(key)
    value = case default
            when Time, Numeric, Symbol, true, false, nil then default
            else default.dup
            end

    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

# File ../ruby/lib/rubygems/specification.rb, line 569
def self.non_nil_attributes
  @@non_nil_attributes.dup
end

# File ../ruby/lib/rubygems/specification.rb, line 576
def self.normalize_yaml_input(input)
  result = input.respond_to?(:read) ? input.read : input
  result = "--- " + result unless result =~ /\A--- /
  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

# File ../ruby/lib/rubygems/specification.rb, line 590
def self.outdated
  outdateds = []

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

  latest_specs.each do |local|
    dependency = Gem::Dependency.new local.name, ">= #{local.version}"
    remotes    = fetcher.find_matching dependency
    remotes    = remotes.map { |(_, version, _), _| version }
    latest     = remotes.sort.last

    outdateds << local.name if latest and local.version < latest
  end

  outdateds
end

# File ../ruby/lib/rubygems/specification.rb, line 611
def self.remove_spec spec
  # TODO: beat on the tests
  raise "wtf: #{spec.full_name} not in #{all_names.inspect}" unless
    _all.include? spec
  _all.delete spec
end

# File ../ruby/lib/rubygems/specification.rb, line 621
def self.required_attribute?(name)
  @@required_attributes.include? name.to_sym
end

# File ../ruby/lib/rubygems/specification.rb, line 628
def self.required_attributes
  @@required_attributes.dup
end

# File ../ruby/lib/rubygems/specification.rb, line 636
def self.reset
  @@dirs = nil
  # from = caller.first(10).reject { |s| s =~ /minitest/ }
  # warn ""
  # warn "NOTE: Specification.reset from #{from.inspect}"
  Gem.pre_reset_hooks.each  { |hook| hook.call }
  @@all = nil
  Gem.post_reset_hooks.each { |hook| hook.call }
end

# File ../ruby/lib/rubygems/specification.rb, line 716
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
  ]
end

# File ../ruby/lib/rubygems/specification.rb, line 745
def activate
  raise_if_conflicts

  return false if Gem.loaded_specs[self.name]

  activate_dependencies
  add_self_to_load_path

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

  return true
end

# File ../ruby/lib/rubygems/specification.rb, line 765
def activate_dependencies
  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
      Gem.unresolved_deps[name] = Gem.unresolved_deps[name].merge spec_dep
    end
  end

  Gem.unresolved_deps.delete self.name
end

# File ../ruby/lib/rubygems/specification.rb, line 794
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

# File ../ruby/lib/rubygems/specification.rb, line 838
def add_development_dependency(gem, *requirements)
  add_dependency_with_type(gem, :development, *requirements)
end

# File ../ruby/lib/rubygems/specification.rb, line 848
def add_runtime_dependency(gem, *requirements)
  add_dependency_with_type(gem, :runtime, *requirements)
end

# File ../ruby/lib/rubygems/specification.rb, line 857
def add_self_to_load_path
  paths = require_paths.map do |path|
    File.join full_gem_path, path
  end

  # 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

# File ../ruby/lib/rubygems/specification.rb, line 877
def author
  val = authors and val.first
end

# File ../ruby/lib/rubygems/specification.rb, line 884
def author= o
  self.authors = [o]
end

# File ../ruby/lib/rubygems/specification.rb, line 898
def authors
  @authors ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 905
def authors= value
  @authors = Array(value).flatten.grep(String)
end

# File ../ruby/lib/rubygems/specification.rb, line 914
def base_dir
  return Gem.dir unless loaded_from
  @base_dir ||= File.dirname File.dirname loaded_from
end

# File ../ruby/lib/rubygems/specification.rb, line 925
def bin_dir
  @bin_dir ||= File.join gem_dir, bindir # TODO: this is unfortunate
end

# File ../ruby/lib/rubygems/specification.rb, line 932
def bin_file name
  File.join bin_dir, name
end

# File ../ruby/lib/rubygems/specification.rb, line 940
def cache_dir
  @cache_dir ||= File.join base_dir, "cache"
end

# File ../ruby/lib/rubygems/specification.rb, line 947
def cache_file
  @cache_file ||= File.join cache_dir, "#{full_name}.gem"
end

# File ../ruby/lib/rubygems/specification.rb, line 956
def conflicts
  conflicts = {}
  Gem.loaded_specs.values.each do |spec|
    bad = self.runtime_dependencies.find_all { |dep|
      spec.name == dep.name and not spec.satisfies_requirement? dep
    }

    conflicts[spec] = bad unless bad.empty?
  end
  conflicts
end

# File ../ruby/lib/rubygems/specification.rb, line 971
def contains_requirable_file? file
  root = full_gem_path

  require_paths.each do |lib|
    base = "#{root}/#{lib}/#{file}"
    Gem.suffixes.each do |suf|
      path = "#{base}#{suf}"
      return true if File.file? path
    end
  end

  return false
end

# File ../ruby/lib/rubygems/specification.rb, line 988
def date
  @date ||= TODAY
end

# File ../ruby/lib/rubygems/specification.rb, line 997
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 /\A(\d{4})-(\d{2})-(\d{2})\Z/ =~ 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, Date then
            Time.utc(date.year, date.month, date.day)
          else
            TODAY
          end
end

# File ../ruby/lib/rubygems/specification.rb, line 1028
def default_executable
  if defined?(@default_executable) and @default_executable
    result = @default_executable
  elsif @executables and @executables.size == 1
    result = Array(@executables).first
  else
    result = nil
  end
  result
end

# File ../ruby/lib/rubygems/specification.rb, line 1042
def default_value name
  @@default_value[name]
end

# File ../ruby/lib/rubygems/specification.rb, line 1052
def dependencies
  @dependencies ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1062
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

# File ../ruby/lib/rubygems/specification.rb, line 1081
def dependent_specs
  runtime_dependencies.map { |dep| dep.to_specs }.flatten
end

# File ../ruby/lib/rubygems/specification.rb, line 1088
def description= str
  @description = str.to_s
end

# File ../ruby/lib/rubygems/specification.rb, line 1095
def development_dependencies
  dependencies.select { |d| d.type == :development }
end

# File ../ruby/lib/rubygems/specification.rb, line 1102
def doc_dir
  @doc_dir ||= File.join base_dir, 'doc', full_name
end

# File ../ruby/lib/rubygems/specification.rb, line 1134
def executable
  val = executables and val.first
end

# File ../ruby/lib/rubygems/specification.rb, line 1141
def executable=o
  self.executables = [o]
end

# File ../ruby/lib/rubygems/specification.rb, line 1148
def executables
  @executables ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1156
def executables= value
  # TODO: warn about setting instead of pushing
  @executables = Array(value)
end

# File ../ruby/lib/rubygems/specification.rb, line 1165
def extensions
  @extensions ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1173
def extensions= extensions
  # TODO: warn about setting instead of pushing
  @extensions = Array extensions
end

# File ../ruby/lib/rubygems/specification.rb, line 1181
def extra_rdoc_files
  @extra_rdoc_files ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1189
def extra_rdoc_files= files
  # TODO: warn about setting instead of pushing
  @extra_rdoc_files = Array files
end

# File ../ruby/lib/rubygems/specification.rb, line 1199
def file_name
  "#{full_name}.gem"
end

# File ../ruby/lib/rubygems/specification.rb, line 1212
def files
  # DO NOT CHANGE TO ||= ! This is not a normal accessor. (yes, it sucks)
  @files = [@files,
            @test_files,
            add_bindir(@executables),
            @extra_rdoc_files,
            @extensions,
           ].flatten.uniq.compact
end

# File ../ruby/lib/rubygems/specification.rb, line 1225
def files= files
  @files = Array files
end

# File ../ruby/lib/rubygems/specification.rb, line 1243
def for_cache
  spec = dup

  spec.files = nil
  spec.test_files = nil

  spec
end

# File ../ruby/lib/rubygems/specification.rb, line 1255
def full_gem_path
  # TODO: try to get rid of this... or the awkward
  # TODO: also, shouldn't it default to full_name if it hasn't been written?
  return @full_gem_path if defined?(@full_gem_path) && @full_gem_path

  @full_gem_path = File.expand_path File.join(gems_dir, full_name)

  return @full_gem_path if File.directory? @full_gem_path

  @full_gem_path = File.expand_path File.join(gems_dir, original_name)
end

# File ../ruby/lib/rubygems/specification.rb, line 1272
def full_name
  if platform == Gem::Platform::RUBY or platform.nil? then
    "#{@name}-#{@version}"
  else
    "#{@name}-#{@version}-#{platform}"
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1284
def gem_dir
  @gem_dir ||= File.expand_path File.join(gems_dir, full_name)
end

# File ../ruby/lib/rubygems/specification.rb, line 1292
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

# File ../ruby/lib/rubygems/specification.rb, line 1302
def has_rdoc
  true
end

# File ../ruby/lib/rubygems/specification.rb, line 1311
def has_rdoc= ignored
  @has_rdoc = true
end

# File ../ruby/lib/rubygems/specification.rb, line 1320
def has_unit_tests?
  not test_files.empty?
end

# File ../ruby/lib/rubygems/specification.rb, line 1374
def initialize_copy other_spec
  other_ivars = other_spec.instance_variables
  other_ivars = other_ivars.map { |ivar| ivar.intern } if # for 1.9
    String === other_ivars.first

  self.class.array_attributes.each do |name|
    name = :"@#{name}"
    next unless other_ivars.include? 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

# File ../ruby/lib/rubygems/specification.rb, line 1404
def installation_path
  loaded_from && base_dir
end

# File ../ruby/lib/rubygems/specification.rb, line 1412
def lib_dirs_glob
  dirs = if self.require_paths.size > 1 then
           "{#{self.require_paths.join(',')}}"
         else
           self.require_paths.first
         end

  "#{self.full_gem_path}/#{dirs}"
end

# File ../ruby/lib/rubygems/specification.rb, line 1425
def lib_files
  @files.select do |file|
    require_paths.any? do |path|
      file.index(path) == 0
    end
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1436
def license
  val = licenses and val.first
end

# File ../ruby/lib/rubygems/specification.rb, line 1443
def license=o
  self.licenses = [o]
end

# File ../ruby/lib/rubygems/specification.rb, line 1451
def licenses
  @licenses ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1458
def licenses= licenses
  @licenses = Array licenses
end

# File ../ruby/lib/rubygems/specification.rb, line 1466
def loaded_from= path
  @loaded_from = path.to_s
end

# File ../ruby/lib/rubygems/specification.rb, line 1473
def mark_version
  @rubygems_version = Gem::VERSION
end

# File ../ruby/lib/rubygems/specification.rb, line 1480
def matches_for_glob glob # TODO: rename?
  # TODO: do we need these?? Kill it
  glob = File.join(self.lib_dirs_glob, glob)

  Dir[glob].map { |f| f.untaint } # FIX our tests are broken, run w/ SAFE=1
end

# File ../ruby/lib/rubygems/specification.rb, line 1505
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

# File ../ruby/lib/rubygems/specification.rb, line 1541
def platform
  @new_platform ||= Gem::Platform::RUBY
end

# File ../ruby/lib/rubygems/specification.rb, line 1551
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

  @new_platform
end

# File ../ruby/lib/rubygems/specification.rb, line 1612
def raise_if_conflicts
  other = Gem.loaded_specs[self.name]

  if other and self.version != other.version then
    # This gem is already loaded.  If the currently loaded gem is not in the
    # list of candidate gems, then we have a version conflict.

    msg = "can't activate #{full_name}, already activated #{other.full_name}"

    e = Gem::LoadError.new msg
    e.name = self.name
    # TODO: e.requirement = dep.requirement

    raise e
  end

  conf = self.conflicts

  unless conf.empty? then
    y = conf.map { |act,con|
      "#{act.full_name} conflicts with #{con.join(", ")}"
    }.join ", "

    # TODO: improve message by saying who activated `con`

    raise Gem::LoadError, "Unable to activate #{self.full_name}, because #{y}"
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1644
def rdoc_options
  @rdoc_options ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1652
def rdoc_options= options
  # TODO: warn about setting instead of pushing
  @rdoc_options = Array options
end

# File ../ruby/lib/rubygems/specification.rb, line 1660
def require_path
  val = require_paths and val.first
end

# File ../ruby/lib/rubygems/specification.rb, line 1667
def require_path= path
  self.require_paths = [path]
end

# File ../ruby/lib/rubygems/specification.rb, line 1674
def required_ruby_version= req
  @required_ruby_version = Gem::Requirement.create req
end

# File ../ruby/lib/rubygems/specification.rb, line 1681
def required_rubygems_version= req
  @required_rubygems_version = Gem::Requirement.create req
end

# File ../ruby/lib/rubygems/specification.rb, line 1689
def requirements
  @requirements ||= []
end

# File ../ruby/lib/rubygems/specification.rb, line 1697
def requirements= req
  # TODO: warn about setting instead of pushing
  @requirements = Array req
end

# File ../ruby/lib/rubygems/specification.rb, line 1705
def ri_dir
  @ri_dir ||= File.join base_dir, 'ri', full_name
end

# File ../ruby/lib/rubygems/specification.rb, line 1733
def runtime_dependencies
  dependencies.select { |d| d.type == :runtime }
end

# File ../ruby/lib/rubygems/specification.rb, line 1749
def satisfies_requirement? dependency
  return @name == dependency.name &&
    dependency.requirement.satisfied_by?(@version)
end

# File ../ruby/lib/rubygems/specification.rb, line 1757
def sort_obj
  # TODO: this is horrible. Deprecate it.
  [@name, @version, @new_platform == Gem::Platform::RUBY ? -1 : 1]
end

# File ../ruby/lib/rubygems/specification.rb, line 1766
def spec_dir
  @spec_dir ||= File.join base_dir, "specifications"
end

# File ../ruby/lib/rubygems/specification.rb, line 1774
def spec_file
  @spec_file ||= File.join spec_dir, "#{full_name}.gemspec"
end

# File ../ruby/lib/rubygems/specification.rb, line 1783
def spec_name
  "#{full_name}.gemspec"
end

# File ../ruby/lib/rubygems/specification.rb, line 1790
def summary= str
  @summary = str.to_s.strip.
    gsub(/(\w-)\n[ \t]*(\w)/, '\1\2').gsub(/\n[ \t]*/, " ") # so. weird.
end

# File ../ruby/lib/rubygems/specification.rb, line 1798
def test_file
  val = test_files and val.first
end

# File ../ruby/lib/rubygems/specification.rb, line 1805
def test_file= file
  self.test_files = [file]
end

# File ../ruby/lib/rubygems/specification.rb, line 1813
def test_files
  # Handle the possibility that we have @test_suite_file but not
  # @test_files.  This will happen when an old gem is loaded via
  # YAML.
  if defined? @test_suite_file then
    @test_files = [@test_suite_file].flatten
    @test_suite_file = nil
  end
  if defined?(@test_files) and @test_files then
    @test_files
  else
    @test_files = []
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1831
def test_files= files
  @test_files = Array files
end

# File ../ruby/lib/rubygems/specification.rb, line 1851
def to_ruby
  mark_version
  result = []
  result << "# -*- encoding: utf-8 -*-"
  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="

  handled = [
    :dependencies,
    :name,
    :platform,
    :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

  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}>, #{req})"
  end

  result << "    else"

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

  result << "end"
  result << nil

  result.join "\n"
end

# File ../ruby/lib/rubygems/specification.rb, line 1927
def to_ruby_for_cache
  for_cache.to_ruby
end

# File ../ruby/lib/rubygems/specification.rb, line 1966
def traverse trail = [], &block
  trail = trail + [self]
  runtime_dependencies.each do |dep|
    dep.to_specs.each do |dep_spec|
      block[self, dep, dep_spec, trail + [dep_spec]]
      dep_spec.traverse(trail, &block) unless
        trail.map(&:name).include? dep_spec.name
    end
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1984
def validate packaging = true
  require 'rubygems/user_interaction'
  extend Gem::UserInteraction
  normalize

  nil_attributes = self.class.non_nil_attributes.find_all do |name|
    instance_variable_get("@#{name}").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

  unless String === name then
    raise Gem::InvalidSpecificationException,
          "invalid value for attribute name: \"#{name.inspect}\""
  end

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

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

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

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

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

  # 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

  if homepage and not homepage.empty? and
     homepage !~ /\A[a-z][a-z\d+.-]*:/i then
    raise Gem::InvalidSpecificationException,
          "\"#{homepage}\" is not a URI"
  end

  # Warnings

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

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

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

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

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

  true
end

# File ../ruby/lib/rubygems/specification.rb, line 2128
def version= version
  @version = Gem::Version.create(version)
  self.required_rubygems_version = '> 1.3.1' if @version.prerelease?
  return @version
end

# File ../ruby/lib/rubygems/specification.rb, line 811
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?(:version_requirements)

    dependency = Gem::Dependency.new(dependency, requirements, type)
  end

  dependencies << dependency
end

# File ../ruby/lib/rubygems/specification.rb, line 1232
def find_all_satisfiers dep
  Gem::Specification.each do |spec|
    yield spec if spec.satisfies_requirement? dep
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1713
def ruby_code(obj)
  case obj
  when String            then obj.dump
  when Array             then '[' + obj.map { |x| ruby_code x }.join(", ") + ']'
  when Gem::Version      then obj.to_s.dump
  when Date              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 "Gem::Requirement.new(#{obj.to_s.inspect})"
  else raise Gem::Exception, "ruby_code case not handled: #{obj.class}"
  end
end

# File ../ruby/lib/rubygems/specification.rb, line 1740
def same_attributes? spec
  @@attributes.all? { |name, default| self.send(name) == spec.send(name) }
end