add tag v2_2_9

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v2_2_9@61257 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 273 insertions, 0 deletions

diff --git a/ruby_2_2/lib/rubygems/requirement.rb b/ruby_2_2/lib/rubygems/requirement.rb
new file mode 100644
index 0000000000..8b6a81612c
--- /dev/null
+++ b/ruby_2_2/lib/rubygems/requirement.rb
@@ -0,0 +1,273 @@
+require "rubygems/version"
+require "rubygems/deprecate"
+
+# If we're being loaded after yaml was already required, then
+# load our yaml + workarounds now.
+Gem.load_yaml if defined? ::YAML
+
+##
+# A Requirement is a set of one or more version restrictions. It supports a
+# few (<tt>=, !=, >, <, >=, <=, ~></tt>) different restriction operators.
+#
+# See Gem::Version for a description on how versions and requirements work
+# together in RubyGems.
+
+class Gem::Requirement
+  OPS = { #:nodoc:
+    "="  =>  lambda { |v, r| v == r },
+    "!=" =>  lambda { |v, r| v != r },
+    ">"  =>  lambda { |v, r| v >  r },
+    "<"  =>  lambda { |v, r| v <  r },
+    ">=" =>  lambda { |v, r| v >= r },
+    "<=" =>  lambda { |v, r| v <= r },
+    "~>" =>  lambda { |v, r| v >= r && v.release < r.bump }
+  }
+
+  quoted  = OPS.keys.map { |k| Regexp.quote k }.join "|"
+  PATTERN_RAW = "\\s*(#{quoted})?\\s*(#{Gem::Version::VERSION_PATTERN})\\s*" # :nodoc:
+
+  ##
+  # A regular expression that matches a requirement
+
+  PATTERN = /\A#{PATTERN_RAW}\z/
+
+  ##
+  # The default requirement matches any version
+
+  DefaultRequirement = [">=", Gem::Version.new(0)]
+
+  ##
+  # Raised when a bad requirement is encountered
+
+  class BadRequirementError < ArgumentError; end
+
+  ##
+  # Factory method to create a Gem::Requirement object.  Input may be
+  # a Version, a String, or nil.  Intended to simplify client code.
+  #
+  # If the input is "weird", the default version requirement is
+  # returned.
+
+  def self.create input
+    case input
+    when Gem::Requirement then
+      input
+    when Gem::Version, Array then
+      new input
+    else
+      if input.respond_to? :to_str then
+        new [input.to_str]
+      else
+        default
+      end
+    end
+  end
+
+  ##
+  # A default "version requirement" can surely _only_ be '>= 0'.
+
+  def self.default
+    new '>= 0'
+  end
+
+  ##
+  # Parse +obj+, returning an <tt>[op, version]</tt> pair. +obj+ can
+  # be a String or a Gem::Version.
+  #
+  # If +obj+ is a String, it can be either a full requirement
+  # specification, like <tt>">= 1.2"</tt>, or a simple version number,
+  # like <tt>"1.2"</tt>.
+  #
+  #     parse("> 1.0")                 # => [">", "1.0"]
+  #     parse("1.0")                   # => ["=", "1.0"]
+  #     parse(Gem::Version.new("1.0")) # => ["=,  "1.0"]
+
+  def self.parse obj
+    return ["=", obj] if Gem::Version === obj
+
+    unless PATTERN =~ obj.to_s
+      raise BadRequirementError, "Illformed requirement [#{obj.inspect}]"
+    end
+
+    if $1 == ">=" && $2 == "0"
+      DefaultRequirement
+    else
+      [$1 || "=", Gem::Version.new($2)]
+    end
+  end
+
+  ##
+  # An array of requirement pairs. The first element of the pair is
+  # the op, and the second is the Gem::Version.
+
+  attr_reader :requirements #:nodoc:
+
+  ##
+  # Constructs a requirement from +requirements+. Requirements can be
+  # Strings, Gem::Versions, or Arrays of those. +nil+ and duplicate
+  # requirements are ignored. An empty set of +requirements+ is the
+  # same as <tt>">= 0"</tt>.
+
+  def initialize *requirements
+    requirements = requirements.flatten
+    requirements.compact!
+    requirements.uniq!
+
+    if requirements.empty?
+      @requirements = [DefaultRequirement]
+    else
+      @requirements = requirements.map! { |r| self.class.parse r }
+    end
+  end
+
+  ##
+  # Concatenates the +new+ requirements onto this requirement.
+
+  def concat new
+    new = new.flatten
+    new.compact!
+    new.uniq!
+    new = new.map { |r| self.class.parse r }
+
+    @requirements.concat new
+  end
+
+  ##
+  # Formats this requirement for use in a Gem::RequestSet::Lockfile.
+
+  def for_lockfile # :nodoc:
+    return if [DefaultRequirement] == @requirements
+
+    list = requirements.sort_by { |_, version|
+      version
+    }.map { |op, version|
+      "#{op} #{version}"
+    }.uniq
+
+    " (#{list.join ', '})"
+  end
+
+  ##
+  # true if this gem has no requirements.
+
+  def none?
+    if @requirements.size == 1
+      @requirements[0] == DefaultRequirement
+    else
+      false
+    end
+  end
+
+  ##
+  # true if the requirement is for only an exact version
+
+  def exact?
+    return false unless @requirements.size == 1
+    @requirements[0][0] == "="
+  end
+
+  def as_list # :nodoc:
+    requirements.map { |op, version| "#{op} #{version}" }.sort
+  end
+
+  def hash # :nodoc:
+    requirements.hash
+  end
+
+  def marshal_dump # :nodoc:
+    fix_syck_default_key_in_requirements
+
+    [@requirements]
+  end
+
+  def marshal_load array # :nodoc:
+    @requirements = array[0]
+
+    fix_syck_default_key_in_requirements
+  end
+
+  def yaml_initialize(tag, vals) # :nodoc:
+    vals.each do |ivar, val|
+      instance_variable_set "@#{ivar}", val
+    end
+
+    Gem.load_yaml
+    fix_syck_default_key_in_requirements
+  end
+
+  def init_with coder # :nodoc:
+    yaml_initialize coder.tag, coder.map
+  end
+
+  def to_yaml_properties # :nodoc:
+    ["@requirements"]
+  end
+
+  def encode_with coder # :nodoc:
+    coder.add 'requirements', @requirements
+  end
+
+  ##
+  # A requirement is a prerelease if any of the versions inside of it
+  # are prereleases
+
+  def prerelease?
+    requirements.any? { |r| r.last.prerelease? }
+  end
+
+  def pretty_print q # :nodoc:
+    q.group 1, 'Gem::Requirement.new(', ')' do
+      q.pp as_list
+    end
+  end
+
+  ##
+  # True if +version+ satisfies this Requirement.
+
+  def satisfied_by? version
+    raise ArgumentError, "Need a Gem::Version: #{version.inspect}" unless
+      Gem::Version === version
+    # #28965: syck has a bug with unquoted '=' YAML.loading as YAML::DefaultKey
+    requirements.all? { |op, rv| (OPS[op] || OPS["="]).call version, rv }
+  end
+
+  alias :=== :satisfied_by?
+  alias :=~ :satisfied_by?
+
+  ##
+  # True if the requirement will not always match the latest version.
+
+  def specific?
+    return true if @requirements.length > 1 # GIGO, > 1, > 2 is silly
+
+    not %w[> >=].include? @requirements.first.first # grab the operator
+  end
+
+  def to_s # :nodoc:
+    as_list.join ", "
+  end
+
+  def == other # :nodoc:
+    Gem::Requirement === other and to_s == other.to_s
+  end
+
+  private
+
+  def fix_syck_default_key_in_requirements # :nodoc:
+    Gem.load_yaml
+
+    # Fixup the Syck DefaultKey bug
+    @requirements.each do |r|
+      if r[0].kind_of? Gem::SyckDefaultKey
+        r[0] = "="
+      end
+    end
+  end
+end
+
+class Gem::Version
+  # This is needed for compatibility with older yaml
+  # gemspecs.
+
+  Requirement = Gem::Requirement # :nodoc:
+end