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 (=, !=, >, <, >=, <=, ~>) 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 [op, version] pair. +obj+ can # be a String or a Gem::Version. # # If +obj+ is a String, it can be either a full requirement # specification, like ">= 1.2", or a simple version number, # like "1.2". # # 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 ">= 0". 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