mirror of
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293 lines
6.9 KiB
Ruby
293 lines
6.9 KiB
Ruby
# frozen_string_literal: true
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require_relative "version"
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##
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# A Requirement is a set of one or more version restrictions. It supports a
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# few (<tt>=, !=, >, <, >=, <=, ~></tt>) different restriction operators.
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#
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# See Gem::Version for a description on how versions and requirements work
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# together in RubyGems.
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class Gem::Requirement
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OPS = { #:nodoc:
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"=" => lambda {|v, r| v == r },
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"!=" => lambda {|v, r| v != r },
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">" => lambda {|v, r| v > r },
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"<" => lambda {|v, r| v < r },
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">=" => lambda {|v, r| v >= r },
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"<=" => lambda {|v, r| v <= r },
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"~>" => lambda {|v, r| v >= r && v.release < r.bump },
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}.freeze
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SOURCE_SET_REQUIREMENT = Struct.new(:for_lockfile).new "!" # :nodoc:
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quoted = OPS.keys.map {|k| Regexp.quote k }.join "|"
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PATTERN_RAW = "\\s*(#{quoted})?\\s*(#{Gem::Version::VERSION_PATTERN})\\s*".freeze # :nodoc:
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##
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# A regular expression that matches a requirement
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PATTERN = /\A#{PATTERN_RAW}\z/.freeze
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##
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# The default requirement matches any non-prerelease version
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DefaultRequirement = [">=", Gem::Version.new(0)].freeze
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##
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# The default requirement matches any version
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DefaultPrereleaseRequirement = [">=", Gem::Version.new("0.a")].freeze
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##
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# Raised when a bad requirement is encountered
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class BadRequirementError < ArgumentError; end
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##
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# Factory method to create a Gem::Requirement object. Input may be
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# a Version, a String, or nil. Intended to simplify client code.
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#
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# If the input is "weird", the default version requirement is
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# returned.
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def self.create(*inputs)
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return new inputs if inputs.length > 1
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input = inputs.shift
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case input
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when Gem::Requirement then
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input
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when Gem::Version, Array then
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new input
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when '!' then
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source_set
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else
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if input.respond_to? :to_str
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new [input.to_str]
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else
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default
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end
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end
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end
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def self.default
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new '>= 0'
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end
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def self.default_prerelease
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new '>= 0.a'
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end
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###
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# A source set requirement, used for Gemfiles and lockfiles
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def self.source_set # :nodoc:
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SOURCE_SET_REQUIREMENT
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end
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##
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# Parse +obj+, returning an <tt>[op, version]</tt> pair. +obj+ can
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# be a String or a Gem::Version.
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#
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# If +obj+ is a String, it can be either a full requirement
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# specification, like <tt>">= 1.2"</tt>, or a simple version number,
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# like <tt>"1.2"</tt>.
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#
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# parse("> 1.0") # => [">", Gem::Version.new("1.0")]
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# parse("1.0") # => ["=", Gem::Version.new("1.0")]
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# parse(Gem::Version.new("1.0")) # => ["=, Gem::Version.new("1.0")]
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def self.parse(obj)
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return ["=", obj] if Gem::Version === obj
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unless PATTERN =~ obj.to_s
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raise BadRequirementError, "Illformed requirement [#{obj.inspect}]"
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end
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if $1 == ">=" && $2 == "0"
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DefaultRequirement
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elsif $1 == ">=" && $2 == "0.a"
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DefaultPrereleaseRequirement
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else
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[-($1 || "="), Gem::Version.new($2)]
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end
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end
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##
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# An array of requirement pairs. The first element of the pair is
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# the op, and the second is the Gem::Version.
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attr_reader :requirements #:nodoc:
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##
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# Constructs a requirement from +requirements+. Requirements can be
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# Strings, Gem::Versions, or Arrays of those. +nil+ and duplicate
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# requirements are ignored. An empty set of +requirements+ is the
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# same as <tt>">= 0"</tt>.
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def initialize(*requirements)
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requirements = requirements.flatten
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requirements.compact!
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requirements.uniq!
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if requirements.empty?
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@requirements = [DefaultRequirement]
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else
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@requirements = requirements.map! {|r| self.class.parse r }
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end
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end
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##
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# Concatenates the +new+ requirements onto this requirement.
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def concat(new)
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new = new.flatten
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new.compact!
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new.uniq!
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new = new.map {|r| self.class.parse r }
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@requirements.concat new
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end
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##
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# Formats this requirement for use in a Gem::RequestSet::Lockfile.
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def for_lockfile # :nodoc:
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return if [DefaultRequirement] == @requirements
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list = requirements.sort_by do |_, version|
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version
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end.map do |op, version|
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"#{op} #{version}"
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end.uniq
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" (#{list.join ', '})"
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end
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##
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# true if this gem has no requirements.
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def none?
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if @requirements.size == 1
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@requirements[0] == DefaultRequirement
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else
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false
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end
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end
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##
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# true if the requirement is for only an exact version
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def exact?
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return false unless @requirements.size == 1
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@requirements[0][0] == "="
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end
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def as_list # :nodoc:
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requirements.map {|op, version| "#{op} #{version}" }
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end
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def hash # :nodoc:
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requirements.map {|r| r.first == "~>" ? [r[0], r[1].to_s] : r }.sort.hash
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end
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def marshal_dump # :nodoc:
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[@requirements]
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end
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def marshal_load(array) # :nodoc:
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@requirements = array[0]
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raise TypeError, "wrong @requirements" unless Array === @requirements
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end
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def yaml_initialize(tag, vals) # :nodoc:
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vals.each do |ivar, val|
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instance_variable_set "@#{ivar}", val
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end
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end
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def init_with(coder) # :nodoc:
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yaml_initialize coder.tag, coder.map
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end
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def to_yaml_properties # :nodoc:
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["@requirements"]
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end
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def encode_with(coder) # :nodoc:
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coder.add 'requirements', @requirements
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end
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##
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# A requirement is a prerelease if any of the versions inside of it
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# are prereleases
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def prerelease?
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requirements.any? {|r| r.last.prerelease? }
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end
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def pretty_print(q) # :nodoc:
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q.group 1, 'Gem::Requirement.new(', ')' do
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q.pp as_list
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end
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end
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##
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# True if +version+ satisfies this Requirement.
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def satisfied_by?(version)
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raise ArgumentError, "Need a Gem::Version: #{version.inspect}" unless
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Gem::Version === version
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requirements.all? {|op, rv| OPS[op].call version, rv }
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end
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alias :=== :satisfied_by?
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alias :=~ :satisfied_by?
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##
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# True if the requirement will not always match the latest version.
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def specific?
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return true if @requirements.length > 1 # GIGO, > 1, > 2 is silly
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not %w[> >=].include? @requirements.first.first # grab the operator
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end
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def to_s # :nodoc:
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as_list.join ", "
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end
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def ==(other) # :nodoc:
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return unless Gem::Requirement === other
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# An == check is always necessary
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return false unless _sorted_requirements == other._sorted_requirements
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# An == check is sufficient unless any requirements use ~>
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return true unless _tilde_requirements.any?
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# If any requirements use ~> we use the stricter `#eql?` that also checks
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# that version precision is the same
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_tilde_requirements.eql?(other._tilde_requirements)
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end
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protected
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def _sorted_requirements
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@_sorted_requirements ||= requirements.sort_by(&:to_s)
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end
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def _tilde_requirements
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@_tilde_requirements ||= _sorted_requirements.select {|r| r.first == "~>" }
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end
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end
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class Gem::Version
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# This is needed for compatibility with older yaml
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# gemspecs.
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Requirement = Gem::Requirement # :nodoc:
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end
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