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Edit File : requirement.rb \| Size : 6.91 KB
# frozen_string_literal: true require_relative "version" ## # 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 }, }.freeze SOURCE_SET_REQUIREMENT = Struct.new(:for_lockfile).new "!" # :nodoc: quoted = OPS.keys.map {\|k\| Regexp.quote k }.join "\|" PATTERN_RAW = "\\s(#{quoted})?\\s(#{Gem::Version::VERSION_PATTERN})\\s".freeze # :nodoc: ## # A regular expression that matches a requirement PATTERN = /\A#{PATTERN_RAW}\z/.freeze ## # The default requirement matches any non-prerelease version DefaultRequirement = [">=", Gem::Version.new(0)].freeze ## # The default requirement matches any version DefaultPrereleaseRequirement = [">=", Gem::Version.new("0.a")].freeze ## # 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(inputs) return new inputs if inputs.length > 1 input = inputs.shift case input when Gem::Requirement then input when Gem::Version, Array then new input when '!' then source_set else if input.respond_to? :to_str new [input.to_str] else default end end end def self.default new '>= 0' end def self.default_prerelease new '>= 0.a' end ### # A source set requirement, used for Gemfiles and lockfiles def self.source_set # :nodoc: SOURCE_SET_REQUIREMENT 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") # => [">", Gem::Version.new("1.0")] # parse("1.0") # => ["=", Gem::Version.new("1.0")] # parse(Gem::Version.new("1.0")) # => ["=, Gem::Version.new("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 elsif $1 == ">=" && $2 == "0.a" DefaultPrereleaseRequirement 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 do \|_, version\| version end.map do \|op, version\| "#{op} #{version}" end.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}" } end def hash # :nodoc: requirements.map {\|r\| r.first == "~>" ? [r[0], r[1].to_s] : r }.sort.hash end def marshal_dump # :nodoc: [@requirements] end def marshal_load(array) # :nodoc: @requirements = array[0] raise TypeError, "wrong @requirements" unless Array === @requirements end def yaml_initialize(tag, vals) # :nodoc: vals.each do \|ivar, val\| instance_variable_set "@#{ivar}", val end 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 requirements.all? {\|op, rv\| OPS[op].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: return unless Gem::Requirement === other # An == check is always necessary return false unless _sorted_requirements == other._sorted_requirements # An == check is sufficient unless any requirements use ~> return true unless _tilde_requirements.any? # If any requirements use ~> we use the stricter `#eql?` that also checks # that version precision is the same _tilde_requirements.eql?(other._tilde_requirements) end protected def _sorted_requirements @_sorted_requirements \|\|= requirements.sort_by(&:to_s) end def _tilde_requirements @_tilde_requirements \|\|= _sorted_requirements.select {\|r\| r.first == "~>" } end end class Gem::Version # This is needed for compatibility with older yaml # gemspecs. Requirement = Gem::Requirement # :nodoc: end Back

Edit File : requirement.rb | Size : 6.91 KB

# frozen_string_literal: true
require_relative "version"

##
# 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 },
  }.freeze

SOURCE_SET_REQUIREMENT = Struct.new(:for_lockfile).new "!" # :nodoc:

quoted = OPS.keys.map {|k| Regexp.quote k }.join "|"
  PATTERN_RAW = "\\s*(#{quoted})?\\s*(#{Gem::Version::VERSION_PATTERN})\\s*".freeze # :nodoc:

##
  # A regular expression that matches a requirement

PATTERN = /\A#{PATTERN_RAW}\z/.freeze

##
  # The default requirement matches any non-prerelease version

DefaultRequirement = [">=", Gem::Version.new(0)].freeze

##
  # The default requirement matches any version

DefaultPrereleaseRequirement = [">=", Gem::Version.new("0.a")].freeze

##
  # 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(*inputs)
    return new inputs if inputs.length > 1

input = inputs.shift

case input
    when Gem::Requirement then
      input
    when Gem::Version, Array then
      new input
    when '!' then
      source_set
    else
      if input.respond_to? :to_str
        new [input.to_str]
      else
        default
      end
    end
  end

def self.default
    new '>= 0'
  end

def self.default_prerelease
    new '>= 0.a'
  end

###
  # A source set requirement, used for Gemfiles and lockfiles

def self.source_set # :nodoc:
    SOURCE_SET_REQUIREMENT
  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")                 # => [">", Gem::Version.new("1.0")]
  #     parse("1.0")                   # => ["=", Gem::Version.new("1.0")]
  #     parse(Gem::Version.new("1.0")) # => ["=,  Gem::Version.new("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
    elsif $1 == ">=" && $2 == "0.a"
      DefaultPrereleaseRequirement
    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 do |_, version|
      version
    end.map do |op, version|
      "#{op} #{version}"
    end.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}" }
  end

def hash # :nodoc:
    requirements.map {|r| r.first == "~>" ? [r[0], r[1].to_s] : r }.sort.hash
  end

def marshal_dump # :nodoc:
    [@requirements]
  end

def marshal_load(array) # :nodoc:
    @requirements = array[0]

raise TypeError, "wrong @requirements" unless Array === @requirements
  end

def yaml_initialize(tag, vals) # :nodoc:
    vals.each do |ivar, val|
      instance_variable_set "@#{ivar}", val
    end
  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
    requirements.all? {|op, rv| OPS[op].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:
    return unless Gem::Requirement === other

# An == check is always necessary
    return false unless _sorted_requirements == other._sorted_requirements

# An == check is sufficient unless any requirements use ~>
    return true unless _tilde_requirements.any?

# If any requirements use ~> we use the stricter `#eql?` that also checks
    # that version precision is the same
    _tilde_requirements.eql?(other._tilde_requirements)
  end

protected

def _sorted_requirements
    @_sorted_requirements ||= requirements.sort_by(&:to_s)
  end

def _tilde_requirements
    @_tilde_requirements ||= _sorted_requirements.select {|r| r.first == "~>" }
  end
end

class Gem::Version
  # This is needed for compatibility with older yaml
  # gemspecs.

Requirement = Gem::Requirement # :nodoc:
end

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