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Edit File : version.rb \| Size : 11.97 KB
# frozen_string_literal: true ## # The Version class processes string versions into comparable # values. A version string should normally be a series of numbers # separated by periods. Each part (digits separated by periods) is # considered its own number, and these are used for sorting. So for # instance, 3.10 sorts higher than 3.2 because ten is greater than # two. # # If any part contains letters (currently only a-z are supported) then # that version is considered prerelease. Versions with a prerelease # part in the Nth part sort less than versions with N-1 # parts. Prerelease parts are sorted alphabetically using the normal # Ruby string sorting rules. If a prerelease part contains both # letters and numbers, it will be broken into multiple parts to # provide expected sort behavior (1.0.a10 becomes 1.0.a.10, and is # greater than 1.0.a9). # # Prereleases sort between real releases (newest to oldest): # # 1. 1.0 # 2. 1.0.b1 # 3. 1.0.a.2 # 4. 0.9 # # If you want to specify a version restriction that includes both prereleases # and regular releases of the 1.x series this is the best way: # # s.add_dependency 'example', '>= 1.0.0.a', '< 2.0.0' # # == How Software Changes # # Users expect to be able to specify a version constraint that gives them # some reasonable expectation that new versions of a library will work with # their software if the version constraint is true, and not work with their # software if the version constraint is false. In other words, the perfect # system will accept all compatible versions of the library and reject all # incompatible versions. # # Libraries change in 3 ways (well, more than 3, but stay focused here!). # # 1. The change may be an implementation detail only and have no effect on # the client software. # 2. The change may add new features, but do so in a way that client software # written to an earlier version is still compatible. # 3. The change may change the public interface of the library in such a way # that old software is no longer compatible. # # Some examples are appropriate at this point. Suppose I have a Stack class # that supports a <tt>push</tt> and a <tt>pop</tt> method. # # === Examples of Category 1 changes: # # * Switch from an array based implementation to a linked-list based # implementation. # * Provide an automatic (and transparent) backing store for large stacks. # # === Examples of Category 2 changes might be: # # * Add a <tt>depth</tt> method to return the current depth of the stack. # * Add a <tt>top</tt> method that returns the current top of stack (without # changing the stack). # * Change <tt>push</tt> so that it returns the item pushed (previously it # had no usable return value). # # === Examples of Category 3 changes might be: # # * Changes <tt>pop</tt> so that it no longer returns a value (you must use # <tt>top</tt> to get the top of the stack). # * Rename the methods to <tt>push_item</tt> and <tt>pop_item</tt>. # # == RubyGems Rational Versioning # # * Versions shall be represented by three non-negative integers, separated # by periods (e.g. 3.1.4). The first integers is the "major" version # number, the second integer is the "minor" version number, and the third # integer is the "build" number. # # * A category 1 change (implementation detail) will increment the build # number. # # * A category 2 change (backwards compatible) will increment the minor # version number and reset the build number. # # * A category 3 change (incompatible) will increment the major build number # and reset the minor and build numbers. # # * Any "public" release of a gem should have a different version. Normally # that means incrementing the build number. This means a developer can # generate builds all day long, but as soon as they make a public release, # the version must be updated. # # === Examples # # Let's work through a project lifecycle using our Stack example from above. # # Version 0.0.1:: The initial Stack class is release. # Version 0.0.2:: Switched to a linked=list implementation because it is # cooler. # Version 0.1.0:: Added a <tt>depth</tt> method. # Version 1.0.0:: Added <tt>top</tt> and made <tt>pop</tt> return nil # (<tt>pop</tt> used to return the old top item). # Version 1.1.0:: <tt>push</tt> now returns the value pushed (it used it # return nil). # Version 1.1.1:: Fixed a bug in the linked list implementation. # Version 1.1.2:: Fixed a bug introduced in the last fix. # # Client A needs a stack with basic push/pop capability. They write to the # original interface (no <tt>top</tt>), so their version constraint looks like: # # gem 'stack', '>= 0.0' # # Essentially, any version is OK with Client A. An incompatible change to # the library will cause them grief, but they are willing to take the chance # (we call Client A optimistic). # # Client B is just like Client A except for two things: (1) They use the # <tt>depth</tt> method and (2) they are worried about future # incompatibilities, so they write their version constraint like this: # # gem 'stack', '~> 0.1' # # The <tt>depth</tt> method was introduced in version 0.1.0, so that version # or anything later is fine, as long as the version stays below version 1.0 # where incompatibilities are introduced. We call Client B pessimistic # because they are worried about incompatible future changes (it is OK to be # pessimistic!). # # == Preventing Version Catastrophe: # # From: http://blog.zenspider.com/2008/10/rubygems-howto-preventing-cata.html # # Let's say you're depending on the fnord gem version 2.y.z. If you # specify your dependency as ">= 2.0.0" then, you're good, right? What # happens if fnord 3.0 comes out and it isn't backwards compatible # with 2.y.z? Your stuff will break as a result of using ">=". The # better route is to specify your dependency with an "approximate" version # specifier ("~>"). They're a tad confusing, so here is how the dependency # specifiers work: # # Specification From ... To (exclusive) # ">= 3.0" 3.0 ... ∞ # "~> 3.0" 3.0 ... 4.0 # "~> 3.0.0" 3.0.0 ... 3.1 # "~> 3.5" 3.5 ... 4.0 # "~> 3.5.0" 3.5.0 ... 3.6 # "~> 3" 3.0 ... 4.0 # # For the last example, single-digit versions are automatically extended with # a zero to give a sensible result. class Gem::Version autoload :Requirement, 'rubygems/requirement' include Comparable VERSION_PATTERN = '[0-9]+(?>\.[0-9a-zA-Z]+)(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+))?' # :nodoc: ANCHORED_VERSION_PATTERN = /\A\s(#{VERSION_PATTERN})?\s\z/ # :nodoc: ## # A string representation of this Version. def version @version.dup end alias to_s version ## # True if the +version+ string matches RubyGems' requirements. def self.correct? version !!(version.to_s =~ ANCHORED_VERSION_PATTERN) end ## # Factory method to create a Version object. Input may be a Version # or a String. Intended to simplify client code. # # ver1 = Version.create('1.3.17') # -> (Version object) # ver2 = Version.create(ver1) # -> (ver1) # ver3 = Version.create(nil) # -> nil def self.create input if self === input then # check yourself before you wreck yourself input elsif input.nil? then nil else new input end end @@all = {} def self.new version # :nodoc: return super unless Gem::Version == self @@all[version] \|\|= super end ## # Constructs a Version from the +version+ string. A version string is a # series of digits or ASCII letters separated by dots. def initialize version unless self.class.correct?(version) raise ArgumentError, "Malformed version number string #{version}" end # If version is an empty string convert it to 0 version = 0 if version =~ /\A\s*\Z/ @version = version.to_s.strip.gsub("-",".pre.") @segments = nil end ## # Return a new version object where the next to the last revision # number is one greater (e.g., 5.3.1 => 5.4). # # Pre-release (alpha) parts, e.g, 5.3.1.b.2 => 5.4, are ignored. def bump @bump \|\|= begin segments = self.segments segments.pop while segments.any? { \|s\| String === s } segments.pop if segments.size > 1 segments[-1] = segments[-1].succ self.class.new segments.join(".") end end ## # A Version is only eql? to another version if it's specified to the # same precision. Version "1.0" is not the same as version "1". def eql? other self.class === other and @version == other._version end def hash # :nodoc: canonical_segments.hash end def init_with coder # :nodoc: yaml_initialize coder.tag, coder.map end def inspect # :nodoc: "#<#{self.class} #{version.inspect}>" end ## # Dump only the raw version string, not the complete object. It's a # string for backwards (RubyGems 1.3.5 and earlier) compatibility. def marshal_dump [version] end ## # Load custom marshal format. It's a string for backwards (RubyGems # 1.3.5 and earlier) compatibility. def marshal_load array initialize array[0] end def yaml_initialize(tag, map) # :nodoc: @version = map['version'] @segments = nil @hash = nil end def to_yaml_properties # :nodoc: ["@version"] end def encode_with coder # :nodoc: coder.add 'version', @version end ## # A version is considered a prerelease if it contains a letter. def prerelease? unless instance_variable_defined? :@prerelease @prerelease = !!(@version =~ /[a-zA-Z]/) end @prerelease end def pretty_print q # :nodoc: q.text "Gem::Version.new(#{version.inspect})" end ## # The release for this version (e.g. 1.2.0.a -> 1.2.0). # Non-prerelease versions return themselves. def release @release \|\|= if prerelease? segments = self.segments segments.pop while segments.any? { \|s\| String === s } self.class.new segments.join('.') else self end end def segments # :nodoc: _segments.dup end ## # A recommended version for use with a ~> Requirement. def approximate_recommendation segments = self.segments segments.pop while segments.any? { \|s\| String === s } segments.pop while segments.size > 2 segments.push 0 while segments.size < 2 "~> #{segments.join(".")}" end ## # Compares this version with +other+ returning -1, 0, or 1 if the # other version is larger, the same, or smaller than this # one. Attempts to compare to something that's not a # <tt>Gem::Version</tt> return +nil+. def <=> other return unless Gem::Version === other return 0 if @version == other._version \|\| canonical_segments == other.canonical_segments lhsegments = _segments rhsegments = other._segments lhsize = lhsegments.size rhsize = rhsegments.size limit = (lhsize > rhsize ? lhsize : rhsize) - 1 i = 0 while i <= limit lhs, rhs = lhsegments[i] \|\| 0, rhsegments[i] \|\| 0 i += 1 next if lhs == rhs return -1 if String === lhs && Numeric === rhs return 1 if Numeric === lhs && String === rhs return lhs <=> rhs end return 0 end def canonical_segments @canonical_segments \|\|= _split_segments.map! do \|segments\| segments.reverse_each.drop_while {\|s\| s == 0 }.reverse end.reduce(&:concat) end protected def _version @version end def _segments # segments is lazy so it can pick up version values that come from # old marshaled versions, which don't go through marshal_load. # since this version object is cached in @@all, its @segments should be frozen @segments \|\|= @version.scan(/[0-9]+\|[a-z]+/i).map do \|s\| /^\d+$/ =~ s ? s.to_i : s end.freeze end def _split_segments string_start = _segments.index {\|s\| s.is_a?(String) } string_segments = segments numeric_segments = string_segments.slice!(0, string_start \|\| string_segments.size) return numeric_segments, string_segments end end Back

Edit File : version.rb | Size : 11.97 KB

# frozen_string_literal: true
##
# The Version class processes string versions into comparable
# values. A version string should normally be a series of numbers
# separated by periods. Each part (digits separated by periods) is
# considered its own number, and these are used for sorting. So for
# instance, 3.10 sorts higher than 3.2 because ten is greater than
# two.
#
# If any part contains letters (currently only a-z are supported) then
# that version is considered prerelease. Versions with a prerelease
# part in the Nth part sort less than versions with N-1
# parts. Prerelease parts are sorted alphabetically using the normal
# Ruby string sorting rules. If a prerelease part contains both
# letters and numbers, it will be broken into multiple parts to
# provide expected sort behavior (1.0.a10 becomes 1.0.a.10, and is
# greater than 1.0.a9).
#
# Prereleases sort between real releases (newest to oldest):
#
# 1. 1.0
# 2. 1.0.b1
# 3. 1.0.a.2
# 4. 0.9
#
# If you want to specify a version restriction that includes both prereleases
# and regular releases of the 1.x series this is the best way:
#
#   s.add_dependency 'example', '>= 1.0.0.a', '< 2.0.0'
#
# == How Software Changes
#
# Users expect to be able to specify a version constraint that gives them
# some reasonable expectation that new versions of a library will work with
# their software if the version constraint is true, and not work with their
# software if the version constraint is false.  In other words, the perfect
# system will accept all compatible versions of the library and reject all
# incompatible versions.
#
# Libraries change in 3 ways (well, more than 3, but stay focused here!).
#
# 1. The change may be an implementation detail only and have no effect on
#    the client software.
# 2. The change may add new features, but do so in a way that client software
#    written to an earlier version is still compatible.
# 3. The change may change the public interface of the library in such a way
#    that old software is no longer compatible.
#
# Some examples are appropriate at this point.  Suppose I have a Stack class
# that supports a <tt>push</tt> and a <tt>pop</tt> method.
#
# === Examples of Category 1 changes:
#
# * Switch from an array based implementation to a linked-list based
#   implementation.
# * Provide an automatic (and transparent) backing store for large stacks.
#
# === Examples of Category 2 changes might be:
#
# * Add a <tt>depth</tt> method to return the current depth of the stack.
# * Add a <tt>top</tt> method that returns the current top of stack (without
#   changing the stack).
# * Change <tt>push</tt> so that it returns the item pushed (previously it
#   had no usable return value).
#
# === Examples of Category 3 changes might be:
#
# * Changes <tt>pop</tt> so that it no longer returns a value (you must use
#   <tt>top</tt> to get the top of the stack).
# * Rename the methods to <tt>push_item</tt> and <tt>pop_item</tt>.
#
# == RubyGems Rational Versioning
#
# * Versions shall be represented by three non-negative integers, separated
#   by periods (e.g. 3.1.4).  The first integers is the "major" version
#   number, the second integer is the "minor" version number, and the third
#   integer is the "build" number.
#
# * A category 1 change (implementation detail) will increment the build
#   number.
#
# * A category 2 change (backwards compatible) will increment the minor
#   version number and reset the build number.
#
# * A category 3 change (incompatible) will increment the major build number
#   and reset the minor and build numbers.
#
# * Any "public" release of a gem should have a different version.  Normally
#   that means incrementing the build number.  This means a developer can
#   generate builds all day long, but as soon as they make a public release,
#   the version must be updated.
#
# === Examples
#
# Let's work through a project lifecycle using our Stack example from above.
#
# Version 0.0.1:: The initial Stack class is release.
# Version 0.0.2:: Switched to a linked=list implementation because it is
#                 cooler.
# Version 0.1.0:: Added a <tt>depth</tt> method.
# Version 1.0.0:: Added <tt>top</tt> and made <tt>pop</tt> return nil
#                 (<tt>pop</tt> used to return the  old top item).
# Version 1.1.0:: <tt>push</tt> now returns the value pushed (it used it
#                 return nil).
# Version 1.1.1:: Fixed a bug in the linked list implementation.
# Version 1.1.2:: Fixed a bug introduced in the last fix.
#
# Client A needs a stack with basic push/pop capability.  They write to the
# original interface (no <tt>top</tt>), so their version constraint looks like:
#
#   gem 'stack', '>= 0.0'
#
# Essentially, any version is OK with Client A.  An incompatible change to
# the library will cause them grief, but they are willing to take the chance
# (we call Client A optimistic).
#
# Client B is just like Client A except for two things: (1) They use the
# <tt>depth</tt> method and (2) they are worried about future
# incompatibilities, so they write their version constraint like this:
#
#   gem 'stack', '~> 0.1'
#
# The <tt>depth</tt> method was introduced in version 0.1.0, so that version
# or anything later is fine, as long as the version stays below version 1.0
# where incompatibilities are introduced.  We call Client B pessimistic
# because they are worried about incompatible future changes (it is OK to be
# pessimistic!).
#
# == Preventing Version Catastrophe:
#
# From: http://blog.zenspider.com/2008/10/rubygems-howto-preventing-cata.html
#
# Let's say you're depending on the fnord gem version 2.y.z. If you
# specify your dependency as ">= 2.0.0" then, you're good, right? What
# happens if fnord 3.0 comes out and it isn't backwards compatible
# with 2.y.z? Your stuff will break as a result of using ">=". The
# better route is to specify your dependency with an "approximate" version
# specifier ("~>"). They're a tad confusing, so here is how the dependency
# specifiers work:
#
#   Specification From  ... To (exclusive)
#   ">= 3.0"      3.0   ... &infin;
#   "~> 3.0"      3.0   ... 4.0
#   "~> 3.0.0"    3.0.0 ... 3.1
#   "~> 3.5"      3.5   ... 4.0
#   "~> 3.5.0"    3.5.0 ... 3.6
#   "~> 3"        3.0   ... 4.0
#
# For the last example, single-digit versions are automatically extended with
# a zero to give a sensible result.

class Gem::Version
  autoload :Requirement, 'rubygems/requirement'

include Comparable

VERSION_PATTERN = '[0-9]+(?>\.[0-9a-zA-Z]+)*(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?' # :nodoc:
  ANCHORED_VERSION_PATTERN = /\A\s*(#{VERSION_PATTERN})?\s*\z/ # :nodoc:

##
  # A string representation of this Version.

def version
    @version.dup
  end

alias to_s version

##
  # True if the +version+ string matches RubyGems' requirements.

def self.correct? version
    !!(version.to_s =~ ANCHORED_VERSION_PATTERN)
  end

##
  # Factory method to create a Version object. Input may be a Version
  # or a String. Intended to simplify client code.
  #
  #   ver1 = Version.create('1.3.17')   # -> (Version object)
  #   ver2 = Version.create(ver1)       # -> (ver1)
  #   ver3 = Version.create(nil)        # -> nil

def self.create input
    if self === input then # check yourself before you wreck yourself
      input
    elsif input.nil? then
      nil
    else
      new input
    end
  end

@@all = {}

def self.new version # :nodoc:
    return super unless Gem::Version == self

@@all[version] ||= super
  end

##
  # Constructs a Version from the +version+ string.  A version string is a
  # series of digits or ASCII letters separated by dots.

def initialize version
    unless self.class.correct?(version)
      raise ArgumentError, "Malformed version number string #{version}"
    end

# If version is an empty string convert it to 0
    version = 0 if version =~ /\A\s*\Z/

@version = version.to_s.strip.gsub("-",".pre.")
    @segments = nil
  end

##
  # Return a new version object where the next to the last revision
  # number is one greater (e.g., 5.3.1 => 5.4).
  #
  # Pre-release (alpha) parts, e.g, 5.3.1.b.2 => 5.4, are ignored.

def bump
    @bump ||= begin
                segments = self.segments
                segments.pop while segments.any? { |s| String === s }
                segments.pop if segments.size > 1

segments[-1] = segments[-1].succ
                self.class.new segments.join(".")
              end
  end

##
  # A Version is only eql? to another version if it's specified to the
  # same precision. Version "1.0" is not the same as version "1".

def eql? other
    self.class === other and @version == other._version
  end

def hash # :nodoc:
    canonical_segments.hash
  end

def init_with coder # :nodoc:
    yaml_initialize coder.tag, coder.map
  end

def inspect # :nodoc:
    "#<#{self.class} #{version.inspect}>"
  end

##
  # Dump only the raw version string, not the complete object. It's a
  # string for backwards (RubyGems 1.3.5 and earlier) compatibility.

def marshal_dump
    [version]
  end

##
  # Load custom marshal format. It's a string for backwards (RubyGems
  # 1.3.5 and earlier) compatibility.

def marshal_load array
    initialize array[0]
  end

def yaml_initialize(tag, map) # :nodoc:
    @version = map['version']
    @segments = nil
    @hash = nil
  end

def to_yaml_properties # :nodoc:
    ["@version"]
  end

def encode_with coder # :nodoc:
    coder.add 'version', @version
  end

##
  # A version is considered a prerelease if it contains a letter.

def prerelease?
    unless instance_variable_defined? :@prerelease
      @prerelease = !!(@version =~ /[a-zA-Z]/)
    end
    @prerelease
  end

def pretty_print q # :nodoc:
    q.text "Gem::Version.new(#{version.inspect})"
  end

##
  # The release for this version (e.g. 1.2.0.a -> 1.2.0).
  # Non-prerelease versions return themselves.

def release
    @release ||= if prerelease?
                   segments = self.segments
                   segments.pop while segments.any? { |s| String === s }
                   self.class.new segments.join('.')
                 else
                   self
                 end
  end

def segments # :nodoc:
    _segments.dup
  end

##
  # A recommended version for use with a ~> Requirement.

def approximate_recommendation
    segments = self.segments

segments.pop    while segments.any? { |s| String === s }
    segments.pop    while segments.size > 2
    segments.push 0 while segments.size < 2

"~> #{segments.join(".")}"
  end

##
  # Compares this version with +other+ returning -1, 0, or 1 if the
  # other version is larger, the same, or smaller than this
  # one. Attempts to compare to something that's not a
  # <tt>Gem::Version</tt> return +nil+.

def <=> other
    return unless Gem::Version === other
    return 0 if @version == other._version || canonical_segments == other.canonical_segments

lhsegments = _segments
    rhsegments = other._segments

lhsize = lhsegments.size
    rhsize = rhsegments.size
    limit  = (lhsize > rhsize ? lhsize : rhsize) - 1

i = 0

while i <= limit
      lhs, rhs = lhsegments[i] || 0, rhsegments[i] || 0
      i += 1

next      if lhs == rhs
      return -1 if String  === lhs && Numeric === rhs
      return  1 if Numeric === lhs && String  === rhs

return lhs <=> rhs
    end

return 0
  end

def canonical_segments
    @canonical_segments ||=
      _split_segments.map! do |segments|
        segments.reverse_each.drop_while {|s| s == 0 }.reverse
      end.reduce(&:concat)
  end

protected

def _version
    @version
  end

def _segments
    # segments is lazy so it can pick up version values that come from
    # old marshaled versions, which don't go through marshal_load.
    # since this version object is cached in @@all, its @segments should be frozen

@segments ||= @version.scan(/[0-9]+|[a-z]+/i).map do |s|
      /^\d+$/ =~ s ? s.to_i : s
    end.freeze
  end

def _split_segments
    string_start = _segments.index {|s| s.is_a?(String) }
    string_segments  = segments
    numeric_segments = string_segments.slice!(0, string_start || string_segments.size)
    return numeric_segments, string_segments
  end
end

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