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Editing: platform.rb

# frozen_string_literal: true

##
# Available list of platforms for targeting Gem installations.
#
# See `gem help platform` for information on platform matching.

class Gem::Platform
  @local = nil

attr_accessor :cpu, :os, :version

def self.local(refresh: false)
    return @local if @local && !refresh
    @local = begin
      arch = Gem.target_rbconfig["arch"]
      arch = "#{arch}_60" if /mswin(?:32|64)$/.match?(arch)
      new(arch)
    end
  end

def self.match_platforms?(platform, platforms)
    platform = Gem::Platform.new(platform) unless platform.is_a?(Gem::Platform)
    platforms.any? do |local_platform|
      platform.nil? ||
        local_platform == platform ||
        (local_platform != Gem::Platform::RUBY && platform =~ local_platform)
    end
  end
  private_class_method :match_platforms?

def self.match_spec?(spec)
    match_gem?(spec.platform, spec.name)
  end

if RUBY_ENGINE == "truffleruby"
    def self.match_gem?(platform, gem_name)
      raise "Not a string: #{gem_name.inspect}" unless String === gem_name

if REUSE_AS_BINARY_ON_TRUFFLERUBY.include?(gem_name)
        match_platforms?(platform, [Gem::Platform::RUBY, Gem::Platform.local])
      else
        match_platforms?(platform, Gem.platforms)
      end
    end
  else
    def self.match_gem?(platform, gem_name)
      match_platforms?(platform, Gem.platforms)
    end
  end

def self.sort_priority(platform)
    platform == Gem::Platform::RUBY ? -1 : 1
  end

def self.installable?(spec)
    if spec.respond_to? :installable_platform?
      spec.installable_platform?
    else
      match_spec? spec
    end
  end

def self.new(arch) # :nodoc:
    case arch
    when Gem::Platform::CURRENT then
      Gem::Platform.local
    when Gem::Platform::RUBY, nil, "" then
      Gem::Platform::RUBY
    else
      super
    end
  end

def initialize(arch)
    case arch
    when Array then
      @cpu, @os, @version = arch
    when String then
      cpu, os = arch.sub(/-+$/, "").split("-", 2)

@cpu = if cpu&.match?(/i\d86/)
        "x86"
      else
        cpu
      end

if os.nil?
        @cpu = nil
        os = cpu
      end # legacy jruby

@os, @version = case os
                      when /aix-?(\d+)?/ then                ["aix",     $1]
                      when /cygwin/ then                     ["cygwin",  nil]
                      when /darwin-?(\d+)?/ then             ["darwin",  $1]
                      when "macruby" then                    ["macruby", nil]
                      when /^macruby-?(\d+(?:\.\d+)*)?/ then ["macruby", $1]
                      when /freebsd-?(\d+)?/ then            ["freebsd", $1]
                      when "java", "jruby" then              ["java",    nil]
                      when /^java-?(\d+(?:\.\d+)*)?/ then    ["java",    $1]
                      when /^dalvik-?(\d+)?$/ then           ["dalvik",  $1]
                      when /^dotnet$/ then                   ["dotnet",  nil]
                      when /^dotnet-?(\d+(?:\.\d+)*)?/ then  ["dotnet",  $1]
                      when /linux-?(\w+)?/ then              ["linux",   $1]
                      when /mingw32/ then                    ["mingw32", nil]
                      when /mingw-?(\w+)?/ then              ["mingw",   $1]
                      when /(mswin\d+)(?:[_-](\d+))?/ then
                        os = $1
                        version = $2
                        @cpu = "x86" if @cpu.nil? && os.end_with?("32")
                        [os, version]
                      when /netbsdelf/ then                  ["netbsdelf", nil]
                      when /openbsd-?(\d+\.\d+)?/ then       ["openbsd",   $1]
                      when /solaris-?(\d+\.\d+)?/ then       ["solaris",   $1]
                      when /wasi/ then                       ["wasi",      nil]
                      # test
                      when /^(\w+_platform)-?(\d+)?/ then    [$1,          $2]
                      else ["unknown", nil]
      end
    when Gem::Platform then
      @cpu = arch.cpu
      @os = arch.os
      @version = arch.version
    else
      raise ArgumentError, "invalid argument #{arch.inspect}"
    end
  end

def to_a
    [@cpu, @os, @version]
  end

def to_s
    to_a.compact.join(@cpu.nil? ? "" : "-")
  end

##
  # Deconstructs the platform into an array for pattern matching.
  # Returns [cpu, os, version].
  #
  #   Gem::Platform.new("x86_64-linux").deconstruct  #=> ["x86_64", "linux", nil]
  #
  # This enables array pattern matching:
  #
  #   case Gem::Platform.new("arm64-darwin-21")
  #   in ["arm64", "darwin", version]
  #     # version => "21"
  #   end
  alias_method :deconstruct, :to_a

##
  # Deconstructs the platform into a hash for pattern matching.
  # Returns a hash with keys +:cpu+, +:os+, and +:version+.
  #
  #   Gem::Platform.new("x86_64-darwin-20").deconstruct_keys(nil)
  #   #=> { cpu: "x86_64", os: "darwin", version: "20" }
  #
  # This enables hash pattern matching:
  #
  #   case Gem::Platform.new("x86_64-linux")
  #   in cpu: "x86_64", os: "linux"
  #     # Matches Linux on x86_64
  #   end
  def deconstruct_keys(keys)
    { cpu: @cpu, os: @os, version: @version }
  end

##
  # Is +other+ equal to this platform?  Two platforms are equal if they have
  # the same CPU, OS and version.

def ==(other)
    self.class === other && to_a == other.to_a
  end

alias_method :eql?, :==

def hash # :nodoc:
    to_a.hash
  end

##
  # Does +other+ match this platform?  Two platforms match if they have the
  # same CPU, or either has a CPU of 'universal', they have the same OS, and
  # they have the same version, or either one has no version
  #
  # Additionally, the platform will match if the local CPU is 'arm' and the
  # other CPU starts with "armv" (for generic 32-bit ARM family support).
  #
  # Of note, this method is not commutative. Indeed the OS 'linux' has a
  # special case: the version is the libc name, yet while "no version" stands
  # as a wildcard for a binary gem platform (as for other OSes), for the
  # runtime platform "no version" stands for 'gnu'. To be able to distinguish
  # these, the method receiver is the gem platform, while the argument is
  # the runtime platform.
  #
  #--
  # NOTE: Until it can be removed, changes to this method must also be reflected in `bundler/lib/bundler/rubygems_ext.rb`

def ===(other)
    return nil unless Gem::Platform === other

# universal-mingw32 matches x64-mingw-ucrt
    return true if (@cpu == "universal" || other.cpu == "universal") &&
                   @os.start_with?("mingw") && other.os.start_with?("mingw")

# cpu
    ([nil,"universal"].include?(@cpu) || [nil, "universal"].include?(other.cpu) || @cpu == other.cpu ||
    (@cpu == "arm" && other.cpu.start_with?("armv"))) &&

# os
      @os == other.os &&

# version
      (
        (@os != "linux" && (@version.nil? || other.version.nil?)) ||
        (@os == "linux" && (normalized_linux_version == other.normalized_linux_version || ["musl#{@version}", "musleabi#{@version}", "musleabihf#{@version}"].include?(other.version))) ||
        @version == other.version
      )
  end

#--
  # NOTE: Until it can be removed, changes to this method must also be reflected in `bundler/lib/bundler/rubygems_ext.rb`

def normalized_linux_version
    return nil unless @version

without_gnu_nor_abi_modifiers = @version.sub(/\Agnu/, "").sub(/eabi(hf)?\Z/, "")
    return nil if without_gnu_nor_abi_modifiers.empty?

without_gnu_nor_abi_modifiers
  end

##
  # Does +other+ match this platform?  If +other+ is a String it will be
  # converted to a Gem::Platform first.  See #=== for matching rules.

def =~(other)
    case other
    when Gem::Platform then # nop
    when String then
      # This data is from http://gems.rubyforge.org/gems/yaml on 19 Aug 2007
      other = case other
              when /^i686-darwin(\d)/     then ["x86",       "darwin",  $1]
              when /^i\d86-linux/         then ["x86",       "linux",   nil]
              when "java", "jruby"        then [nil,         "java",    nil]
              when /^dalvik(\d+)?$/       then [nil,         "dalvik",  $1]
              when /dotnet(\-(\d+\.\d+))?/ then ["universal","dotnet",  $2]
              when /mswin32(\_(\d+))?/    then ["x86",       "mswin32", $2]
              when /mswin64(\_(\d+))?/    then ["x64",       "mswin64", $2]
              when "powerpc-darwin"       then ["powerpc",   "darwin",  nil]
              when /powerpc-darwin(\d)/   then ["powerpc",   "darwin",  $1]
              when /sparc-solaris2.8/     then ["sparc",     "solaris", "2.8"]
              when /universal-darwin(\d)/ then ["universal", "darwin",  $1]
              else other
      end

other = Gem::Platform.new other
    else
      return nil
    end

self === other
  end

##
  # A pure-Ruby gem that may use Gem::Specification#extensions to build
  # binary files.

RUBY = "ruby"

##
  # A platform-specific gem that is built for the packaging Ruby's platform.
  # This will be replaced with Gem::Platform::local.

CURRENT = "current"

JAVA  = Gem::Platform.new("java") # :nodoc:
  MSWIN = Gem::Platform.new("mswin32") # :nodoc:
  MSWIN64 = Gem::Platform.new("mswin64") # :nodoc:
  MINGW = Gem::Platform.new("x86-mingw32") # :nodoc:
  X64_MINGW_LEGACY = Gem::Platform.new("x64-mingw32") # :nodoc:
  X64_MINGW = Gem::Platform.new("x64-mingw-ucrt") # :nodoc:
  UNIVERSAL_MINGW = Gem::Platform.new("universal-mingw") # :nodoc:
  WINDOWS = [MSWIN, MSWIN64, UNIVERSAL_MINGW].freeze # :nodoc:
  X64_LINUX = Gem::Platform.new("x86_64-linux") # :nodoc:
  X64_LINUX_MUSL = Gem::Platform.new("x86_64-linux-musl") # :nodoc:

GENERICS = [JAVA, *WINDOWS].freeze # :nodoc:
  private_constant :GENERICS

GENERIC_CACHE = GENERICS.each_with_object({}) {|g, h| h[g] = g } # :nodoc:
  private_constant :GENERIC_CACHE

class << self
    ##
    # Returns the generic platform for the given platform.

def generic(platform)
      return Gem::Platform::RUBY if platform.nil? || platform == Gem::Platform::RUBY

GENERIC_CACHE[platform] ||= begin
        found = GENERICS.find do |match|
          platform === match
        end
        found || Gem::Platform::RUBY
      end
    end

##
    # Returns the platform specificity match for the given spec platform and user platform.

def platform_specificity_match(spec_platform, user_platform)
      return -1 if spec_platform == user_platform
      return 1_000_000 if spec_platform.nil? || spec_platform == Gem::Platform::RUBY || user_platform == Gem::Platform::RUBY

os_match(spec_platform, user_platform) +
        cpu_match(spec_platform, user_platform) * 10 +
        version_match(spec_platform, user_platform) * 100
    end

##
    # Sorts and filters the best platform match for the given matching specs and platform.

def sort_and_filter_best_platform_match(matching, platform)
      return matching if matching.one?

exact = matching.select {|spec| spec.platform == platform }
      return exact if exact.any?

sorted_matching = sort_best_platform_match(matching, platform)
      exemplary_spec = sorted_matching.first

sorted_matching.take_while {|spec| same_specificity?(platform, spec, exemplary_spec) && same_deps?(spec, exemplary_spec) }
    end

##
    # Sorts the best platform match for the given matching specs and platform.

def sort_best_platform_match(matching, platform)
      matching.sort_by.with_index do |spec, i|
        [
          platform_specificity_match(spec.platform, platform),
          i, # for stable sort
        ]
      end
    end

private

def same_specificity?(platform, spec, exemplary_spec)
      platform_specificity_match(spec.platform, platform) == platform_specificity_match(exemplary_spec.platform, platform)
    end

def same_deps?(spec, exemplary_spec)
      spec.required_ruby_version == exemplary_spec.required_ruby_version &&
        spec.required_rubygems_version == exemplary_spec.required_rubygems_version &&
        spec.dependencies.sort == exemplary_spec.dependencies.sort
    end

def os_match(spec_platform, user_platform)
      if spec_platform.os == user_platform.os
        0
      else
        1
      end
    end

def cpu_match(spec_platform, user_platform)
      if spec_platform.cpu == user_platform.cpu
        0
      elsif spec_platform.cpu == "arm" && user_platform.cpu.to_s.start_with?("arm")
        0
      elsif spec_platform.cpu.nil? || spec_platform.cpu == "universal"
        1
      else
        2
      end
    end

def version_match(spec_platform, user_platform)
      if spec_platform.version == user_platform.version
        0
      elsif spec_platform.version.nil?
        1
      else
        2
      end
    end
  end
end

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