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Filename : compatibility.rb

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# frozen_string_literal: true

#--
# This file contains all sorts of little compatibility hacks that we've
# had to introduce over the years. Quarantining them into one file helps
# us know when we can get rid of them.
#
# Ruby 1.9.x has introduced some things that are awkward, and we need to
# support them, so we define some constants to use later.
#
# TODO remove at RubyGems 4
#++

module Gem
  # :stopdoc:

  RubyGemsVersion = VERSION
  deprecate_constant(:RubyGemsVersion)

  RbConfigPriorities = %w[
    MAJOR
    MINOR
    TEENY
    EXEEXT RUBY_SO_NAME arch bindir datadir libdir ruby_install_name
    ruby_version rubylibprefix sitedir sitelibdir vendordir vendorlibdir
    rubylibdir
  ].freeze

  unless defined?(ConfigMap)
    ##
    # Configuration settings from ::RbConfig
    ConfigMap = Hash.new do |cm, key|
      cm[key] = RbConfig::CONFIG[key.to_s]
    end
    deprecate_constant(:ConfigMap)
  else
    RbConfigPriorities.each do |key|
      ConfigMap[key.to_sym] = RbConfig::CONFIG[key]
    end
  end

end