extconf.rb code for ruby_core_source

gistfile1.txt

if RUBY_VERSION >= "1.9" and RUBY_VERSION <= "2.0"
  begin
    require "ruby_core_source"
  rescue LoadError
    require 'rubygems/user_interaction' # for 1.9.1
    require 'rubygems/dependency_installer'
    installer = Gem::DependencyInstaller.new
    installer.install 'ruby_core_source'

    Gem.refresh
    Gem::Specification.find_by_name('ruby_core_source').activate # for 1.9.1

    require "ruby_core_source"
  end
end