gem_openssl.rb

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#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++


# Some system might not have OpenSSL installed, therefore the core
# library file openssl might not be available.  We localize testing
# for the presence of OpenSSL in this file.

module Gem
  class << self
    # Is SSL (used by the signing commands) available on this
    # platform?
    def ssl_available?
      require 'rubygems/gem_openssl'
      @ssl_available
    end
    
    # Set the value of the ssl_avilable flag.
    attr_writer :ssl_available
    
    # Ensure that SSL is available.  Throw an exception if it is not.
    def ensure_ssl_available
      unless ssl_available?
	fail Gem::Exception, "SSL is not installed on this system"
      end
    end
  end
end

begin
  require 'openssl'

  # Reference a constant defined in the .rb portion of ssl (just to
  # make sure that part is loaded too).

  dummy = OpenSSL::Digest::SHA1

  Gem.ssl_available = true
rescue LoadError
  Gem.ssl_available = false
rescue
  Gem.ssl_available = false
end