Current File : //opt/alt/ruby19/lib64/ruby/1.9.1/rubygems/custom_require.rb
#--
# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
# All rights reserved.
# See LICENSE.txt for permissions.
#++
module Kernel
if defined?(gem_original_require) then
# Ruby ships with a custom_require, override its require
remove_method :require
else
##
# The Kernel#require from before RubyGems was loaded.
alias gem_original_require require
private :gem_original_require
end
##
# When RubyGems is required, Kernel#require is replaced with our own which
# is capable of loading gems on demand.
#
# When you call <tt>require 'x'</tt>, this is what happens:
# * If the file can be loaded from the existing Ruby loadpath, it
# is.
# * Otherwise, installed gems are searched for a file that matches.
# If it's found in gem 'y', that gem is activated (added to the
# loadpath).
#
# The normal <tt>require</tt> functionality of returning false if
# that file has already been loaded is preserved.
def require path
if Gem.unresolved_deps.empty? then
gem_original_require path
else
spec = Gem::Specification.find { |s|
s.activated? and s.contains_requirable_file? path
}
unless spec then
found_specs = Gem::Specification.find_in_unresolved path
unless found_specs.empty? then
found_specs = [found_specs.last]
else
found_specs = Gem::Specification.find_in_unresolved_tree path
end
found_specs.each do |found_spec|
found_spec.activate
end
end
return gem_original_require path
end
rescue LoadError => load_error
if load_error.message.start_with?("Could not find") or
(load_error.message.end_with?(path) and Gem.try_activate(path)) then
return gem_original_require(path)
end
raise load_error
end
private :require
end