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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
38 lines
1.1 KiB
Ruby
Executable file
38 lines
1.1 KiB
Ruby
Executable file
#--
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# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
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# All rights reserved.
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# See LICENSE.txt for permissions.
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#++
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require 'rubygems'
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module Kernel
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alias gem_original_require require # :nodoc:
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#
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# We replace Ruby's require with our own, which is capable of
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# loading gems on demand.
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#
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# When you call <tt>require 'x'</tt>, this is what happens:
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# * If the file can be loaded from the existing Ruby loadpath, it
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# is.
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# * Otherwise, installed gems are searched for a file that matches.
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# If it's found in gem 'y', that gem is activated (added to the
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# loadpath).
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#
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# The normal <tt>require</tt> functionality of returning false if
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# that file has already been loaded is preserved.
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#
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def require(path) # :nodoc:
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gem_original_require path
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rescue LoadError => load_error
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if load_error.message =~ /\A[Nn]o such file to load -- #{Regexp.escape path}\z/ and
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spec = Gem.searcher.find(path) then
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Gem.activate(spec.name, false, "= #{spec.version}")
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gem_original_require path
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else
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raise load_error
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end
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end
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end # module Kernel
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