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Diffstat (limited to 'trunk/lib/rubygems/gem_path_searcher.rb')
-rw-r--r-- | trunk/lib/rubygems/gem_path_searcher.rb | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/trunk/lib/rubygems/gem_path_searcher.rb b/trunk/lib/rubygems/gem_path_searcher.rb deleted file mode 100644 index dadad66289..0000000000 --- a/trunk/lib/rubygems/gem_path_searcher.rb +++ /dev/null @@ -1,84 +0,0 @@ -#-- -# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others. -# All rights reserved. -# See LICENSE.txt for permissions. -#++ - -require 'rubygems' - -# -# GemPathSearcher has the capability to find loadable files inside -# gems. It generates data up front to speed up searches later. -# -class Gem::GemPathSearcher - - # - # Initialise the data we need to make searches later. - # - def initialize - # We want a record of all the installed gemspecs, in the order - # we wish to examine them. - @gemspecs = init_gemspecs - # Map gem spec to glob of full require_path directories. - # Preparing this information may speed up searches later. - @lib_dirs = {} - @gemspecs.each do |spec| - @lib_dirs[spec.object_id] = lib_dirs_for(spec) - end - end - - # - # Look in all the installed gems until a matching _path_ is found. - # Return the _gemspec_ of the gem where it was found. If no match - # is found, return nil. - # - # The gems are searched in alphabetical order, and in reverse - # version order. - # - # For example: - # - # find('log4r') # -> (log4r-1.1 spec) - # find('log4r.rb') # -> (log4r-1.1 spec) - # find('rake/rdoctask') # -> (rake-0.4.12 spec) - # find('foobarbaz') # -> nil - # - # Matching paths can have various suffixes ('.rb', '.so', and - # others), which may or may not already be attached to _file_. - # This method doesn't care about the full filename that matches; - # only that there is a match. - # - def find(path) - @gemspecs.each do |spec| - return spec if matching_file(spec, path) - end - nil - end - - private - - # Attempts to find a matching path using the require_paths of the - # given _spec_. - # - # Some of the intermediate results are cached in @lib_dirs for - # speed. - def matching_file(spec, path) # :doc: - glob = File.join @lib_dirs[spec.object_id], "#{path}#{Gem.suffix_pattern}" - return true unless Dir[glob].select { |f| File.file?(f.untaint) }.empty? - end - - # Return a list of all installed gemspecs, sorted by alphabetical - # order and in reverse version order. - def init_gemspecs - Gem.source_index.map { |_, spec| spec }.sort { |a,b| - (a.name <=> b.name).nonzero? || (b.version <=> a.version) - } - end - - # Returns library directories glob for a gemspec. For example, - # '/usr/local/lib/ruby/gems/1.8/gems/foobar-1.0/{lib,ext}' - def lib_dirs_for(spec) - "#{spec.full_gem_path}/{#{spec.require_paths.join(',')}}" - end - -end - |