JezK
Edit File: gem_path_searcher.rb
require "rubygems" require "rubygems/deprecate" ## # 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. # TODO: remove this stupid method @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 +glob+ 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(glob) # HACK violation of encapsulation @gemspecs.find do |spec| # TODO: inverted responsibility matching_file? spec, glob end end # Looks through the available gemspecs and finds the first # one that contains +file+ as a requirable file. def find_spec_for_file(file) @gemspecs.find do |spec| return spec if spec.contains_requirable_file?(file) end end def find_active(glob) # HACK violation of encapsulation @gemspecs.find do |spec| # TODO: inverted responsibility spec.loaded? and matching_file? spec, glob end end ## # Works like #find, but finds all gemspecs matching +glob+. def find_all(glob) # HACK violation of encapsulation @gemspecs.select do |spec| # TODO: inverted responsibility matching_file? spec, glob end || [] end def find_in_unresolved(glob) # HACK violation specs = Gem.unresolved_deps.values.map { |dep| Gem.source_index.search dep, true }.flatten specs.select do |spec| # TODO: inverted responsibility matching_file? spec, glob end || [] end def find_in_unresolved_tree glob # HACK violation # TODO: inverted responsibility specs = Gem.unresolved_deps.values.map { |dep| Gem.source_index.search dep, true }.flatten specs.reverse_each do |spec| trails = matching_paths(spec, glob) next if trails.empty? return trails.map(&:reverse).sort.first.reverse end [] end ## # Attempts to find a matching path using the require_paths of the given # +spec+. def matching_file?(spec, path) not matching_files(spec, path).empty? end def matching_paths(spec, path) trails = [] spec.traverse do |from_spec, dep, to_spec, trail| next unless to_spec.conflicts.empty? trails << trail unless matching_files(to_spec, path).empty? end trails end ## # Returns files matching +path+ in +spec+. #-- # Some of the intermediate results are cached in @lib_dirs for speed. def matching_files(spec, path) return [] unless @lib_dirs[spec.object_id] # case no paths glob = File.join @lib_dirs[spec.object_id], "#{path}#{Gem.suffix_pattern}" Dir[glob].select { |f| File.file? f.untaint } end ## # Return a list of all installed gemspecs, sorted by alphabetical order and # in reverse version order. (bar-2, bar-1, foo-2) def init_gemspecs Gem::Specification.sort { |a, b| names = a.name <=> b.name next names if names.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(',')}}" if spec.require_paths end extend Gem::Deprecate deprecate :initialize, :none, 2011, 10 deprecate :find, :none, 2011, 10 deprecate :find_active, :none, 2011, 10 deprecate :find_all, :none, 2011, 10 deprecate :find_in_unresolved, :none, 2011, 10 deprecate :find_in_unresolved_tree, :none, 2011, 10 deprecate :find_spec_for_file, :none, 2011, 10 end