Extended maintenance of Ruby versions 1.8.7 and 1.9.2 ended on July 31, 2014. Read more
Object
GemPathSearcher has the capability to find loadable files inside gems. It generates data up front to speed up searches later.
Initialise the data we need to make searches later.
# File rubygems/gem_path_searcher.rb, line 10 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.
# File rubygems/gem_path_searcher.rb, line 44 def find(path) @gemspecs.find do |spec| matching_file? spec, path end end
Works like find, but finds
all gemspecs matching path
.
# File rubygems/gem_path_searcher.rb, line 51 def find_all(path) @gemspecs.select do |spec| matching_file? spec, path end end
Return a list of all installed gemspecs, sorted by alphabetical order and in reverse version order. (bar-2, bar-1, foo-2)
# File rubygems/gem_path_searcher.rb, line 80 def init_gemspecs specs = Gem.source_index.map { |_, spec| spec } specs.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}'
# File rubygems/gem_path_searcher.rb, line 94 def lib_dirs_for(spec) "#{spec.full_gem_path}/{#{spec.require_paths.join(',')}}" if spec.require_paths end
Attempts to find a matching path using the require_paths of the given
spec
.
# File rubygems/gem_path_searcher.rb, line 61 def matching_file?(spec, path) !matching_files(spec, path).empty? end
Returns files matching path
in spec
.
# File rubygems/gem_path_searcher.rb, line 70 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