2011-05-31 23:45:05 -04:00
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require "rubygems"
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require "rubygems/deprecate"
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2008-09-25 06:13:50 -04:00
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##
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2007-11-10 02:48:56 -05:00
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# GemPathSearcher has the capability to find loadable files inside
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# gems. It generates data up front to speed up searches later.
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2008-09-25 06:13:50 -04:00
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2007-11-10 02:48:56 -05:00
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class Gem::GemPathSearcher
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##
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# Initialise the data we need to make searches later.
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def initialize
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# We want a record of all the installed gemspecs, in the order we wish to
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# examine them.
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2011-03-01 04:41:32 -05:00
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# TODO: remove this stupid method
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@gemspecs = init_gemspecs
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# Map gem spec to glob of full require_path directories. Preparing this
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# information may speed up searches later.
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@lib_dirs = {}
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@gemspecs.each do |spec|
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@lib_dirs[spec.object_id] = lib_dirs_for spec
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end
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end
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2008-09-25 06:13:50 -04:00
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##
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# Look in all the installed gems until a matching +glob+ is found.
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# Return the _gemspec_ of the gem where it was found. If no match
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# is found, return nil.
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#
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# The gems are searched in alphabetical order, and in reverse
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# version order.
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#
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# For example:
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#
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# find('log4r') # -> (log4r-1.1 spec)
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# find('log4r.rb') # -> (log4r-1.1 spec)
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# find('rake/rdoctask') # -> (rake-0.4.12 spec)
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# find('foobarbaz') # -> nil
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#
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# Matching paths can have various suffixes ('.rb', '.so', and
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# others), which may or may not already be attached to _file_.
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# This method doesn't care about the full filename that matches;
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# only that there is a match.
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def find(glob)
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# HACK violation of encapsulation
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@gemspecs.find do |spec|
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# TODO: inverted responsibility
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matching_file? spec, glob
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end
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end
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# Looks through the available gemspecs and finds the first
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# one that contains +file+ as a requirable file.
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def find_spec_for_file(file)
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@gemspecs.find do |spec|
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return spec if spec.contains_requirable_file?(file)
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end
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end
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2011-03-09 17:32:29 -05:00
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def find_active(glob)
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# HACK violation of encapsulation
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@gemspecs.find do |spec|
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# TODO: inverted responsibility
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spec.loaded? and matching_file? spec, glob
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end
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end
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2008-09-25 06:13:50 -04:00
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##
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# Works like #find, but finds all gemspecs matching +glob+.
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def find_all(glob)
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# HACK violation of encapsulation
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@gemspecs.select do |spec|
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# TODO: inverted responsibility
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matching_file? spec, glob
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end || []
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end
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def find_in_unresolved(glob)
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# HACK violation
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specs = Gem.unresolved_deps.values.map { |dep|
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Gem.source_index.search dep, true
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}.flatten
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specs.select do |spec|
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# TODO: inverted responsibility
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matching_file? spec, glob
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end || []
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end
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def find_in_unresolved_tree glob
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# HACK violation
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# TODO: inverted responsibility
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specs = Gem.unresolved_deps.values.map { |dep|
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Gem.source_index.search dep, true
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}.flatten
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specs.reverse_each do |spec|
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trails = matching_paths(spec, glob)
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next if trails.empty?
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return trails.map(&:reverse).sort.first.reverse
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end
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[]
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end
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2008-09-25 06:13:50 -04:00
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##
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# Attempts to find a matching path using the require_paths of the given
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# +spec+.
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def matching_file?(spec, path)
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not matching_files(spec, path).empty?
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end
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def matching_paths(spec, path)
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trails = []
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spec.traverse do |from_spec, dep, to_spec, trail|
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next unless to_spec.conflicts.empty?
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trails << trail unless matching_files(to_spec, path).empty?
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end
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trails
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end
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##
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# Returns files matching +path+ in +spec+.
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#--
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# Some of the intermediate results are cached in @lib_dirs for speed.
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def matching_files(spec, path)
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return [] unless @lib_dirs[spec.object_id] # case no paths
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glob = File.join @lib_dirs[spec.object_id], "#{path}#{Gem.suffix_pattern}"
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Dir[glob].select { |f| File.file? f.untaint }
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end
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2008-09-25 06:13:50 -04:00
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##
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# Return a list of all installed gemspecs, sorted by alphabetical order and
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2009-06-09 17:38:59 -04:00
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# in reverse version order. (bar-2, bar-1, foo-2)
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2008-09-25 06:13:50 -04:00
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def init_gemspecs
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Gem::Specification.sort { |a, b|
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names = a.name <=> b.name
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next names if names.nonzero?
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b.version <=> a.version
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}
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end
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2008-09-25 06:13:50 -04:00
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##
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# Returns library directories glob for a gemspec. For example,
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# '/usr/local/lib/ruby/gems/1.8/gems/foobar-1.0/{lib,ext}'
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def lib_dirs_for(spec)
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"#{spec.full_gem_path}/{#{spec.require_paths.join(',')}}" if
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spec.require_paths
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2007-11-10 02:48:56 -05:00
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end
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2011-05-31 23:45:05 -04:00
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extend Deprecate
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2007-11-10 02:48:56 -05:00
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2011-05-31 23:45:05 -04:00
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deprecate :initialize, :none, 2011, 10
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deprecate :find, :none, 2011, 10
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deprecate :find_active, :none, 2011, 10
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deprecate :find_all, :none, 2011, 10
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deprecate :find_in_unresolved, :none, 2011, 10
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deprecate :find_in_unresolved_tree, :none, 2011, 10
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deprecate :find_spec_for_file, :none, 2011, 10
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end
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