Fix RubyGems 2.2+ compatibility.

RubyGems since version 2.2 allows to reconfigure place, where binary
extensions are stored. This might allow easier sharing of gems between
various Ruby interpreters. It can be enabled by redefining
Gem.default_ext_dir_for method.

This patch is adding support for this feature into Bundler.

1 files changed, 16 insertions, 4 deletions

diff --git a/lib/bundler/shared_helpers.rb b/lib/bundler/shared_helpers.rb
index 0a6435eaa3..0a5b3ea2c8 100644
--- a/lib/bundler/shared_helpers.rb
+++ b/lib/bundler/shared_helpers.rb
@@ -98,10 +98,22 @@ module Bundler
       # handle 1.9 where system gems are always on the load path
       if defined?(::Gem)
         me = File.expand_path("../../", __FILE__)
-        $LOAD_PATH.reject! do |p|
-          next if File.expand_path(p) =~ /^#{Regexp.escape(me)}/
-          p != File.dirname(__FILE__) &&
-            Bundler.rubygems.gem_path.any?{|gp| p =~ /^#{Regexp.escape(gp)}/ }
+
+        # RubyGems 2.2+ can put binary extension into dedicated folders,
+        # therefore use RubyGems facilities to obtain their load paths.
+        if Gem::Specification.method_defined? :full_require_paths
+          loaded_gem_paths = Gem.loaded_specs.map do |n, s|
+            s.full_require_paths.none? {|path| File.expand_path(path) =~ /^#{Regexp.escape(me)}/} ? s.full_require_paths : []
+          end
+          loaded_gem_paths.flatten!
+
+          $LOAD_PATH.reject! {|p| loaded_gem_paths.delete(p) }
+        else
+          $LOAD_PATH.reject! do |p|
+            next if File.expand_path(p) =~ /^#{Regexp.escape(me)}/
+            p != File.dirname(__FILE__) &&
+              Bundler.rubygems.gem_path.any?{|gp| p =~ /^#{Regexp.escape(gp)}/ }
+          end
         end
         $LOAD_PATH.uniq!
       end