1 files changed, 9 insertions, 58 deletions

diff --git a/lib/bundler/rubygems_ext.rb b/lib/bundler/rubygems_ext.rb
index ccf71c8c00..96b93836c7 100644
--- a/lib/bundler/rubygems_ext.rb
+++ b/lib/bundler/rubygems_ext.rb
@@ -4,40 +4,25 @@ require "pathname"
 
 require "rubygems/specification"
 
-begin
-  # Possible use in Gem::Specification#source below and require
-  # shouldn't be deferred.
-  require "rubygems/source"
-rescue LoadError
-  # Not available before RubyGems 2.0.0, ignore
-  nil
-end
+# Possible use in Gem::Specification#source below and require
+# shouldn't be deferred.
+require "rubygems/source"
 
-require "bundler/match_platform"
+require_relative "match_platform"
 
 module Gem
-  @loaded_stacks = Hash.new {|h, k| h[k] = [] }
-
   class Specification
     attr_accessor :remote, :location, :relative_loaded_from
 
-    if instance_methods(false).include?(:source)
-      remove_method :source
-      attr_writer :source
-      def source
-        (defined?(@source) && @source) || Gem::Source::Installed.new
-      end
-    else
-      # rubocop:disable Lint/DuplicateMethods
-      attr_accessor :source
-      # rubocop:enable Lint/DuplicateMethods
+    remove_method :source
+    attr_writer :source
+    def source
+      (defined?(@source) && @source) || Gem::Source::Installed.new
     end
 
     alias_method :rg_full_gem_path, :full_gem_path
     alias_method :rg_loaded_from,   :loaded_from
 
-    attr_writer :full_gem_path unless instance_methods.include?(:full_gem_path=)
-
     def full_gem_path
       # this cannot check source.is_a?(Bundler::Plugin::API::Source)
       # because that _could_ trip the autoload, and if there are unresolved
@@ -59,15 +44,7 @@ module Gem
     end
 
     def load_paths
-      return full_require_paths if respond_to?(:full_require_paths)
-
-      require_paths.map do |require_path|
-        if require_path.include?(full_gem_path)
-          require_path
-        else
-          File.join(full_gem_path, require_path)
-        end
-      end
+      full_require_paths
     end
 
     if method_defined?(:extension_dir)
@@ -151,32 +128,6 @@ module Gem
       end
       out
     end
-
-    # Backport of performance enhancement added to RubyGems 1.4
-    def matches_spec?(spec)
-      # name can be a Regexp, so use ===
-      return false unless name === spec.name
-      return true  if requirement.none?
-
-      requirement.satisfied_by?(spec.version)
-    end unless allocate.respond_to?(:matches_spec?)
-  end
-
-  class Requirement
-    # Backport of performance enhancement added to RubyGems 1.4
-    def none?
-      # note that it might be tempting to replace with with RubyGems 2.0's
-      # improved implementation. Don't. It requires `DefaultRequirement` to be
-      # defined, and more importantantly, these overrides are not used when the
-      # running RubyGems defines these methods
-      to_s == ">= 0"
-    end unless allocate.respond_to?(:none?)
-
-    # Backport of performance enhancement added to RubyGems 2.2
-    def exact?
-      return false unless @requirements.size == 1
-      @requirements[0][0] == "="
-    end unless allocate.respond_to?(:exact?)
   end
 
   class Platform