Fresh start

1 files changed, 59 insertions, 0 deletions

diff --git a/jni/ruby/lib/rubygems/compatibility.rb b/jni/ruby/lib/rubygems/compatibility.rb
new file mode 100644
index 0000000..6a00a19
--- /dev/null
+++ b/jni/ruby/lib/rubygems/compatibility.rb
@@ -0,0 +1,59 @@
+# :stopdoc:
+
+#--
+# This file contains all sorts of little compatibility hacks that we've
+# had to introduce over the years. Quarantining them into one file helps
+# us know when we can get rid of them.
+#
+# Ruby 1.9.x has introduced some things that are awkward, and we need to
+# support them, so we define some constants to use later.
+#++
+module Gem
+  # Only MRI 1.9.2 has the custom prelude.
+  GEM_PRELUDE_SUCKAGE = RUBY_VERSION =~ /^1\.9\.2/ and RUBY_ENGINE == "ruby"
+end
+
+# Gem::QuickLoader exists in the gem prelude code in ruby 1.9.2 itself.
+# We gotta get rid of it if it's there, before we do anything else.
+if Gem::GEM_PRELUDE_SUCKAGE and defined?(Gem::QuickLoader) then
+  Gem::QuickLoader.remove
+
+  $LOADED_FEATURES.delete Gem::QuickLoader.path_to_full_rubygems_library
+
+  if path = $LOADED_FEATURES.find {|n| n.end_with? '/rubygems.rb'} then
+    raise LoadError, "another rubygems is already loaded from #{path}"
+  end
+
+  class << Gem
+    remove_method :try_activate if Gem.respond_to?(:try_activate, true)
+  end
+end
+
+module Gem
+  RubyGemsVersion = VERSION
+
+  # TODO remove at RubyGems 3
+
+  RbConfigPriorities = %w[
+    MAJOR
+    MINOR
+    TEENY
+    EXEEXT RUBY_SO_NAME arch bindir datadir libdir ruby_install_name
+    ruby_version rubylibprefix sitedir sitelibdir vendordir vendorlibdir
+    rubylibdir
+  ]
+
+  unless defined?(ConfigMap)
+    ##
+    # Configuration settings from ::RbConfig
+    ConfigMap = Hash.new do |cm, key| # TODO remove at RubyGems 3
+      cm[key] = RbConfig::CONFIG[key.to_s]
+    end
+  else
+    RbConfigPriorities.each do |key|
+      ConfigMap[key.to_sym] = RbConfig::CONFIG[key]
+    end
+  end
+
+  RubyGemsPackageVersion = VERSION
+end