[rubygems/rubygems] Upstream RubyGems changes from TruffleRuby

rubygems/rubygems@749a508968

lib/rubygems.rb

@@ -1337,6 +1337,17 @@ def default_gem_load_paths
 rescue LoadError
 end
 
+# TruffleRuby >= 24 defines REUSE_AS_BINARY_ON_TRUFFLERUBY in defaults/truffleruby.
+# However, TruffleRuby < 24 defines REUSE_AS_BINARY_ON_TRUFFLERUBY directly in its copy
+# of lib/rubygems/platform.rb, so it is not defined if RubyGems is updated (gem update --system).
+# Instead, we define it here in that case, similar to bundler/lib/bundler/rubygems_ext.rb.
+# We must define it here and not in platform.rb because platform.rb is loaded before defaults/truffleruby.
+class Gem::Platform
+  if RUBY_ENGINE == "truffleruby" && !defined?(REUSE_AS_BINARY_ON_TRUFFLERUBY)
+    REUSE_AS_BINARY_ON_TRUFFLERUBY = %w[libv8 libv8-node sorbet-static].freeze
+  end
+end
+
 ##
 # Loads the default specs.
 Gem::Specification.load_defaults

lib/rubygems/platform.rb

@@ -43,10 +43,20 @@ def self.match_spec?(spec)
     match_gem?(spec.platform, spec.name)
   end
 
-  def self.match_gem?(platform, gem_name)
-    # NOTE: this method might be redefined by Ruby implementations to
-    # customize behavior per RUBY_ENGINE, gem_name or other criteria.
-    match_platforms?(platform, Gem.platforms)
+  if RUBY_ENGINE == "truffleruby"
+    def self.match_gem?(platform, gem_name)
+      raise "Not a string: #{gem_name.inspect}" unless String === gem_name
+
+      if REUSE_AS_BINARY_ON_TRUFFLERUBY.include?(gem_name)
+        match_platforms?(platform, [Gem::Platform::RUBY, Gem::Platform.local])
+      else
+        match_platforms?(platform, Gem.platforms)
+      end
+    end
+  else
+    def self.match_gem?(platform, gem_name)
+      match_platforms?(platform, Gem.platforms)
+    end
   end
 
   def self.sort_priority(platform)