Support Ruby 4.0 (#25051)

Closes #25051

COPYBARA_INTEGRATE_REVIEW=#25051 from frederikspang:main 83f91c7
FUTURE_COPYBARA_INTEGRATE_REVIEW=#25051 from frederikspang:main 83f91c7
PiperOrigin-RevId: 853462400

Author: frederikspang

.github/workflows/test_ruby.yml

@@ -34,8 +34,9 @@ jobs:
           - { name: Ruby 3.1, ruby: ruby-3.1.6, ffi: FFI }
           - { name: Ruby 3.2, ruby: ruby-3.2.6, continuous-only: true }
           - { name: Ruby 3.3, ruby: ruby-3.3.6, continuous-only: true }
-          - { name: Ruby 3.4, ruby: ruby-3.4.1, ffi: NATIVE }
-          - { name: Ruby 3.4, ruby: ruby-3.4.1, ffi: FFI }
+          - { name: Ruby 3.4, ruby: ruby-3.4.1, continuous-only: true }
+          - { name: Ruby 4.0, ruby: ruby-4.0.0, ffi: NATIVE, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:8.0.1-ruby-4.0.0-1a1642a7cba0a7fa4c226c2d047ed5fbe6ca5451' }
+          - { name: Ruby 4.0, ruby: ruby-4.0.0, ffi: FFI, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:8.0.1-ruby-4.0.0-1a1642a7cba0a7fa4c226c2d047ed5fbe6ca5451' }
           - { name: JRuby 9.4, ruby: jruby-9.4.9.0, ffi: NATIVE }
           - { name: JRuby 9.4, ruby: jruby-9.4.9.0, ffi: FFI }
 
@@ -143,6 +144,8 @@ jobs:
         - { version: "3.3", continuous-only: true }
         - { version: "3.4", ffi: NATIVE }
         - { version: "3.4", ffi: FFI }
+        - { version: "4.0", ffi: NATIVE }
+        - { version: "4.0", ffi: FFI }
 
     name: ${{ matrix.continuous-only && inputs.continuous-prefix || '' }} MacOS Ruby ${{ matrix.version }}${{ matrix.ffi == 'FFI' && ' FFI' || '' }}
     runs-on: macos-14
@@ -155,7 +158,7 @@ jobs:
 
       - name: Pin Ruby version
         if: ${{ !matrix.continuous-only || inputs.continuous-run }}
-        uses: ruby/setup-ruby@4a9ddd6f338a97768b8006bf671dfbad383215f4 # v1.207.0
+        uses: ruby/setup-ruby@ae195bbe749a7cef685ac729197124a48305c1cb # v1.276.0
         with:
           ruby-version: ${{ matrix.version }}
 
@@ -184,8 +187,9 @@ jobs:
           - { name: Ruby 3.1, ruby: ruby-3.1.6, ffi: FFI }
           - { name: Ruby 3.2, ruby: ruby-3.2.6, continuous-only: true}
           - { name: Ruby 3.3, ruby: ruby-3.3.6, continuous-only: true}
-          - { name: Ruby 3.4, ruby: ruby-3.4.1, ffi: NATIVE }
-          - { name: Ruby 3.4, ruby: ruby-3.4.1, ffi: FFI, continuous-only: true }
+          - { name: Ruby 3.4, ruby: ruby-3.4.1, continuous-only: true }
+          - { name: Ruby 4.0, ruby: ruby-4.0.0, ffi: NATIVE, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:8.0.1-ruby-4.0.0-1a1642a7cba0a7fa4c226c2d047ed5fbe6ca5451' }
+          - { name: Ruby 4.0, ruby: ruby-4.0.0, ffi: FFI, image: 'us-docker.pkg.dev/protobuf-build/containers/test/linux/ruby:8.0.1-ruby-4.0.0-1a1642a7cba0a7fa4c226c2d047ed5fbe6ca5451' }
           - { name: JRuby 9.4, ruby: jruby-9.4.9.0, ffi: NATIVE }
           - { name: JRuby 9.4, ruby: jruby-9.4.9.0, ffi: FFI, continuous-only: true }
     name: ${{ matrix.continuous-only && inputs.continuous-prefix || '' }} Install ${{ matrix.name }}${{ matrix.ffi == 'FFI' && ' FFI' || '' }}
@@ -209,6 +213,7 @@ jobs:
             ./regenerate_stale_files.sh $BAZEL_FLAGS;
             bazel build //ruby:release //:protoc ${{ matrix.ffi == 'FFI' && '--//ruby:ffi=enabled' || '' }} $BAZEL_FLAGS;
             gem install bazel-bin/ruby/google-protobuf-*;
+            find /usr/local/rvm/gems/ruby-4.0.0/gems/google-protobuf-4.34.0/ -ls;
             bazel-bin/protoc --proto_path=src --proto_path=ruby/tests --proto_path=ruby --ruby_out=ruby tests/test_import_proto2.proto;
             bazel-bin/protoc --proto_path=src --proto_path=ruby/tests --proto_path=ruby --ruby_out=ruby tests/basic_test.proto;
             ${{ matrix.ffi == 'FFI' && 'PROTOCOL_BUFFERS_RUBY_IMPLEMENTATION=FFI' || '' }} ruby ruby/tests/basic.rb;

ruby/tests/repeated_field_test.rb

@@ -29,6 +29,9 @@ def test_acts_like_an_array
     arr_methods -= [:intersect?]
     # ruby 3.4 methods we ignore
     arr_methods -= [:fetch_values]
+    # ruby 4.0 methods we ignore
+    arr_methods -= [:rfind]
+
     arr_methods.each do |method_name|
       assert_respond_to m.repeated_string, method_name
     end