protobuf-27.0

[Bruce Dubbs]

New major version.

[Xi Ruoyao]

-Dprotobuf_BUILD_LIBUPB=OFF is needed to avoid installing useless static libraries.

[Bruce Dubbs]

Protocol Buffers v27.0

Compiler

• Future-proof edition 2023 against feature value support windows.
• Mark deleted fields in descriptor.proto reserved
• Add extension declarations for known features.
• Refactored the Java generator into separate packages and targets.
• Officially release Editions in 27.0.
• Define lifetimes of edition 2023 features
• Implement feature lifetime validation in protoc and the C++ runtime.
• Add edition lifetime options for feature specs.
• Enable editions support for Java Lite.
• Release edition defaults CLI arguments.
• Update protoc release to include editions language features protos for Java and C++

C++

• Future-proof edition 2023 against feature value support windows.
• Prohibit using features in the same file they're defined in.
• Fix validation checks of implicit presence.
• Clarify map behaviors in editions.
• Ensure we allocate overaligned types with aligned operator new.
• Fix text-format delimited field handling.
• In debug mode, after clearing oneof messages on arenas, poison them if ASAN.
• Allow string_type for Edition 2023.
• Breaking change: Ensure we allocate overaligned types with aligned operator new.
• Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set
• Move java_features.proto to java/core/srce/main/resources
• Add an RAII namespace printer helper for C++ codegen.
• Enable editions support for Java Lite.
• Add an RAII ifndef helper for C++ codegen.
• Clear oneof message fields even on arena on non-OPT builds.
• Implement edition 2023 support in all Ruby runtimes.
• Release edition defaults CLI arguments.
• Deprecate Arena::CreateMessage for OSS.
• Open sourcing reflection_visit_fieds.
• Fixed the use of c++ keywords within namespace names
• Fix pkg-config metadata for shared abseil on windows
• Add GetStringView() and GetRepeatedStringView() with scratch.
• Avoid a 'may be used uninitialized' warning when built with '-c opt'.
• Add software prefetch to ByteSizeLong
• Add prefetching in arena blocks.
• Rename the includingDefaultValueWithoutPresenceFields and always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the C++, Py and Java JSON serializers for consistency.
• Remove tags for arena cleanup nodes now that we have dedicated string cleanup blocks.
• Avoid unused-parameter warning in field accessor listeners.
• Add new always_print_without_presence_fields option to the C++ JSON serializer.
• Fail to build descriptor if ctype is specified for non string/bytes fields
• Check ctype() in DescriptorBuilder for edition 2023 and beyond.
• Fail building descriptors if ctype is used for fields other than string or bytes.
• Fix generation of HasExtension and ExtensionSize functions to restrict to the
• Add the privacy manifest to the C++ CocoaPod.

Java

• Lazily resolve features for proto2 and proto3 for compatibility with old open source gencode that does not invoke feature resolution from gencode static init.
• Add java to reserved names to escape extensions to java_. This may break existing references to gencode for extensions named java.
• Deprecate building from source with Maven to be removed in 4.28.x.
• Split bootstrapped java_features.proto to keep it from leaking out.
• Refactored the Java generator into separate packages and targets.
• Define lifetimes of edition 2023 features
• Check that size is non-negative when reading string or bytes in StreamDecoder.
• Fix text-format delimited field handling
• Move java_features.proto to java/core/srce/main/resources
• Add java_features.proto to kotlin_mvn release
• Enable editions support for Java Lite.
• Fix descriptor to access type via getType() s.t. messages using delimited encoding are consistently treated as groups for Java lite.
• Make UnsafeByteOperations stable; removing experimental annotation.
• Fix features inheritance of oneof fields and extensions and fix/move unit tests to actually run.
• Add software prefetch to ByteSizeLong
• Rename the includingDefaultValueWithoutPresenceFields and always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the C++, Py and Java JSON serializers for consistency.
• Add a new includingDefaultValueWithoutPresenceFields option to the Java parser which is intended to replace the current includingDefaultValueFields.

Kotlin

• Add java_features.proto to kotlin_mvn release

Csharp

• Regenerate stale files
• Optimize JSON parsing in JsonTokenizer.
• Avoid string concatenation when looking up enum values by name.
• Cache StringBuilder instances in the .NET JsonTextTokenizer.
• Enable Editions in the C# generator.
• Runtime support for Protobuf Editions in C#.
• Tweak "group to property name" mapping for C#. Under editions, where fields using a delimited encoding have independent field names from type names, we want to use the specified field name.
• Ignore invalid enum string values in JSON, when invalid fields are being ignored.

Objective-C

• Optimize startup be reducing selector lookup.
• Add the privacy manifest to the ObjC CocoaPod.

Python

• Add temporary alias for system_python.bzl at previous location.
• Implement feature lifetime validation in protoc and the C++ runtime.
• Fix text-format delimited field handling
• Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set
• Fix upb python: DO NOT create empty optional field after sorting empty repeated field
• Enable Protobuf Python version check.
• Register Scalar/MessageMapContainerTypes as virtual subclasses of MutableMapping instead of inheriting directly.
• Rename the includingDefaultValueWithoutPresenceFields and always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the C++, Py and Java JSON serializers for consistency.
• Add new including_default_value_without_presence_fields to Python JSON serializer.
• Adhere to PEP 8

PHP

• Don't break the trace
• Fix inconsistent timestamp json encode/decode
• Feat: more readable phpdoc escaping

PHP C-Extension

• Regenerate stale files
• See also UPB changes below, which may affect PHP C-Extension.

Ruby

• Add bigdecimal to dependencies
• Implement service & method descriptor lookup in Ruby
• Implement edition 2023 support in all Ruby runtimes.
• Ruby implement memsize functions for native types
• Moved ObjectCache into an internal module.
• [Ruby] Delegate difference, intersection, union from RepeatedField to Array
• Move the RubyMessage.java JSON "include defaults" to use alwaysPrintFieldsWithNoPresence.
• Increased the size of the error message buffer by 4x, to 511 bytes.

Ruby C-Extension

• Regenerate stale files
• Implement service & method descriptor lookup in Ruby
• Implement edition 2023 support in all Ruby runtimes.
• Ruby implement memsize functions for native types
• Moved ObjectCache into an internal module.
• See also UPB changes below, which may affect Ruby C-Extension.

UPB (Python/PHP/Ruby C-Extension)

• Regenerate stale files
• Setup upb installation with cmake.
• Fix text-format delimited field handling
• Print non-extension fields by field number order instead of .proto file order.
• Implement service & method descriptor lookup in Ruby
• Implement edition 2023 support in all Ruby runtimes.
• Adds mutable extension accessors to the codegen for upb C for getting mutable extension messages.
• Ruby implement memsize functions for native types
• Increased the size of the error message buffer by 4x, to 511 bytes.

Other

• MODULE.bazel fixes for protobuf BCR release.
• Fix whitespace merge issue in gencode
• Work around windows path length limitations by moving immutable -> full in open source (new generator paths) and shortening long file names.
• Move the windows path length workarounds out of protobuf-ci
• Update src/file_lists.cmake for staleness
• Add system_python to protobuf_deps.bzl.
• Migrate bazel tests to protobuf-ci.
• Fix bazel cache issues in 7.0.0
• Add redirects for C++ and Java proto rules
• Add redirects for proto rules
• Feat: automate publishing releases to Bazel Central Registry
• Add PrivacyInfo.xcprivacy

[Bruce Dubbs]

Fixed at commits 14c7719763 and 48a4274dbe.