Breaking change: make generator headers private

#test-continuous

These built-in generators are exposed in the protoc binary we release.  Using them as libraries would typically be done by someone creating a custom build of protoc mixing our generators with their own.  The supported alternative would be to build your generator as a plugin binary, and use it with the normal protoc binary.

PiperOrigin-RevId: 857982672

Author: mkruskal-google

cmake/installed_include_golden.txt

@@ -12,11 +12,9 @@ google/protobuf/arenaz_sampler.h
 google/protobuf/compiler/code_generator.h
 google/protobuf/compiler/code_generator_lite.h
 google/protobuf/compiler/command_line_interface.h
-google/protobuf/compiler/cpp/generator.h
 google/protobuf/compiler/cpp/helpers.h
 google/protobuf/compiler/cpp/names.h
 google/protobuf/compiler/cpp/options.h
-google/protobuf/compiler/csharp/csharp_generator.h
 google/protobuf/compiler/csharp/names.h
 google/protobuf/compiler/importer.h
 google/protobuf/compiler/java/doc_comment.h
@@ -26,22 +24,16 @@ google/protobuf/compiler/java/java_features.pb.h
 google/protobuf/compiler/java/name_resolver.h
 google/protobuf/compiler/java/names.h
 google/protobuf/compiler/java/options.h
-google/protobuf/compiler/kotlin/generator.h
 google/protobuf/compiler/notices.h
-google/protobuf/compiler/objectivec/generator.h
 google/protobuf/compiler/objectivec/line_consumer.h
 google/protobuf/compiler/objectivec/names.h
 google/protobuf/compiler/objectivec/nsobject_methods.h
 google/protobuf/compiler/parser.h
 google/protobuf/compiler/php/names.h
-google/protobuf/compiler/php/php_generator.h
 google/protobuf/compiler/plugin.h
 google/protobuf/compiler/plugin.pb.h
 google/protobuf/compiler/plugin.proto
-google/protobuf/compiler/python/generator.h
-google/protobuf/compiler/python/pyi_generator.h
 google/protobuf/compiler/retention.h
-google/protobuf/compiler/ruby/ruby_generator.h
 google/protobuf/compiler/scc.h
 google/protobuf/compiler/subprocess.h
 google/protobuf/compiler/versions.h

pkg/BUILD.bazel

@@ -229,15 +229,6 @@ cc_dist_library(
         "//src/google/protobuf/compiler/java:names",
         "//src/google/protobuf/compiler/objectivec:names",
         "//src/google/protobuf/compiler/php:names",
-        # TODO Make these private in the next breaking C++ release.
-        "//src/google/protobuf/compiler/cpp:generator_headers",
-        "//src/google/protobuf/compiler/csharp:generator_headers",
-        "//src/google/protobuf/compiler/java:generator_headers",
-        "//src/google/protobuf/compiler/kotlin:generator_headers",
-        "//src/google/protobuf/compiler/objectivec:generator_headers",
-        "//src/google/protobuf/compiler/php:php_generator",
-        "//src/google/protobuf/compiler/python:generator_headers",
-        "//src/google/protobuf/compiler/ruby:generator_headers",
     ],
 )
 

src/google/protobuf/compiler/cpp/BUILD.bazel

@@ -33,20 +33,6 @@ cc_library(
     ],
 )
 
-cc_library(
-    name = "generator_headers",
-    hdrs = ["generator.h"],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-        "@abseil-cpp//absl/status",
-        "@abseil-cpp//absl/strings",
-    ],
-)
-
 cc_library(
     name = "names_internal",
     srcs = [

src/google/protobuf/compiler/csharp/BUILD.bazel

@@ -20,18 +20,6 @@ cc_library(
     ],
 )
 
-cc_library(
-    name = "generator_headers",
-    hdrs = ["csharp_generator.h"],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-    ],
-)
-
 cc_library(
     name = "csharp",
     srcs = [

src/google/protobuf/compiler/java/BUILD.bazel

@@ -33,18 +33,6 @@ cc_library(
     ],
 )
 
-cc_library(
-    name = "generator_headers",
-    hdrs = ["generator.h"],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-    ],
-)
-
 cc_library(
     name = "context",
     hdrs = [

src/google/protobuf/compiler/kotlin/BUILD.bazel

@@ -1,18 +1,6 @@
 load("@rules_cc//cc:cc_library.bzl", "cc_library")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
-cc_library(
-    name = "generator_headers",
-    hdrs = ["generator.h"],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-    ],
-)
-
 cc_library(
     name = "kotlin",
     srcs = ["generator.cc"],

src/google/protobuf/compiler/objectivec/BUILD.bazel

@@ -17,18 +17,6 @@ cc_library(
     ],
 )
 
-cc_library(
-    name = "generator_headers",
-    hdrs = ["generator.h"],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-    ],
-)
-
 cc_library(
     name = "names_internal",
     srcs = [

src/google/protobuf/compiler/python/BUILD.bazel

@@ -6,26 +6,6 @@ load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
 load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
-cc_library(
-    name = "generator_headers",
-    hdrs = [
-        "generator.h",
-        "pyi_generator.h",
-    ],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-        "@abseil-cpp//absl/container:flat_hash_map",
-        "@abseil-cpp//absl/container:flat_hash_set",
-        "@abseil-cpp//absl/memory",
-        "@abseil-cpp//absl/strings",
-        "@abseil-cpp//absl/synchronization",
-    ],
-)
-
 cc_library(
     name = "python",
     srcs = [

src/google/protobuf/compiler/ruby/BUILD.bazel

@@ -6,18 +6,6 @@ load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
 load("@rules_pkg//pkg:mappings.bzl", "pkg_files", "strip_prefix")
 load("//build_defs:cpp_opts.bzl", "COPTS")
 
-cc_library(
-    name = "generator_headers",
-    hdrs = ["ruby_generator.h"],
-    copts = COPTS,
-    strip_include_prefix = "/src",
-    visibility = ["//pkg:__pkg__"],
-    deps = [
-        "//src/google/protobuf",
-        "//src/google/protobuf/compiler:code_generator",
-    ],
-)
-
 cc_library(
     name = "ruby",
     srcs = ["ruby_generator.cc"],