Add notices.txt with information about our dependencies' license and …

…add --notices flag to protoc to print the content of that file.

PiperOrigin-RevId: 723971692

CMakeLists.txt

@@ -139,6 +139,15 @@ file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/cmaketest.map
   local:
     *;
 };")
+
+# Create notices.h from notices.txt
+function(notices_as_header input_file output_header)
+  file(READ "${input_file}" notice_contents)
+  file(WRITE "${output_header}" "const char* notices_text = R\"(${notice_contents})\";\n")
+endfunction()
+
+notices_as_header("src/google/protobuf/compiler/notices.txt" "src/google/protobuf/compiler/notices.h")
+
 # CheckLinkerFlag module available in CMake >=3.18.
 if(${CMAKE_VERSION} VERSION_GREATER 3.18 OR ${CMAKE_VERSION} VERSION_EQUAL 3.18)
   include(CheckLinkerFlag)

MODULE.bazel

@@ -12,27 +12,30 @@ module(
 # Bzlmod follows MVS:
 # https://bazel.build/versions/6.0.0/build/bzlmod#version-resolution
 # Thus the highest version in their module graph is resolved.
+
+# LINT.IfChange
+# protoc dependencies
 bazel_dep(name = "abseil-cpp", version = "20240722.0", repo_name = "com_google_absl")
-bazel_dep(name = "bazel_skylib", version = "1.7.1")
-bazel_dep(name = "jsoncpp", version = "1.9.6")
-bazel_dep(name = "rules_apple", version = "3.13.0", repo_name = "build_bazel_rules_apple")
-bazel_dep(name = "apple_support", version = "1.15.1", repo_name = "build_bazel_apple_support")
 bazel_dep(name = "rules_cc", version = "0.0.17")
-bazel_dep(name = "rules_fuzzing", version = "0.5.2")
-bazel_dep(name = "rules_java", version = "8.6.1")
-bazel_dep(name = "rules_jvm_external", version = "6.3")
-bazel_dep(name = "rules_kotlin", version = "1.9.6")
 bazel_dep(name = "rules_license", version = "1.0.0")
 bazel_dep(name = "rules_pkg", version = "1.0.1")
 bazel_dep(name = "rules_python", version = "1.0.0")
-bazel_dep(name = "rules_rust", version = "0.51.0")
 bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "zlib", version = "1.3.1.bcr.5")
+# LINT.ThenChange(//depot/google3/third_party/protobuf/compiler/notices.txt)
+
+# other dependencies
+bazel_dep(name = "rules_apple", version = "3.13.0", repo_name = "build_bazel_rules_apple")
+bazel_dep(name = "apple_support", version = "1.15.1", repo_name = "build_bazel_apple_support")
 bazel_dep(name = "bazel_features", version = "1.23.0", repo_name = "proto_bazel_features")
-bazel_dep(
-    name = "rules_shell",
-    version = "0.2.0",
-)
+bazel_dep(name = "bazel_skylib", version = "1.7.1")
+bazel_dep(name = "jsoncpp", version = "1.9.6")
+bazel_dep(name = "rules_fuzzing", version = "0.5.2")
+bazel_dep(name = "rules_java", version = "8.6.1")
+bazel_dep(name = "rules_jvm_external", version = "6.3")
+bazel_dep(name = "rules_kotlin", version = "1.9.6")
+bazel_dep(name = "rules_rust", version = "0.51.0")
+bazel_dep(name = "rules_shell", version = "0.2.0")
 
 # Proto toolchains
 register_toolchains("//bazel/private/toolchains:all")

cmake/installed_include_golden.txt

@@ -25,6 +25,7 @@ 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/notices.h
 google/protobuf/compiler/objectivec/line_consumer.h
 google/protobuf/compiler/objectivec/names.h
 google/protobuf/compiler/objectivec/nsobject_methods.h

src/google/protobuf/compiler/BUILD.bazel

@@ -28,6 +28,18 @@ proto_library(
     deps = ["//:descriptor_proto"],
 )
 
+# Generate notices.h from notices.txt to import in cli.
+genrule(
+    name = "notices_header",
+    srcs = ["notices.txt"],
+    outs = ["notices.h"],
+    cmd = """
+        echo 'const char* notices_text = R"(' > $@
+        cat $< >> $@
+        echo ')";' >> $@
+    """,
+)
+
 cc_proto_library(
     name = "plugin_cc_proto",
     visibility = ["//visibility:public"],
@@ -179,6 +191,7 @@ cc_library(
         "command_line_interface.h",
         "subprocess.h",
         "zip_writer.h",
+        ":notices_header",
     ],
     copts = COPTS,
     strip_include_prefix = "/src",

src/google/protobuf/compiler/command_line_interface.cc

@@ -69,6 +69,7 @@
 #include "absl/types/span.h"
 #include "google/protobuf/compiler/code_generator.h"
 #include "google/protobuf/compiler/importer.h"
+#include "google/protobuf/compiler/notices.h"
 #include "google/protobuf/compiler/plugin.pb.h"
 #include "google/protobuf/compiler/retention.h"
 #include "google/protobuf/compiler/subprocess.h"
@@ -2004,7 +2005,8 @@ bool CommandLineInterface::ParseArgument(const char* arg, std::string* name,
       *name == "--experimental_editions" ||
       *name == "--print_free_field_numbers" ||
       *name == "--experimental_allow_proto3_optional" ||
-      *name == "--deterministic_output" || *name == "--fatal_warnings") {
+      *name == "--deterministic_output" || *name == "--fatal_warnings" ||
+      *name == "--notices") {
     // HACK:  These are the only flags that don't take a value.
     //   They probably should not be hard-coded like this but for now it's
     //   not worth doing better.
@@ -2322,6 +2324,9 @@ CommandLineInterface::InterpretArgument(const std::string& name,
     // life-ruining bugs *anyways*. As such, there is a reasonable probability
     // that there isn't another thread kicking environment variables at this
     // moment.
+  } else if (name == "--notices") {
+    std::cout << notices_text << std::endl;
+    return PARSE_ARGUMENT_DONE_AND_EXIT;
 
 #ifdef _WIN32
     ::_putenv(absl::StrCat(io::Printer::kProtocCodegenTrace, "=yes").c_str());
@@ -2502,7 +2507,8 @@ Parse PROTO_FILES and generate output based on the options given:
                               are counted as occupied fields numbers.
   --enable_codegen_trace      Enables tracing which parts of protoc are
                               responsible for what codegen output. Not supported
-                              by all backends or on all platforms.)";
+                              by all backends or on all platforms.
+  --notices                   Show notice file and exit.)";
   if (!plugin_prefix_.empty()) {
     std::cout << R"(
   --plugin=EXECUTABLE         Specifies a plugin executable to use.