chore: import upstream snapshot with attribution

cmake/CompileProto.cmake

@@ -0,0 +1,34 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+function(compile_proto OUT_HDRS OUT_SRCS DESTDIR HDR_OUTPUT_DIR PROTO_DIR PROTO_FILES)
+  foreach(P ${PROTO_FILES})
+    string(REPLACE .proto .pb.h HDR ${P})
+    set(HDR_RELATIVE ${HDR})
+    set(HDR ${DESTDIR}/${HDR})
+    string(REPLACE .proto .pb.cc SRC ${P})
+    set(SRC ${DESTDIR}/${SRC})
+    list(APPEND HDRS ${HDR})
+    list(APPEND SRCS ${SRC})
+    add_custom_command(
+      OUTPUT ${HDR} ${SRC}
+      COMMAND ${PROTOBUF_PROTOC_EXECUTABLE} ${PROTOC_FLAGS} -I${PROTO_DIR} --cpp_out=${DESTDIR} ${PROTO_DIR}/${P}
+      COMMAND ${CMAKE_COMMAND} -E copy ${HDR} ${HDR_OUTPUT_DIR}/${HDR_RELATIVE}
+      DEPENDS ${PROTO_DIR}/${P}
+    )
+  endforeach()
+  set(${OUT_HDRS} ${HDRS} PARENT_SCOPE)
+  set(${OUT_SRCS} ${SRCS} PARENT_SCOPE)
+endfunction()