compile .proto files with protoc so gp2040ce-binary-tools doesn't have to

this hopefully gets around the weird bug with Windows stuff that seems
to be caused by gRPC and/or dynamically compiling the files as part of
gp2040ce-binary-tools invocations

Author: bsstephan

compile_proto.cmake

@@ -20,6 +20,7 @@ function (compile_proto)
 	)
 
 	set(NANOPB_GENERATOR ${CMAKE_SOURCE_DIR}/lib/nanopb/generator/nanopb_generator.py)
+	set(PYTHON_GENERATOR ${CMAKE_SOURCE_DIR}/lib/nanopb/generator/protoc)
 	set(PROTO_OUTPUT_DIR ${CMAKE_CURRENT_BINARY_DIR}/proto)
 	set(PROTO_OUTPUT_DIR ${PROTO_OUTPUT_DIR} PARENT_SCOPE)
 
@@ -42,4 +43,27 @@ function (compile_proto)
 		OUTPUT ${PROTO_OUTPUT_DIR}/config.pb.c ${PROTO_OUTPUT_DIR}/config.pb.h ${PROTO_OUTPUT_DIR}/enums.pb.c ${PROTO_OUTPUT_DIR}/enums.pb.h
 		COMMENT "Compiling enums.proto and config.proto"
 	)
+
+	add_custom_command(
+		DEPENDS ${VENV_FILE} ${PYTHON_GENERATOR} ${CMAKE_SOURCE_DIR}/proto/enums.proto ${CMAKE_SOURCE_DIR}/proto/config.proto ${CMAKE_SOURCE_DIR}/lib/nanopb/generator/proto/nanopb.proto
+		WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+		COMMAND ${CMAKE_COMMAND} -E make_directory ${PROTO_OUTPUT_DIR}
+		COMMAND ${VENV_BIN_DIR}/python ${PYTHON_GENERATOR}
+			--python_out ${PROTO_OUTPUT_DIR}
+			-I ${CMAKE_SOURCE_DIR}/proto
+			-I ${CMAKE_SOURCE_DIR}/lib/nanopb/generator/proto
+			${CMAKE_SOURCE_DIR}/proto/enums.proto
+		COMMAND ${VENV_BIN_DIR}/python ${PYTHON_GENERATOR}
+			--python_out ${PROTO_OUTPUT_DIR}
+			-I ${CMAKE_SOURCE_DIR}/proto
+			-I ${CMAKE_SOURCE_DIR}/lib/nanopb/generator/proto
+			${CMAKE_SOURCE_DIR}/proto/config.proto
+		COMMAND ${VENV_BIN_DIR}/python ${PYTHON_GENERATOR}
+			--python_out ${PROTO_OUTPUT_DIR}
+			-I ${CMAKE_SOURCE_DIR}/proto
+			-I ${CMAKE_SOURCE_DIR}/lib/nanopb/generator/proto
+			${CMAKE_SOURCE_DIR}/lib/nanopb/generator/proto/nanopb.proto
+		OUTPUT ${PROTO_OUTPUT_DIR}/config_pb2.py ${PROTO_OUTPUT_DIR}/enums_pb2.py ${PROTO_OUTPUT_DIR}/nanopb_pb2.py
+		COMMENT "Compiling config_pb2.py, enums_pb2.py, and nanopb_pb2.py Python modules"
+	)
 endfunction()

patch_board_config.cmake

@@ -12,7 +12,7 @@ function (patch_board_config)
 
 	add_custom_target(
 		PatchBoardConfig ALL
-		DEPENDS ${PROJECT_NAME}
+		DEPENDS ${PROJECT_NAME} ${PROTO_OUTPUT_DIR}/config_pb2.py ${PROTO_OUTPUT_DIR}/enums_pb2.py ${PROTO_OUTPUT_DIR}/nanopb_pb2.py
 		WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
 		# something in the protobuf compiler doesn't like the multiple paths,
 		# so we'll copy all the .proto files into one location