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# This is an example script for use with CMake projects for locating and configuring
# the nanopb library.
#
# The following varialbes have to be set:
#
# NANOPB_SRC_ROOT_FOLDER - Path to nanopb source folder
#
# The following variables can be set and are optional:
#
#
# PROTOBUF_SRC_ROOT_FOLDER - When compiling with MSVC, if this cache variable is set
# the protobuf-default VS project build locations
# (vsprojects/Debug & vsprojects/Release) will be searched
# for libraries and binaries.
#
# NANOPB_IMPORT_DIRS - List of additional directories to be searched for
# imported .proto files.
#
# NANOPB_GENERATE_CPP_APPEND_PATH - By default -I will be passed to protoc
# for each directory where a proto file is referenced.
# Set to FALSE if you want to disable this behaviour.
#
# Defines the following variables:
#
# NANOPB_FOUND - Found the nanopb library (source&header files, generator tool, protoc compiler tool)
# NANOPB_INCLUDE_DIRS - Include directories for Google Protocol Buffers
#
# The following cache variables are also available to set or use:
# PROTOBUF_PROTOC_EXECUTABLE - The protoc compiler
# NANOPB_GENERATOR_SOURCE_DIR - The nanopb generator source
#
# ====================================================================
#
# NANOPB_GENERATE_CPP (public function)
# SRCS = Variable to define with autogenerated
# source files
# HDRS = Variable to define with autogenerated
# header files
# ARGN = proto files
#
# ====================================================================
# Example:
#
# set(NANOPB_SRC_ROOT_FOLDER "/path/to/nanopb")
# set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${NANOPB_SRC_ROOT_FOLDER}/cmake)
# find_package( Nanopb REQUIRED )
# include_directories(${NANOPB_INCLUDE_DIRS})
#
# NANOPB_GENERATE_CPP(PROTO_SRCS PROTO_HDRS foo.proto)
#
# include_directories(${CMAKE_CURRENT_BINARY_DIR})
# add_executable(bar bar.cc ${PROTO_SRCS} ${PROTO_HDRS})
#
# ====================================================================
#=============================================================================
# Copyright 2009 Kitware, Inc.
# Copyright 2009-2011 Philip Lowman <philip@yhbt.com>
# Copyright 2008 Esben Mose Hansen, Ange Optimization ApS
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# * Neither the names of Kitware, Inc., the Insight Software Consortium,
# nor the names of their contributors may be used to endorse or promote
# products derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#=============================================================================
#
# Changes
# 2013.01.31 - Pavlo Ilin - used Modules/FindProtobuf.cmake from cmake 2.8.10 to
# write FindNanopb.cmake
#
#=============================================================================
function(NANOPB_GENERATE_CPP SRCS HDRS)
if(NOT ARGN)
return()
endif()
if(NANOPB_GENERATE_CPP_APPEND_PATH)
# Create an include path for each file specified
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(ABS_PATH ${ABS_FIL} PATH)
list(FIND _nanobp_include_path ${ABS_PATH} _contains_already)
if(${_contains_already} EQUAL -1)
list(APPEND _nanobp_include_path -I ${ABS_PATH})
endif()
endforeach()
else()
set(_nanobp_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
endif()
if(DEFINED NANOPB_IMPORT_DIRS)
foreach(DIR ${NANOPB_IMPORT_DIRS})
get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
list(FIND _nanobp_include_path ${ABS_PATH} _contains_already)
if(${_contains_already} EQUAL -1)
list(APPEND _nanobp_include_path -I ${ABS_PATH})
endif()
endforeach()
endif()
set(${SRCS})
set(${HDRS})
set(GENERATOR_PATH ${CMAKE_BINARY_DIR}/nanopb/generator)
set(NANOPB_GENERATOR_EXECUTABLE ${GENERATOR_PATH}/nanopb_generator.py)
set(GENERATOR_CORE_DIR ${GENERATOR_PATH}/proto)
set(GENERATOR_CORE_SRC
${GENERATOR_CORE_DIR}/nanopb.proto
${GENERATOR_CORE_DIR}/plugin.proto)
# Treat the source diretory as immutable.
#
# Copy the generator directory to the build directory before
# compiling python and proto files. Fixes issues when using the
# same build directory with different python/protobuf versions
# as the binary build directory is discarded across builds.
#
add_custom_command(
OUTPUT ${NANOPB_GENERATOR_EXECUTABLE} ${GENERATOR_CORE_SRC}
COMMAND ${CMAKE_COMMAND} -E copy_directory
ARGS ${NANOPB_GENERATOR_SOURCE_DIR} ${GENERATOR_PATH}
VERBATIM)
set(GENERATOR_CORE_PYTHON_SRC)
foreach(FIL ${GENERATOR_CORE_SRC})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(FIL_WE ${FIL} NAME_WE)
set(output "${GENERATOR_CORE_DIR}/${FIL_WE}_pb2.py")
set(GENERATOR_CORE_PYTHON_SRC ${GENERATOR_CORE_PYTHON_SRC} ${output})
add_custom_command(
OUTPUT ${output}
COMMAND ${PROTOBUF_PROTOC_EXECUTABLE}
ARGS -I${GENERATOR_PATH}/proto
--python_out=${GENERATOR_CORE_DIR} ${ABS_FIL}
DEPENDS ${ABS_FIL}
VERBATIM)
endforeach()
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(FIL_WE ${FIL} NAME_WE)
get_filename_component(FIL_DIR ${FIL} PATH)
set(NANOPB_OPTIONS_FILE ${FIL_DIR}/${FIL_WE}.options)
set(NANOPB_OPTIONS)
if(EXISTS ${NANOPB_OPTIONS_FILE})
set(NANOPB_OPTIONS -f ${NANOPB_OPTIONS_FILE})
endif()
list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.c")
list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb"
COMMAND ${PROTOBUF_PROTOC_EXECUTABLE}
ARGS -I${GENERATOR_PATH} -I${GENERATOR_CORE_DIR}
-I${CMAKE_CURRENT_BINARY_DIR} ${_nanobp_include_path}
-o${FIL_WE}.pb ${ABS_FIL}
DEPENDS ${ABS_FIL} ${GENERATOR_CORE_PYTHON_SRC}
COMMENT "Running C++ protocol buffer compiler on ${FIL}"
VERBATIM )
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.c"
"${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
COMMAND ${PYTHON_EXECUTABLE}
ARGS ${NANOPB_GENERATOR_EXECUTABLE} ${FIL_WE}.pb ${NANOPB_OPTIONS}
DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb"
COMMENT "Running nanopb generator on ${FIL_WE}.pb"
VERBATIM )
endforeach()
set_source_files_properties(${${SRCS}} ${${HDRS}} PROPERTIES GENERATED TRUE)
set(${SRCS} ${${SRCS}} ${NANOPB_SRCS} PARENT_SCOPE)
set(${HDRS} ${${HDRS}} ${NANOPB_HDRS} PARENT_SCOPE)
endfunction()
#
# Main.
#
# By default have NANOPB_GENERATE_CPP macro pass -I to protoc
# for each directory where a proto file is referenced.
if(NOT DEFINED NANOPB_GENERATE_CPP_APPEND_PATH)
set(NANOPB_GENERATE_CPP_APPEND_PATH TRUE)
endif()
# Find the include directory
find_path(NANOPB_INCLUDE_DIRS
pb.h
PATHS ${NANOPB_SRC_ROOT_FOLDER}
)
mark_as_advanced(NANOPB_INCLUDE_DIRS)
# Find nanopb source files
set(NANOPB_SRCS)
set(NANOPB_HDRS)
list(APPEND _nanopb_srcs pb_decode.c pb_encode.c pb_common.c)
list(APPEND _nanopb_hdrs pb_decode.h pb_encode.h pb_common.h pb.h)
foreach(FIL ${_nanopb_srcs})
find_file(${FIL}__nano_pb_file NAMES ${FIL} PATHS ${NANOPB_SRC_ROOT_FOLDER} ${NANOPB_INCLUDE_DIRS})
list(APPEND NANOPB_SRCS "${${FIL}__nano_pb_file}")
mark_as_advanced(${FIL}__nano_pb_file)
endforeach()
foreach(FIL ${_nanopb_hdrs})
find_file(${FIL}__nano_pb_file NAMES ${FIL} PATHS ${NANOPB_INCLUDE_DIRS})
mark_as_advanced(${FIL}__nano_pb_file)
list(APPEND NANOPB_HDRS "${${FIL}__nano_pb_file}")
endforeach()
# Find the protoc Executable
find_program(PROTOBUF_PROTOC_EXECUTABLE
NAMES protoc
DOC "The Google Protocol Buffers Compiler"
PATHS
${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Release
${PROTOBUF_SRC_ROOT_FOLDER}/vsprojects/Debug
)
mark_as_advanced(PROTOBUF_PROTOC_EXECUTABLE)
# Find nanopb generator source dir
find_path(NANOPB_GENERATOR_SOURCE_DIR
NAMES nanopb_generator.py
DOC "nanopb generator source"
PATHS
${NANOPB_SRC_ROOT_FOLDER}/generator
)
mark_as_advanced(NANOPB_GENERATOR_SOURCE_DIR)
find_package(PythonInterp REQUIRED)
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(NANOPB DEFAULT_MSG
NANOPB_INCLUDE_DIRS
NANOPB_SRCS NANOPB_HDRS
NANOPB_GENERATOR_SOURCE_DIR
PROTOBUF_PROTOC_EXECUTABLE
)
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