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[cmake] Add helper options to flatbuffers_generate_headers() #9053

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[cmake] Add helper options to flatbuffers_generate_headers() #9053

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40 changes: 37 additions & 3 deletions CMake/BuildFlatBuffers.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -174,6 +174,12 @@ endfunction()
# the directories that need to be searched).
# INCLUDE_PREFIX: Optional. The directory in which to place the generated
# files. Use this instead of the --include-prefix option.
# FILENAME_SUFFIX: Optional. The suffix appended to the generated file names
# Use this instead of the --filename-suffix option.
# NO_FILENAME_SUFFIX: Optional. Appends a empty "" suffix to the generated
# file names. Use this instead of the --filename-suffix option.
# FILENAME_EXT: Optional. The extension appended to the generated file names.
# Use this instead of the --filename-ext option.
# FLAGS: Optional. A list of any additional flags that you would like to pass
# to flatc.
#
Expand All @@ -194,11 +200,14 @@ endfunction()
# add_dependencies(app GENERATE_my_generated_headers_target)
function(flatbuffers_generate_headers)
# Parse function arguments.
set(options)
set(options
"NO_FILENAME_SUFFIX")
set(one_value_args
"TARGET"
"INCLUDE_PREFIX"
"BINARY_SCHEMAS_DIR")
"BINARY_SCHEMAS_DIR"
"FILENAME_SUFFIX"
"FILENAME_EXT")
set(multi_value_args
"SCHEMAS"
"INCLUDE"
Expand All @@ -223,6 +232,31 @@ function(flatbuffers_generate_headers)
endif()

set(working_dir "${CMAKE_CURRENT_SOURCE_DIR}")

if(NOT "${FLATBUFFERS_GENERATE_HEADERS_FILENAME_SUFFIX}" STREQUAL "")
set(filename_suffix "${FLATBUFFERS_GENERATE_HEADERS_FILENAME_SUFFIX}")
list(APPEND FLATBUFFERS_GENERATE_HEADERS_FLAGS
"--filename-suffix" ${filename_suffix})
else()
set(filename_suffix "_generated")
endif()

if (FLATBUFFERS_GENERATE_HEADERS_NO_FILENAME_SUFFIX)
if (NOT "${FLATBUFFERS_GENERATE_HEADERS_FILENAME_SUFFIX}" STREQUAL "")
message(FATAL_ERROR "Only one of NO_FILENAME_SUFFIX or FILENAME_SUFFIX can be used.")
endif()
set(filename_suffix "")
list(APPEND FLATBUFFERS_GENERATE_HEADERS_FLAGS
"--filename-suffix" \"\")
endif()

if(NOT "${FLATBUFFERS_GENERATE_HEADERS_FILENAME_EXT}" STREQUAL "")
set(filename_ext ${FLATBUFFERS_GENERATE_HEADERS_FILENAME_EXT})
list(APPEND FLATBUFFERS_GENERATE_HEADERS_FLAGS
"--filename-ext" ${FLATBUFFERS_GENERATE_HEADERS_FILENAME_EXT})
else()
set(filename_ext "h")
endif()

# Generate the include files parameters.
set(include_params "")
Expand All @@ -244,7 +278,7 @@ function(flatbuffers_generate_headers)
# Create rules to generate the code for each schema.
foreach(schema ${FLATBUFFERS_GENERATE_HEADERS_SCHEMAS})
get_filename_component(filename ${schema} NAME_WE)
set(generated_include "${generated_include_dir}/${filename}_generated.h")
set(generated_include "${generated_include_dir}/${filename}${filename_suffix}.${filename_ext}")

# Generate files for grpc if needed
set(generated_source_file)
Expand Down