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# Adds a target that generates file with version information:
#
# add_version_file(version.txt version.txt.conf ALL)
#
# Where 'version.txt.conf' is a template file which has referenced like "@VARIABLE@" substituted with appropriate
# values.
set(ADD_VERSION_FILE_DIR "${CMAKE_CURRENT_LIST_DIR}")
function(add_version_file OUTPUT TEMPLATE)
cmake_parse_arguments(PARSE_ARGV 2 VERSION_FILE "ALL" "" "")
if(VERSION_FILE_ALL)
set(VERSION_FILE_ALL_ARG ALL)
endif()
add_custom_target(
${OUTPUT}
${VERSION_FILE_ALL_ARG}
BYPRODUCTS "${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE}"
WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
COMMAND
cmake
-DCMAKE_MODULE_PATH='${ADD_VERSION_FILE_DIR}'
-DOUTPUT='${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT}'
-DTEMPLATE='${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE}'
-P "${ADD_VERSION_FILE_DIR}/generate_version_file.cmake")
endfunction()
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