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# Adds a target that creates a datafile archive containing all files under selected source directory tree. For example:
#
# add_datafile(
# shatter
# SOURCE shatter
# OUTPUT shatter.dat
# RESOURCES resource_shatter
# )
#
# Will create 'shatter.dat' in the respective binary directory containing all files in 'shatter' subdirectory of current
# source directory. SOURCE option's argument defaults to the target name. OUTPUT option's argument defaults to the
# target name with ".dat" suffix.
#
# Optionally, RESOURCES can be used to specify binary resource targets from AddDownloadableResource that will provide
# additional directories with files that will also get included in the final datafile. In case of conflicts, files from
# source tree will be used. This is to allow working with binary assets located in source directory.
#
# SKIP_SOURCE option can be specified to skip adding the files from SOURCE directory completely.
#
# To create the archive the dat.exe is used - for non-Windows platforms an emulator that can run it is required.
function(add_datafile DATAFILE_TARGET)
cmake_parse_arguments(
PARSE_ARGV 1
DATAFILE
"SKIP_SOURCE"
"SOURCE;OUTPUT"
"RESOURCES"
)
if(NOT DEFINED DATAFILE_SOURCE)
set(DATAFILE_SOURCE ${DATAFILE_TARGET})
endif()
if(NOT DEFINED DATAFILE_OUTPUT)
set(DATAFILE_OUTPUT "${DATAFILE_TARGET}.dat")
endif()
cmake_path(ABSOLUTE_PATH DATAFILE_SOURCE NORMALIZE BASE_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
cmake_path(ABSOLUTE_PATH DATAFILE_OUTPUT NORMALIZE BASE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
if(CMAKE_HOST_SYSTEM_NAME MATCHES Windows)
set(DATAFILE_VAR PATH)
set(DATAFILE_PATHS $ENV{PATH})
else()
set(DATAFILE_VAR WINEPATH)
set(DATAFILE_PATHS $ENV{WINEPATH})
endif()
list(PREPEND DATAFILE_PATHS $<TARGET_FILE_DIR:Zlib::zlib>)
add_custom_command(
OUTPUT ${DATAFILE_OUTPUT}
COMMAND ${CMAKE_COMMAND} -E rm -f ${DATAFILE_OUTPUT}
COMMENT "Creating datafile ${DATAFILE_TARGET}"
)
foreach(RESOURCE_TARGET IN ITEMS ${DATAFILE_RESOURCES})
get_property(RESOURCE_DIRECTORY TARGET ${RESOURCE_TARGET} PROPERTY RESOURCE_DIRECTORY)
add_custom_command(
OUTPUT ${DATAFILE_OUTPUT} APPEND
DEPENDS ${RESOURCE_TARGET}
COMMAND
${CMAKE_COMMAND} -E chdir ${RESOURCE_DIRECTORY}
${CMAKE_COMMAND} -E env "${DATAFILE_VAR}='${DATAFILE_PATHS}'"
${CMAKE_CROSSCOMPILING_EMULATOR}
$<TARGET_FILE:dat> -cu $<SHELL_PATH:${DATAFILE_OUTPUT}> .
)
endforeach()
if(NOT DATAFILE_SKIP_SOURCE)
file(
GLOB_RECURSE DATAFILE_DEPENDENCIES
LIST_DIRECTORIES true
CONFIGURE_DEPENDS
"${DATAFILE_SOURCE}/*"
)
add_custom_command(
OUTPUT ${DATAFILE_OUTPUT} APPEND
DEPENDS ${DATAFILE_DEPENDENCIES}
COMMAND
${CMAKE_COMMAND} -E chdir ${DATAFILE_SOURCE}
${CMAKE_COMMAND} -E env "${DATAFILE_VAR}='${DATAFILE_PATHS}'"
${CMAKE_CROSSCOMPILING_EMULATOR}
$<TARGET_FILE:dat> -cu $<SHELL_PATH:${DATAFILE_OUTPUT}> .
)
endif()
add_custom_target(${DATAFILE_TARGET} ALL DEPENDS ${DATAFILE_OUTPUT})
endfunction()
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