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# Cross-platform single file copy using fast native tools
#
# Required:
# COPY_SOURCE – pipe-separated list of source file paths
# COPY_DEST – destination directory
if(NOT COPY_SOURCE OR NOT COPY_DEST)
message(FATAL_ERROR "COPY_SOURCE and COPY_DEST must be set.")
endif()
string(REPLACE "|" ";" COPY_SOURCE "${COPY_SOURCE}")
if(CMAKE_HOST_WIN32)
# Group files by parent directory so we can batch them into single robocopy calls
set(dir_file_map "")
set(unique_dirs "")
foreach(filepath IN LISTS COPY_SOURCE)
get_filename_component(dir "${filepath}" DIRECTORY)
get_filename_component(name "${filepath}" NAME)
if(NOT dir IN_LIST unique_dirs)
list(APPEND unique_dirs "${dir}")
endif()
list(APPEND "FILES_IN_${dir}" "${name}")
endforeach()
foreach(dir IN LISTS unique_dirs)
execute_process(
COMMAND robocopy.exe "${dir}" "${COPY_DEST}" ${FILES_IN_${dir}} /MT /R:0 /W:0 /NP
RESULT_VARIABLE rc
)
if(rc GREATER 7) # Allows for "files copied" and "no files copied" cases, but treats actual errors as failures
message(FATAL_ERROR "robocopy failed (exit code ${rc})")
endif()
endforeach()
elseif(CMAKE_HOST_UNIX)
execute_process(
COMMAND rsync -av ${COPY_SOURCE} "${COPY_DEST}/"
RESULT_VARIABLE rs
)
if(rs GREATER 0) # Any non-zero exit code indicates an error
message(FATAL_ERROR "rsync failed (exit code ${rs})")
endif()
else()
message(FATAL_ERROR "Unsupported host platform for asset copying.")
endif()
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