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146 lines
6.1 KiB
CMake
146 lines
6.1 KiB
CMake
macro(_parse_arguments_with_multi_hack ORIGINAL_COMMAND_LINE)
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# cmake_parse_arguments() put all the MULTIS in a single variable; you
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# lose the ability to see for example multiple COMMANDs. To be able to
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# passthrough multiple MULTIS, we add a marker after every MULTI. This
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# allows us to reassemble the correct amount again before giving it to
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# the wrapped command with _reassemble_command_line().
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set(COMMAND_LINE "${ORIGINAL_COMMAND_LINE}")
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foreach(MULTI IN LISTS MULTIS)
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string(REPLACE "${MULTI}" "${MULTI};:::" COMMAND_LINE "${COMMAND_LINE}")
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endforeach()
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cmake_parse_arguments(PARAM "${OPTIONS}" "${SINGLES}" "${MULTIS}" ${COMMAND_LINE})
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endmacro()
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macro(_reassemble_command_line)
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# Reassemble the command line as we original got it.
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set(NEW_COMMAND_LINE ${PARAM_UNPARSED_ARGUMENTS})
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foreach(OPTION IN LISTS OPTIONS)
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if(PARAM_${OPTION})
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list(APPEND NEW_COMMAND_LINE "${OPTION}")
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endif()
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endforeach()
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foreach(SINGLE IN LISTS SINGLES)
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if(PARAM_${SINGLE})
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list(APPEND NEW_COMMAND_LINE "${SINGLE}" "${PARAM_${SINGLE}}")
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endif()
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endforeach()
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foreach(MULTI IN LISTS MULTIS)
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if(PARAM_${MULTI})
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# Replace our special marker with the name of the MULTI again. This
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# restores for example multiple COMMANDs again.
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string(REPLACE ":::" "${MULTI}" PARAM_${MULTI} "${PARAM_${MULTI}}")
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list(APPEND NEW_COMMAND_LINE "${PARAM_${MULTI}}")
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endif()
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endforeach()
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endmacro()
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# Generated files can be older than their dependencies, causing useless
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# regenerations. This function replaces each file in OUTPUT with a .timestamp
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# file, adds a command to touch it and move the original file in BYPRODUCTS,
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# before calling add_custom_command().
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#
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# Note: Any add_custom_target() depending on files in original OUTPUT must use
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# add_custom_target_timestamp() instead to have the correct dependencies.
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#
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# add_custom_command_timestamp(OUTPUT output1 [output2 ...]
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# COMMAND command1 [ARGS] [args1...]
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# [COMMAND command2 [ARGS] [args2...] ...]
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# [MAIN_DEPENDENCY depend]
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# [DEPENDS [depends...]]
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# [BYPRODUCTS [files...]]
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# [IMPLICIT_DEPENDS <lang1> depend1
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# [<lang2> depend2] ...]
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# [WORKING_DIRECTORY dir]
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# [COMMENT comment]
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# [VERBATIM] [APPEND] [USES_TERMINAL])
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function(add_custom_command_timestamp)
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set(OPTIONS VERBATIM APPEND USES_TERMINAL)
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set(SINGLES MAIN_DEPENDENCY WORKING_DIRECTORY COMMENT)
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set(MULTIS OUTPUT COMMAND DEPENDS BYPRODUCTS IMPLICIT_DEPENDS)
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_parse_arguments_with_multi_hack("${ARGN}")
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# Create a list of all the OUTPUTs (by removing our magic marker)
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string(REPLACE ":::;" "" OUTPUTS "${PARAM_OUTPUT}")
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# Reset the OUTPUT and BYPRODUCTS as an empty list (if needed).
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# Because they are MULTIS, we need to add our special marker here.
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set(PARAM_OUTPUT ":::")
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if(NOT PARAM_BYPRODUCTS)
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set(PARAM_BYPRODUCTS ":::")
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endif()
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foreach(OUTPUT IN LISTS OUTPUTS)
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# For every output, we add a 'cmake -E touch' entry to update the
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# timestamp on each run.
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get_filename_component(OUTPUT_FILENAME ${OUTPUT} NAME)
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string(APPEND PARAM_COMMAND ";:::;${CMAKE_COMMAND};-E;touch;${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_FILENAME}.timestamp")
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# We change the OUTPUT to a '.timestamp' variant, and make the real
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# output a byproduct.
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list(APPEND PARAM_OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_FILENAME}.timestamp)
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list(APPEND PARAM_BYPRODUCTS ${OUTPUT})
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# Mark this file as being a byproduct; we use this again with
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# add_custom_target_timestamp() to know if we should point to the
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# '.timestamp' variant or not.
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set_source_files_properties(${OUTPUT} PROPERTIES BYPRODUCT ${CMAKE_CURRENT_BINARY_DIR}/${OUTPUT_FILENAME}.timestamp)
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endforeach()
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# Reassemble and call the wrapped command
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_reassemble_command_line()
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add_custom_command(${NEW_COMMAND_LINE})
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endfunction()
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# Generated files can be older than their dependencies, causing useless
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# regenerations. This function adds a .timestamp file for each file in DEPENDS
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# replaced by add_custom_command_timestamp(), before calling add_custom_target().
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#
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# add_custom_target_timestamp(Name [ALL] [command1 [args1...]]
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# [COMMAND command2 [args2...] ...]
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# [DEPENDS depend depend depend ... ]
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# [BYPRODUCTS [files...]]
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# [WORKING_DIRECTORY dir]
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# [COMMENT comment]
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# [VERBATIM] [USES_TERMINAL]
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# [SOURCES src1 [src2...]])
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function(add_custom_target_timestamp)
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set(OPTIONS VERBATIM USES_TERMINAL)
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set(SINGLES WORKING_DIRECTORY COMMENT)
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set(MULTIS COMMAND DEPENDS BYPRODUCTS SOURCES)
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# ALL is missing, as the order is important here. It will be picked up
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# by ${PARAM_UNPARSED_ARGUMENTS} when reassembling the command line.
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_parse_arguments_with_multi_hack("${ARGN}")
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# Create a list of all the DEPENDs (by removing our magic marker)
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string(REPLACE ":::;" "" DEPENDS "${PARAM_DEPENDS}")
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# Reset the DEPEND as an empty list.
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# Because it is a MULTI, we need to add our special marker here.
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set(PARAM_DEPENDS ":::")
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foreach(DEPEND IN LISTS DEPENDS)
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# Check if the output is produced by add_custom_command_timestamp()
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get_source_file_property(BYPRODUCT ${DEPEND} BYPRODUCT)
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if(BYPRODUCT STREQUAL "NOTFOUND")
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# If it is not, just keep it as DEPEND
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list(APPEND PARAM_DEPENDS "${DEPEND}")
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else()
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# If it is, the BYPRODUCT property points to the timestamp we want to depend on
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list(APPEND PARAM_DEPENDS "${BYPRODUCT}")
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endif()
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endforeach()
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# Reassemble and call the wrapped command
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_reassemble_command_line()
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add_custom_target(${NEW_COMMAND_LINE})
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endfunction()
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