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42 lines
1.3 KiB
42 lines
1.3 KiB
15 years ago
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# Create a rule to generate a version string at compile time.
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#
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# SRC is processed using the configure_file() cmake command
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# at build to produce DST with the following variable available:
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#
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# - BASE_VERSION: The contents of the file specified by VERSION_FILE.
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# - GIT_COMMIT: The current git commit. This variable is not defined if there is no GIT_DIR directory.
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# - SHORT_GIT_COMMIT: The first 10 characters of the git commit.
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# For the exact syntax of SRC see the documentation of the configure_file() cmake command.
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#
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# The version file is regenerated whenever VERSION_FILE or the current commit changes.
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function(version_file SRC DST VERSION_FILE GIT_DIR)
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get_filename_component(ABS_SRC "${SRC}" ABSOLUTE)
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get_filename_component(ABS_DST "${DST}" ABSOLUTE)
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get_filename_component(ABS_VERSION_FILE "${VERSION_FILE}" ABSOLUTE)
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get_filename_component(ABS_GIT_DIR "${GIT_DIR}" ABSOLUTE)
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add_custom_command(
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OUTPUT
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"${DST}"
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COMMAND
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${CMAKE_COMMAND}
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"-DINPUT=${ABS_SRC}"
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"-DOUTPUT=${ABS_DST}"
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"-DVERSION_FILE=${ABS_VERSION_FILE}"
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"-DGIT_DIR=${ABS_GIT_DIR}"
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-P "${CMAKE_MODULE_PATH}/VersionScript.cmake"
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MAIN_DEPENDENCY
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"${SRC}"
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DEPENDS
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"${GIT_DIR}/HEAD"
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"${GIT_DIR}/logs/HEAD"
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"${VERSION_FILE}"
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"${CMAKE_MODULE_PATH}/VersionScript.cmake"
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COMMENT ""
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VERBATIM
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)
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endfunction(version_file)
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