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Only replace fingerprint file when MD5 changes. Avoids rebuilding several things if nothing has actually changes, as cmake is only looking at timestamps.

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Daniel Patterson 2015-07-24 18:45:33 -07:00 committed by Daniel J. Hofmann
parent bac6703f8e
commit b2d444d782
1 changed files with 18 additions and 4 deletions
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22
cmake/FingerPrint-Config.cmake
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@ -1,10 +1,24 @@
set(OLDFILE ${SOURCE_DIR}/util/fingerprint_impl.hpp) set(OLDFILE ${SOURCE_DIR}/util/fingerprint_impl.hpp)
if (EXISTS ${OLDFILE}) set(NEWFILE ${OLDFILE}.tmp)
file(REMOVE_RECURSE ${OLDFILE}) set(INFILE ${OLDFILE}.in)
endif()
file(MD5 ${SOURCE_DIR}/prepare.cpp MD5PREPARE) file(MD5 ${SOURCE_DIR}/prepare.cpp MD5PREPARE)
file(MD5 ${SOURCE_DIR}/data_structures/static_rtree.hpp MD5RTREE) file(MD5 ${SOURCE_DIR}/data_structures/static_rtree.hpp MD5RTREE)
file(MD5 ${SOURCE_DIR}/util/graph_loader.hpp MD5GRAPH) file(MD5 ${SOURCE_DIR}/util/graph_loader.hpp MD5GRAPH)
file(MD5 ${SOURCE_DIR}/server/data_structures/internal_datafacade.hpp MD5OBJECTS) file(MD5 ${SOURCE_DIR}/server/data_structures/internal_datafacade.hpp MD5OBJECTS)
CONFIGURE_FILE(${SOURCE_DIR}/util/fingerprint_impl.hpp.in ${SOURCE_DIR}/util/fingerprint_impl.hpp) CONFIGURE_FILE(${INFILE} ${NEWFILE})
file(MD5 ${NEWFILE} MD5NEW)
if (EXISTS ${OLDFILE})
file(MD5 ${OLDFILE} MD5OLD)
if(NOT ${MD5NEW} STREQUAL ${MD5OLD})
file(REMOVE_RECURSE ${OLDFILE})
file(RENAME ${NEWFILE} ${OLDFILE})
else()
file(REMOVE_RECURSE ${NEWFILE})
message(STATUS "Fingerprint unchanged, not regenerating")
endif()
else()
file(RENAME ${NEWFILE} ${OLDFILE})
endif()