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execute_process(COMMAND "${GIT}" rev-parse --short HEAD RESULT_VARIABLE RET OUTPUT_VARIABLE COMMIT OUTPUT_STRIP_TRAILING_WHITESPACE)
if(RET)
message(WARNING "Cannot determine current commit. Make sure that you are building either from a Git working tree or from a source archive.")
set(VERSIONTAG "unknown")
configure_file("src/version.h.in" "${TO}")
else()
message(STATUS "You are currently on commit ${COMMIT}")
execute_process(COMMAND "${GIT}" show-ref --tags -d --abbrev COMMAND awk "END{print $1}" RESULT_VARIABLE RET OUTPUT_VARIABLE TAGGEDCOMMIT OUTPUT_STRIP_TRAILING_WHITESPACE)
if(RET OR NOT TAGGEDCOMMIT)
message(WARNING "Cannot determine most recent tag. Make sure that you are building either from a Git working tree or from a source archive.")
set(VERSIONTAG "${COMMIT}")
else()
message(STATUS "The most recent tag was at ${TAGGEDCOMMIT}")
if(${COMMIT} MATCHES ${TAGGEDCOMMIT})
message(STATUS "You are building a tagged release")
set(VERSIONTAG "release")
else()
message(STATUS "You are ahead or behind of a tagged release")
set(VERSIONTAG "${COMMIT}")
endif()
endif()
configure_file("src/version.h.in" "${TO}")
endif()
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