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lokinet/cmake/Version.cmake

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CMake
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Put version info into a compiled file This rewrites the version info using lokid's approach of compiling it into a .cpp file that gets generated as part of the build (*not* during the configure stage). Among other things, this means that changing the version no longer invalidates ccache or cmake dependencies, and because it depends on `.git/index` git commits will cause the version to be regenerated, making the commit tag more reliable (currently if you rebuild without running cmake your git commit tag doesn't update).
2019-12-12 02:32:27 +00:00
find_package(Git QUIET)
allow building from source tarballs
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set(GIT_INDEX_FILE "${PROJECT_SOURCE_DIR}/.git/index")
if(EXISTS ${GIT_INDEX_FILE} AND GIT_FOUND OR Git_FOUND)
Put version info into a compiled file This rewrites the version info using lokid's approach of compiling it into a .cpp file that gets generated as part of the build (*not* during the configure stage). Among other things, this means that changing the version no longer invalidates ccache or cmake dependencies, and because it depends on `.git/index` git commits will cause the version to be regenerated, making the commit tag more reliable (currently if you rebuild without running cmake your git commit tag doesn't update).
2019-12-12 02:32:27 +00:00
message(STATUS "Found Git: ${GIT_EXECUTABLE}")
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/constants/version.cpp"
COMMAND "${CMAKE_COMMAND}"
"-D" "GIT=${GIT_EXECUTABLE}"
"-D" "SRC=${CMAKE_CURRENT_SOURCE_DIR}/constants/version.cpp.in"
"-D" "DEST=${CMAKE_CURRENT_BINARY_DIR}/constants/version.cpp"
"-P" "${CMAKE_CURRENT_LIST_DIR}/GenVersion.cmake"
DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/constants/version.cpp.in"
allow building from source tarballs
2020-03-01 13:42:44 +00:00
"${GIT_INDEX_FILE}")
Put version info into a compiled file This rewrites the version info using lokid's approach of compiling it into a .cpp file that gets generated as part of the build (*not* during the configure stage). Among other things, this means that changing the version no longer invalidates ccache or cmake dependencies, and because it depends on `.git/index` git commits will cause the version to be regenerated, making the commit tag more reliable (currently if you rebuild without running cmake your git commit tag doesn't update).
2019-12-12 02:32:27 +00:00
else()
allow building from source tarballs
2020-03-01 13:42:44 +00:00
message(STATUS "Git was not found! Setting version to to nogit")
Put version info into a compiled file This rewrites the version info using lokid's approach of compiling it into a .cpp file that gets generated as part of the build (*not* during the configure stage). Among other things, this means that changing the version no longer invalidates ccache or cmake dependencies, and because it depends on `.git/index` git commits will cause the version to be regenerated, making the commit tag more reliable (currently if you rebuild without running cmake your git commit tag doesn't update).
2019-12-12 02:32:27 +00:00
set(VERSIONTAG "nogit")
configure_file("${CMAKE_CURRENT_SOURCE_DIR}/constants/version.cpp.in" "${CMAKE_CURRENT_BINARY_DIR}/constants/version.cpp")
endif()
add_custom_target(genversion DEPENDS "${CMAKE_CURRENT_BINARY_DIR}/constants/version.cpp")
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