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# Generate version.c using git describe
#
# Usage:
# set(VER_C ${CMAKE_BINARY_DIR}/ver_vcs.cpp)
# add_custom_target(version_vcs
# ${CMAKE_COMMAND}
# -DVERSION_IN=ver_vcs.cpp.in
# -DVERSION_C=${VER_C}
# -DVCS_REPO_DIR=submodule # optional
# -P cmake/versioning.cmake
# BYPRODUCTS ${VER_C}
# WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
# )
if (NOT DEFINED VCS_REPO_DIR)
set(VCS_REPO_DIR ${CMAKE_CURRENT_SOURCE_DIR})
endif ()
find_package(Git)
if (GIT_EXECUTABLE)
execute_process(
COMMAND ${GIT_EXECUTABLE} describe --always --tags --dirty
OUTPUT_VARIABLE GIT_VERSION
RESULT_VARIABLE GIT_ERROR_CODE
OUTPUT_STRIP_TRAILING_WHITESPACE
WORKING_DIRECTORY ${VCS_REPO_DIR}
)
if (NOT GIT_ERROR_CODE)
set(VCS_VERSION ${GIT_VERSION})
endif ()
endif ()
get_filename_component(VCS_MODULE ${VCS_REPO_DIR} NAME)
if (VCS_VERSION)
message("${VCS_MODULE} VCS_VERSION: " ${VCS_VERSION})
configure_file(${VERSION_IN} ${VERSION_C})
else ()
message("${VCS_MODULE} VCS_VERSION unknown. ${VERSION_C} not changed.")
endif ()
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