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set(VERSION_MAJOR 2)
set(VERSION_MINOR 0)
set(VERSION_PATCH 8)
set(VERSION_COMMIT 0)
find_program(GIT git)
if(GIT AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/.git")
execute_process(
COMMAND ${GIT} describe --tags
WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
OUTPUT_VARIABLE GIT_DESCRIBE_DIRTY
OUTPUT_STRIP_TRAILING_WHITESPACE
RESULT_VARIABLE GIT_DESCRIBE_RESULT
)
if(GIT_DESCRIBE_RESULT EQUAL 0)
# Test if the most recent Git tag matches the pattern "v<major>.<minor>.<patch>*"
if(GIT_DESCRIBE_DIRTY MATCHES "^v[0-9]+\\.[0-9]+\\.[0-9]+.*")
string(REGEX REPLACE "^v([0-9]+)\\..*" "\\1" VERSION_MAJOR "${GIT_DESCRIBE_DIRTY}")
string(REGEX REPLACE "^v[0-9]+\\.([0-9]+).*" "\\1" VERSION_MINOR "${GIT_DESCRIBE_DIRTY}")
string(REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" VERSION_PATCH "${GIT_DESCRIBE_DIRTY}")
string(REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+\\-([0-9]+).*" "\\1" VERSION_COMMIT "${GIT_DESCRIBE_DIRTY}")
# If the tag points to the commit, then only the tag is shown in "git describe"
if(VERSION_COMMIT STREQUAL GIT_DESCRIBE_DIRTY)
set(VERSION_COMMIT 0)
endif()
else()
message(WARNING "\"${GIT_DESCRIBE_DIRTY}\" does not match pattern v<major>.<minor>.<patch>-<commit>")
endif()
else()
message(WARNING "git describe failed with exit code: ${GIT_DESCRIBE_RESULT}")
endif()
else()
message(WARNING "git is not found")
endif()
message(STATUS "Proceeding with version: ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}.${VERSION_COMMIT}")
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