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# Try to identify the current development source version.
set(CMake_VERSION_SOURCE "")
if(EXISTS ${CMake_SOURCE_DIR}/.git/HEAD)
find_program(GIT_EXECUTABLE NAMES git git.cmd)
mark_as_advanced(GIT_EXECUTABLE)
if(GIT_EXECUTABLE)
execute_process(
COMMAND ${GIT_EXECUTABLE} rev-parse --verify -q --short=4 HEAD
OUTPUT_VARIABLE head
OUTPUT_STRIP_TRAILING_WHITESPACE
WORKING_DIRECTORY ${CMake_SOURCE_DIR}
)
if(head)
set(CMake_VERSION_SOURCE "g${head}")
execute_process(
COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
WORKING_DIRECTORY ${CMake_SOURCE_DIR}
)
execute_process(
COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
OUTPUT_VARIABLE dirty
OUTPUT_STRIP_TRAILING_WHITESPACE
WORKING_DIRECTORY ${CMake_SOURCE_DIR}
)
if(dirty)
set(CMake_VERSION_IS_DIRTY 1)
endif()
endif()
endif()
endif()
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