version.cmake.in

#performed in a small separate "cmake script" so can easily run on each build

execute_process(
   COMMAND @GIT_EXECUTABLE@ describe --always --tags --dirty
   OUTPUT_VARIABLE VERSION_STRING
   OUTPUT_STRIP_TRAILING_WHITESPACE
   RESULT_VARIABLE res
   WORKING_DIRECTORY @CMAKE_SOURCE_DIR@
)
if(NOT ${res} STREQUAL "0")
  message(FATAL_ERROR "git describe failed")
endif()
#unsure if this next is possible but just a failsafe
if("${VERSION_STRING}" STREQUAL "")
  set(VERSION_STRING "unknown")
endif()

configure_file(@CMAKE_CURRENT_SOURCE_DIR@/version.cpp.in @CMAKE_CURRENT_BINARY_DIR@/version.cpp @ONLY ESCAPE_QUOTES)