Version String Manipulation

macro(breakdown_version_string version major minor patch)
  if(${version} MATCHES ${THREE_PART_VERSION_REGEX})
    string(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+" "\\1" ${major} "${version}")
    string(REGEX REPLACE "^[0-9]+\\.([0-9])+\\.[0-9]+" "\\1" ${minor} "${version}")
    string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" ${patch} "${version}")
  else(${version} MATCHES ${THREE_PART_VERSION_REGEX})
    message("macro(breakdown_version_string ${version} ${major} ${minor} ${patch}")
    message(FATAL_ERROR "Problem parsing version string, I can't parse it properly.")
  endif(${version} MATCHES ${THREE_PART_VERSION_REGEX})
endmacro(breakdown_version_string)
 
# example usage
breakdown_version_string(${${PROJECT_NAME}_VERSION} CPACK_PACKAGE_VERSION_MAJOR CPACK_PACKAGE_VERSION_MINOR CPACK_PACKAGE_VERSION_PATCH)