# This script returns the current date in ISO format

#

# YYYY-MM-DD

#

MACRO (TODAY RESULT)

    if (DEFINED ENV{SOURCE_DATE_EPOCH} AND NOT WIN32)

        EXECUTE_PROCESS(COMMAND "date" "-u" "-d" "@$ENV{SOURCE_DATE_EPOCH}" "+%Y-%m-%d"

                        OUTPUT_VARIABLE ${RESULT} OUTPUT_STRIP_TRAILING_WHITESPACE)

    elseif(CMAKE_VERSION VERSION_LESS "2.8.11")

	if (WIN32)

		message(FATAL_ERROR "Your CMake version is too old. Please update to a more recent version >= 2.8.11")

	else()

		EXECUTE_PROCESS(COMMAND "date" "-u" "+%Y-%m-%d"

                        OUTPUT_VARIABLE ${RESULT} OUTPUT_STRIP_TRAILING_WHITESPACE)

	endif()

    else()

        STRING(TIMESTAMP ${RESULT} "%Y-%m-%d" UTC)

    endif()

ENDMACRO (TODAY)