def create_source_date_epoch_stamp(d):
    import oe.reproducible

    epochfile = d.getVar('SDE_FILE')
    # If it exists we need to regenerate as the sources may have changed
    if os.path.isfile(epochfile):
        bb.debug(1, "Deleting existing SOURCE_DATE_EPOCH from: %s" % epochfile)
        os.remove(epochfile)

    source_date_epoch = oe.reproducible.get_source_date_epoch(d, d.getVar('S'))

    bb.debug(1, "SOURCE_DATE_EPOCH: %d" % source_date_epoch)
    bb.utils.mkdirhier(d.getVar('SDE_DIR'))
    with open(epochfile, 'w') as f:
        f.write(str(source_date_epoch))

create_source_date_epoch_stamp(d)