#!/bin/sh

DATELOG=some_text
TOO="mail@domain.tld"
HOST=hostname

date > $DATELOG

for com in buildworld buildkernel installkernel installworld
  do echo " make $com begins" >> $DATELOG
     make $com
       if [ "$?" != "0" ]; then
         echo "Err in  make $com at $(date) " >> $DATELOG
         cat $DATELOG | mail -s "$HOST $com Err!" "$TOO"
         exit 
       else date >> $DATELOG 
         echo " $HOST make $com OK" >> $DATELOG
       fi
done

# if not exit do
echo "" >> $DATELOG
echo "full build ends at $(date)" >> $DATELOG
cat $DATELOG | mail -s "$HOST's rebuild Success!" "$TOO"